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Unsettled Weather Ahead
Heavy rain, strong winds, and marked temperature contrasts are expected across the UK over the coming days.
Read moreBlackwood (Caerphilly) weather
Find a forecast
Forecast days
-
Maximum daytime temperature: 17° Celsius; Minimum nighttime temperature: 8° Celsius;
Maximum daytime temperature: 17° Celsius; Minimum nighttime temperature: 8° Celsius; -
Maximum daytime temperature: 14° Celsius; Minimum nighttime temperature: 5° Celsius;
Maximum daytime temperature: 14° Celsius; Minimum nighttime temperature: 5° Celsius; -
Maximum daytime temperature: 14° Celsius; Minimum nighttime temperature: 5° Celsius;
Maximum daytime temperature: 14° Celsius; Minimum nighttime temperature: 5° Celsius; -
Maximum daytime temperature: 15° Celsius; Minimum nighttime temperature: 7° Celsius;
Maximum daytime temperature: 15° Celsius; Minimum nighttime temperature: 7° Celsius;
-
Maximum daytime temperature: 16° Celsius; Minimum nighttime temperature: 6° Celsius;
Maximum daytime temperature: 16° Celsius; Minimum nighttime temperature: 6° Celsius;
-
Maximum daytime temperature: 16° Celsius; Minimum nighttime temperature: 6° Celsius;
Maximum daytime temperature: 16° Celsius; Minimum nighttime temperature: 6° Celsius;
-
Maximum daytime temperature: 17° Celsius; Minimum nighttime temperature: 8° Celsius;
Maximum daytime temperature: 17° Celsius; Minimum nighttime temperature: 8° Celsius;
Heavy rain changing to partly cloudy by early evening.
Sunrise:
Sunset:
L UV
L Pollution
No pollen data.
7 day forecast for Blackwood
Today (20 September 2025)
| Time |
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 |
≥95%
|
90%
|
70%
|
90%
|
90%
|
90%
|
90%
|
80%
|
70%
|
60%
|
40%
|
50%
|
40%
|
40%
|
30%
|
20%
|
30%
|
| Temperature |
14°
|
14°
|
14°
|
15°
|
15°
|
15°
|
15°
|
16°
|
16°
|
16°
|
15°
|
15°
|
13°
|
12°
|
12°
|
11°
|
11°
|
| Feels like temperature (°C) |
14°
|
14°
|
14°
|
14°
|
14°
|
15°
|
15°
|
14°
|
14°
|
14°
|
13°
|
13°
|
11°
|
10°
|
10°
|
10°
|
9°
|
| Wind direction and speed |
S
4
|
S
5
|
S
6
|
S
7
|
S
7
|
SSW
8
|
SSW
8
|
SW
9
|
SW
10
|
WSW
12
|
W
12
|
W
12
|
W
11
|
W
10
|
WNW
9
|
W
8
|
WNW
8
|
| Wind gust (mph) |
10
|
13
|
16
|
16
|
16
|
16
|
17
|
19
|
22
|
22
|
23
|
22
|
21
|
19
|
15
|
14
|
13
|
| Visibility |
M
|
M
|
M
|
M
|
M
|
M
|
M
|
M
|
G
|
VG
|
E
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
96%
|
97%
|
97%
|
97%
|
97%
|
96%
|
96%
|
95%
|
94%
|
91%
|
85%
|
85%
|
86%
|
86%
|
86%
|
88%
|
90%
|
| UV | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 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 | |
|
|
|
|
 |
|
|
|
|
|
|
|
|
|
|
|
 |
|
 |
|
|
|
|
| Chance of precipitation |
30%
|
10%
|
10%
|
20%
|
20%
|
20%
|
30%
|
20%
|
20%
|
20%
|
20%
|
10%
|
10%
|
10%
|
20%
|
20%
|
10%
|
10%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
| Temperature (°C) |
11°
|
11°
|
10°
|
10°
|
10°
|
10°
|
9°
|
9°
|
9°
|
10°
|
11°
|
11°
|
12°
|
13°
|
13°
|
13°
|
13°
|
13°
|
12°
|
10°
|
9°
|
9°
|
8°
|
8°
|
| Feels like temperature (°C) |
9°
|
10°
|
9°
|
9°
|
9°
|
9°
|
8°
|
8°
|
8°
|
8°
|
8°
|
9°
|
9°
|
10°
|
11°
|
11°
|
11°
|
10°
|
10°
|
9°
|
8°
|
7°
|
6°
|
6°
|
| Wind direction and speed (mph) |
WNW
7
|
WNW
5
|
NW
5
|
NW
4
|
NNW
4
|
N
5
|
N
5
|
N
6
|
N
8
|
NNE
9
|
NNE
11
|
NNE
12
|
NNE
12
|
NNE
12
|
NNE
12
|
NNE
12
|
N
12
|
NNE
12
|
