Merthyr Tydfil (Merthyr Tydfil) weather
Find a forecast
Forecast days
-
Maximum daytime temperature: 17° Celsius; Minimum nighttime temperature: 11° Celsius;
Maximum daytime temperature: 17 degrees Celsius; Minimum nighttime temperature: 11 degrees Celsius; -
Maximum daytime temperature: 20° Celsius; Minimum nighttime temperature: 15° Celsius;
Maximum daytime temperature: 20 degrees Celsius; Minimum nighttime temperature: 15 degrees Celsius; -
Maximum daytime temperature: 19° Celsius; Minimum nighttime temperature: 10° Celsius;
Maximum daytime temperature: 19 degrees Celsius; Minimum nighttime temperature: 10 degrees Celsius; -
Maximum daytime temperature: 17° Celsius; Minimum nighttime temperature: 9° Celsius;
Maximum daytime temperature: 17 degrees Celsius; Minimum nighttime temperature: 9 degrees Celsius;
-
Maximum daytime temperature: 17° Celsius; Minimum nighttime temperature: 9° Celsius;
Maximum daytime temperature: 17 degrees Celsius; Minimum nighttime temperature: 9 degrees Celsius;
-
Maximum daytime temperature: 18° Celsius; Minimum nighttime temperature: 8° Celsius;
Maximum daytime temperature: 18 degrees Celsius; Minimum nighttime temperature: 8 degrees Celsius;
-
Maximum daytime temperature: 16° Celsius; Minimum nighttime temperature: 9° Celsius;
Maximum daytime temperature: 16 degrees Celsius; Minimum nighttime temperature: 9 degrees Celsius;
Sunny.
Sunrise:
Sunset:
M UV
L Pollution
No pollen data.
7 day forecast for Merthyr Tydfil
Today (28 September 2026)
| 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 |  |
 |
|
|
|
|
 |
|
|
 |
|
|
|
|
|
|
|
|
|
|
|
|
|
| Chance of precipitation |
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
| Temperature |
8°
|
8°
|
7°
|
7°
|
7°
|
7°
|
7°
|
8°
|
11°
|
13°
|
15°
|
16°
|
16°
|
17°
|
17°
|
17°
|
17°
|
16°
|
13°
|
11°
|
11°
|
12°
|
12°
|
| Feels like temperature (°C) |
8°
|
7°
|
7°
|
7°
|
7°
|
7°
|
7°
|
8°
|
11°
|
13°
|
15°
|
16°
|
16°
|
16°
|
17°
|
17°
|
16°
|
16°
|
13°
|
10°
|
10°
|
10°
|
11°
|
| Wind direction and speed |
NNE
2
|
N
2
|
NNE
2
|
NNE
2
|
NNE
2
|
NE
2
|
NE
2
|
NE
2
|
E
2
|
SE
2
|
SSE
2
|
SSE
2
|
SE
2
|
SE
3
|
SE
3
|
SE
3
|
SE
4
|
ESE
3
|
E
3
|
ENE
5
|
ENE
6
|
ENE
7
|
ENE
7
|
| Wind gust (mph) |
8
|
8
|
8
|
8
|
8
|
7
|
7
|
6
|
6
|
8
|
9
|
9
|
9
|
12
|
12
|
12
|
11
|
10
|
11
|
12
|
14
|
15
|
15
|
| Visibility |
G
|
M
|
M
|
M
|
M
|
M
|
M
|
M
|
G
|
G
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
93%
|
93%
|
93%
|
93%
|
93%
|
93%
|
92%
|
91%
|
85%
|
77%
|
67%
|
63%
|
56%
|
55%
|
54%
|
54%
|
54%
|
65%
|
73%
|
70%
|
68%
|
68%
|
68%
|
| UV | - | - | - | - | - | - | 1 | 1 | 1 | 2 | 3 | 3 | 4 | 3 | 2 | 1 | 1 | 1 | - | - | - | - | - |
Tuesday (29 September 2026)
| 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 |  |
|
 |
 |
|
|
|
|
 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Chance of precipitation |
<5%
|
10%
|
20%
|
20%
|
30%
|
40%
|
40%
|
50%
|
60%
|
60%
|
50%
|
40%
|
20%
|
10%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
10%
|
30%
|
40%
|
60%
|
80%
|
| Temperature (°C) |
12°
|
12°
|
12°
|
12°
|
13°
|
13°
|
13°
|
14°
|
14°
|
15°
|
16°
|
16°
|
17°
|
18°
|
19°
|
20°
|
20°
|
20°
|
19°
|
19°
|
19°
|
19°
|
19°
|
19°
|
