Average sea water temperature in August:
+65.4°F
| Minimum sea water temperature in August: | 72.1°F |
| Maximum sea water temperature in August: | 59.7°F |
Daily sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 67.2°F. The highest and lowest sea temperatures during the month were 72.1°F and 64.4°F.
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Monthly sea water temperature in Portsmouth, °F
Which USA resorts have warmest sea in August?
| Place name | August 2026 | August 2025 |
|---|---|---|
| Key West | 88.8°F | 88.8°F |
| Key Largo | 88.4°F | 88.7°F |
| Naples | 88.1°F | 88.7°F |
| New Orleans | 88.0°F | 87.4°F |
| Houston | 87.8°F | 87.8°F |
| Cape Coral | 87.6°F | 88.7°F |
| Miami | 87.3°F | 88.1°F |
| Miami Beach | 87.1°F | 87.9°F |
| Sarasota | 87.1°F | 88.6°F |
| Siesta Key | 87.1°F | 88.6°F |
| Pensacola | 86.9°F | 86.5°F |
| Clearwater Beach | 86.8°F | 88.5°F |
| Tampa | 86.8°F | 88.6°F |
| Fort Lauderdale | 86.8°F | 87.2°F |
| St. George Island | 86.7°F | 86.5°F |
| Corpus Christi | 86.5°F | 87.0°F |
| West Palm Beach | 86.4°F | 86.8°F |
| Pensacola Beach | 86.4°F | 86.6°F |
| Orange Beach | 86.3°F | 86.5°F |
| Panama City Beach | 86.3°F | 86.2°F |
Best time for vacation in Portsmouth
Portsmouth on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Portsmouth
Local time: 23:05
September 28, monday
0000
55°F
SW
25 mph
25 mph
0300
55°F
SW
26 mph
26 mph
0600
55°F
SW
26 mph
26 mph
0900
55°F
SW
26 mph
26 mph
1200
55°F
SW
25 mph
25 mph
1500
55°F
SW
24 mph
24 mph
1800
54°F
SW
22 mph
22 mph
2100
54°F
S
18 mph
18 mph
