Average sea water temperature in May:
+79.8°F
| Minimum sea water temperature in May: | 85.6°F |
| Maximum sea water temperature in May: | 73.2°F |
Daily sea water temperature in May, °F
Show year:
2026
2025
2024
The average sea water temperature in May of 2026 was 79.4°F. The highest and lowest sea temperatures during the month were 85.6°F and 74.5°F.
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Monthly sea water temperature in Grand Isle, °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 |
| 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 |
| Galveston | 78.4°F | 79.6°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 |
Best time for vacation in Grand Isle
Grand Isle on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Grand Isle
Local time: 07:55
October 14, wednesday
0900
79°F
W
7 mph
7 mph
1200
79°F
W
6 mph
6 mph
1500
79°F
NW
8 mph
8 mph
1800
79°F
NW
7 mph
7 mph
2100
79°F
W
13 mph
13 mph
October 15, thursday
0000
79°F
NW
13 mph
13 mph
0300
79°F
NW
11 mph
11 mph
0600
79°F
W
11 mph
11 mph
