Portsmouth (United States of America) weather
Find a forecast
Forecast days
-
Maximum daytime temperature: 24° Celsius; Minimum nighttime temperature: 18° Celsius;
Maximum daytime temperature: 24° Celsius; Minimum nighttime temperature: 18° Celsius; -
Maximum daytime temperature: 29° Celsius; Minimum nighttime temperature: 19° Celsius;
Maximum daytime temperature: 29° Celsius; Minimum nighttime temperature: 19° Celsius; -
Maximum daytime temperature: 27° Celsius; Minimum nighttime temperature: 21° Celsius;
Maximum daytime temperature: 27° Celsius; Minimum nighttime temperature: 21° Celsius;
-
Maximum daytime temperature: 25° Celsius; Minimum nighttime temperature: 21° Celsius;
Maximum daytime temperature: 25° Celsius; Minimum nighttime temperature: 21° Celsius;
-
Maximum daytime temperature: 24° Celsius; Minimum nighttime temperature: 20° Celsius;
Maximum daytime temperature: 24° Celsius; Minimum nighttime temperature: 20° Celsius; -
Maximum daytime temperature: 26° Celsius; Minimum nighttime temperature: 20° Celsius;
Maximum daytime temperature: 26° Celsius; Minimum nighttime temperature: 20° Celsius;
-
Maximum daytime temperature: 29° Celsius; Minimum nighttime temperature: 21° Celsius;
Maximum daytime temperature: 29° Celsius; Minimum nighttime temperature: 21° Celsius;
Drizzle changing to sunny intervals in the afternoon.
Sunrise:
Sunset:
H UV
No pollution data.
No pollen data.
7 day forecast for Portsmouth
Today (18 September 2025)
| Time |
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 |
10%
|
20%
|
20%
|
10%
|
20%
|
10%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
| Temperature |
21°
|
22°
|
22°
|
23°
|
24°
|
24°
|
24°
|
23°
|
22°
|
22°
|
22°
|
21°
|
| Feels like temperature (°C) |
22°
|
23°
|
23°
|
24°
|
25°
|
25°
|
25°
|
25°
|
24°
|
24°
|
23°
|
22°
|
| Wind direction and speed |
NW
6
|
NW
6
|
NW
6
|
NW
6
|
NW
5
|
NNW
5
|
NNW
4
|
NW
3
|
WNW
2
|
SW
3
|
SSW
3
|
SSW
4
|
| Wind gust (mph) |
14
|
15
|
14
|
14
|
13
|
11
|
9
|
7
|
7
|
8
|
8
|
8
|
| Visibility |
G
|
G
|
G
|
G
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
89%
|
83%
|
80%
|
75%
|
73%
|
72%
|
74%
|
76%
|
81%
|
79%
|
82%
|
85%
|
| UV | 5 | 5 | 6 | 3 | 2 | 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 | |
|
|
|
|
 |
|
|
 |
 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Chance of precipitation |
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
10%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
| Temperature (°C) |
20°
|
20°
|
19°
|
19°
|
19°
|
18°
|
18°
|
18°
|
18°
|
18°
|
19°
|
22°
|
24°
|
26°
|
27°
|
28°
|
28°
|
29°
|
28°
|
27°
|
26°
|
26°
|
25°
|
24°
|
| Feels like temperature (°C) |
22°
|
21°
|
21°
|
20°
|
20°
|
19°
|
19°
|
19°
|
19°
|
19°
|
21°
|
23°
|
26°
|
28°
|
29°
|
30°
|
30°
|
30°
|
30°
|
29°
|
28°
|
27°
|
26°
|
26°
|
| Wind direction and speed (mph) |
SW
3
|
SW
4
|
WSW
4
|
WSW
4
|
WSW
4
|
WSW
4
|
WSW
3
|
WSW
3
|
WSW
4
|
WSW
4
|
WSW
4
|
WSW
4
|
WSW
4
|
W
3
|
WNW
3
|
NW
3
|
NNW
2
|
N
2
