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 38.8°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 |
|---|---|---|
| Everglades | 77.4°F | 74.4°F |
| Kailua Kona | 77.2°F | 77.7°F |
| West Palm Beach | 77.1°F | 75.8°F |
| Miami Beach | 76.7°F | 75.3°F |
| Honolulu | 76.7°F | 76.8°F |
| Fort Lauderdale | 76.6°F | 75.8°F |
| Hawaii | 76.6°F | 76.7°F |
| Kauai | 76.5°F | 75.0°F |
| Key West | 76.4°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 |
| Cape Coral | 73.8°F | 71.7°F |
| Marco Island | 73.4°F | 71.8°F |
| South Padre Island | 72.6°F | 66.8°F |
| Naples | 72.5°F | 71.4°F |
| Corpus Christi | 71.8°F | 67.0°F |
| Tampa | 71.6°F | 69.3°F |
| Cocoa Beach | 71.6°F | 70.0°F |
| St. Petersburg | 71.2°F | 68.8°F |
Best time for vacation in Portsmouth
Portsmouth on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Portsmouth
Local time: 05:48
March 30, monday
0600
34°F
NE
12 mph
12 mph
0900
45°F
NE
13 mph
13 mph
1200
63°F
NE
14 mph
14 mph
1500
72°F
NE
14 mph
14 mph
1800
63°F
E
14 mph
14 mph
2100
55°F
NE
9 mph
9 mph
March 31, tuesday
0000
52°F
NE
6 mph
6 mph
0300
48°F
NE
5 mph
5 mph