| Feels like temperature (°C) |
11°
|
11°
|
11°
|
11°
|
12°
|
12°
|
12°
|
13°
|
13°
|
13°
|
14°
|
15°
|
16°
|
17°
|
18°
|
19°
|
19°
|
18°
|
18°
|
18°
|
18°
|
18°
|
17°
|
17°
|
| Wind direction and speed (mph) |
ENE
7
|
ENE
7
|
ENE
7
|
ENE
7
|
E
8
|
E
8
|
E
8
|
E
8
|
E
9
|
E
9
|
ESE
10
|
ESE
10
|
SE
11
|
SE
11
|
SE
11
|
SE
11
|
SSE
13
|
SSE
13
|
SSE
13
|
SE
13
|
SE
13
|
SE
13
|
SSE
13
|
SSE
14
|
| Wind gust (mph) |
15
|
16
|
16
|
17
|
17
|
18
|
19
|
20
|
20
|
22
|
22
|
23
|
24
|
25
|
26
|
26
|
27
|
27
|
27
|
26
|
29
|
28
|
29
|
28
|
| Visibility (description) |
VG
|
VG
|
VG
|
G
|
M
|
M
|
P
|
P
|
P
|
P
|
P
|
P
|
P
|
P
|
M
|
G
|
VG
|
G
|
G
|
G
|
G
|
G
|
G
|
M
|
| Humidity |
72%
|
76%
|
85%
|
90%
|
92%
|
96%
|
98%
|
98%
|
98%
|
98%
|
99%
|
98%
|
97%
|
95%
|
91%
|
84%
|
83%
|
84%
|
85%
|
87%
|
88%
|
88%
|
91%
|
91%
|
| UV | - | - | - | - | - | - | - | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | - | - | - | - | - |
Wednesday (30 September 2026)
| 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 |  |
|
|
|
|
|
|
 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Chance of precipitation |
80%
|
90%
|
90%
|
≥95%
|
≥95%
|
90%
|
80%
|
70%
|
50%
|
40%
|
20%
|
20%
|
20%
|
30%
|
30%
|
30%
|
30%
|
40%
|
40%
|
40%
|
40%
|
30%
|
30%
|
40%
|
| Temperature (°C) |
18°
|
18°
|
18°
|
17°
|
17°
|
17°
|
17°
|
16°
|
16°
|
16°
|
17°
|
17°
|
18°
|
18°
|
19°
|
18°
|
18°
|
18°
|
17°
|
15°
|
14°
|
14°
|
13°
|
13°
|
| Feels like temperature (°C) |
16°
|
16°
|
16°
|
16°
|
16°
|
16°
|
16°
|
15°
|
15°
|
15°
|
15°
|
16°
|
16°
|
16°
|
16°
|
16°
|
16°
|
16°
|
15°
|
14°
|
14°
|
13°
|
13°
|
12°
|
| Wind direction and speed (mph) |
SSE
14
|
SSE
14
|
SSE
13
|
SSE
11
|
S
11
|
S
10
|
S
9
|
S
8
|
S
8
|
S
9
|
SSW
10
|
SSW
10
|
SSW
11
|
SSW
11
|
SSW
11
|
SW
11
|
SW
10
|
SSW
9
|
SSW
8
|
SSW
6
|
SSW
5
|
S
5
|
S
5
|
S
5
|
| Wind gust (mph) |
29
|
29
|
31
|
30
|
29
|
29
|
24
|
21
|
22
|
24
|
28
|
29
|
30
|
30
|
29
|
28
|
27
|
23
|
22
|
21
|
18
|
17
|
17
|
16
|
| Visibility (description) |
M
|
M
|
P
|
P
|
P
|
P
|
P
|
M
|
M
|
M
|
M
|
G
|
G
|
G
|
G
|
VG
|
VG
|
VG
|
G
|
G
|
G
|
G
|
G
|
G
|
| Humidity |
94%
|
94%
|
96%
|
96%
|
97%
|
97%
|
97%
|
97%
|
97%
|
95%
|
89%
|
81%
|
68%
|
65%
|
65%
|
64%
|
66%
|
68%
|
74%
|
82%
|
87%
|
88%
|
91%
|
93%
|
| UV | - | - | - | - | - | - | - | 1 | 1 | 1 | 2 | 3 | 3 | 3 | 3 | 2 | 1 | 1 | 1 | - | - | - | - | - |
Thursday (1 October 2026)
| 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 | |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Chance of precipitation |
40%
|
40%
|
40%
|
40%
|
40%
|
50%
|
50%
|
50%
|
50%
|
50%
|
50%
|
40%
|
40%
|
40%
|
40%
|
40%
|
40%
|
40%
|
30%
|
30%
|
20%
|
20%
|
20%
|
20%
|
| Temperature (°C) |
13°
|
11°
|
11°
|
11°
|
11°
|
11°
|
11°
|
10°
|
11°
|
12°
|
14°
|
15°
|
16°
|
16°
|
17°
|
16°
|
16°
|
16°
|
15°
|
13°
|
12°
|
12°
|
11°
|
11°
|
| Feels like temperature (°C) |
12°
|
11°
|
11°
|
10°
|
11°
|
11°
|
10°
|
10°
|
11°
|
12°
|
13°
|
14°
|
15°
|
15°
|
15°
|
15°
|
15°
|
15°
|
14°
|
13°
|
12°
|
11°
|
11°
|
11°
|
| Wind direction and speed (mph) |
S
5
|
S
4
|
S
3
|
S
3
|
SSE
3
|
S
3
|
S
2
|
S
2
|
SSW
2
|
SSW
3
|
SW
5
|
SW
6
|
WSW
7
|
WSW
8
|
WSW
8
|
WSW
8
|
WSW
8
|
WSW
7
|
SW
6
|
SW
3
|
SW
2
|
SW
2
|
SSE
2
|
SSE