|
NE
3
|
ENE
3
|
E
3
|
SE
3
|
SE
4
|
SSE
4
|
| Wind gust (mph) |
8
|
8
|
8
|
8
|
8
|
8
|
8
|
9
|
9
|
10
|
10
|
10
|
10
|
10
|
10
|
10
|
9
|
9
|
10
|
10
|
9
|
9
|
9
|
9
|
| Visibility (description) |
VG
|
VG
|
G
|
G
|
G
|
M
|
P
|
VP
|
VP
|
P
|
G
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
87%
|
92%
|
93%
|
96%
|
97%
|
99%
|
100%
|
100%
|
100%
|
100%
|
96%
|
85%
|
76%
|
69%
|
61%
|
56%
|
52%
|
51%
|
56%
|
60%
|
60%
|
63%
|
65%
|
68%
|
| UV | - | - | - | - | - | - | 1 | 1 | 1 | 3 | 5 | 7 | 8 | 8 | 7 | 5 | 3 | 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 | |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
 |
|
| Chance of precipitation |
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
10%
|
10%
|
<5%
|
<5%
|
<5%
|
10%
|
10%
|
| Temperature (°C) |
24°
|
23°
|
22°
|
21°
|
21°
|
20°
|
20°
|
19°
|
20°
|
21°
|
23°
|
24°
|
25°
|
26°
|
26°
|
26°
|
26°
|
26°
|
25°
|
24°
|
23°
|
23°
|
23°
|
22°
|
| Feels like temperature (°C) |
25°
|
24°
|
24°
|
23°
|
22°
|
22°
|
21°
|
21°
|
22°
|
23°
|
24°
|
25°
|
26°
|
26°
|
26°
|
26°
|
26°
|
26°
|
25°
|
24°
|
23°
|
23°
|
23°
|
23°
|
| Wind direction and speed (mph) |
SSE
4
|
S
4
|
S
3
|
S
3
|
S
3
|
S
3
|
SSW
2
|
ENE
3
|
NE
3
|
NE
3
|
NE
4
|
NE
5
|
ENE
7
|
ENE
8
|
ENE
8
|
ENE
8
|
ENE
9
|
ENE
9
|
ENE
9
|
ENE
9
|
ENE
8
|
ENE
8
|
ENE
8
|
ENE
8
|
| Wind gust (mph) |
8
|
8
|
7
|
6
|
5
|
5
|
5
|
6
|
8
|
11
|
13
|
16
|
18
|
20
|
21
|
21
|
21
|
20
|
20
|
19
|
18
|
18
|
17
|
17
|
| Visibility (description) |
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
G
|
G
|
G
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
74%
|
76%
|
82%
|
85%
|
87%
|
88%
|
92%
|
94%
|
92%
|
87%
|
82%
|
75%
|
67%
|
62%
|
59%
|
58%
|
58%
|
60%
|
63%
|
69%
|
74%
|
77%
|
84%
|
85%
|
| UV | - | - | - | - | - | - | 1 | 1 | 1 | 3 | 5 | 7 | 8 | 8 | 6 | 5 | 3 | 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 |
<5%
|
<5%
|
10%
|
10%
|
10%
|
10%
|
10%
|
10%
|
20%
|
20%
|
30%
|
30%
|
30%
|
20%
|
20%
|
30%
|
30%
|
20%
|
20%
|
10%
|
<5%
|
10%
|
<5%
|
10%
|
| Temperature (°C) |
22°
|
22°
|
22°
|
22°
|
21°
|
21°
|
21°
|
21°
|
22°
|
22°
|
23°
|
23°
|
24°
|
25°
|
25°
|
25°
|
25°
|
24°
|
24°
|
23°
|
23°
|
22°
|
22°
|
22°
|
| Feels like temperature (°C) |
22°
|
22°
|
22°
|
22°
|
22°
|
22°
|
22°
|
21°
|
22°
|
22°
|
22°
|
23°
|
23°
|
24°
|
24°
|
24°
|
24°
|
23°
|
23°
|
23°
|
22°
|
22°
|
22°
|
21°
|
| Wind direction and speed (mph) |
ENE
8
|
ENE
8
|
ENE
8
|
NE
8
|
NE
8
|
NE
8
|
NE
8
|
NE
8
|
NE
9
|
NE
10
|
NE
10
|
NE
11
|
NE
12
|
NE
12
|
NE
12
|
NE
12
|
NE
12
|
NE
12
|
NE
11
|
NE
11
|
NE
11
|
NE
10
|
NE
10
|
NE
9
|
| Wind gust (mph) |
17
|
16
|
16
|
16
|
17
|
17
|
18
|
19
|
22
|
23
|
25
|
25
|
26
|
27
|
27
|
27
|
27
|
26
|
25
|
24
|
23
|
22
|
21
|
20
|
| Visibility (description) |
VG
|
VG
|
G
|
G
|
G
|
G
|
G
|
G
|
G
|
G
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
86%
|
88%
|
88%
|
91%
|
91%
|
91%
|
91%
|
91%
|
89%
|
86%
|
82%
|
78%
|
74%
|
70%
|
71%
|
69%
|
69%
|
71%
|
74%
|
75%
|
