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Porth Tywyn Mawr (Sandy Beach) (Isle of Anglesey) 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

Cloudy changing to light rain by lunchtime.
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 (1.5m) at

Sunrise iconSunrise:
Sunset iconSunset:
H UV
L Pollution

    7 day forecast for Porth Tywyn Mawr (Sandy Beach)

    Today (8 June 2025)
    Time
    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 Sunny intervals Cloudy Overcast Light rain Overcast Overcast Cloudy Cloudy Cloudy Sunny intervals Sunny intervals Partly cloudy night Partly cloudy night
    Chance of precipitation
    20%
    10%
    10%
    50%
    60%
    50%
    40%
    30%
    30%
    30%
    10%
    10%
    10%
    <5%
    Temperature
    13°
    13°
    14°
    14°
    14°
    14°
    14°
    15°
    15°
    14°
    14°
    14°
    13°
    13°
    Feels like temperature (°C)
    10°
    11°
    11°
    12°
    12°
    12°
    12°
    12°
    13°
    13°
    13°
    13°
    12°
    12°
    Wind direction and speed
    W
    15
    W
    15
    WSW
    14
    WSW
    13
    SW
    14
    SW
    14
    SW
    14
    SW
    13
    SW
    11
    SW
    10
    WSW
    9
    WSW
    7
    WSW
    7
    W
    7
    Wind gust (mph)
    27
    25
    23
    23
    24
    24
    24
    22
    20
    19
    16
    15
    15
    15
    Visibility
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    VG
    E
    Humidity
    78%
    78%
    76%
    75%
    78%
    80%
    79%
    78%
    80%
    79%
    80%
    84%
    84%
    84%
    UV 4 5 6 6 6 5 4 2 1 1 1 1 - -
    Wind direction and speed
    15
    14
    13
    13
    13
    14
    14
    13
    12
    10
    9
    7
    6
    7
    Height of waves offshore (m)
    0.7
    0.7
    0.7
    0.7
    0.6
    0.6
    0.6
    0.5
    0.5
    0.4
    0.4
    0.4
    0.4
    0.4
    Period of waves offshore (s)
    4
    4
    4
    4
    5
    5
    5
    4
    4
    4
    5
    5
    6
    6
    Direction of waves offshore
    Monday (9 June 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 Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Cloudy Cloudy Cloudy Cloudy Cloudy Light rain Light rain Heavy rain Heavy rain Heavy rain Heavy rain Light rain Light rain Overcast
    Chance of precipitation
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    10%
    20%
    30%
    20%
    30%
    50%
    70%
    80%
    80%
    90%
    80%
    60%
    60%
    50%
    Temperature (°C)
    13°
    12°
    12°
    12°
    11°
    11°
    12°
    13°
    13°
    13°
    14°
    14°
    14°
    14°
    14°
    14°
    13°
    13°
    13°
    13°
    14°
    14°
    14°
    14°
    Feels like temperature (°C)
    11°
    11°
    11°
    10°
    10°
    10°
    11°
    12°
    12°
    12°
    12°
    12°
    11°
    11°
    11°
    11°
    10°
    10°
    10°
    10°
    10°
    11°
    11°
    11°
    Wind direction and speed (mph)
    W
    7
    W
    8
    WNW
    8
    WNW
    7
    W
    6
    W
    6
    W
    6
    WSW
    6
    WSW
    7
    SW
    8
    SW
    10
    SW
    12
    SW
    13
    SSW
    14
    SSW
    15
    SSW
    16
    SSW
    17
    SSW
    18
    SSW
    18
    SSW
    19
    SSW
    19
    SSW
    19
    SW
    19
    SW
    18
    Wind gust (mph)
    16
    16
    15
    15
    14
    13
    13
    14
    15
    16
    19
    22
    24
    25
    27
    30
    32
    34
    35
    36
    36
    36
    33
    32
    Visibility (description)
    E
    E
    E
    E
    VG
    VG
    VG
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    M
    M
    M
    G
    G
    G
    Humidity
    85%
    84%
    85%
    86%
    88%
    89%
    86%
    79%
    76%
    75%
    74%
    74%
    74%
    76%
    76%
    77%
    81%
    86%
    92%
    95%
    96%
    96%
    96%
    96%
    UV - - - - 1 1 1 1 2 2 3 3 4 4 4 3 2 1 1 1 1 1 - -
    Wind direction and speed (mph)
    7
    8
    8
    7
    6
    6
    5
    6
    7
    8
    10
    12
    13
    14
    15
    16
    17
    18
    18
    19
    19
    19
    19
    18
    Height of waves offshore (m)
    0.3
    0.3
    0.3
    0.3
    0.4
    0.4
    0.4
    0.3
    0.3
    0.3
    0.3
    0.3
    0.4
    0.4
    0.5
    0.4
    0.5
    0.5
    0.5
    0.7
    0.8
    0.9
    0.9
    0.9
    Period of waves offshore (s)
    6
    3
    3
    3
    4
    4
    4
    4
    4
    3
    6
    6
    3
    3
    3
    3
    3
    3
    5
    6
    6
    6
    6
    6
    Direction of waves offshore
    Tuesday (10 June 2025)
    Time
    00:00
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Overcast Overcast Overcast Overcast Sunny intervals Sunny intervals Sunny intervals Cloudy Overcast
    Chance of precipitation
    40%
    40%
    40%
    40%
    10%
    <5%
    <5%
    <5%
    <5%
    Temperature (°C)
    14°
    14°
    14°
    13°
    14°
    15°
    16°
    15°
    13°
    Feels like temperature (°C)
    11°
    11°
    12°
    12°
    12°
    14°
    15°
    14°
    12°
    Wind direction and speed (mph)
    SW
    17
    SW
    16
    WSW
    13
    W
    10
