Llantwit Major (Vale of Glamorgan) weather

Forecast days

Yellow weather warning.
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Sunset iconSunset:
L UV
L Pollution
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7 day forecast for Llantwit Major

Today (17 September 2025)
Time
19:00
20:00
21:00
22:00
23:00
Weather symbols Light rain Light rain Light rain Light rain Light rain
Chance of precipitation
90%
≥95%
≥95%
90%
≥95%
Temperature
18°
17°
17°
17°
17°
Feels like temperature (°C)
15°
15°
15°
15°
15°
Wind direction and speed
WSW
18
WSW
18
WSW
17
WSW
16
WSW
15
Wind gust (mph)
29
29
27
25
23
Visibility
M
M
M
M
M
Humidity
96%
97%
97%
97%
96%
UV 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 Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Cloudy Partly cloudy night
Chance of precipitation
≥95%
≥95%
≥95%
90%
90%
80%
80%
70%
50%
40%
30%
20%
10%
10%
10%
<5%
10%
10%
10%
10%
10%
10%
<5%
<5%
Temperature (°C)
17°
17°
17°
17°
17°
17°
17°
17°
17°
17°
18°
18°
19°
19°
19°
19°
20°
19°
19°
18°
18°
17°
17°
17°
Feels like temperature (°C)
15°
15°
15°
15°
15°
15°
15°
15°
15°
15°
16°
16°
17°
17°
18°
18°
19°
19°
18°
17°
17°
16°
16°
16°
Wind direction and speed (mph)
WSW
13
WSW
12
SW
12
WSW
13
WSW
14
WSW
15
SW
15
SW
14
WSW
14
WSW
15
SW
15
WSW
15
WSW
14
WSW
13
WSW
12
WSW
11
SW
10
SW
9
SSW
9
SSW
10
SSW
10
SSW
10
SSW
10
SSW
9
Wind gust (mph)
22
22
23
23
24
25
24
24
27
29
29
30
30
30
29
27
26
25
23
23
23
23
22
21
Visibility (description)
M
M
M
M
M
M
M
M
M
G
VG
VG
VG
VG
E
E
E
VG
VG
VG
VG
VG
VG
VG
Humidity
97%
98%
97%
97%
97%
97%
97%
97%
96%
95%
94%
91%
87%
85%
84%
82%
83%
83%
84%
85%
85%
85%
86%
87%
UV - - - - - - 1 1 1 1 1 2 2 3 3 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 Partly cloudy night Partly cloudy night Partly cloudy night Cloudy Cloudy Partly cloudy night Partly cloudy night Cloudy Overcast Cloudy Cloudy Cloudy Cloudy Sunny intervals Cloudy Sunny intervals Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy
Chance of precipitation
<5%
<5%
<5%
<5%
<5%
<5%
10%
<5%
10%
10%
10%
20%
20%
30%
30%
20%
30%
30%
30%
20%
20%
30%
30%
30%
Temperature (°C)
17°
17°
16°
16°
16°
16°
15°
15°
16°
16°
17°
18°
18°
19°
19°
19°
19°
19°
18°
18°
17°
16°
16°
16°
Feels like temperature (°C)
16°
16°
16°
16°
15°
15°
15°
15°
15°
16°
17°
17°
18°
19°
19°
19°
19°
18°
18°
17°
17°
16°
16°
16°
Wind direction and speed (mph)
S
8
S
7
S
7
S
6
S
5
S
5
S
5
S
5
S
5
S
6
S
6
S
7
S
7
S
7
SSW
7
SW
8
SW
8
WSW
8
W
8
W
7
WNW
6
W
5
WSW
5
SW
5
Wind gust (mph)
19
17
15
13
12
12
12
10
12
15
16
16
16
15
14
14
13
12
14
13
12
10
11
12
Visibility (description)
VG
VG
VG
VG
VG
VG
VG
VG
VG
VG
VG
VG
VG
VG
VG
VG
VG
VG
VG
VG
VG
VG
VG
VG
Humidity
87%
88%
89%
88%
89%
89%
89%
90%
87%
86%
85%
84%
81%
80%
80%
80%
82%
84%
86%
89%
91%
91%
91%
92%
