Average sea water temperature in May:
+49.4°F
| Minimum sea water temperature in May: | 55.2°F |
| Maximum sea water temperature in May: | 43.2°F |
Daily sea water temperature in May, °F
Show year:
2026
2025
2024
The average sea water temperature in May of 2026 was 49.3°F. The highest and lowest sea temperatures during the month were 54.3°F and 45.5°F.
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Monthly sea water temperature in Portsmouth, °F
Which USA resorts have warmest sea in May?
| Place name | May 2026 | May 2025 |
|---|---|---|
| Key West | 84.3°F | 83.5°F |
| Miami | 83.3°F | 82.6°F |
| Naples | 82.9°F | 83.5°F |
| Miami Beach | 82.7°F | 82.4°F |
| St. Petersburg | 82.0°F | 82.6°F |
| Tampa | 81.9°F | 82.7°F |
| Fort Lauderdale | 81.7°F | 81.1°F |
| Clearwater Beach | 81.5°F | 82.6°F |
| Sarasota | 81.5°F | 82.7°F |
| Siesta Key | 81.3°F | 82.5°F |
| Cocoa Beach | 80.4°F | 79.4°F |
| Corpus Christi | 79.5°F | 80.9°F |
| Orlando | 78.4°F | 77.2°F |
| Houston | 78.4°F | 79.5°F |
| Daytona Beach | 78.1°F | 76.0°F |
| Hilo | 78.1°F | 77.7°F |
| New Orleans | 78.0°F | 79.5°F |
| Honolulu | 78.0°F | 78.1°F |
| Hawaii | 77.9°F | 78.0°F |
| Molokai | 77.7°F | 78.0°F |
Best time for vacation in Portsmouth
Portsmouth on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Portsmouth
Local time: 19:17
June 29, monday
2100
68°F
N
5 mph
5 mph
June 30, tuesday
0000
63°F
NE
6 mph
6 mph
0300
61°F
E
5 mph
5 mph
0600
61°F
NE
4 mph
4 mph
0900
73°F
NE
6 mph
6 mph
1200
82°F
N
6 mph
6 mph
1500
82°F
N
9 mph
9 mph
1800
81°F
N
7 mph
7 mph