NNE
10
|
N
9
|
N
8
|
N
8
|
N
8
|
N
7
|
| Wind gust (mph) |
12
|
9
|
9
|
8
|
8
|
10
|
13
|
15
|
20
|
23
|
25
|
25
|
25
|
26
|
27
|
28
|
27
|
25
|
21
|
17
|
18
|
18
|
18
|
18
|
| Visibility (description) |
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
| Humidity |
90%
|
91%
|
91%
|
91%
|
91%
|
88%
|
88%
|
88%
|
86%
|
81%
|
76%
|
69%
|
60%
|
55%
|
51%
|
47%
|
48%
|
46%
|
55%
|
63%
|
66%
|
68%
|
72%
|
75%
|
| UV | - | - | - | - | - | - | 1 | 1 | 1 | 1 | 2 | 3 | 3 | 4 | 3 | 3 | 1 | 1 | 1 | 1 | - | - | - | - |
Monday (22 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 | |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 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%
|
<5%
|
| Temperature (°C) |
7°
|
7°
|
7°
|
7°
|
6°
|
6°
|
6°
|
6°
|
6°
|
8°
|
10°
|
11°
|
12°
|
13°
|
14°
|
14°
|
14°
|
13°
|
12°
|
10°
|
9°
|
8°
|
8°
|
8°
|
| Feels like temperature (°C) |
5°
|
5°
|
5°
|
4°
|
4°
|
4°
|
3°
|
3°
|
4°
|
6°
|
8°
|
9°
|
10°
|
11°
|
11°
|
12°
|
12°
|
11°
|
11°
|
9°
|
7°
|
7°
|
6°
|
6°
|
| Wind direction and speed (mph) |
N
7
|
N
7
|
N
7
|
N
7
|
N
7
|
N
7
|
N
7
|
N
7
|
N
7
|
NNE
8
|
NNE
10
|
NNE
11
|
NE
11
|
NE
10
|
NE
10
|
NE
9
|
NNE
9
|
NNE
8
|
NNE
8
|
NNE
7
|
N
6
|
N
6
|
NNE
7
|
NNE
6
|
| Wind gust (mph) |
17
|
17
|
17
|
17
|
17
|
16
|
16
|
17
|
19
|
21
|
23
|
23
|
23
|
22
|
22
|
21
|
20
|
18
|
14
|
14
|
14
|
15
|
15
|
15
|
| Visibility (description) |
E
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
76%
|
78%
|
81%
|
83%
|
83%
|
83%
|
82%
|
82%
|
78%
|
72%
|
64%
|
56%
|
53%
|
41%
|
40%
|
40%
|
40%
|
40%
|
54%
|
63%
|
66%
|
66%
|
67%
|
70%
|
| UV | - | - | - | - | - | - | 1 | 1 | 1 | 1 | 3 | 4 | 4 | 4 | 4 | 3 | 2 | 1 | 1 | 1 | - | - | - | - |
Tuesday (23 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 | |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Chance of precipitation |
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
10%
|
<5%
|
<5%
|
<5%
|
<5%
|
10%
|
<5%
|
| Temperature (°C) |
7°
|
7°
|
7°
|
6°
|
6°
|
6°
|
6°
|
6°
|
7°
|
9°
|
11°
|
12°
|
13°
|
14°
|
15°
|
15°
|
15°
|
14°
|
14°
|
12°
|
11°
|
10°
|
10°
|
10°
|
| Feels like temperature (°C) |
5°
|
5°
|
5°
|
5°
|
4°
|
5°
|
4°
|
4°
|
6°
|
8°
|
10°
|
10°
|
11°
|
12°
|
13°
|
13°
|
13°
|
13°
|
12°
|
10°
|
10°
|
9°
|
9°
|
8°
|
| Wind direction and speed (mph) |
NNE
6
|
NNE
6
|
N
5
|
N
5
|
N
5
|
N
5
|
N
5
|
N
5
|
N
5
|
NNE
6
|
NNE
7
|
NE
8
|
NE
8
|
NE
8
|
NE
8
|
NE
8
|
NE
7
|
NE
7
|
NE
6
|
NNE
6
|
NNE
5
|
NNE
5
|
NNE
5
|
NNE
5
|
| Wind gust (mph) |
14
|
14
|
12
|
11
|
11
|
10
|
10
|
10
|
10
|
12
|
13
|
15
|
16
|
16
|
16
|
15
|
14
|
12
|
10
|
10
|
11
|
11
|
11
|
12
|
| Visibility (description) |
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
E
|
E
|
E
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
74%
|
76%
|
78%
|
81%
|
83%
|
83%
|
83%
|
82%
|
79%
|
73%
|
66%
|
60%
|
56%
|
56%
|
54%
|
53%
|
54%
|
55%
|
64%
|
74%
|
75%
|
76%
|
76%
|
78%
|
| UV | - | - | - | - | - | - | - | 1 | 1 | 1 | 2 | 3 | 4 | 4 | 3 | 2 | 1 | 1 | 1 | 1 | - | - | - | - |
Wednesday (24 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 | |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Chance of precipitation |
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
10%
|
10%
|
10%
|
10%
|
10%
|
10%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
| Temperature (°C) |
9°
|
9°
|
9°
|
9°
|
9°
|
9°
|
8°
|
8°
|
9°
|
11°
|
