Average sea water temperature in May:
+82.2°F
| Minimum sea water temperature in May: | 90.0°F |
| Maximum sea water temperature in May: | 77.7°F |
Daily sea water temperature in May, °F
Show year:
2026
2025
2024
The average sea water temperature in May of 2026 was 84.3°F. The highest and lowest sea temperatures during the month were 86.9°F and 81.5°F.
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| Key West |
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Monthly sea water temperature in Key West, °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 |
| Tampa | 81.9°F | 82.7°F |
| West Palm Beach | 81.7°F | 81.1°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 |
| Orlando | 78.4°F | 77.2°F |
| Houston | 78.4°F | 79.5°F |
| Daytona Beach | 78.1°F | 76.0°F |
| New Orleans | 78.0°F | 79.5°F |
| Honolulu | 78.0°F | 78.1°F |
| Hawaii | 77.9°F | 78.0°F |
| St. George Island | 77.8°F | 79.2°F |
| Maui | 77.0°F | 77.5°F |
| Panama City Beach | 76.8°F | 79.0°F |
Best time for vacation in Key West
Key West on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Key West
Local time: 14:05
August 05, wednesday
1500
86°F
W
11 mph
11 mph
1800
81°F
W
12 mph
12 mph
2100
82°F
W
14 mph
14 mph
August 06, thursday
0000
79°F
W
17 mph
17 mph
0300
86°F
W
19 mph
19 mph
0600
86°F
W
17 mph
17 mph
0900
86°F
W
17 mph
17 mph
1200
86°F
W
17 mph
17 mph
