Current sea water temperature:
+37.4°F
| Minimum sea water temperature in February: | 41.9°F |
| Maximum sea water temperature in February: | 36.5°F |
| Average sea water temperature in February: | 39.1°F |
| more information | |
14 days
forecast
forecast
| Portsmouth |
monthly
weather
weather
| Portsmouth |
Sea water temperature for the last 10 days:
| February 5 | 37.4°F | January 31 | 37.8°F |
| February 4 | 38.7°F | January 30 | 39.2°F |
| February 3 | 38.3°F | January 29 | 39.4°F |
| February 2 | 38.5°F | January 28 | 40.5°F |
| February 1 | 37.4°F | January 27 | 40.1°F |
Monthly sea water temperature, °F
When is the warmest sea in Portsmouth?
Based on the data about daily sea water temperature for the last three years the warmest sea in Portsmouth was noticed in August, July and September.
Monthly Sea Temperatures in Portsmouth, °F
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 63.3°F. The highest and lowest sea temperatures during the month were 65.3°F and 59.7°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 63.1°F. The highest and lowest sea temperatures during the month were 67.8°F and 60.6°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 61.1°F. The highest and lowest sea temperatures during the month were 63.3°F and 57.6°F.
current
weather
weather
| Portsmouth |
weather in
February
February
| Portsmouth |
Best time for vacation in Portsmouth
Portsmouth on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Portsmouth
Local time: 23:01
February 06, friday
0000
14°F
S
4 mph
4 mph
0300
12°F
S
6 mph
6 mph
0600
14°F
SW
7 mph
7 mph
0900
18°F
SW
7 mph
7 mph
1200
23°F
SW
6 mph
6 mph
1500
25°F
SW
5 mph
5 mph
1800
23°F
SW
4 mph
4 mph
2100
23°F
W
2 mph
2 mph