79%
|
81%
|
84%
|
85%
|
| UV | - | - | - | - | - | - | 1 | 1 | 1 | 3 | 4 | 5 | 5 | 6 | 6 | 4 | 2 | 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
|
23:00
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Chance of precipitation |
10%
|
10%
|
10%
|
20%
|
20%
|
20%
|
20%
|
10%
|
30%
|
20%
|
20%
|
30%
|
30%
|
30%
|
20%
|
20%
|
10%
|
10%
|
<5%
|
<5%
|
<5%
|
<5%
|
| Temperature (°C) |
21°
|
21°
|
21°
|
21°
|
21°
|
21°
|
21°
|
21°
|
21°
|
21°
|
22°
|
22°
|
23°
|
23°
|
24°
|
24°
|
24°
|
24°
|
24°
|
23°
|
23°
|
22°
|
| Feels like temperature (°C) |
22°
|
21°
|
21°
|
21°
|
21°
|
21°
|
21°
|
21°
|
21°
|
22°
|
22°
|
23°
|
23°
|
24°
|
24°
|
25°
|
25°
|
25°
|
24°
|
24°
|
24°
|
23°
|
| Wind direction and speed (mph) |
NE
8
|
NNE
8
|
NNE
7
|
NNE
7
|
NNE
7
|
NNE
7
|
NNE
7
|
NNE
7
|
NNE
7
|
NNE
8
|
NNE
8
|
NNE
8
|
N
8
|
NNE
8
|
NNE
8
|
NNE
7
|
NNE
7
|
NE
7
|
NE
7
|
NE
6
|
ENE
6
|
E
5
|
| Wind gust (mph) |
18
|
17
|
16
|
16
|
16
|
15
|
16
|
15
|
17
|
17
|
18
|
19
|
19
|
19
|
19
|
18
|
18
|
16
|
15
|
13
|
13
|
10
|
| Visibility (description) |
VG
|
G
|
G
|
G
|
G
|
G
|
G
|
G
|
G
|
G
|
G
|
G
|
G
|
G
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
87%
|
87%
|
88%
|
91%
|
92%
|
91%
|
92%
|
93%
|
92%
|
92%
|
90%
|
88%
|
83%
|
81%
|
76%
|
73%
|
73%
|
73%
|
72%
|
75%
|
77%
|
84%
|
| UV | - | - | - | - | - | - | 1 | 1 | 1 | 2 | 2 | 4 | 5 | 5 | 5 | 4 | 2 | 1 | 1 | 1 | - | - |
Tuesday (23 September 2025)
| Time |
02:00
|
05:00
|
08:00
|
11:00
|
14:00
|
17:00
|
20:00
|
23:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
|
|
| Chance of precipitation |
<5%
|
10%
|
10%
|
10%
|
<5%
|
<5%
|
10%
|
10%
|
| Temperature (°C) |
21°
|
20°
|
20°
|
22°
|
25°
|
26°
|
25°
|
23°
|
| Feels like temperature (°C) |
23°
|
22°
|
22°
|
24°
|
26°
|
28°
|
26°
|
25°
|
| Wind direction and speed (mph) |
NNE
4
|
WNW
4
|
WNW
3
|
W
4
|
W
4
|
SSE
4
|
SSW
5
|
S
5
|
| Wind gust (mph) |
10
|
10
|
11
|
13
|
13
|
12
|
12
|
11
|
| Visibility (description) |
G
|
G
|
G
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
91%
|
95%
|
96%
|
86%
|
71%
|
63%
|
71%
|
79%
|
| UV | - | - | 1 | 5 | 6 | 1 | - | - |
Wednesday (24 September 2025)
| Time |
02:00
|
05:00
|
08:00
|
11:00
|
14:00
|
17:00
|
20:00
|
23:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
|
|
| Chance of precipitation |
10%
|
10%
|
10%
|
10%
|
20%
|
10%
|
10%
|
<5%
|
| Temperature (°C) |
22°
|
21°
|
21°
|
24°
|
28°
|
29°
|
26°
|
24°
|
| Feels like temperature (°C) |
23°
|
22°
|
22°
|
25°
|
29°
|
29°
|
27°
|
26°
|
| Wind direction and speed (mph) |
SSW
5
|
SW
5
|
WSW
5
|
W
6
|
NW
6
|
NW
7
|
W
7
|
WSW
5
|
| Wind gust (mph) |
11
|
11
|
14
|
17
|
18
|
17
|
13
|
13
|
| Visibility (description) |
VG
|
G
|
G
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
87%
|
94%
|
94%
|
78%
|
59%
|
55%
|
63%
|
74%
|
| UV | - | - | 1 | 6 | 6 | 1 | - | - |
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Updated 13:24 (UTC+1) on Thu 18 Sep 2025
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