Average sea water temperature in May:
+80.9°F
| Minimum sea water temperature in May: | 86.9°F |
| Maximum sea water temperature in May: | 76.5°F |
Daily sea water temperature in May, °F
Show year:
2026
2025
2024
The average sea water temperature in May of 2026 was 81.3°F. The highest and lowest sea temperatures during the month were 84.9°F and 77.2°F.
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| Siesta Key |
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Monthly sea water temperature in Siesta Key, °F
Which USA resorts have warmest sea in May?
| Place name | May 2026 | May 2025 |
|---|---|---|
| Key West | 84.3°F | 83.5°F |
| Key Largo | 84.0°F | 83.5°F |
| Miami | 83.3°F | 82.6°F |
| Cape Coral | 83.3°F | 83.4°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 |
| 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 |
| Port St. Lucie | 80.8°F | 78.9°F |
| Cocoa Beach | 80.4°F | 79.4°F |
| Corpus Christi | 79.5°F | 80.9°F |
| South Padre Island | 79.1°F | 80.0°F |
| Orlando | 78.4°F | 77.2°F |
| Houston | 78.4°F | 79.5°F |
| Daytona Beach | 78.1°F | 76.0°F |
Best time for vacation in Siesta Key
Siesta Key on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Siesta Key
Local time: 05:19
September 19, saturday
0600
77°F
W
7 mph
7 mph
0900
79°F
W
7 mph
7 mph
1200
84°F
W
5 mph
5 mph
1500
84°F
E
9 mph
9 mph
1800
86°F
SE
2 mph
2 mph
2100
82°F
W
5 mph
5 mph
September 20, sunday
0000
81°F
W
9 mph
9 mph
0300
79°F
W
9 mph
9 mph
