Swansea (Swansea) weather

Forecast days

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7 day forecast for Swansea

Today (17 September 2025)
Time
16:00
17:00
18:00
19:00
20:00
21:00
22:00
23:00
Weather symbols Drizzle Light rain Light rain Light rain Light rain Light rain Light rain Light rain
Chance of precipitation
40%
90%
90%
90%
≥95%
≥95%
90%
90%
Temperature
18°
18°
17°
17°
17°
16°
16°
16°
Feels like temperature (°C)
16°
16°
16°
16°
15°
15°
15°
15°
Wind direction and speed
WSW
16
WSW
15
WSW
14
WSW
13
WSW
11
WSW
10
WSW
9
WSW
8
Wind gust (mph)
33
31
29
27
25
23
21
18
Visibility
M
M
M
M
M
M
M
M
Humidity
97%
98%
98%
98%
99%
98%
97%
97%
UV 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 Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast
Chance of precipitation
90%
90%
90%
90%
90%
90%
90%
80%
80%
70%
50%
30%
20%
20%
10%
10%
20%
20%
20%
20%
10%
10%
10%
10%
Temperature (°C)
16°
16°
16°
16°
17°
17°
17°
17°
17°
17°
17°
18°
18°
18°
19°
19°
19°
19°
18°
18°
18°
18°
17°
17°
Feels like temperature (°C)
15°
15°
15°
15°
15°
15°
15°
15°
15°
15°
15°
15°
16°
16°
16°
16°
16°
16°
16°
16°
16°
16°
16°
16°
Wind direction and speed (mph)
WSW
8
WSW
9
SW
9
SW
10
SW
11
SW
11
SW
12
SW
12
SW
13
SW
15
SW
16
SW
16
SW
16
SW
16
SW
16
SW
16
SW
16
SW
16
SW
15
SW
14
SSW
12
SSW
12
SSW
12
SSW
11
Wind gust (mph)
16
18
20
23
24
22
22
26
29
32
33
34
34
33
33
34
33
32
30
28
27
27
27
27
Visibility (description)
M
M
M
M
M
P
P
M
M
M
G
VG
VG
VG
VG
VG
VG
VG
VG
VG
VG
VG
VG
VG
Humidity
97%
98%
98%
99%
99%
99%
99%
99%
99%
99%
97%
95%
91%
89%
86%
85%
85%
85%
86%
86%
87%
87%
87%
88%
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 Overcast Overcast Overcast Overcast Cloudy Light rain Light rain Cloudy
Chance of precipitation
10%
10%
10%
10%
20%
10%
10%
20%
30%
30%
30%
30%
40%
40%
40%
40%
40%
40%
40%
50%
50%
50%
50%
50%
Temperature (°C)
17°
17°
17°
17°
17°
16°
16°
16°
16°
16°
17°
17°
18°
18°
18°
18°
18°
18°
18°
17°
17°
16°
16°
16°
Feels like temperature (°C)
16°
16°
15°
15°
15°
15°
15°
15°
15°
15°
15°
16°
16°
17°
17°
18°
17°
17°
17°
17°
17°
16°
16°
16°
Wind direction and speed (mph)
SSW
11
S
10
S
10
S
11
S
11
S
10
S
10
S
10
S
10
S
10
SSW
11
SSW
11
SSW
10
S
10
SSW
9
SSW
9
SW
9
SW
8
WSW
7
WSW
6
WSW
5
WSW
5
SSW
5
SSW
5
Wind gust (mph)
26
25
25
23
23
23
22
22
23
23
22
21
21
20
17
17
15
15
12
12
10
9
10
11
Visibility (description)
VG
VG
VG
VG
VG
VG
VG
VG
VG
VG
VG
VG
VG
VG
VG
VG
VG
VG
VG
VG
VG
VG
G
G
Humidity
88%
88%
87%
86%
87%
87%
87%
88%
87%
87%
88%
88%
88%
87%
87%
88%
85%
87%
89%
91%
91%
92%
93%
93%
UV - - - - - - 1 1 1 1 1 2 2 2 2 1 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 Overcast Overcast Overcast Overcast Overcast Overcast Light rain Light rain Light rain Light rain Heavy rain Light rain Light rain Light shower day Cloudy Cloudy Cloudy Light shower day Light shower day Light shower night Light shower night Light shower night Light shower night Light shower night
Chance of precipitation
40%
50%
40%
40%
50%
50%
50%
50%
60%
70%
80%
80%
70%
60%
50%
50%
50%
50%
70%
60%
50%
50%
50%
50%
Temperature (°C)
16°
15°
15°
15°
15°
15°
15°
15°
14°
15°
15°
15°
16°
16°
16°
16°
16°
15°
15°
14°
14°
13°
13°
13°
Feels like temperature (°C)
15°
15°
15°
15°
15°
15°
14°
14°
14°
14°
14°
14°
14°
14°
14°
14°
13°
13°
13°
