Sydenham (County Antrim) weather

Forecast days

Sunny intervals changing to light showers in the afternoon.
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Sunset iconSunset:
M UV
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    7 day forecast for Sydenham

    Today (31 August 2025)
    Time
    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 Sunny intervals Sunny intervals Sunny intervals Sunny intervals Cloudy Sunny intervals Sunny intervals Sunny intervals Sunny intervals Light shower day Light shower day Light shower day Light shower day Light shower night Light rain Light rain Light shower night
    Chance of precipitation
    <5%
    <5%
    10%
    <5%
    <5%
    <5%
    <5%
    20%
    40%
    40%
    50%
    70%
    70%
    60%
    60%
    60%
    70%
    70%
    60%
    Temperature
    12°
    12°
    12°
    13°
    14°
    15°
    16°
    17°
    17°
    17°
    17°
    17°
    16°
    16°
    15°
    15°
    15°
    14°
    14°
    Feels like temperature (°C)
    10°
    11°
    12°
    12°
    13°
    13°
    13°
    13°
    13°
    13°
    12°
    12°
    12°
    12°
    12°
    12°
    Wind direction and speed
    S
    15
    S
    16
    S
    16
    S
    17
    S
    18
    S
    19
    S
    20
    S
    20
    S
    21
    S
    21
    S
    22
    S
    21
    S
    20
    S
    19
    S
    18
    S
    16
    S
    15
    S
    13
    S
    12
    Wind gust (mph)
    35
    36
    38
    39
    41
    43
    44
    46
    47
    48
    47
    46
    44
    41
    38
    36
    34
    32
    31
    Visibility
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    E
    Humidity
    80%
    78%
    77%
    75%
    71%
    65%
    62%
    61%
    62%
    62%
    64%
    65%
    72%
    74%
    79%
    82%
    84%
    85%
    86%
    UV - 1 1 1 2 3 4 5 5 5 4 2 1 1 1 1 - - -
    Monday (1 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 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 Cloudy Light shower day Light shower day Heavy shower day Heavy shower day Heavy shower day Light shower day Light shower day Light shower day Sunny intervals Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night
    Chance of precipitation
    40%
    30%
    20%
    20%
    30%
    30%
    30%
    30%
    30%
    40%
    50%
    50%
    80%
    90%
    90%
    80%
    70%
    60%
    60%
    50%
    40%
    30%
    20%
    10%
    Temperature (°C)
    14°
    14°
    13°
    13°
    13°
    13°
    13°
    13°
    13°
    14°
    15°
    15°
    16°
    16°
    16°
    16°
    16°
    16°
    16°
    15°
    14°
    14°
    13°
    13°
    Feels like temperature (°C)
    12°
    12°
    12°
    11°
    11°
    11°
    11°
    11°
    11°
    12°
    12°
    13°
    13°
    14°
    14°
    14°
    14°
    14°
    13°
    13°
    13°
    12°
    12°
    11°
    Wind direction and speed (mph)
    S
    11
    S
    10
    S
    10
    SSW
    10
    SSW
    10
    SSW
    10
    SSW
    10
    SSW
    10
    SSW
    11
    SW
    12
    SW
    13
    SW
    13
    SW
    13
    SW
    13
    SW
    13
    SW
    13
    WSW
    13
    WSW
    13
    WSW
    13
    WSW
    12
    SW
    11
    SW
    10
    SW
    9
    SW
    9
    Wind gust (mph)
    28
    26
    24
    23
    23
    24
    25
    26
    28
    28
    29
    30
    31
    31
    31
    31
    30
    29
    27
    24
    22
    22
    22
    22
    Visibility (description)
    E
    E
    E
    E
    E
    E
    E
    E
    E
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    Humidity
    86%
    86%
    86%
    87%
    87%
    87%
    87%
    87%
    86%
    85%
    80%
    79%
    76%
    77%
    83%
    82%
    78%
    76%
    73%
    74%
    76%
    79%
    82%
    82%
    UV - - - - - - 1 1 1 2 3 3 4 5 4 3 3 1 1 1 1 - - -
    Tuesday (2 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 Cloudy Sunny intervals Light shower day Light shower day Light shower day Cloudy Partly cloudy night
    Chance of precipitation
    10%
    <5%
    20%
    40%
    60%
    70%
    50%
    40%
    40%
    Temperature (°C)
    13°
    12°
    12°
    11°
    14°
    15°
    16°
    16°
    14°
    Feels like temperature (°C)
    11°
    11°
    10°
    10°
    13°
    14°
    15°
    15°
    14°
    Wind direction and speed (mph)
    SW
    9
    SW
    9
    SSW
    7
    S
    5
    S
    7
    S
    7
    SSW
    7
    SW
    6
    SW
    5
    Wind gust (mph)
    21
    20
    17
    14
    15
    16
    15
    12
    10
    Visibility (description)