2
|
| Wind gust (mph) |
16
|
14
|
13
|
13
|
13
|
13
|
9
|
9
|
9
|
13
|
18
|
20
|
22
|
23
|
23
|
23
|
21
|
19
|
16
|
13
|
9
|
9
|
9
|
9
|
| Visibility (description) |
G
|
M
|
M
|
M
|
M
|
M
|
M
|
M
|
M
|
G
|
G
|
G
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
G
|
G
|
G
|
G
|
G
|
G
|
| Humidity |
93%
|
94%
|
95%
|
95%
|
95%
|
94%
|
95%
|
94%
|
93%
|
90%
|
86%
|
80%
|
72%
|
69%
|
65%
|
65%
|
68%
|
72%
|
73%
|
81%
|
84%
|
87%
|
88%
|
88%
|
| UV | - | - | - | - | - | - | - | 1 | 1 | 1 | 2 | 3 | 3 | 3 | 3 | 2 | 1 | 1 | 1 | - | - | - | - | - |
Friday (2 October 2026)
| Time |
00:00
|
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
|
|
|
| Chance of precipitation |
20%
|
30%
|
30%
|
30%
|
20%
|
30%
|
20%
|
10%
|
10%
|
| Temperature (°C) |
11°
|
11°
|
11°
|
10°
|
15°
|
17°
|
17°
|
14°
|
11°
|
| Feels like temperature (°C) |
10°
|
10°
|
11°
|
10°
|
14°
|
16°
|
16°
|
14°
|
11°
|
| Wind direction and speed (mph) |
SSE
3
|
SSE
3
|
SSE
3
|
SSE
3
|
S
5
|
SSW
8
|
SSW
8
|
SSW
3
|
S
2
|
| Wind gust (mph) |
12
|
12
|
13
|
13
|
19
|
20
|
17
|
9
|
8
|
| Visibility (description) |
M
|
M
|
M
|
M
|
G
|
G
|
G
|
G
|
M
|
| Humidity |
90%
|
91%
|
92%
|
95%
|
87%
|
74%
|
73%
|
88%
|
95%
|
| UV | - | - | - | 1 | 2 | 3 | 1 | - | - |
Saturday (3 October 2026)
| Time |
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
 |
|
|
|
|
|
|
| Chance of precipitation |
10%
|
10%
|
10%
|
20%
|
30%
|
20%
|
20%
|
20%
|
| Temperature (°C) |
10°
|
11°
|
10°
|
14°
|
17°
|
18°
|
14°
|
11°
|
| Feels like temperature (°C) |
10°
|
10°
|
10°
|
14°
|
16°
|
17°
|
14°
|
11°
|
| Wind direction and speed (mph) |
S
2
|
S
2
|
SSE
2
|
SSE
3
|
S
6
|
S
6
|
SSW
3
|
WSW
2
|
| Wind gust (mph) |
7
|
6
|
9
|
13
|
16
|
13
|
8
|
7
|
| Visibility (description) |
P
|
P
|
VP
|
G
|
G
|
VG
|
G
|
M
|
| Humidity |
97%
|
98%
|
99%
|
92%
|
76%
|
70%
|
87%
|
92%
|
| UV | - | - | 1 | 2 | 3 | 1 | - | - |
Sunday (4 October 2026)
| Time |
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
|
|
| Chance of precipitation |
20%
|
20%
|
10%
|
20%
|
10%
|
10%
|
10%
|
10%
|
| Temperature (°C) |
10°
|
9°
|
9°
|
14°
|
16°
|
16°
|
13°
|
10°
|
| Feels like temperature (°C) |
10°
|
8°
|
8°
|
14°
|
16°
|
15°
|
13°
|
10°
|
| Wind direction and speed (mph) |
NW
2
|
NNW
2
|
NW
3
|
NNW
3
|
N
5
|
N
6
|
N
3
|
NNW
3
|
| Wind gust (mph) |
7
|
8
|
9
|
13
|
16
|
15
|
10
|
9
|
| Visibility (description) |
P
|
P
|
P
|
M
|
G
|
VG
|
G
|
M
|
| Humidity |
95%
|
96%
|
97%
|
86%
|
73%
|
68%
|
86%
|
91%
|
| UV | - | - | 1 | 2 | 3 | 1 | - | - |
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Wales weather forecast
Headline:
A changeable few days to come.
This Evening and Tonight:
Rain is expected to clear to the east this evening to leave a brighter end to the day. Turning chilly overnight under clear skies and lighter winds. Minimum temperature 4 °C.
Monday:
A dry day on Monday with light winds and prolonged spells of sunshine. Chilly at first, but warm in the afternoon. Sunshine turning hazy at times. Maximum temperature 19 °C.
Outlook for Tuesday to Thursday:
Turning very wet and windy later on Tuesday with coastal gales. Rain clearing by Wednesday and Thursday to leave sunshine and showers with a keen breeze.
Updated: