Llanelli (Carmarthenshire) weather

Forecast days

Light rain changing to overcast by late morning.
Sunrise iconSunrise:
Sunset iconSunset:
M UV
L Pollution
No pollen data.

    7 day forecast for Llanelli

    Today (18 September 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 Overcast Light rain Light rain Light rain Light rain Light rain Light rain Light rain Light rain Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast
    Chance of precipitation
    50%
    70%
    90%
    90%
    90%
    90%
    80%
    70%
    60%
    50%
    30%
    20%
    20%
    10%
    10%
    20%
    20%
    10%
    10%
    10%
    20%
    10%
    10%
    Temperature
    16°
    16°
    16°
    16°
    16°
    17°
    17°
    17°
    17°
    17°
    18°
    18°
    18°
    19°
    19°
    19°
    19°
    18°
    18°
    18°
    18°
    18°
    17°
    Feels like temperature (°C)
    15°
    15°
    16°
    16°
    16°
    16°
    16°
    15°
    15°
    15°
    16°
    16°
    16°
    16°
    16°
    16°
    16°
    16°
    16°
    16°
    16°
    16°
    16°
    Wind direction and speed
    WSW
    7
    SW
    7
    SW
    7
    SW
    8
    SW
    9
    SW
    10
    SW
    11
    SW
    12
    SW
    14
    SW
    15
    SW
    16
    SW
    16
    SW
    16
    SW
    16
    SW
    16
    SW
    16
    SW
    16
    SW
    15
    SSW
    14
    SSW
    13
    SSW
    12
    SSW
    12
    SSW
    11
    Wind gust (mph)
    17
    15
    17
    19
    21
    23
    25
    28
    32
    33
    33
    33
    33
    34
    34
    34
    32
    31
    29
    29
    29
    30
    29
    Visibility
    M
    M
    M
    P
    P
    P
    M
    M
    M
    M
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    Humidity
    96%
    98%
    99%
    99%
    99%
    99%
    99%
    99%
    99%
    98%
    95%
    93%
    91%
    89%
    87%
    87%
    88%
    89%
    90%
    90%
    89%
    90%
    91%
    UV - - - - - 1 1 1 1 1 2 2 2 2 2 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 Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Light rain Light rain Light rain Light rain Light rain Light rain Light rain Light rain
    Chance of precipitation
    10%
    10%
    10%
    20%
    20%
    10%
    10%
    30%
    40%
    40%
    40%
    40%
    40%
    50%
    40%
    50%
    50%
    50%
    50%
    60%
    60%
    70%
    70%
    60%
    Temperature (°C)
    17°
    17°
    17°
    17°
    17°
    16°
    16°
    16°
    16°
    16°
    17°
    17°
    18°
    18°
    18°
    18°
    18°
    17°
    17°
    17°
    16°
    16°
    16°
    15°
    Feels like temperature (°C)
    16°
    16°
    16°
    16°
    15°
    15°
    15°
    15°
    15°
    15°
    16°
    16°
    17°
    17°
    17°
    17°
    17°
    17°
    17°
    17°
    16°
    16°
    16°
    15°
    Wind direction and speed (mph)
    SSW
    11
    S
    10
    S
    10
    S
    10
    S
    9
    S
    9
    S
    9
    S
    8
    S
    8
    S
    9
    SSW
    10
    SSW
    11
    SSW
    11
    SSW
    11
    SW
    11
    SW
    10
    SW
    9
    WSW
    8
    WSW
    7
    SW
    6
    SW
    5
    W
    5
    SSW
    5
    SSW
    5
    Wind gust (mph)
    28
    27
    27
    26
    26
    25
    25
    24
    25
    25
    23
    22
    22
    21
    20
    18
    16
    13
    11
    12
    10
    9
    9
    10
    Visibility (description)
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    G
    G
    G
    G
    Humidity
    90%
    89%
    89%
    88%
    89%
    89%
    90%
    91%
    91%
    92%
    92%
    92%
    93%
    92%
    91%
    90%
    88%
    90%
    91%
    93%
    94%
    95%
    95%
    95%
    UV - - - - - - 1 1 1 1 1 2 2 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 Light rain Light rain Light rain Overcast Light rain Light rain Light rain Light rain Light rain Heavy rain Heavy rain Heavy rain Light rain Light rain Light rain Light rain Light shower day Light shower day Light shower day Light shower night Light shower night Light shower night Light shower night Light shower night
    Chance of precipitation
    50%
    60%
    50%
    50%
    50%
    60%
    60%
    60%
    70%
    80%
    90%
    80%
    70%
    70%
    50%
    60%
    60%
    70%
    80%
    60%
    60%
    60%
    60%
    60%
    Temperature (°C)
    15°
    15°
    15°
    15°
    15°
    15°
    15°
    14°
    14°
    14°
    15°
    15°
    15°
    15°
    15°
    15°
    15°
    15°
    14°
    14°
    13°
    13°
    13°
    12°
    Feels like temperature (°C)
    15°
    15°
    15°
    15°
    15°
    14°
    14°
    14°
    14°
    14°
    14°
    14°
    14°
    14°
    13°
    13°
    13°
    13°
    12°
    12°
    11°
    11°
    11°
    11°
    Wind direction and speed (mph)
    SW
    5
    WSW
    5
    WSW
    5
    WSW
    5
    N
    5
    SE
    5
    SW
    5
    N
    5
    WNW
    5
    NNE
    6
    E
    7
    SSW
    9
    NNW
    11
    WNW
    11
    NW
    12
    NW
    12
    NW
    12
    WNW
    12
    NW
    12
    WNW
    11
    WNW
    11
    WNW
    10
    NW
    9
    WNW
    9
    Wind gust (mph)
    10
    10
    10
    9
    10
    10
    9
    10
    13
    15
    16
    17
    19
    16
    16
    19
    20
    22
    23
    21
    21
    21
    20
    19
    Visibility (description)
    G
    G
    G
    G
    G
    G
    G
    G
    G
    G
    M
    M
    G
    G
    VG
    E
    E
    E
    E
    E
    E
    E
    E
    E
    Humidity
    95%
    95%
    96%
    95%
    95%
    95%
    96%
    95%
    95%
    94%
    94%
    93%
    92%
    90%
    84%
    81%
    83%
    83%
    84%
    85%
    87%
    87%
    86%
    87%
    UV - - - - - - - 1 1 1 1 1 2 1 3 2 1 1 1 1 - - - -
    Sunday (21 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 shower night Light shower night Light shower night Light shower night Light shower night Light shower night Light shower night Cloudy Sunny intervals Sunny intervals Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Sunny intervals Sunny intervals Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night
    Chance of precipitation
    60%
    60%
    60%
    60%
    60%
    60%
    60%
    50%
    40%
    40%
    40%
    40%
    50%
    40%
    40%
    40%
    40%
    40%
    40%
    30%
    30%
    30%
    30%
    30%
    Temperature (°C)
    12°
    12°
    11°
    11°
    11°
    11°
    11°
    10°
    10°
    11°
    12°
    12°
    13°
    13°
    13°
    13°
    13°
    13°
    12°
    11°
    11°
    10°
    10°
    10°
    Feels like temperature (°C)
    10°
    10°
    10°
    10°
    10°
    11°
    10°
    11°
    11°
    11°
    10°
    10°
    Wind direction and speed (mph)
    NW
    9
    NW
    9
    NNW
    9
    NNW
    9
    NNW
    10
    NNW
    9
    NNW
    9
    N
    8
    N
    8
    N
    9
    N
    11
    N
    12
    N
    12
    N
    12
    N
    13
    N
    13
    N
    13
    N
    13
    N
    12
    N
    11
    N
    10
    N
    9
    N
    9
    NNE
    9
    Wind gust (mph)
    18
    19
    19
    15
    16
    15
    17
    17
    20
    21
    24
    26
    27
    28
    28
    26
    26
    26
    23
    22
    21
    21
    20
    18
    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
    88%
    89%
    89%
    88%
    88%
    87%
    87%
    87%
    86%
    81%
    76%
    72%
    72%
    73%
    67%
    66%
    65%
