Llanberis (Gwynedd) weather

Forecast days

Sunny intervals changing to partly cloudy by early evening.
Sunrise iconSunrise:
Sunset iconSunset:
M UV
L Pollution
No pollen data.

    7 day forecast for Llanberis

    Today (16 September 2025)
    Time
    15:00
    16:00
    17:00
    18:00
    19:00
    20:00
    21:00
    22:00
    23:00
    Weather symbols Sunny intervals Sunny intervals Sunny intervals Light shower day Partly cloudy night Partly cloudy night Cloudy Light rain Light rain
    Chance of precipitation
    20%
    40%
    50%
    50%
    50%
    30%
    30%
    50%
    90%
    Temperature
    15°
    15°
    14°
    14°
    13°
    13°
    13°
    13°
    13°
    Feels like temperature (°C)
    13°
    13°
    13°
    12°
    12°
    12°
    12°
    11°
    11°
    Wind direction and speed
    WSW
    11
    WSW
    10
    WSW
    10
    WSW
    9
    SW
    8
    SW
    7
    SSW
    6
    SSW
    7
    SSW
    7
    Wind gust (mph)
    28
    27
    25
    23
    22
    19
    19
    19
    20
    Visibility
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    Humidity
    73%
    75%
    76%
    78%
    85%
    86%
    87%
    87%
    92%
    UV 2 2 1 1 1 - - - -
    Wednesday (17 September 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 Heavy rain Heavy rain Heavy rain Heavy rain Heavy rain Heavy rain Heavy rain Heavy rain Heavy rain Heavy rain Light rain Light rain Light rain Overcast Overcast Cloudy Cloudy Cloudy Sunny intervals Partly cloudy night Cloudy Cloudy Cloudy Light rain
    Chance of precipitation
    ≥95%
    ≥95%
    ≥95%
    ≥95%
    ≥95%
    ≥95%
    ≥95%
    ≥95%
    ≥95%
    90%
    80%
    70%
    50%
    40%
    40%
    40%
    40%
    40%
    40%
    40%
    40%
    40%
    40%
    50%
    Temperature (°C)
    12°
    12°
    12°
    12°
    13°
    14°
    14°
    15°
    15°
    16°
    16°
    16°
    17°
    17°
    17°
    17°
    17°
    16°
    16°
    16°
    15°
    15°
    15°
    15°
    Feels like temperature (°C)
    11°
    11°
    10°
    10°
    10°
    10°
    11°
    12°
    13°
    13°
    14°
    14°
    14°
    15°
    15°
    15°
    15°
    14°
    14°
    13°
    13°
    13°
    13°
    13°
    Wind direction and speed (mph)
    S
    8
    S
    10
    S
    12
    S
    14
    SSE
    16
    S
    19
    S
    19
    SSW
    17
    SSW
    17
    SW
    16
    SW
    16
    SW
    16
    SW
    16
    SW
    16
    SW
    15
    SW
    15
    SW
    15
    SW
    15
    SSW
    15
    SSW
    14
    SSW
    13
    SSW
    13
    SSW
    13
    SSW
    12
    Wind gust (mph)
    21
    23
    25
    28
    32
    37
    39
    39
    38
    36
    36
    35
    36
    36
    36
    35
    34
    33
    32
    32
    30
    29
    27
    26
    Visibility (description)
    M
    M
    M
    P
    P
    P
    P
    P
    P
    P
    P
    P
    P
    M
    M
    M
    G
    G
    M
    G
    G
    G
    M
    M
    Humidity
    93%
    96%
    96%
    96%
    96%
    95%
    95%
    96%
    98%
    99%
    99%
    99%
    99%
    96%
    93%
    93%
    92%
    93%
    94%
    95%
    95%
    96%
    96%
    96%
    UV - - - - - - 1 1 1 1 2 2 2 2 3 2 1 1 1 1 - - - -
    Thursday (18 September 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 Light rain Light rain Light rain Light rain Light rain Light rain Light rain Light rain Light rain Light rain Light rain Light rain Light rain Light rain Light rain Light rain Light rain Light rain Light rain Light rain
    Chance of precipitation
    60%
    70%
    80%
    80%
    90%
    90%
    80%
    80%
    80%
    80%
    80%
    70%
    70%
    70%
    80%
    80%
    70%
    70%
    70%
    70%
    70%
    70%
    80%
    70%
    Temperature (°C)
    15°
    15°
    15°
    15°
    15°
    16°
    16°
    16°
    16°
    16°
    16°
    17°
    17°
    17°
    17°
    17°
    17°
    17°
    17°
    17°
    16°
    16°
    16°
    16°
    Feels like temperature (°C)
    13°
    13°
    13°
    13°
    13°
    13°
    13°
    13°
    13°
    13°
    13°
    14°
    14°
    14°
    14°
    14°
    14°
    14°
    14°
    14°
    14°
    14°
    13°
    13°
    Wind direction and speed (mph)
    SSW
    12
    SSW
    12
    SSW
    13
    SSW
    13
    SSW
    14
    SSW
    15
    SSW
    17
    SSW
    18
    SSW
    19
    SSW
    19
    SSW
    19
    SSW
    19
    SSW
    19
    SSW
    18
    SSW
    18
    SSW
    18
    SSW
    18
    SSW
    18
    SSW
    18
    SSW
    18
    SSW
    17
    SSW
    17
    SSW
    17
    SSW
    18
    Wind gust (mph)
    26
    25
    25
    26
    24
    26
    35
    39
    41
    39
    39
    39
    39
    39
    39
    39
    39
    37
    38
    36
    36
    38
    38
    38
    Visibility (description)
    M
    M
    P
    P
    P
    P
    M
    M
    M
    M
    M
    M
    M
    M
    M
    M
    M
    G
    G
    G
    M
    G
    G
    G
    Humidity
    97%
    97%
    99%
    100%
    100%
    100%
    100%
    99%
    99%
    98%
    98%
    98%
    98%
    99%
    99%
    99%
    99%
    99%
    99%
    99%
    99%
    99%
    98%
    97%
    UV - - - - - - 1 1 1 1 1 1 2 2 1 1 1 1 1 1 - - - -
    Friday (19 September 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 Light rain Light rain Cloudy Cloudy Light rain Light rain Light rain Light rain Light rain Light rain Light rain Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy
    Chance of precipitation
    70%
    60%
    60%
    70%
    60%
    50%
    50%
    50%
    60%
    60%
    60%
    60%
    60%
    60%
    50%
    50%
    40%
    50%
    40%
    40%
    40%
    30%
    30%
    30%
    Temperature (°C)
    16°
    16°
    16°
    15°
    15°
    15°
    15°
    15°
    14°
    15°
    15°
    15°
    15°
    15°
    15°
    16°
    15°
    15°
    15°
    14°
    13°
    13°
    13°
    13°
    Feels like temperature (°C)
    13°
    13°
    13°
    13°
    13°
    13°
    13°
    13°
    13°
    13°
    13°
    14°
    14°
    14°
    14°
    14°
    14°
    14°
    13°
    13°
    13°
    12°
    12°
    12°
    Wind direction and speed (mph)
    SSW
    17
    SSW
    18
    SSW
    17
    SSW
    16
    SSW
    16
    SSW
    15
    SSW
    14
    SSW
    12
    SSW
    11
    SSW
    11
    SSW
    11
    SSW
    11
    SSW
    11
    SSW
    11
    SSW
    10
    SW
    10
    SW
    9
    SW
    9
    SSW
    8
    SSW
    7
    SSW
    6
    SSW
    6
    SSW
    6
    SSW
    6
    Wind gust (mph)
    36
    35
    31
    30
    28
    25
    22
    19
    19
    20
    21
    21
    21
    21
    19
    17
    17
    15
    15
    15
    14
    13
    12
    12
    Visibility (description)
    VG
    G
    G
    G
    G
    G
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    E
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    Humidity
    98%
    97%
    97%
    97%
    97%
    97%
    97%
    96%
    96%
    95%
    93%
    93%
    93%
    93%
    92%
    91%
    90%
    91%
    91%
    93%
    94%
    94%
    94%
    93%
    UV - - - - - - 1 1 1 1 2 2 3 2 2 2 1 1 1 1 - - - -
    Saturday (20 September 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 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 intervals Cloudy Light shower day Light shower day Light shower day Light shower day Light shower day Light shower day Light shower night Light shower night Light shower night Light shower night Heavy shower night
    Chance of precipitation
    40%
    40%
    30%
    40%
    40%
    30%
    30%
    30%
    30%
    30%
    30%
    40%
    50%
    50%
    50%
    50%
    50%
    60%
    50%
    50%
    60%
    70%
    70%
    70%
    Temperature (°C)
    13°
    13°
    13°
    12°
    12°
    12°
    12°
    12°
    12°
    12°
    13°
    14°
    14°
    14°
    14°
    14°
    14°
    13°
    13°
    12°
    11°
    11°
    11°
    11°
    Feels like temperature (°C)
    12°
    12°
    12°
    12°
    11°
    11°
    11°
    11°
    11°
    11°
    12°
    12°
    12°
    12°
    12°
    12°
    12°
    12°
    11°
    11°
    10°
    10°
    10°
    Wind direction and speed (mph)
    SSW
    5
    SSW
    6
    SSW
    5
    SW
    5
    SSW
    5
    SW
    6
    SW
    6
    SW
    6
    SW
    6
    WSW
    6
    W
    7
    WNW
    8
    WNW
    8
    WNW
    8
    NW
    8
    NW
    8
    NW
    8
    NNW
    8
    NNW
    8
    NNW
    7
    N
    6
    N
    6
    N
    7
    N
    7
    Wind gust (mph)
    12
    11
    10
    10
    11
    11
    11
    11
    12
    14
    16
    16
    15
    17
    19
    20
    19
    19
    15
    13
    13
    13
    14
    15
    Visibility (description)
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    E
    E
    E
    E
    E
    E
    E
    E
    VG
    VG
    VG
    VG
    VG
    VG
    Humidity
    93%
    93%
    92%
    91%
    90%
    90%
    91%
    92%
    91%
    87%
    85%
    81%
    78%
    77%
    78%
    80%
    78%
    80%
    83%
    85%
    87%
    86%
    88%
    88%
    UV - - - - - - 1 1 1 1 2 2 2 2 2 2 2 1 1 1 - - - -
    Sunday (21 September 2025)
    Time
    00:00
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Light shower night Light shower night Partly cloudy night Sunny intervals Cloudy Cloudy Cloudy Cloudy Cloudy
    Chance of precipitation
    70%
    60%
    50%
    30%
    30%
    30%
    20%
    20%
    10%
    Temperature (°C)
    10°
    10°
    11°
    11°
    12°
    10°
    Feels like temperature (°C)
    10°
    Wind direction and speed (mph)
    N
    7
    N
    7
    NNE
    7
    NNE
    8
    N
    9
    NNE
    9
    NNE
    10
    NNE
    7
    NNE
    6
    Wind gust (mph)
    15
    15
    16
    22
    25
    25
    24
    15
    10
    Visibility (description)
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    Humidity
    88%
    88%
    87%
    83%
    68%
    63%
    61%
    69%
    75%
    UV - - - 1 2 3 1 1 -
    Monday (22 September 2025)
    Time
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Cloudy Cloudy Cloudy Overcast Cloudy Sunny intervals Partly cloudy night Partly cloudy night
    Chance of precipitation
    10%
    10%
    <5%
    <5%
    <5%
    <5%
    <5%
    10%
    Temperature (°C)
    11°
    12°
    12°
    10°
    Feels like temperature (°C)
    10°
    11°
    Wind direction and speed (mph)
    NE
    5
    NNE
    5
    NNE
    4
    NE
    6
    NNE
    8
    NNE
    8
    NNE
    5
    NNE
    4
    Wind gust (mph)
    7
    6
    8
    15
    17
    15
    6
    4
    Visibility (description)
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    G
    Humidity
    79%
    83%
    83%
    67%
    61%
    61%
    76%
    85%
    UV - - 1 2 4 1 1 -

    UK video forecast

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    WARNING
    Flood alerts icon
    Flood alerts in force for Wales
    Flood alerts in force for Wales

    Wales weather forecast

    Headline:

    Remaining changeable with rain tonight.

    Today:

    A drier day albeit still the chance of a few isolated showers. Sunny spells are likely through the morning, but any sunshine turning hazy through the afternoon. Still breezy, though winds easing through the morning. Maximum temperature 17 °C.

    Tonight:

    Cloudy with showery rain affecting southern and western counties through the evening, before a band of heavier and more persistent spreads eastwards overnight. Increasingly windy by dawn. Minimum temperature 11 °C.

    Wednesday:

    Heavy, persistent rain clearing eastwards through the morning, though remaining mostly cloudy with outbreaks of patchy rain and drizzle throughout the day, perhaps turning heavy at times. Breezy. Maximum temperature 20 °C.

    Outlook for Thursday to Saturday:

    Remaining changeable with showers or longer spells of rain at times, though brighter interludes are possible. Often breezy. A little milder and more humid by the end of the week.

    Updated:

    UK long range weather forecast

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