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Portland Harbour - Sandsfoot Castle (Beach) (Dorset) weather

Here are our top tips to keep you, your friends and family safe at the beach with links to Royal National Lifeboat Institution (RNLI) and Met Office advice.



Forecast days

Light showers.
Beach safety today
Use caution in the sea. Waves can be bigger or stronger than you expect, strong rips likely, the wind may blow you off course
  • • unsafe for novice surfers
  • • paddle boarding not recommended for beginners/intermediate

Tide: Next low tide (0.8m) at

Sunrise iconSunrise:
Sunset iconSunset:
L UV
L Pollution
No pollen data.

    7 day forecast for Portland Harbour - Sandsfoot Castle (Beach)

    Today (20 December 2025)
    Time
    22:00
    23:00
    Weather symbols Light shower night Light shower night
    Chance of precipitation
    50%
    70%
    Temperature
    10°
    10°
    Feels like temperature (°C)
    Wind direction and speed
    SSE
    14
    SSE
    12
    Wind gust (mph)
    28
    25
    Visibility
    E
    E
    Humidity
    92%
    90%
    UV - -
    Wind direction and speed
    14
    12
    Height of waves offshore (m)
    0.8
    0.8
    Period of waves offshore (s)
    6
    6
    Direction of waves offshore
    Sunday (21 December 2025)
    Time
    00:00
    01:00
    02:00
    03:00
    04:00
    05:00
    06:00
    07:00
    08:00
    09:00
    10:00
    11:00
    12:00
    13:00
    14:00
    15:00
    16:00
    17:00
    18:00
    19:00
    20:00
    21:00
    22:00
    23:00
    Weather symbols Light shower night Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night Sunny intervals Cloudy Sunny intervals Cloudy Cloudy Sunny intervals Overcast Overcast Overcast Overcast Overcast Light rain Light rain Light rain Light rain Heavy rain
    Chance of precipitation
    50%
    40%
    20%
    20%
    20%
    20%
    20%
    10%
    10%
    30%
    30%
    20%
    30%
    30%
    20%
    30%
    30%
    30%
    50%
    70%
    80%
    80%
    80%
    90%
    Temperature (°C)
    10°
    10°
    10°
    10°
    10°
    10°
    11°
    11°
    11°
    11°
    11°
    10°
    10°
    10°
    10°
    10°
    10°
    11°
    11°
    Feels like temperature (°C)
    Wind direction and speed (mph)
    S
    10
    S
    8
    S
    7
    S
    6
    SSE
    5
    SE
    5
    SE
    6
    ESE
    8
    ESE
    9
    ESE
    10
    ESE
    12
    ESE
    13
    E
    14
    E
    15
    E
    16
    E
    15
    E
    15
    ENE
    14
    ENE
    13
    ENE
    13
    NE
    13
    ENE
    13
    ENE
    14
    E
    14
    Wind gust (mph)
    23
    19
    15
    12
    11
    13
    15
    17
    19
    20
    21
    21
    24
    26
    26
    26
    24
    24
    24
    22
    24
    22
    21
    21
    Visibility (description)
    E
    E
    E
    E
    E
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    G
    G
    G
    M
    M
    M
    M
    Humidity
    89%
    85%
    86%
    86%
    86%
    87%
    87%
    89%
    90%
    89%
    88%
    88%
    87%
    87%
    87%
    89%
    92%
    93%
    94%
    94%
    95%
    96%
    96%
    95%
    UV - - - - - - - - 1 1 1 1 1 1 1 1 1 - - - - - - -
    Wind direction and speed (mph)
    10
    8
    7
    6
    5
    5
    6
    8
    9
    10
    12
    13
    14
    15
    16
    15
    15
    14
    13
    13
    13
    13
    14
    14
    Height of waves offshore (m)
    0.7
    0.7
    0.7
    0.6
    0.5
    0.5
    0.4
    0.4
    0.3
    0.3
    0.4
    0.4
    0.6
    0.7
    0.8
    0.8
    0.8
    0.8
    0.7
    0.6
    0.6
    0.6
    0.6
    0.8
    Period of waves offshore (s)
    6
    6
    6
    6
    6
    5
    5
    5
    5
    5
    5
    5
    4
    4
    5
    5
    5
    5
    5
    5
    5
    5
    5
    6
    Direction of waves offshore
    Monday (22 December 2025)
    Time
    00:00
    01:00
    02:00
    03:00
    04:00
    05:00
    06:00
    07:00
    08:00
    09:00
    10:00
    11:00
    12:00
    13:00
    14:00
    15:00
    16:00
    17:00
    18:00
    19:00
    20:00
    21:00
    22:00
    23:00
    Weather symbols Light rain Light rain Light rain Light rain Overcast Overcast Overcast Overcast Overcast Cloudy Cloudy Cloudy Sunny intervals Sunny intervals Cloudy Cloudy Cloudy Cloudy Partly cloudy night Cloudy Cloudy Cloudy Cloudy Cloudy
