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 |
|---|---|---|
| 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 |
| Naples | 72.6°F | 71.4°F |
| Tampa | 71.7°F | 69.3°F |
| Cocoa Beach | 71.7°F | 70.0°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 |
| New Orleans | 67.3°F | 63.5°F |
| Pensacola Beach | 66.8°F | 65.1°F |
| Orlando | 66.6°F | 66.3°F |
Best time for vacation in Portsmouth
Portsmouth on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Portsmouth
Local time: 16:34
August 12, wednesday
1800
86°F
NE
4 mph
4 mph
2100
75°F
NE
6 mph
6 mph
August 13, thursday
0000
70°F
NE
5 mph
5 mph
0300
66°F
E
6 mph
6 mph
0600
63°F
NE
8 mph
8 mph
0900
70°F
NE
9 mph
9 mph
1200
79°F
E
5 mph
5 mph
1500
75°F
E
2 mph
2 mph