    NW
    9
    WNW
    9
    W
    7
    WSW
    6
    S
    5
    Wind gust (mph)
    30
    29
    24
    20
    13
    10
    9
    9
    8
    Visibility (description)
    VG
    VG
    VG
    VG
    E
    E
    E
    E
    VG
    Humidity
    96%
    95%
    95%
    93%
    83%
    72%
    69%
    71%
    91%
    UV - - 1 1 4 6 4 1 -
    Wind direction and speed (mph)
    17
    16
    13
    10
    9
    8
    7
    6
    4
    Height of waves offshore (m)
    0.9
    0.9
    0.6
    0.6
    0.6
    0.4
    0.4
    0.4
    0.3
    Period of waves offshore (s)
    6
    6
    4
    4
    4
    4
    4
    4
    5
    Direction of waves offshore
    Wednesday (11 June 2025)
    Time
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Partly cloudy night Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Cloudy
    Chance of precipitation
    <5%
    <5%
    <5%
    <5%
    <5%
    10%
    30%
    30%
    Temperature (°C)
    12°
    12°
    14°
    16°
    17°
    18°
    18°
    16°
    Feels like temperature (°C)
    11°
    11°
    13°
    15°
    16°
    17°
    17°
    15°
    Wind direction and speed (mph)
    SSE
    5
    SSE
    7
    SSE
    7
    SSW
    9
    SW
    9
    W
    8
    NE
    7
    E
    6
    Wind gust (mph)
    10
    12
    13
    14
    12
    12
    14
    18
    Visibility (description)
    VG
    VG
    VG
    E
    VG
    VG
    VG
    VG
    Humidity
    92%
    93%
    84%
    74%
    68%
    67%
    73%
    84%
    UV - 1 1 4 6 4 1 -
    Wind direction and speed (mph)
    6
    7
    7
    9
    9
    8
    7
    6
    Height of waves offshore (m)
    0.2
    0.2
    0.1
    0.1
    0.1
    0.1
    0.1
    0.1
    Period of waves offshore (s)
    4
    5
    5
    5
    9
    9
    11
    11
    Direction of waves offshore
    Thursday (12 June 2025)
    Time
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Cloudy Cloudy Cloudy Cloudy Sunny intervals Sunny intervals Cloudy Overcast
    Chance of precipitation
    50%
    50%
    40%
    40%
    40%
    30%
    20%
    20%
    Temperature (°C)
    17°
    17°
    16°
    17°
    18°
    19°
    18°
    16°
    Feels like temperature (°C)
    16°
    16°
    14°
    15°
    16°
    16°
    15°
    15°
    Wind direction and speed (mph)
    E
    7
    SE
    10
    SSE
    11
    S
    14
    S
    15
    S
    16
    S
    15
    S
    11
    Wind gust (mph)
    24
    25
    24
    23
    25
    26
    25
    21
    Visibility (description)
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    Humidity
    80%
    81%
    87%
    82%
    77%
    78%
    82%
    90%
    UV - 1 1 2 5 4 1 -
    Wind direction and speed (mph)
    7
    9
    12
    14
    15
    16
    15
    12
    Height of waves offshore (m)
    0.1
    0.2
    0.3
    0.3
    0.5
    0.5
    0.5
    0.6
    Period of waves offshore (s)
    11
    5
    4
    2
    3
    4
    5
    5
    Direction of waves offshore
    Friday (13 June 2025)
    Time
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Overcast Overcast Cloudy Sunny intervals Sunny intervals Sunny intervals Sunny intervals Partly cloudy night
    Chance of precipitation
    20%
    30%
    30%
    40%
    30%
    30%
    20%
    30%
    Temperature (°C)
    16°
    15°
    15°
    18°
    19°
    19°
    17°
    15°
    Feels like temperature (°C)
    14°
    14°
    14°
    15°
    16°
    16°
    15°
    13°
    Wind direction and speed (mph)
    S
    11
    S
    10
    S
    10
    S
    14
    SSW
    15
    SSW
    14
    SSW
    13
    S
    10
    Wind gust (mph)
    20
    19
    23
    24
    26
    19
    15
    12
    Visibility (description)
    G
    G
    G
    G
    VG
    VG
    VG
    G
    Humidity
    90%
    92%
    90%
    81%
    74%
    72%
    76%
    89%
    UV - 1 1 4 7 4 1 -
    Wind direction and speed (mph)
    11
    11
    12
    13
    15
    14
    13
    9
    Height of waves offshore (m)
    0.9
    0.7
    0.5
    0.4
    0.3
    0.3
    0.3
    0.4
    Period of waves offshore (s)
    5
    6
    7
    7
    8
    8
    8
    8
    Direction of waves offshore
    Saturday (14 June 2025)
    Time
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Partly cloudy night Cloudy Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Partly cloudy night
    Chance of precipitation
    30%
    30%
    30%
    30%
    20%
    10%
    10%
    20%
    Temperature (°C)
    14°
    13°
    14°
    16°
    17°
    17°
    16°
    14°
    Feels like temperature (°C)
    13°
    12°
    12°
    14°
    15°
    15°
    14°
    12°
    Wind direction and speed (mph)
    SSW
    9
    SW
    8
    W
    9
    W
    11
    W
    13
    WSW
    13
    WSW
    13
    SW
    10
    Wind gust (mph)
    9
    8
    13
    18
    20
    19
    15
    12
    Visibility (description)
    G
    G
    G
    G
    VG
    VG
    VG
    G
    Humidity
    93%
    92%
    89%
    82%
    74%
    72%
    76%
    88%
    UV - 1 1 4 6 4 1 -
    Wind direction and speed (mph)
    9
    Height of waves offshore (m)
    0.4
    Period of waves offshore (s)
    8
    Direction of waves offshore