    Chance of precipitation
    90%
    80%
    70%
    50%
    40%
    30%
    20%
    20%
    <5%
    <5%
    10%
    10%
    <5%
    <5%
    <5%
    <5%
    <5%
    10%
    10%
    10%
    10%
    <5%
    <5%
    <5%
    Temperature (°C)
    11°
    11°
    11°
    11°
    11°
    11°
    11°
    11°
    11°
    11°
    11°
    11°
    12°
    12°
    12°
    12°
    11°
    11°
    11°
    11°
    10°
    10°
    10°
    10°
    Feels like temperature (°C)
    10°
    10°
    Wind direction and speed (mph)
    E
    14
    E
    14
    E
    13
    E
    13
    E
    13
    E
    13
    E
    12
    E
    12
    E
    11
    E
    11
    E
    11
    E
    11
    E
    11
    E
    11
    E
    11
    E
    10
    E
    10
    E
    9
    E
    9
    E
    9
    E
    9
    E
    9
    ENE
    8
    ENE
    8
    Wind gust (mph)
    21
    21
    23
    21
    21
    20
    20
    21
    19
    19
    19
    19
    18
    18
    15
    15
    16
    15
    14
    12
    12
    12
    12
    12
    Visibility (description)
    M
    G
    G
    G
    G
    G
    G
    M
    M
    M
    M
    M
    G
    G
    G
    G
    G
    G
    G
    G
    M
    M
    M
    M
    Humidity
    95%
    95%
    94%
    94%
    94%
    95%
    94%
    94%
    93%
    93%
    92%
    91%
    88%
    85%
    84%
    85%
    88%
    91%
    90%
    91%
    92%
    92%
    92%
    93%
    UV - - - - - - - - 1 1 1 1 1 1 1 1 1 - - - - - - -
    Wind direction and speed (mph)
    14
    14
    13
    13
    13
    13
    12
    12
    11
    11
    11
    11
    11
    11
    11
    10
    10
    9
    9
    9
    9
    9
    8
    8
    Height of waves offshore (m)
    0.9
    1.0
    1.1
    1.1
    1.0
    0.9
    0.9
    0.8
    0.8
    0.7
    0.6
    0.6
    0.6
    0.6
    0.6
    0.5
    0.5
    0.5
    0.4
    0.4
    0.4
    0.4
    0.4
    0.4
    Period of waves offshore (s)
    6
    6
    7
    7
    7
    6
    6
    6
    6
    6
    6
    6
    6
    6
    6
    5
    5
    5
    5
    5
    5
    5
    4
    4
    Direction of waves offshore
    Tuesday (23 December 2025)
    Time
    00:00
    01:00
    02:00
    03:00
    04:00
    05:00
    06:00
    07:00
    08:00
    09:00
    10:00
    11:00
    12:00
    13:00
    14:00
    15:00
    16:00
    17:00
    18:00
    19:00
    20:00
    21:00
    22:00
    23:00
    Weather symbols Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast
    Chance of precipitation
    <5%
    10%
    10%
    10%
    10%
    10%
    10%
    10%
    10%
    10%
    10%
    10%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    Temperature (°C)
    10°
    10°
    10°
    10°
    10°
    10°
    10°
    10°
    Feels like temperature (°C)
    Wind direction and speed (mph)
    ENE
    8
    ENE
    8
    ENE
    8
    ENE
    8
    NE
    9
    NE
    9
    NE
    10
    NE
    10
    NE
    10
    NE
    10
    NE
    10
    NE
    10
    NE
    11
    NE
    11
    NE
    12
    NE
    12
    NE
    12
    NE
    12
    NE
    13
    NE
    13
    NE
    14
    NE
    14
    NE
    15
    NE
    15
    Wind gust (mph)
    12
    13
    13
    14
    14
    14
    14
    15
    15
    17
    17
    17
    18
    18
    19
    19
    19
    21
    21
    23
    23
    24
    24
    25
    Visibility (description)
    M
    M
    M
    M
    M
    M
    M
    M
    M
    M
    M
    M
    M
    M
    G
    G
    G
    G
    G
    G
    G
    G
    G
    G
    Humidity
    93%
    93%
    93%
    93%
    92%
    92%
    92%
    92%
    91%
    91%
    88%
    86%
    84%
    84%
    83%
    83%
    84%
    83%
    83%
    83%
    83%
    82%
    83%
    84%
    UV - - - - - - - - 1 1 1 1 1 1 1 1 1 - - - - - - -
    Wind direction and speed (mph)
    8
    8
    8
    8
    9
    9
    10
    10
    10
    10
    10
    10
    11
    11
    12
    12
    12
    12
    13
    13
    14
    14
    15
    15
    Height of waves offshore (m)
    0.4
    0.4
    0.4
    0.4
    0.3
    0.3
    0.3
    0.5
    0.5
    0.5
    0.4
    0.4
    0.4
    0.4
    0.4
    0.4
    0.4
    0.4
    0.5
    0.5
    0.5
    0.5
    0.5
    0.6
    Period of waves offshore (s)
    4
    4
    4
    4
    4
    4
    4
    6
    6
    8
    9
    9
    9
    9
    5
    2
    3
    3
    3
    3
    3
    3
    3
    3
    Direction of waves offshore
    Wednesday (24 December 2025)
    Time
    00:00
    01:00
    02:00
    03:00
    04:00
    05:00
    06:00
    07:00
    08:00
    09:00
    10:00
    11:00
    12:00
    13:00
    14:00
    15:00
    16:00
    17:00
    18:00
    19:00
    20:00
    21:00
    22:00
    23:00
    Weather symbols Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny day Clear night Clear night Clear night Clear night Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night
    Chance of precipitation
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    Temperature (°C)
    Feels like temperature (°C)
    -1°
    -1°
    -2°
    -2°
    -2°
    -2°
    -2°
    Wind direction and speed (mph)
    NE
    15
    NE
    15
    NE
    15
    NE
    16
    NE
    16
    NE
    17
    NE
    17
    NE
    17
    NE
    18
    ENE
    18
    ENE
    19
    ENE
    19
    ENE
    19
    ENE
    19
    NE
    19
    NE
    20
    NE
    20
    NE
    20
    NE
    20
    NE
    20
    NE
    20
    NE
    19
    NE
    18
    NE
    17
    Wind gust (mph)
    27
    28
    29
    31
    31
    32
    32
    32
    33
    33
    33
    33
    32
    32
    32
    33
    34
    35
    35
    35
    35
    34
    34
    32
    Visibility (description)
    G
    G
    G
    G
    G
    G
    G
    G
    G
    G
    G
    G
    G
    G
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    Humidity
    83%
    83%
    83%
    82%
    81%
    80%
    80%
    78%
    78%
    76%
    75%
    73%
    68%
    67%
    66%
    67%
    68%
    72%
    73%
    73%
    74%
    75%
    76%
    76%
    UV - - - - - - - - 1 1 1 1 1 1 1 1 1 - - - - - - -
    Wind direction and speed (mph)
    15
    15
    15
    16
    16
    17
    17
    17
    18
    18
    19
    19
    19
    19
    19
    20
    20
    20
    20
    20
    20
    19
    18
    17
    Height of waves offshore (m)
    0.6
    0.6
    0.6
    0.6
    0.6
    0.6
    0.7
    0.7
    0.7
    0.7
    0.7
    0.7
    0.7
    0.7
    0.7
    0.7
    0.7
    0.7
    0.7
    0.7
    0.7
    0.7
    0.7
    0.7
    Period of waves offshore (s)
    4
    4
    4
    4
    4
    4
    5
    5
    5
    8
    8
    8
    8
    8
    9
    9
    5
    5
    5
    5
    9
    9
    9
    9
    Direction of waves offshore
    Thursday (25 December 2025)
    Time
    00:00
    03:00
    06:00
    09:00
    12:00
    15:00
    18:00
    21:00
    Weather symbols Partly cloudy night Partly cloudy night Partly cloudy night Sunny intervals Sunny intervals Overcast Overcast Overcast
    Chance of precipitation
    <5%
    10%
    10%
    10%
    10%
    10%
    10%
    10%
    Temperature (°C)
    Feels like temperature (°C)
    -2°
    -3°
    -4°
    -3°
    -1°
    -2°
    -2°
    Wind direction and speed (mph)
    NE
    17
    NE
    16
    NE
    16
    NE
    16
    NE
    18
    NE
    16
    NE
    13
    NE
    11
    Wind gust (mph)
    31
    31
    31
    33
    32
    27
    25
    22
    Visibility (description)
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    Humidity
    77%
    78%
    75%
    72%
    64%
    64%
    71%
    78%
    UV - - - 1 1 1 - -
    Wind direction and speed (mph)
    17
    16
    16
    16
    18
    16
    13
    11
    Height of waves offshore (m)
    0.7
    0.7
    0.7
    0.8
    0.8
    0.8
    0.8
    0.7
    Period of waves offshore (s)
    5
    5
    3
    3
    9
    9
    7
    9
    Direction of waves offshore
    Friday (26 December 2025)
    Time
    00:00
    03:00
    06:00
    09:00
    12:00
    15:00
    18:00
    21:00
    Weather symbols Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast
    Chance of precipitation
    10%
    <5%
    10%
    10%
    <5%
    <5%
    <5%
    <5%
    Temperature (°C)
    Feels like temperature (°C)
    -2°
    -2°
    -3°
    -2°
    Wind direction and speed (mph)
    ENE
    10
    NE
    10
    NE
    10
    NE
    10
    NE
    13
    NE
    12
    NE
    11
    NE
    11
    Wind gust (mph)
    19
    19
    19
    22
    23
    21
    20
    20
    Visibility (description)
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    Humidity
    81%
    82%
    83%
    84%
    76%
    76%
    83%
    84%
    UV - - - 1 1 1 - -
    Wind direction and speed (mph)
    10
    Height of waves offshore (m)
    0.7
    Period of waves offshore (s)
    8
    Direction of waves offshore