    66%
    70%
    74%
    75%
    78%
    78%
    79%
    UV - - - - - - - 1 1 1 2 3 3 3 2 2 1 1 1 1 - - - -
    Monday (22 September 2025)
    Time
    00:00
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Partly cloudy night Partly cloudy night Partly cloudy night Sunny intervals Sunny intervals Sunny intervals Sunny intervals Partly cloudy night Partly cloudy night
    Chance of precipitation
    30%
    20%
    10%
    10%
    10%
    10%
    10%
    10%
    10%
    Temperature (°C)
    12°
    14°
    14°
    12°
    10°
    Feels like temperature (°C)
    10°
    12°
    12°
    10°
    Wind direction and speed (mph)
    N
    8
    NNE
    8
    NNE
    8
    NNE
    8
    NNE
    10
    NNE
    11
    NNE
    11
    NNE
    9
    NNE
    7
    Wind gust (mph)
    18
    17
    15
    17
    21
    22
    20
    14
    10
    Visibility (description)
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    Humidity
    80%
    79%
    80%
    83%
    69%
    55%
    53%
    65%
    76%
    UV - - - 1 2 4 2 1 -
    Tuesday (23 September 2025)
    Time
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Partly cloudy night Partly cloudy night Sunny intervals Sunny intervals Cloudy Cloudy Partly cloudy night Partly cloudy night
    Chance of precipitation
    10%
    10%
    10%
    10%
    10%
    10%
    10%
    10%
    Temperature (°C)
    12°
    15°
    15°
    13°
    10°
    Feels like temperature (°C)
    10°
    13°
    13°
    11°
    Wind direction and speed (mph)
    N
    6
    N
    5
    NNE
    5
    NNE
    8
    NNE
    9
    N
    10
    N
    8
    N
    6
    Wind gust (mph)
    8
    7
    10
    16
    16
    15
    10
    8
    Visibility (description)
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    Humidity
    78%
    82%
    85%
    69%
    55%
    54%
    67%
    80%
    UV - - 1 2 4 1 1 -
    Wednesday (24 September 2025)
    Time
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Partly cloudy night Partly cloudy night Sunny intervals Sunny intervals Cloudy Sunny intervals Partly cloudy night Partly cloudy night
    Chance of precipitation
    10%
    10%
    10%
    20%
    20%
    10%
    10%
    10%
    Temperature (°C)
    13°
    15°
    16°
    13°
    11°
    Feels like temperature (°C)
    11°
    14°
    14°
    12°
    10°
    Wind direction and speed (mph)
    NNE
    6
    NNE
    5
    NNE
    6
    NE
    8
    NE
    9
    N
    8
    NNW
    7
    N
    6
    Wind gust (mph)
    7
    7
    8
    12
    13
    11
    8
    7
    Visibility (description)
    VG
    VG
    G
    VG
    VG
    VG
    VG
    VG
    Humidity
    85%
    86%
    89%
    77%
    63%
    59%
    75%
    84%
    UV - - 1 2 3 1 1 -

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

    Wales weather forecast

    Headline:

    Cloudy with outbreaks of rain. Breezy.

    This Evening and Tonight:

    Rain persisting throughout this evening and overnight, this turning heavy at times especially in the south over the hills and mountains. Windy for all, particularly along the coasts, and feeling humid. Minimum temperature 13 °C.

    Thursday:

    A cloudy, damp and mild start to Thursday. Cloud breaking in the east with some brighter spells, but drizzle persisting over the hills in the west. Staying windy and humid. Maximum temperature 20 °C.

    Outlook for Friday to Sunday:

    Remaining changeable with showers or longer spells of rain at times. Some brighter periods are also likely, mainly on Friday. Temperatures close to average but turning colder through Sunday. Breezy.

    Updated:

    UK long range weather forecast

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