    Tide times

    Sunday 8 June

    Tide times and heights are from Holyhead tidal station which is 2.3 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 8 June

    Tide times and heights are from Holyhead tidal station which is 2.3 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 8 June

    Tide times and heights are from Holyhead tidal station which is 2.3 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 8 June

    Tide times and heights are from Holyhead tidal station which is 2.3 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 9 June

    Tide times and heights are from Holyhead tidal station which is 2.3 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 9 June

    Tide times and heights are from Holyhead tidal station which is 2.3 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 9 June

    Tide times and heights are from Holyhead tidal station which is 2.3 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 9 June

    Tide times and heights are from Holyhead tidal station which is 2.3 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 10 June

    Tide times and heights are from Holyhead tidal station which is 2.3 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 10 June

    Tide times and heights are from Holyhead tidal station which is 2.3 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 10 June

    Tide times and heights are from Holyhead tidal station which is 2.3 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 10 June

    Tide times and heights are from Holyhead tidal station which is 2.3 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 11 June

    Tide times and heights are from Holyhead tidal station which is 2.3 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 11 June

    Tide times and heights are from Holyhead tidal station which is 2.3 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 11 June

    Tide times and heights are from Holyhead tidal station which is 2.3 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 11 June

    Tide times and heights are from Holyhead tidal station which is 2.3 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 12 June

    Tide times and heights are from Holyhead tidal station which is 2.3 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 12 June

    Tide times and heights are from Holyhead tidal station which is 2.3 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 12 June

    Tide times and heights are from Holyhead tidal station which is 2.3 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 12 June

    Tide times and heights are from Holyhead tidal station which is 2.3 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 13 June

    Tide times and heights are from Holyhead tidal station which is 2.3 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 13 June

    Tide times and heights are from Holyhead tidal station which is 2.3 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 13 June

    Tide times and heights are from Holyhead tidal station which is 2.3 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 13 June

    Tide times and heights are from Holyhead tidal station which is 2.3 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 14 June

    Tide times and heights are from Holyhead tidal station which is 2.3 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 14 June

    Tide times and heights are from Holyhead tidal station which is 2.3 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 14 June

    Tide times and heights are from Holyhead tidal station which is 2.3 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 14 June

    Tide times and heights are from Holyhead tidal station which is 2.3 miles away. So times may be different at this beach. What does this mean?

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

    Porth Tywyn Mawr (Sandy Beach) weather map

    View the weather with our interactive map

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    Wales weather forecast

    Headline:

    Drier than Saturday with scattered showers and sunny spells.

    Today:

    A drier day than on Saturday with all areas seeing some sunshine at times. Scattered showers developing and becoming fairly widespread during the afternoon, especially across the north, but some places will remain dry. Breezy but feeling a little warmer. Maximum temperature 17 °C.

    Tonight:

    Showers mostly fading during the evening, although some may linger across north Wales into the early hours. Clear spells developing with light winds. Minimum temperature 6 °C.

    Monday:

    A dry and bright start on Monday but skies will cloud over from the west during the afternoon, with a little light drizzle over the high ground later. Strengthening winds. Maximum temperature 17 °C.

    Outlook for Tuesday to Thursday:

    Often cloudy on Tuesday with further outbreaks of light rain. Turning warmer from mid week with sunny spells and an increasing risk of thundery showers, especially on Thursday.

    Updated:

    UK long range weather forecast

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