    Tide times

    Saturday 20 December

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Saturday 20 December

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Saturday 20 December

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Saturday 20 December

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Sunday 21 December

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Sunday 21 December

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Sunday 21 December

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Sunday 21 December

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Monday 22 December

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Monday 22 December

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Monday 22 December

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Monday 22 December

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Tuesday 23 December

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Tuesday 23 December

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Tuesday 23 December

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Tuesday 23 December

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Wednesday 24 December

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Wednesday 24 December

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Wednesday 24 December

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Wednesday 24 December

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Thursday 25 December

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Thursday 25 December

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Thursday 25 December

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Thursday 25 December

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Friday 26 December

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Friday 26 December

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Friday 26 December

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Tide times

    Friday 26 December

    Tide times and heights are from Chesil Cove tidal station which is 1.9 miles away. So times may be different at this beach. What does this mean?

    Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

    Portland Harbour - Sandsfoot Castle (Beach) weather map

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    WARNING
    Flood warnings icon
    Flood warnings in force for England
    Flood warnings in force for England

    South West England weather forecast

    Headline:

    Further spells of rain and showers. Winds gradually easing.

    This Evening and Tonight:

    Outbreaks of heavy rain and blustery winds will spread eastwards through the evening. Drier overnight, with a mixture of clear spells and scattered showers. Winds tending to ease. Turning chilly where skies remain clear, with some fog patches forming. Minimum temperature 4 °C.

    Sunday:

    After a bright start, cloud and showery outbreaks of rain will move up from the south as the day progresses. Feeling chilly under cloudy skies. Staying breezy around the coasts. Maximum temperature 10 °C.

    Outlook for Monday to Wednesday:

    Often cloudy and dull through this period with some rain and drizzle possible at first. Gradually turning colder and possibly brighter with an easterly breeze developing.

    Updated:

    UK long range weather forecast

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