Average sea water temperature in July:
+63.6°F
| Minimum sea water temperature in July: | 70.3°F |
| Maximum sea water temperature in July: | 57.0°F |
Daily sea water temperature in July, °F
Show year:
2026
2025
2024
The average sea water temperature in July of 2026 was 65.8°F. The highest and lowest sea temperatures during the month were 70.2°F and 63.0°F.
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Monthly sea water temperature in Portsmouth, °F
Which USA resorts have warmest sea in July?
| Place name | July 2026 | July 2025 |
|---|---|---|
| Key West | 88.8°F | 86.7°F |
| Clearwater Beach | 88.6°F | 87.1°F |
| St. Petersburg | 88.4°F | 87.0°F |
| Tampa | 88.2°F | 86.8°F |
| Sarasota | 88.1°F | 86.9°F |
| Siesta Key | 88.1°F | 86.9°F |
| Naples | 88.0°F | 86.6°F |
| Miami | 87.6°F | 86.3°F |
| New Orleans | 87.2°F | 87.4°F |
| Miami Beach | 87.1°F | 86.0°F |
| Fort Lauderdale | 86.6°F | 85.0°F |
| Houston | 86.5°F | 86.3°F |
| Pensacola | 86.5°F | 86.9°F |
| Panama City Beach | 86.2°F | 86.3°F |
| Destin | 86.2°F | 86.3°F |
| West Palm Beach | 86.1°F | 84.6°F |
| Charleston (SC) | 85.6°F | 84.7°F |
| Corpus Christi | 85.4°F | 85.3°F |
| Isle of Palms | 85.3°F | 84.3°F |
| Jacksonville | 85.0°F | 80.4°F |
Best time for vacation in Portsmouth
Portsmouth on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Portsmouth
Local time: 15:24
July 21, tuesday
1800
77°F
NW
14 mph
14 mph
2100
68°F
NW
12 mph
12 mph
July 22, wednesday
0000
72°F
N
11 mph
11 mph
0300
68°F
NE
11 mph
11 mph
0600
66°F
N
8 mph
8 mph
0900
73°F
NE
11 mph
11 mph
1200
75°F
NE
9 mph
9 mph
1500
79°F
NE
11 mph
11 mph
