29.10
thu
thu
Day
61°F
NE 12 mph
Precip.
4%
4%
Night
55°F
NE 12 mph
Precip.
10%
10%
30.10
fri
fri
Day
64°F
E 15 mph
Precip.
1%
1%
Night
48°F
SE 17 mph
Precip.
4%
4%
31.10
sat
sat
Day
48°F
SE 9 mph
Precip.
1%
1%
Night
39°F
SE 8 mph
Precip.
7%
7%
01.11
sun
sun
Day
55°F
E 7 mph
Precip.
1%
1%
Night
45°F
NE 9 mph
Precip.
6%
6%
02.11
mon
mon
Day
64°F
E 9 mph
Precip.
3%
3%
Night
52°F
E 7 mph
Precip.
9%
9%
03.11
tue
tue
Day
54°F
W 9 mph
Precip.
22%
22%
Night
50°F
W 8 mph
Precip.
19%
19%
04.11
wed
wed
Day
52°F
NW 8 mph
Precip.
18%
18%
Night
46°F
N 5 mph
Precip.
19%
19%
sea water
temperature
temperature
| Portsmouth |
monthly
weather
weather
| Portsmouth |
current
weather
weather
| Portsmouth |
14 days
forecast
forecast
| Portsmouth |
Sea water temperature in October, °F
Show year:
2026
2025
2024
The average sea water temperature in October of 2026 was 56.4°F. The highest and lowest sea temperatures during the month were 60.8°F and 53.1°F.
Sea water temperature in November, °F
Show year:
2025
2024
2023
The average sea water temperature in November of 2025 was 51.1°F. The highest and lowest sea temperatures during the month were 58.3°F and 47.7°F.
Air temperature in Portsmouth, °F
Precipitation total in Portsmouth, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Portsmouth
Portsmouth on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Portsmouth
Local time: 12:35
October 29, thursday
1500
64°F
NE
11 mph
11 mph
1800
61°F
NE
11 mph
11 mph
2100
57°F
NE
12 mph
12 mph
October 30, friday
0000
55°F
NE
12 mph
12 mph
0300
55°F
NE
11 mph
11 mph
0600
55°F
NE
9 mph
9 mph
0900
57°F
E
9 mph
9 mph
1200
64°F
E
15 mph
15 mph
