World Resorts USA Portsmouth Weather

Portsmouth 7 Days Forecast

11.01
sun
Day
36°F
E 4 mph
Precip.
0%
Night
32°F
E 13 mph
Precip.
0%
12.01
mon
Day
32°F
E 17 mph
Precip.
0%
Night
32°F
NE 11 mph
Precip.
0%
13.01
tue
Day
39°F
E 12 mph
Precip.
0%
Night
36°F
N 11 mph
Precip.
0%
14.01
wed
Day
43°F
NE 12 mph
Precip.
100%
Night
36°F
NE 6 mph
Precip.
0%
15.01
thu
Day
36°F
S 9 mph
Precip.
28%
Night
25°F
SW 22 mph
Precip.
72%
16.01
fri
Day
21°F
S 19 mph
Precip.
100%
Night
19°F
E 7 mph
Precip.
0%
17.01
sat
Day
27°F
E 4 mph
Precip.
0%
Night
25°F
NE 6 mph
Precip.
0%

Sea water temperature in January, °F

Show year:
2025
2024
2023

The average sea water temperature in January of 2025 was 41.0°F. The highest and lowest sea temperatures during the month were 42.8°F and 39.4°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

Sunniest months:
November 16 days
October 14 days
September 13 days
Warmest months:
July 78.5 °F
August 77.0 °F
June 72.7 °F
Warmest sea temp:
August 65.0 °F
July 63.3 °F
September 62.2 °F
Coldest months:
January 33.2 °F
February 34.2 °F
December 37.8 °F
Rainiest months:
July 3 days
April 3 days
August 2 days
Windiest months:
March 9.7 mph
January 9.7 mph
February 9.6 mph

Portsmouth on a weather map

Current weather
04:24
Portsmouth
+39°F
W 13 mph
Feels like: +32°F
Precip.: 100%
Places in USA:
Name
°F
Washington
+46°F
Hawaii
+73°F
Honolulu
+73°F
Las Vegas
+41°F
Los Angeles
+54°F
Miami
+68°F
Miami Beach
+77°F
Maui
+66°F
New York
+41°F
San Diego
+52°F
San Francisco
+46°F
Sarasota
+64°F
Tampa
+64°F
Houston
+43°F
Chicago
+25°F
all places
24 Hours Forecast
Portsmouth
Local time: 04:24
January 11, sunday
0600
37°F
S
11 mph
0900
36°F
S
8 mph
1200
36°F
E
4 mph
1500
39°F
E
9 mph
1800
39°F
E
14 mph
2100
34°F
E
13 mph
January 12, monday
0000
32°F
E
13 mph
0300
30°F
E
18 mph
Units of measurement: °C / °F