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Cemlyn (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

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

Tide: Next low tide (1.8m) at

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

    7 day forecast for Cemlyn (Beach)

    Today (18 December 2025)
    Time
    23:00
    Weather symbols Clear night
    Chance of precipitation
    <5%
    Temperature
    Feels like temperature (°C)
    Wind direction and speed
    SW
    20
    Wind gust (mph)
    43
    Visibility
    E
    Humidity
    76%
    UV -
    Wind direction and speed
    20
    Height of waves offshore (m)
    1.4
    Period of waves offshore (s)
    6
    Direction of waves offshore
    Friday (19 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 Clear night Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny day Sunny day Sunny day Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night Light shower night
    Chance of precipitation
    <5%
    <5%
    10%
    10%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    10%
    20%
    40%
    40%
    40%
    60%
    Temperature (°C)
    Feels like temperature (°C)
    Wind direction and speed (mph)
    SW
    21
    SW
    22
    SW
    24
    SW
    25
    SW
    25
    SW
    24
    SW
    23
    SW
    23
    SW
    22
    SW
    21
    SW
    21
    SW
    21
    SW
    21
    WSW
    20
    SW
    19
    SW
    18
    SW
    16
    SW
    16
    SW
    15
    SW
    15
    SW
    15
    SSW
    14
    SSW
    12
    SSW
    12
    Wind gust (mph)
    45
    49
    50
    50
    48
    47
    45
    44
    43
    41
    40
    39
    38
    37
    35
    34
    34
    33
    33
    34
    34
    33
    30
    30
    Visibility (description)
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    Humidity
    75%
    75%
    76%
    76%
    79%
    81%
    83%
    81%
    82%
    79%
    78%
    76%
    75%
    75%
    75%
    76%
    76%
    75%
    74%
    74%
    74%
    75%
    78%
    82%
    UV - - - - - - - - 1 1 1 1 1 1 1 1 - - - - - - - -
    Wind direction and speed (mph)
    21
    22
    24
    25
    25
    24
    23
    23
    22
    21
    21
    21
    21
    20
    19
    18
    16
    16
    15
    15
    15
    14
    12
    12
    Height of waves offshore (m)
    1.4
    1.4
    1.4
    1.3
    1.3
    1.2
    1.2
    1.3
    1.3
    1.3
    1.4
    1.4
    1.5
    1.4
    1.4
    1.3
    1.2
    1.0
    0.9
    0.9
    0.9
    0.9
    0.9
    0.8
    Period of waves offshore (s)
    6
    7
    7
    7
    8
    8
    8
    9
    9
    9
    6
    6
    6
    6
    6
    6
    6
    6
    5
    5
    5
    5
    5
    10
    Direction of waves offshore
    Saturday (20 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 Light shower night Light shower night Partly cloudy night Partly cloudy night Clear night Clear night Clear night Clear night Sunny day Sunny day Sunny day Sunny day Sunny intervals Sunny intervals Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy
    Chance of precipitation
    60%
    70%
    60%
    40%
    30%
    10%
    10%
    <5%
    <5%
    <5%
    <5%
    10%
    10%
    10%
    20%
    20%
    20%
    30%
    30%
    30%
    30%
    40%
    40%
    40%
    Temperature (°C)
    Feels like temperature (°C)
    Wind direction and speed (mph)
    S
    11
    S
    11
    S
    12
    SSE
    13
    SSE
    15
    SSE
    15
    SSE
    15
    SSE
    15
    SSE
    15
    SSE
    16
    SSE
    16
    SSE
    17
    SSE
    18
    SSE
    18
    SSE
    17
    SE
    16
    SE
    15
    SE
    15
    SE
    14
    SE
    14
    SE
    13
    SE
    12
    SE
    11
    SE
    11
    Wind gust (mph)
    30
    31
    32
    33
    34
    34
    33
    34
    34
    35
    36
    36
    36
    36
    36
    36
    36
    37
    37
    35
    33
    31
    29
    30
    Visibility (description)
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    VG
    VG
    VG
    VG
    Humidity
    85%
    87%
    89%
    90%
    91%
    87%
    85%
    85%
    84%
    84%
    80%
    76%
    75%
    75%
    75%
    75%
    76%
    77%
    77%
    77%
    78%
    78%
    81%
    83%
    UV - - - - - - - - 1 1 1 1 1 1 1 1 - - - - - - - -
    Wind direction and speed (mph)
    11
    11
    12
    13
    15
    15
    15
    15
    15
    16
    16
    17
    18
    18
    17
    16
    15
    15
    14
    14
    13
    12
    11
    11
    Height of waves offshore (m)
    0.9
    0.8
    0.7
    0.6
    0.6
    0.5
    0.6
    0.7
    0.7
    0.8
    0.8
    0.8
    0.8
    0.8
    0.7
    0.6
    0.5
    0.5
    0.6
    0.8
    0.9
    1.0
    1.0
    0.9
    Period of waves offshore (s)
    6
    6
    6
    7
    8
    8
    8
    8
    8
    8
    8
    8
    8
    8
    9
    9
    9
    10
    10
    10
    11
    11
    11
    11
    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 Cloudy Cloudy Cloudy Cloudy Overcast Light rain Light rain Light rain Light rain Overcast Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Partly cloudy night Cloudy Cloudy Cloudy Cloudy Cloudy Overcast
    Chance of precipitation
    40%
    30%
    30%
    40%
    50%
    50%
    50%
    60%
    50%
    50%
    40%
    30%
    30%
    30%
    30%
    30%
    30%
    30%
    30%
    30%
    40%
    40%
    40%
    50%
    Temperature (°C)
    Feels like temperature (°C)
    Wind direction and speed (mph)
    SE
    11
    ESE
    11
    ESE
    11
    ESE
    11
    ESE
    12
    ESE
    12
    E
    13
    E
    13
    E
    13
    E
    13
    E
    13
    E
    13
    E
    14
    E
    14
    E
    14
    E
    14
    E
    14
    E
    14
    E
    13
    E
    13
    E
    13
    E
    13
    E
    13
    E
    12
    Wind gust (mph)
    30
    29
    28
    27
    26
    26
    26
    27
    28
    28
    26
    27
    26
    26
    26
    26
    24
    24
    24
    24
    23
    23
    21
    19
    Visibility (description)
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    G
    G
    G
    G
    G
    G
    G
    G
    Humidity
    85%
    87%
    87%
    87%
    90%
    90%
    92%
    92%
    92%
    92%
    92%
    91%
    91%
    91%
    91%
    91%
    92%
    92%
    92%
    93%
    93%
    93%
    95%
    94%
    UV - - - - - - - - 1 1 1 1 1 1 1 1 - - - - - - - -
    Wind direction and speed (mph)
    11
    11
    11
    11
    12
    12
    13
    13
    13
    13
    13
    13
    14
    14
    14
    14
    14
    14
    13
    13
    13
    13
    13
    12
    Height of waves offshore (m)
    0.9
    0.8
    0.7
    0.6
    0.6
    0.5
    0.5
    0.7
    0.7
    0.6
    0.6
    0.6
    0.5
    0.5
    0.6
    0.6
    0.6
    0.6
    0.6
    0.5
    0.5
    0.5
    0.5
    0.5
    Period of waves offshore (s)
    11
    11
    11
    11
    5
    5
    5
    10
    10
    10
    10
    13
    16
    16
    16
    10
    10
    4
    4
    4
    4
    4
    4
    4
    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 Overcast Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Sunny intervals Sunny intervals Sunny intervals Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night
    Chance of precipitation
    50%
    40%
    30%
    30%
    30%
    30%
    30%
    30%
    30%
    30%
    20%
    20%
    20%
    10%
    10%
    10%
    10%
    10%
    20%
    10%
    10%
    10%
    10%
    <5%
    Temperature (°C)
    Feels like temperature (°C)
    Wind direction and speed (mph)
    E
    12
    E
    12
    E
    11
    E
    11
    E
    11
    E
    11
    E
    11
    E
    12
    E
    12
    E
    12
    E
    13
    E
    13
    ESE
    13
    ESE
    13
    ESE
    14
    E
    13
    ESE
    13
    ESE
    12
    ESE
    12
    ESE
    11
    ESE
    11
    ESE
    11
    ESE
    12
    ESE
    11
    Wind gust (mph)
    18
    17
    16
    15
    15
    15
    17
    19
    19
    20
    21
    21
    20
    19
    19
    19
    19
    20
    21
    21
    21
    19
    18
    19
    Visibility (description)
    G
    G
    G
    G
    G
    G
    G
    G
    G
    G
    G
    G
    G
    G
    G
    G
    G
    G
    M
    M
    G
    G
    G
    G
    Humidity
    94%
    95%
    95%
    95%
    94%
    94%
    93%
    93%
    93%
    92%
    91%
    90%
    89%
    88%
    88%
    90%
    91%
    91%
    92%
    92%
    92%
    91%
    92%
    91%
    UV - - - - - - - - 1 1 1 1 1 1 1 1 1 - - - - - - -
    Wind direction and speed (mph)
    12
    12
    11
    11
    11
    11
    11
    12
    12
    12
    13
    13
    13
    13
    14
    13
    13
    12
    12
    11
    11
    11
    12
    11
    Height of waves offshore (m)
    0.5
    0.5
    0.5
    0.5
    0.5
    0.5
    0.5
    0.6
    0.6
    0.6
    0.6
    0.6
    0.6
    0.6
    0.6
    0.7
    0.7
    0.7
    0.6
    0.6
    0.5
    0.5
    0.5
    0.5
    Period of waves offshore (s)
    4
    4
    4
    4
    4
    4
    4
    4
    5
    5
    5
    5
    5
    5
    5
    5
    5
    5
    5
    5
    5
    5
    5
    5
    Direction of waves offshore
    Tuesday (23 December 2025)
    Time
    00:00
    03:00
    06:00
    09:00
    12:00
    15:00
    18:00
    21:00
    Weather symbols Cloudy Cloudy Overcast Cloudy Sunny intervals Overcast Overcast Overcast
    Chance of precipitation
    10%
    10%
    10%
    <5%
    <5%
    <5%
    <5%
    <5%
    Temperature (°C)
    Feels like temperature (°C)
    Wind direction and speed (mph)
    ESE
    11
    E
    10
    E
    11
    E
    11
    ENE
    14
    ENE
    14
    ENE
    14
    E
    14
    Wind gust (mph)
    15
    11
    12
    13
    16
    17
    19
    18
    Visibility (description)
    G
    G
    G
    G
    G
    G
    G
    G
    Humidity
    89%
    89%
    90%
    89%
    84%
    85%
    85%
    86%
    UV - - - 1 1 1 - -
    Wind direction and speed (mph)
    11
    10
    11
    11
    14
    14
    14
    14
    Height of waves offshore (m)
    0.5
    0.6
    0.7
    0.7
    0.6
    0.6
    0.7
    0.7
    Period of waves offshore (s)
    5
    5
    5
    5
    5
    5
    5
    5
    Direction of waves offshore
    Wednesday (24 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
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    Temperature (°C)
    Feels like temperature (°C)
    Wind direction and speed (mph)
    ENE
    14
    ENE
    14
    ENE
    14
    ENE
    14
    ENE
    15
    ENE
    15
    ENE
    14
    ENE
    14
    Wind gust (mph)
    19
    20
    19
    20
    23
    22
    19
    17
    Visibility (description)
    G
    G
    G
    G
    G
    G
    G
    VG
    Humidity
    87%
    84%
    84%
    84%
    81%
    81%
    82%
    84%
    UV - - - 1 1 1 - -
    Wind direction and speed (mph)
    14
    Height of waves offshore (m)
    0.9
    Period of waves offshore (s)
    5
    Direction of waves offshore