12°
|
13°
|
14°
|
14°
|
15°
|
15°
|
15°
|
15°
|
14°
|
13°
|
12°
|
11°
|
11°
|
10°
|
| Feels like temperature (°C) |
8°
|
8°
|
8°
|
7°
|
7°
|
7°
|
7°
|
7°
|
8°
|
9°
|
10°
|
11°
|
12°
|
13°
|
13°
|
13°
|
14°
|
13°
|
13°
|
12°
|
11°
|
10°
|
10°
|
9°
|
| Wind direction and speed (mph) |
NNE
5
|
NNE
5
|
NNE
5
|
NNE
5
|
NNE
5
|
NNE
5
|
NNE
5
|
NNE
5
|
NNE
5
|
NNE
6
|
NE
7
|
NE
8
|
NE
8
|
NE
9
|
NE
9
|
NNE
8
|
NNE
8
|
NNE
8
|
NNE
7
|
NNE
6
|
N
6
|
N
5
|
N
5
|
N
5
|
| Wind gust (mph) |
12
|
11
|
11
|
11
|
11
|
11
|
11
|
10
|
13
|
14
|
15
|
16
|
16
|
15
|
15
|
14
|
13
|
12
|
10
|
10
|
11
|
11
|
9
|
9
|
| 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 |
80%
|
82%
|
84%
|
85%
|
86%
|
87%
|
88%
|
90%
|
87%
|
83%
|
76%
|
72%
|
67%
|
64%
|
59%
|
58%
|
58%
|
59%
|
66%
|
74%
|
76%
|
78%
|
80%
|
81%
|
| UV | - | - | - | - | - | - | - | 1 | 1 | 1 | 2 | 3 | 4 | 3 | 3 | 2 | 1 | 1 | 1 | 1 | - | - | - | - |
Thursday (25 September 2025)
| Time |
00:00
|
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
|
|
|
| Chance of precipitation |
<5%
|
<5%
|
<5%
|
10%
|
10%
|
10%
|
<5%
|
<5%
|
<5%
|
| Temperature (°C) |
10°
|
9°
|
8°
|
7°
|
12°
|
15°
|
15°
|
13°
|
11°
|
| Feels like temperature (°C) |
9°
|
9°
|
7°
|
6°
|
11°
|
13°
|
14°
|
12°
|
10°
|
| Wind direction and speed (mph) |
N
4
|
N
4
|
N
4
|
N
4
|
NNE
7
|
NE
8
|
NE
8
|
NNE
6
|
NNE
4
|
| Wind gust (mph) |
8
|
6
|
5
|
8
|
13
|
15
|
12
|
8
|
6
|
| Visibility (description) |
VG
|
VG
|
G
|
G
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
82%
|
83%
|
88%
|
91%
|
78%
|
63%
|
58%
|
73%
|
82%
|
| UV | - | - | - | 1 | 2 | 4 | 1 | 1 | - |
Friday (26 September 2025)
| Time |
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
|
|
| Chance of precipitation |
<5%
|
10%
|
10%
|
10%
|
10%
|
10%
|
10%
|
10%
|
| Temperature (°C) |
10°
|
8°
|
7°
|
12°
|
15°
|
16°
|
13°
|
12°
|
| Feels like temperature (°C) |
9°
|
7°
|
7°
|
11°
|
13°
|
14°
|
12°
|
11°
|
| Wind direction and speed (mph) |
NNE
4
|
NNE
3
|
NE
3
|
ESE
6
|
SE
8
|
SE
9
|
SE
7
|
ESE
6
|
| Wind gust (mph) |
4
|
4
|
6
|
12
|
14
|
12
|
9
|
6
|
| Visibility (description) |
G
|
G
|
G
|
VG
|
G
|
VG
|
VG
|
VG
|
| Humidity |
87%
|
92%
|
94%
|
84%
|
72%
|
67%
|
78%
|
85%
|
| UV | - | - | 1 | 2 | 4 | 1 | 1 | - |
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WARNING
Flood alerts in force for Wales
Flood alerts in force for Wales
Wales weather forecast
Headline:
Very wet today with heavy rain and possible flooding.
Today:
A cool and often wet day with periods of heavy rain, persistent at times and perhaps producing flooding and travel disruption in places. Possibly brighter by the evening. Windier later. Maximum temperature 16 °C.
Tonight:
Rain clearing northeastwards this evening and any windier conditions also easing. Heavy and possibly thundery showers do however remain a possibility. Brisk northerly winds developing in the west. Feeling chilly. Minimum temperature 6 °C.
Sunday:
A mixed start to the day with often cloudy skies and scattered showers. Sunny spells developing but feeling rather chilly in the brisk northerly winds, especially in the west. Maximum temperature 14 °C.
Outlook for Monday to Wednesday:
High pressure will bring a much more settled picture early next week. Often sunny on Monday, then somewhat cloudier on Tuesday and Wednesday. Feeling cool with rural frosts possible overnight.
Updated: