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

Sunny intervals changing to cloudy by early evening.
🏖️ Beach safety today:

Enjoy the beach but be aware that the wind may affect your control of direction

• Beginner paddleboarders/kayakers should go on the water with an instructor or a more experienced person • novice surfers seek expert advice

Tide: Next low tide (2.1m) at

Sunrise iconSunrise:
Sunset iconSunset:
M UV
L Pollution

    7 day forecast for Porth Tywyn Mawr (Sandy Beach)

    Today (23 April 2025)
    Time
    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 Heavy rain Light rain Light rain Light rain Overcast Overcast Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy
    Chance of precipitation
    90%
    80%
    80%
    60%
    40%
    20%
    10%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    <5%
    10%
    10%
    10%
    10%
    <5%
    <5%
    <5%
    <5%
    Temperature
    10°
    10°
    11°
    12°
    13°
    13°
    14°
    14°
    15°
    14°
    13°
    13°
    12°
    11°
    10°
    10°
    Feels like temperature (°C)
    10°
    10°
    11°
    12°
    12°
    13°
    12°
    12°
    11°
    11°
    10°
    10°
    Wind direction and speed
    ESE
    17
    ESE
    16
    E
    16
    ESE
    15
    ESE
    13
    E
    12
    E
    11
    E
    12
    E
    13
    E
    14
    E
    14
    E
    13
    ENE
    13
    ENE
    12
    ENE
    11
    ENE
    11
    NE
    10
    NE
    9
    NE
    8
    NE
    6
    ENE
    5
    ENE
    5
    ENE
    4
    Wind gust (mph)
    33
    33
    32
    30
    27
    26
    25
    25
    24
    23
    21
    19
    18
    16
    15
    15
    15
    14
    13
    11
    10
    10
    9
    Visibility
    M
    G
    G
    VG
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    Humidity
    91%
    92%
    92%
    92%
    92%
    90%
    89%
    87%
    86%
    83%
    77%
    74%
    69%
    67%
    65%
    66%
    69%
    71%
    74%
    79%
    84%
    84%
    84%
    UV - - - - - 1 1 1 2 3 4 4 5 4 3 2 1 1 1 1 - - -
    Wind direction and speed
    17
    17
    16
    15
    13
    12
    11
    11
    12
    13
    13
    13
    12
    12
    11
    11
    10
    9
    8
    6
    5
    5
    4
    Height of waves offshore (m)
    0.6
    0.7
    0.7
    0.7
    0.6
    0.5
    0.5
    0.5
    0.5
    0.5
    0.5
    0.5
    0.4
    0.4
    0.3
    0.3
    0.3
    0.3
    0.3
    0.3
    0.2
    0.2
    0.2
    Period of waves offshore (s)
    7
    8
    8
    8
    8
    8
    8
    8
    8
    8
    8
    8
    8
    8
    8
    8
    8
    8
    8
    8
    8
    8
    8
    Direction of waves offshore
    Thursday (24 April 2025)
    Time
    00:00
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Cloudy Partly cloudy night Partly cloudy night Sunny intervals Sunny intervals Cloudy Cloudy Cloudy Overcast
    Chance of precipitation
    <5%
    10%
    10%
    10%
    30%
    40%
    30%
    30%
    40%
    Temperature (°C)
    10°
    10°
    13°
    14°
    14°
    14°
    11°
    Feels like temperature (°C)
    10°
    12°
    12°
    13°
    13°
    10°
    Wind direction and speed (mph)
    E
    4
    E
    4
    ESE
    4
    ESE
    4
    S
    6
    SSW
    8
    WSW
    7
    S
    6
    SE
    6
    Wind gust (mph)
    9
    10
    9
    15
    16
    14
    10
    10
    14
    Visibility (description)
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    Humidity
    84%
    84%
    86%
    85%
    70%
    68%
    71%
    77%
    87%
    UV - - - 1 3 4 2 1 -
    Wind direction and speed (mph)
    4
    4
    4
    4
    6
    9
    7
    6
    6
    Height of waves offshore (m)
    0.2
    0.2
    0.2
    0.2
    0.2
    0.2
    0.2
    0.2
    0.1
    Period of waves offshore (s)
    8
    8
    8
    6
    4
    5
    7
    7
    9
    Direction of waves offshore
    Friday (25 April 2025)
    Time
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Overcast Light rain Light rain Light rain Light rain Light rain Light rain Light rain
    Chance of precipitation
    50%
    50%
    70%
    70%
    70%
    80%
    80%
    70%
    Temperature (°C)
    11°
    11°
    11°
    12°
    13°
    13°
    12°
    11°
    Feels like temperature (°C)
    10°
    10°
    11°
    10°
    Wind direction and speed (mph)
    SSE
    7
    SSE
    8
    SSE
    9
    SSE
    13
    SSE
    14
    S
    12
    S
    11
    SSE
    10
    Wind gust (mph)
    17
    18
    22
    23
    22
    23
    21
    19
    Visibility (description)
    VG
    VG
    VG
    VG
    VG
    VG
    G
    VG
    Humidity
    88%
    88%
    87%
    89%
    84%
    84%
    91%
    92%
    UV - - 1 1 2 1 1 -
    Wind direction and speed (mph)
    7
    8
    9
    13
    14
    12
    11
    10
    Height of waves offshore (m)
    0.2
    0.2
    0.3
    0.5
    0.5
    0.4
    0.4
    0.4
    Period of waves offshore (s)
    13
    15
    2
    7
    10
    8
    8
    8
    Direction of waves offshore
    Saturday (26 April 2025)
    Time
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Light rain Overcast Sunny intervals Sunny intervals Sunny day Sunny day Partly cloudy night Cloudy
    Chance of precipitation
    60%
    40%
    20%
    10%
    <5%
    <5%
    10%
    20%
    Temperature (°C)
    10°
    10°
    11°
    12°
    13°
    12°
    11°
    Feels like temperature (°C)
    10°
    10°
    Wind direction and speed (mph)
    S
    10
    S
    9
    SSW
    8
    SSW
    9
    SSW
    11
    SSW
    14
    SSW
    15
    S
    13
    Wind gust (mph)
    21
    18
    16
    17
    19
    24
    25
    27
    Visibility (description)
    VG
    VG
    VG
    E
    E
    E
    E
    VG
    Humidity
    93%
    96%
    95%
    88%
    79%
    73%
    83%
    90%
    UV - - 1 3 5 2 1 -
    Wind direction and speed (mph)
    10
    9
    8
    10
    12
    15
    15
    14
    Height of waves offshore (m)
    0.5
    0.5
    0.4
    0.3
    0.2
    0.3
    0.4
    0.5
    Period of waves offshore (s)
    9
    13
    14
    14
    14
    14
    5
    4
    Direction of waves offshore
    Sunday (27 April 2025)
    Time
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Cloudy Overcast Cloudy Sunny intervals Sunny intervals Sunny intervals Partly cloudy night Cloudy
    Chance of precipitation
    30%
    30%
    20%
    10%
    10%
    10%
    10%
    10%
    Temperature (°C)
    10°
    10°
    10°
    13°
    14°
    14°
    13°
    12°
    Feels like temperature (°C)
    10°
    11°
    11°
    10°
    10°
    Wind direction and speed (mph)
    S
    15
    S
    15
    S
    16
    SSW
    17
    SSW
    20
    SSW
    20
    SSW
    17
    SSW
    15
    Wind gust (mph)
    28
    28
    32
    33
    34
    32
    28
    25
    Visibility (description)
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    Humidity
    92%
    94%
    92%
    87%
    80%
    78%
    83%
    88%
    UV - - 1 3 4 2 1 -
    Wind direction and speed (mph)
    15
    15
    15
    17
    19
    20
    17
    15
    Height of waves offshore (m)
    0.6
    0.8
    0.8
    0.8
    0.9
    Period of waves offshore (s)
    5
    5
    5
    6
    5
    Direction of waves offshore
    Monday (28 April 2025)
    Time
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Cloudy Cloudy Sunny intervals Sunny intervals Sunny day Sunny day Sunny day Clear night
    Chance of precipitation
    10%
    10%
    10%
    10%
    10%
    10%
    10%
    10%
    Temperature (°C)
    12°
    11°
    11°
    14°
    16°
    18°
    16°
    12°
    Feels like temperature (°C)
    10°
    12°
    14°
    15°
    14°
    10°
    Wind direction and speed (mph)
    S
    13
    S
    11
    S
    9
    S
    11
    S
    13
    SSW
    13
    SSW
    10
    S
    9
    Wind gust (mph)
    19
    19
    19
    20
    20
    17
    11
    7
    Visibility (description)
    G
    G
    G
    VG
    VG
    VG
    VG
    VG
    Humidity
    92%
    91%
    90%
    79%
    67%
    61%
    72%
    86%
    UV - - 1 2 4 2 1 -
    Wind direction and speed (mph)
    13
    Height of waves offshore (m)
    Period of waves offshore (s)
    Direction of waves offshore
    Tuesday (29 April 2025)
    Time
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Clear night Partly cloudy night Sunny intervals Sunny intervals Sunny day Sunny day Sunny day Clear night
    Chance of precipitation
    10%
    10%
    10%
    10%
    10%
    10%
    10%
    10%
    Temperature (°C)
    11°
    10°
    11°
    14°
    16°
    16°
    14°
    11°
    Feels like temperature (°C)
    10°
    13°
    14°
    14°
    12°
    Wind direction and speed (mph)
    S
    8
    S
    7
    S
    7
    SW
    10
    NW
    11
    NNW
    12
    N
    11
    NNE
    10
    Wind gust (mph)
    7
    6
    10
    14
    16
    15
    10
    8
    Visibility (description)
    G
    G
    VG
    VG
    VG
    VG
    VG
    VG
    Humidity
    87%
    90%
    87%
    72%
    68%
    68%
    74%
    87%
    UV - - 1 3 5 2 1 -
    Wind direction and speed (mph)
    Height of waves offshore (m)
    Period of waves offshore (s)
    Direction of waves offshore

