Measurements:
°C
°F
CURRENT WEATHER
21:03
Portsmouth
52°F
SE 19 mph
Feels like: 46°F
Precip: 2%
World Resorts USA Portsmouth Weather

14 Day Weather Forecast

10.05
mon
DAY
66°F
E 14 mph
precip
26%
NIGHT
46°F
SE 17 mph
precip
4%
10.06
tue
DAY
52°F
SE 20 mph
precip
2%
NIGHT
42°F
E 8 mph
precip
4%
10.07
wed
DAY
60°F
N 9 mph
precip
1%
NIGHT
56°F
NE 13 mph
precip
16%
10.08
thu
DAY
70°F
NE 13 mph
precip
3%
NIGHT
54°F
E 10 mph
precip
5%
10.09
fri
DAY
60°F
E 16 mph
precip
1%
NIGHT
50°F
NE 11 mph
precip
5%
10.10
sat
DAY
54°F
SE 13 mph
precip
1%
NIGHT
46°F
W 4 mph
precip
13%
10.11
sun
DAY
60°F
NE 12 mph
precip
13%
NIGHT
60°F
NE 11 mph
precip
53%
10.12
mon
DAY
58°F
W 6 mph
precip
81%
NIGHT
50°F
SW 19 mph
precip
42%
10.13
tue
DAY
50°F
SW 9 mph
precip
1%
NIGHT
44°F
NE 9 mph
precip
11%
10.14
wed
DAY
58°F
NE 9 mph
precip
6%
NIGHT
56°F
NE 12 mph
precip
22%
10.15
thu
DAY
68°F
NE 12 mph
precip
20%
NIGHT
62°F
NE 11 mph
precip
27%
10.16
fri
DAY
58°F
SW 12 mph
precip
50%
NIGHT
50°F
SW 15 mph
precip
81%
10.17
sat
DAY
56°F
SW 10 mph
precip
74%
NIGHT
56°F
S 9 mph
precip
56%
10.18
sun
DAY
50°F
S 16 mph
precip
69%
NIGHT
46°F
S 19 mph
precip
52%

Portsmouth Sea Water Temperature in October, °F

Select Year: 2025 2024 2023

The average sea surface temperature in October 2025 for Portsmouth was 58.9°F. The maximum and minimum values were 55.4°F and 64.6°F respectively.

Portsmouth on the Weather Map

Best Time to Visit Portsmouth
The most sunny months:
November 16 days
October 14 days
July 13 days
The most warm months:
July 82.8 °F
August 80.9 °F
June 76.1 °F
Warmest sea temperature:
August 67.0 °F
July 65.2 °F
September 63.8 °F
The most cold months:
January 30.9 °F
February 32.1 °F
December 36.4 °F
The most rainy months:
July 3 days
August 2 days
September 2 days
The most windy months:
January 9 mph
March 9 mph
November 9 mph
more details
USA Resorts:
NAME
F°
Boston +58
Chicago +60
Hawaii +82
Houston +84
Las Vegas +92
Los Angeles +102
Maui +74
Miami +88
Myrtle Beach +70
New York +62
San Diego +84
San Francisco +66
Santa Monica +94
Sarasota +84
Washington +64
all resorts
24 Hours Weather Forecast
Portsmouth
Local time: 21:03
06 oct, tuesday
0000 46°F
SE
17 mph
0300 44°F
E
17 mph
0600 42°F
E
19 mph
0900 44°F
SE
19 mph
1200 52°F
SE
20 mph
1500 58°F
SE
18 mph
1800 54°F
SE
13 mph
2100 46°F
SE
9 mph