    Tide times

    Thursday 18 December

    Tide times and heights are from Cemaes Bay tidal station which is 2.5 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 18 December

    Tide times and heights are from Cemaes Bay tidal station which is 2.5 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 18 December

    Tide times and heights are from Cemaes Bay tidal station which is 2.5 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 18 December

    Tide times and heights are from Cemaes Bay tidal station which is 2.5 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 19 December

    Tide times and heights are from Cemaes Bay tidal station which is 2.5 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 19 December

    Tide times and heights are from Cemaes Bay tidal station which is 2.5 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 19 December

    Tide times and heights are from Cemaes Bay tidal station which is 2.5 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 19 December

    Tide times and heights are from Cemaes Bay tidal station which is 2.5 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 Cemaes Bay tidal station which is 2.5 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 Cemaes Bay tidal station which is 2.5 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 Cemaes Bay tidal station which is 2.5 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 Cemaes Bay tidal station which is 2.5 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 Cemaes Bay tidal station which is 2.5 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 Cemaes Bay tidal station which is 2.5 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 Cemaes Bay tidal station which is 2.5 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 Cemaes Bay tidal station which is 2.5 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 Cemaes Bay tidal station which is 2.5 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 Cemaes Bay tidal station which is 2.5 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 Cemaes Bay tidal station which is 2.5 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 Cemaes Bay tidal station which is 2.5 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 Cemaes Bay tidal station which is 2.5 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 Cemaes Bay tidal station which is 2.5 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 Cemaes Bay tidal station which is 2.5 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 Cemaes Bay tidal station which is 2.5 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 Cemaes Bay tidal station which is 2.5 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 Cemaes Bay tidal station which is 2.5 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 Cemaes Bay tidal station which is 2.5 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 Cemaes Bay tidal station which is 2.5 miles away. So times may be different at this beach. What does this mean?

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

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    WARNING
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    Flood warnings in force for Wales
    Flood warnings in force for Wales

    Wales weather forecast

    Headline:

    Sunny spells and a chance of showers on Friday.

    This Evening and Tonight:

    Slightly drier for some at first but another band of rain or showers will quickly spread eastwards this evening, with occasional heavy bursts. Clearer skies following overnight with scattered showers. Turning colder than last night but staying generally frost free. Minimum temperature 4 °C.

    Friday:

    Friday brings a mixture of sunshine and scattered showers, these locally heavy. Fewer showers by the afternoon. Quite mild again but feeling cooler in the breeze, although winds easing later. Maximum temperature 11 °C.

    Outlook for Saturday to Monday:

    After a mostly fine start, turning wet and windy in the west later on Saturday. Winds easing thereafter but often cloudy on Sunday and Monday with occasional rain or drizzle.

    Updated:

    UK long range weather forecast

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