    Tide times

    Wednesday 23 April

    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 23 April

    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 23 April

    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 23 April

    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 24 April

    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 24 April

    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 24 April

    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 24 April

    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 25 April

    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 25 April

    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 25 April

    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 25 April

    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 26 April

    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 26 April

    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 26 April

    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 26 April

    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 27 April

    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 27 April

    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 27 April

    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 27 April

    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 28 April

    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 28 April

    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 28 April

    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 28 April

    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 29 April

    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 29 April

    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 29 April

    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 29 April

    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.

    UK video forecast

    Porth Tywyn Mawr (Sandy Beach) weather map

    View the weather with our interactive map

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    Wales weather forecast

    Headline:

    Rain clearing on Wednesday.

    This Evening and Tonight:

    A band of heavy rain will move east across all areas before midnight, clearing to clear spells and sharp showers through the early hours. Gusty winds, these easing before dawn. Milder than Monday night. Minimum temperature 5 °C.

    Wednesday:

    A cloudy start for many on Wednesday with further spells of rain or sharp showers, these soon clearing with sunny spells developing into the afternoon. Feeling warm in the sunshine. Maximum temperature 16 °C.

    Outlook for Thursday to Saturday:

    Largely settled on Thursday with variable amounts of cloud and a few showers. Turning increasingly cloudy from Friday, as rain moves slowly but erratically in from the west. Normal temperatures.

    Updated:

    UK long range weather forecast

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