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.
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Monthly sea water temperature in Portsmouth, °F
Which USA resorts have warmest sea in March?
| Place name | March 2026 | March 2025 |
|---|---|---|
| Kailua Kona | 77.2°F | 77.7°F |
| West Palm Beach | 77.1°F | 75.8°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 |
| Maui | 75.5°F | 76.0°F |
| Oahu | 74.9°F | 75.7°F |
| South Padre Island | 72.7°F | 66.8°F |
| Naples | 72.6°F | 71.4°F |
| Corpus Christi | 71.9°F | 67.0°F |
| Tampa | 71.7°F | 69.3°F |
| St. Petersburg | 71.2°F | 68.8°F |
| Sarasota | 70.6°F | 68.6°F |
| Clearwater Beach | 70.2°F | 67.6°F |
| Siesta Key | 70.1°F | 68.5°F |
| Houston | 69.4°F | 64.6°F |
Best time for vacation in Portsmouth
Portsmouth on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Portsmouth
Local time: 17:13
July 22, wednesday
1800
81°F
E
11 mph
11 mph
2100
68°F
E
12 mph
12 mph
July 23, thursday
0000
64°F
SE
9 mph
9 mph
0300
57°F
E
6 mph
6 mph
0600
55°F
SE
7 mph
7 mph
0900
66°F
S
6 mph
6 mph
1200
73°F
SW
1 mph
1 mph
1500
75°F
NW
4 mph
4 mph
