Average sea water temperature in March:
+39.7°F
| Minimum sea water temperature in March: | 41.5°F |
| Maximum sea water temperature in March: | 36.7°F |
Daily sea water temperature in March, °F
Show year:
2025
2024
2023
The average sea water temperature in March of 2025 was 38.3°F. The highest and lowest sea temperatures during the month were 39.9°F and 36.7°F.
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Monthly sea water temperature in Portsmouth, °F
Which USA resorts have warmest sea in March?
| Place name | March 2025 | March 2024 |
|---|---|---|
| Kailua Kona | 77.7°F | 76.5°F |
| Honolulu | 76.8°F | 75.8°F |
| Hawaii | 76.7°F | 75.7°F |
| Maui | 76.0°F | 75.1°F |
| West Palm Beach | 75.8°F | 76.6°F |
| Fort Lauderdale | 75.8°F | 75.7°F |
| Oahu | 75.7°F | 74.5°F |
| Miami Beach | 75.3°F | 76.0°F |
| Islamorada | 75.2°F | 77.3°F |
| Key Largo | 75.1°F | 76.9°F |
| Kauai | 75.0°F | 74.5°F |
| Key West | 74.5°F | 76.5°F |
| Everglades | 74.4°F | 77.3°F |
| Miami | 74.4°F | 75.5°F |
| Marco Island | 71.8°F | 74.5°F |
| Naples | 71.4°F | 73.8°F |
| Sanibel Island | 70.9°F | 73.0°F |
| Cocoa Beach | 70.0°F | 71.5°F |
| Tampa | 69.3°F | 71.7°F |
| St. Petersburg | 68.8°F | 71.8°F |
Best time for vacation in Portsmouth
Portsmouth on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Portsmouth
Local time: 20:48
December 30, tuesday
2100
21°F
E
17 mph
17 mph
December 31, wednesday
0000
19°F
E
17 mph
17 mph
0300
18°F
E
17 mph
17 mph
0600
18°F
E
13 mph
13 mph
0900
21°F
NE
12 mph
12 mph
1200
28°F
NE
14 mph
14 mph
1500
32°F
NE
11 mph
11 mph
1800
28°F
NE
9 mph
9 mph
