Average sea water temperature in May:
+82.1°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 84.0°F. The highest and lowest sea temperatures during the month were 86.9°F and 81.5°F.
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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 |
|---|---|---|
| Everglades | 84.8°F | 84.5°F |
| Key Largo | 84.1°F | 83.5°F |
| Key West | 84.0°F | 83.5°F |
| Miami | 82.9°F | 82.6°F |
| Cape Coral | 82.6°F | 83.4°F |
| Hialeah | 82.4°F | 82.3°F |
| Marco Island | 82.1°F | 83.5°F |
| Miami Beach | 82.1°F | 82.4°F |
| Naples | 81.9°F | 83.5°F |
| Fort Lauderdale | 80.9°F | 81.1°F |
| West Palm Beach | 80.9°F | 81.1°F |
| Tampa | 80.4°F | 82.7°F |
| St. Petersburg | 80.3°F | 82.6°F |
| Sarasota | 80.0°F | 82.7°F |
| Siesta Key | 79.8°F | 82.5°F |
| Clearwater Beach | 79.8°F | 82.6°F |
| Cocoa Beach | 78.7°F | 79.4°F |
| Corpus Christi | 78.4°F | 80.9°F |
| Hilo | 78.1°F | 77.7°F |
| Honolulu | 78.0°F | 78.1°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: 18:42
May 16, saturday
2100
82°F
W
15 mph
15 mph
May 17, sunday
0000
82°F
W
17 mph
17 mph
0300
82°F
NW
16 mph
16 mph
0600
81°F
W
13 mph
13 mph
0900
82°F
W
16 mph
16 mph
1200
82°F
W
17 mph
17 mph
1500
82°F
W
16 mph
16 mph
1800
82°F
W
18 mph
18 mph