12°
11°
11°
11°
11°
Wind direction and speed (mph)
S
6
SSW
6
SSE
5
S
5
SSE
5
S
6
S
6
SSE
6
S
7
S
8
SSE
9
S
9
ESE
10
SSW
12
NW
12
WSW
13
W
14
W
13
W
13
W
12
W
12
W
12
WNW
11
WNW
10
Wind gust (mph)
11
11
10
10
12
12
13
15
17
18
18
17
19
19
17
21
21
23
24
22
21
21
19
17
Visibility (description)
G
G
G
G
G
G
G
G
G
G
G
G
G
VG
VG
VG
E
E
E
E
E
E
E
E
Humidity
93%
93%
93%
93%
93%
93%
94%
94%
93%
92%
92%
92%
91%
89%
82%
78%
79%
77%
77%
79%
82%
82%
84%
85%
UV - - - - - - 1 1 1 1 1 1 2 1 2 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 Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Sunny intervals Cloudy Sunny intervals 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%
50%
50%
40%
40%
30%
40%
40%
40%
40%
50%
40%
40%
40%
40%
30%
30%
20%
20%
20%
Temperature (°C)
12°
12°
12°
11°
11°
11°
11°
10°
10°
11°
12°
13°
13°
13°
14°
14°
13°
13°
12°
12°
11°
11°
10°
10°
Feels like temperature (°C)
10°
10°
10°
10°
10°
11°
11°
11°
11°
11°
11°
10°
Wind direction and speed (mph)
WNW
10
WNW
10
WNW
9
NW
10
NNW
10
NNW
10
NNW
10
NNW
9
NNW
9
NNW
9
N
10
N
11
N
11
N
12
N
12
N
13
N
13
N
12
N
12
N
11
N
10
N
9
N
9
N
9
Wind gust (mph)
15
19
20
17
15
15
17
18
21
21
23
24
26
26
28
28
26
25
23
22
21
21
20
19
Visibility (description)
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
VG
VG
VG
VG
VG
Humidity
86%
86%
86%
86%
87%
86%
85%
84%
83%
78%
73%
68%
65%
67%
63%
62%
62%
64%
67%
70%
73%
75%
76%
77%
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 Cloudy Cloudy Partly cloudy night Partly cloudy night
Chance of precipitation
20%
20%
10%
10%
10%
20%
10%
10%
10%
Temperature (°C)
10°
12°
14°
14°
13°
11°
Feels like temperature (°C)
10°
12°
12°
11°
Wind direction and speed (mph)
N
8
N
8
N
7
N
7
NNE
10
NNE
12
NNE
11
NNE
10
NNE
8
Wind gust (mph)
18
17
15
19
23
22
20
15
13
Visibility (description)
VG
VG
VG
VG
VG
VG
VG
VG
VG
Humidity
78%
78%
79%
81%
68%
56%
54%
61%
71%
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 Cloudy Cloudy
Chance of precipitation
10%
10%
10%
10%
20%
20%
20%
20%
Temperature (°C)
10°
12°
15°
15°
13°
11°
Feels like temperature (°C)
10°
13°
13°
12°
10°
Wind direction and speed (mph)
NNE
7
NE
7
NE
7
NE
9
NE
11
NNE
10
NNE
9
NE
7
Wind gust (mph)
10
9
15
19
19
17
13
10
Visibility (description)
VG
VG
VG
VG
VG
VG
VG
VG
Humidity
75%
79%
83%
69%
56%
56%
66%
79%
UV - - 1 2 4 1 1 -

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

Wales weather forecast

Headline:

Heavy and persistent rain.

Today:

Heaviest and most persistent rain clearing eastwards through the morning, though remaining cloudy with outbreaks of patchy rain and drizzle throughout the day, turning heavy at times over the hills. Breezy. Maximum temperature 19 °C.

Tonight:

Rain persisting throughout this evening and overnight, this turning heavy at times especially over the hills and mountains. Windy for all, especially along the coasts, and feeling humid. Minimum temperature 8 °C.

Thursday:

A cloudy, damp and mild start to Thursday. Cloud breaking in the east but drizzle persisting over the hills in the west. Staying windy. Maximum temperature 18 °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 later Sunday. Breezy.

Updated:

UK long range weather forecast

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