Average sea water temperature in January:
+41.7°F
| Minimum sea water temperature in January: | 45.9°F |
| Maximum sea water temperature in January: | 39.4°F |
Daily sea water temperature in January, °F
Show year:
2025
2024
2023
The average sea water temperature in January of 2025 was 41.0°F. The highest and lowest sea temperatures during the month were 42.8°F and 39.4°F.
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Monthly sea water temperature in Portsmouth, °F
Which USA resorts have warmest sea in January?
| Place name | January 2025 | January 2024 |
|---|---|---|
| Kailua Kona | 78.2°F | 77.6°F |
| Honolulu | 77.6°F | 76.6°F |
| Hawaii | 77.5°F | 76.5°F |
| Maui | 76.9°F | 76.8°F |
| Oahu | 76.5°F | 75.6°F |
| Princeville | 75.2°F | 76.1°F |
| Fort Lauderdale | 75.1°F | 75.9°F |
| Kauai | 75.0°F | 76.0°F |
| Miami Beach | 73.1°F | 74.8°F |
| Islamorada | 71.3°F | 74.0°F |
| Key Largo | 71.1°F | 73.8°F |
| Miami | 70.7°F | 73.1°F |
| Key West | 70.3°F | 72.7°F |
| Everglades | 68.6°F | 71.6°F |
| South Padre Island | 66.7°F | 64.8°F |
| Marco Island | 65.2°F | 67.2°F |
| Naples | 64.7°F | 66.8°F |
| Cape Coral | 64.3°F | 66.2°F |
| Corpus Christi | 61.6°F | 60.3°F |
| Siesta Key | 61.5°F | 63.4°F |
Best time for vacation in Portsmouth
Portsmouth on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Portsmouth
Local time: 02:52
December 05, friday
0300
10°F
SE
11 mph
11 mph
0600
9°F
E
6 mph
6 mph
0900
12°F
E
6 mph
6 mph
1200
19°F
NE
7 mph
7 mph
1500
25°F
NE
10 mph
10 mph
1800
25°F
NE
6 mph
6 mph
2100
21°F
NE
6 mph
6 mph
December 06, saturday
0000
19°F
NE
6 mph
6 mph