UV - - - - - - 1 1 1 1 2 3 3 3 3 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 Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Light rain Light rain Heavy rain Light rain Light rain Light shower day Cloudy Cloudy Cloudy Light shower day Light shower night Light shower night Light shower night Light shower night Partly cloudy night
Chance of precipitation
40%
40%
40%
30%
30%
40%
40%
40%
40%
60%
70%
70%
70%
70%
60%
50%
50%
50%
60%
60%
50%
50%
50%
50%
Temperature (°C)
16°
15°
15°
15°
15°
15°
15°
15°
14°
15°
15°
16°
16°
16°
16°
16°
16°
15°
15°
14°
13°
13°
13°
12°
Feels like temperature (°C)
15°
15°
15°
14°
14°
14°
14°
14°
14°
14°
14°
14°
14°
14°
14°
14°
13°
13°
12°
12°
11°
11°
10°
10°
Wind direction and speed (mph)
SSW
6
SW
6
NW
6
NW
6
SW
6
S
5
S
5
SE
5
SE
6
SSE
7
SE
8
SE
9
SE
11
S
12
W
13
W
14
W
15
WNW
14
W
14
W
14
W
13
WNW
13
W
13
W
13
Wind gust (mph)
12
11
11
11
11
11
11
14
16
16
17
16
17
19
20
20
21
21
25
24
22
21
19
21
Visibility (description)
VG
VG
VG
VG
VG
VG
VG
VG
G
VG
VG
VG
VG
VG
VG
VG
E
E
E
E
E
E
E
E
Humidity
93%
94%
94%
94%
93%
93%
93%
93%
92%
90%
88%
88%
88%
85%
80%
80%
81%
78%
78%
81%
82%
84%
84%
85%
UV - - - - - - 1 1 1 1 1 1 2 3 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 Cloudy Light shower night Light shower night Light shower night Light shower night Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night
Chance of precipitation
50%
60%
60%
60%
50%
50%
50%
40%
40%
40%
40%
40%
50%
50%
50%
40%
40%
40%
40%
30%
30%
30%
30%
30%
Temperature (°C)
12°
12°
12°
12°
11°
11°
11°
10°
10°
11°
12°
12°
13°
13°
13°
13°
13°
13°
12°
11°
10°
10°
10°
10°
Feels like temperature (°C)
10°
10°
10°
10°
11°
11°
11°
10°
10°
10°
Wind direction and speed (mph)
WNW
13
WNW
13
WNW
12
WNW
12
NW
11
NW
11
NNW
11
NNW
10
N
10
N
10
N
11
N
12
N
12
NNE
12
N
12
N
13
N
13
N
13
N
13
N
12
N
11
N
11
N
11
N
11
Wind gust (mph)
17
17
21
23
19
19
17
18
18
20
20
23
22
24
25
24
25
24
24
22
21
21
21
20
Visibility (description)
E
E
E
E
E
E
E
E
VG
E
E
E
E
E
E
E
E
E
E
VG
VG
VG
VG
VG
Humidity
85%
85%
86%
85%
87%
86%
85%
85%
84%
80%
75%
72%
69%
67%
68%
65%
67%
65%
68%
72%
73%
74%
76%
77%
UV - - - - - - 1 1 1 1 2 3 3 3 3 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)
11°
12°
10°
Wind direction and speed (mph)
NNE
11
NNE
11
NNE
10
NNE
11
NNE
13
NE
14
NE
13
NNE
12
NNE
11
Wind gust (mph)
21
20
19
22
24
22
21
19
17
Visibility (description)
VG
VG
VG
VG
VG
VG
VG
VG
VG
Humidity
79%
80%
80%
81%
69%
58%
54%
59%
69%
UV - - - 1 2 4 1 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°
12°
Feels like temperature (°C)
10°
12°
13°
11°
10°
Wind direction and speed (mph)
NE
10
NE
10
NE
10
NE
12
NE
12
NE
12
NE
11
NE
10
Wind gust (mph)
14
12
16
17
16
16
14
12
Visibility (description)
VG
VG
VG
VG
VG
VG
VG
VG
Humidity
75%
78%
80%
71%
58%
57%
65%
77%
UV - - 1 2 4 1 1 -

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Llantwit Major weather map

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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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