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    Humidity
    83%
    85%
    86%
    88%
    83%
    77%
    69%
    74%
    83%
    UV - - - 1 2 5 2 1 -
    Wednesday (3 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 Light shower day Light shower day Partly cloudy night Partly cloudy night
    Chance of precipitation
    30%
    20%
    20%
    40%
    60%
    60%
    30%
    10%
    Temperature (°C)
    13°
    12°
    12°
    14°
    17°
    17°
    16°
    14°
    Feels like temperature (°C)
    13°
    11°
    11°
    13°
    15°
    15°
    15°
    13°
    Wind direction and speed (mph)
    SW
    5
    SW
    5
    SSW
    6
    SW
    9
    SW
    10
    SSW
    10
    SW
    9
    SSW
    7
    Wind gust (mph)
    11
    12
    16
    21
    22
    22
    16
    13
    Visibility (description)
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    Humidity
    87%
    87%
    89%
    77%
    64%
    62%
    72%
    79%
    UV - - 1 3 4 2 1 -
    Thursday (4 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 Light shower day Sunny intervals Partly cloudy night Partly cloudy night
    Chance of precipitation
    10%
    20%
    30%
    50%
    70%
    40%
    20%
    20%
    Temperature (°C)
    13°
    12°
    12°
    14°
    16°
    17°
    15°
    13°
    Feels like temperature (°C)
    12°
    11°
    11°
    12°
    14°
    14°
    13°
    11°
    Wind direction and speed (mph)
    SSW
    6
    SSW
    7
    SW
    7
    SW
    10
    WSW
    12
    WSW
    13
    WSW
    12
    SW
    11
    Wind gust (mph)
    12
    12
    15
    20
    21
    20
    18
    19
    Visibility (description)
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    VG
    Humidity
    83%
    86%
    88%
    79%
    69%
    65%
    70%
    82%
    UV - - 1 2 5 2 1 -
    Friday (5 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 Cloudy Cloudy Cloudy Cloudy Cloudy
    Chance of precipitation
    20%
    10%
    20%
    30%
    40%
    30%
    30%
    30%
    Temperature (°C)
    12°
    12°
    11°
    14°
    16°
    16°
    15°
    14°
    Feels like temperature (°C)
    10°
    11°
    13°
    13°
    13°
    12°
    Wind direction and speed (mph)
    SW
    11
    SW
    11
    SW
    11
    SW
    15
    SW
    17
    SW
    16
    SW
    13
    SW
    11
    Wind gust (mph)
    20
    21
    26
    29
    28
    25
    21
    17
    Visibility (description)
    VG
    G
    G
    G
    VG
    VG
    VG
    VG
    Humidity
    86%
    88%
    89%
    80%
    69%
    71%
    76%
    86%
    UV - - 1 3 4 2 1 -
    Saturday (6 September 2025)
    Time
    01:00
    04:00
    07:00
    10:00
    13:00
    16:00
    19:00
    22:00
    Weather symbols Cloudy Cloudy Overcast Cloudy Light shower day Cloudy Cloudy Cloudy
    Chance of precipitation
    30%
    30%
    30%
    50%
    50%
    40%
    50%
    40%
    Temperature (°C)
    13°
    13°
    12°
    15°
    17°
    17°
    16°
    14°
    Feels like temperature (°C)
    11°
    10°
    10°
    13°
    14°
    14°
    14°
    13°
    Wind direction and speed (mph)
    SSW
    11
    SSW
    12
    SSW
    13
    SSW
    15
    SSW
    16
    SSW
    16
    SSW
    13
    SSW
    11
    Wind gust (mph)
    17
    15
    18
    23
    24
    22
    16
    14
    Visibility (description)
    G
    G
    G
    G
    G
    G
    VG
    G
    Humidity
    90%
    92%
    92%
    88%
    83%
    80%
    85%
    91%
    UV - - 1 2 3 2 1 -

    UK video forecast

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    Northern Ireland weather forecast

    Headline:

    Showers this morning, turning heavier and quite frequent for afternoon.

    Today:

    A day of showers, these isolated and light for the morning, then turning heavier and quite frequent through the afternoon, bringing the risk of thunderstorms, particularly to the west of Lough Neagh. Southerly winds strong. Maximum temperature 18 °C.

    Tonight:

    Showers or longer periods of rain, turning heavy at times with the risk of thunderstorms. Winds southerly, strongest at first. Minimum temperature 12 °C.

    Monday:

    Showery with risk thunderstorms. Outbreaks most frequent across northern districts. Fresh to strong winds veering west to southwest. Maximum temperature 18 °C.

    Outlook for Tuesday to Thursday:

    Showers and brighter spells through the outlook period, with north and west wettest. Winds variable in direction and relatively light.

    Updated:

    UK long range weather forecast

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