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 |
| 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 |
| 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 |
| Corpus Christi | 79.5°F | 80.9°F |
| Kailua Kona | 79.4°F | 79.1°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 |
| New Orleans | 78.0°F | 79.5°F |
| Honolulu | 78.0°F | 78.1°F |
| Hawaii | 77.9°F | 78.0°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: 19:17
July 23, thursday
2100
86°F
NW
11 mph
11 mph
July 24, friday
0000
86°F
NW
14 mph
14 mph
0300
86°F
N
11 mph
11 mph
0600
84°F
N
7 mph
7 mph
0900
84°F
NW
7 mph
7 mph
1200
84°F
NW
9 mph
9 mph
1500
84°F
NW
11 mph
11 mph
1800
84°F
N
10 mph
10 mph
