Average sea water temperature in March:
+39.4°F
| Minimum sea water temperature in March: | 41.5°F |
| Maximum sea water temperature in March: | 35.4°F |
Daily sea water temperature in March, °F
Show year:
2026
2025
2024
The average sea water temperature in March of 2026 was 37.5°F. The highest and lowest sea temperatures during the month were 39.0°F and 35.4°F.
sea water
temperature
temperature
| Portsmouth |
monthly
weather
weather
| Portsmouth |
current
weather
weather
| Portsmouth |
14 days
forecast
forecast
| Portsmouth |
Monthly sea water temperature in Portsmouth, °F
Which USA resorts have warmest sea in March?
| Place name | March 2026 | March 2025 |
|---|---|---|
| Everglades | 77.4°F | 74.4°F |
| Kailua Kona | 77.2°F | 77.7°F |
| West Palm Beach | 77.1°F | 75.8°F |
| Key Largo | 76.8°F | 75.1°F |
| Miami Beach | 76.8°F | 75.3°F |
| Honolulu | 76.7°F | 76.8°F |
| Fort Lauderdale | 76.6°F | 75.8°F |
| Hawaii | 76.5°F | 76.7°F |
| Kauai | 76.5°F | 75.0°F |
| Key West | 76.5°F | 74.5°F |
| Miami | 76.0°F | 74.4°F |
| Kahului | 75.7°F | 76.3°F |
| Maui | 75.5°F | 76.0°F |
| Oahu | 74.9°F | 75.7°F |
| Cape Coral | 73.9°F | 71.7°F |
| Marco Island | 73.5°F | 71.8°F |
| Naples | 72.6°F | 71.4°F |
| Corpus Christi | 71.9°F | 67.0°F |
| Tampa | 71.7°F | 69.3°F |
| Cocoa Beach | 71.7°F | 70.0°F |
Best time for vacation in Portsmouth
Portsmouth on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Portsmouth
Local time: 09:41
April 29, wednesday
1200
52°F
W
9 mph
9 mph
1500
50°F
W
6 mph
6 mph
1800
46°F
W
9 mph
9 mph
2100
45°F
W
9 mph
9 mph
April 30, thursday
0000
45°F
S
2 mph
2 mph
0300
45°F
S
2 mph
2 mph
0600
45°F
SW
2 mph
2 mph
0900
46°F
W
4 mph
4 mph
