11-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Morning
Light rain
10°
Feels like 6°
Wind↑ E 36 km/h
Gusts45 km/h
Humidity 83 %
💧 1.8 mm
Evening
Mainly clear
10°
Feels like 10°
Wind↑ NNE 25 km/h
Gusts35 km/h
Humidity 70 %
12-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Morning
Clear sky
8°
Feels like 6°
Wind↑ N 14 km/h
Gusts22 km/h
Humidity 77 %
Evening
Mainly clear
9°
Feels like 7°
Wind↑ NNW 15 km/h
Humidity 72 %
13-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Morning
Partly cloudy
9°
Feels like 7°
Wind↑ NW 12 km/h
Humidity 77 %
Evening
Clear sky
10°
Feels like 10°
Wind↑ NNW 14 km/h
Humidity 75 %
14-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Morning
Overcast
10°
Feels like 10°
Wind↑ N 19 km/h
Gusts27 km/h
Humidity 80 %
Swansea forecast in charts · next 7 days
The week ahead: highs and lows
≈ A week close to the usual temperatures
Highs Lows Usual for the season (1991–2020 average)
Hourly detail
Temperature (°C) Rain (mm) Wind (km/h)
Swansea climate: what a normal year looks like
From 16 h 39 min of daylight in late June to 7 h 48 min in late December.
The hottest stretch is July, when afternoons average 19 °C; the coldest is February, when nights average 3 °C.
There is no real dry season: monthly rainfall stays between 82 mm and 141 mm on average.
Even the coldest month, February, keeps nights above freezing on average (3 °C).
The coming week looks normal for October: forecast highs average 13 °C, against a usual 13 °C.
30-year averages (1991–2020)
Month
Typical high
Typical low
Rainfall
Jan
7 °C
4 °C
131 mm
Feb
8 °C
3 °C
101 mm
Mar
9 °C
4 °C
89 mm
Apr
12 °C
6 °C
82 mm
May
15 °C
8 °C
90 mm
Jun
17 °C
11 °C
94 mm
Jul
19 °C
13 °C
100 mm
Aug
19 °C
13 °C
108 mm
Sep
17 °C
11 °C
97 mm
Oct
13 °C
9 °C
134 mm
Nov
10 °C
6 °C
133 mm
Dec
8 °C
4 °C
141 mm
Whole year
13 °C
8 °C
1,300 mm
Source: our own processing of the ERA5 reanalysis (Copernicus/ECMWF) for 51.62° N, 3.94° W, 1991–2020. ERA5 averages over a 0.25° grid (about 25 km): hills, a coastline or the heat of the city itself can shift local values by a degree or two.
Air you breathe in Swansea: pollution and pollen
2/6
Fair
European Air Quality Index (EAQI), from Copernicus CAMS
PM2.54µg/m³
PM1011µg/m³
O₃69µg/m³
NO₂4µg/m³
SO₂1µg/m³
Pollen
AlderNone
BirchNone
GrassNone
MugwortNone
OliveNone
RagweedNone
Copernicus CAMS model, updated several times a day.
Rain radar around Swansea
Rain observed over the last two hours by official weather radars around Swansea, followed by the radar forecast for the next hour where the weather service provides one.
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Rain radarLast two hours, then forecast where available · drag the timeline
Moon over Swansea
Waning gibbous
87 % illuminated · 18.3 days
Rise 06:15 Set —
Fri30/1079%
Sat31/1069%
Sun1/1159%
Mon2/1149%Last quarter
Tue3/1138%
Wed4/1128%
Thu5/1119%
Fri6/1112%
Sat7/116%
Sun8/112%
Mon9/110%
Tue10/111%New moon
Moonrise and moonset in local time (Europe/London); phase and lit fraction from a synodic calculation.
Look up a past day in Swansea
Curious about the weather in Swansea on a given day? Choose a date: we read it from the ERA5 reanalysis (ECMWF / Copernicus C3S), which runs until about a week ago.
Swansea weather at a glance
This page gathers everything about the weather in Swansea, WLS: conditions now, the forecast for each part of the day and the trend for the coming week. At the moment the sky is “overcast”, it is 14 °C (feels like 14 °C) and the wind blows at 14 km/h.
Expected range today: 12 °C to 14 °C and a dry sky. The forecast comes from the AtmoAtlas engine, which combines ECMWF-AIFS, NOAA GFS and DWD ICON, adjusts cloud cover with METAR reports and uses convective energy (CAPE) to flag storms.
Use the Swansea forecast in your own website or app: one JSON call returns weather, air quality, tides and sun and moon times. The free key needs no card.
