Average sea water temperature in July:
+87.2°F
| Minimum sea water temperature in July: | 91.2°F |
| Maximum sea water temperature in July: | 82.0°F |
Daily sea water temperature in July, °F
Show year:
2026
2025
2024
The average sea water temperature in July of 2026 was 87.4°F. The highest and lowest sea temperatures during the month were 89.6°F and 85.1°F.
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| Grand Isle |
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| Grand Isle |
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Monthly sea water temperature in Grand Isle, °F
Which USA resorts have warmest sea in July?
| Place name | July 2026 | July 2025 |
|---|---|---|
| Key West | 88.5°F | 86.7°F |
| Clearwater Beach | 87.9°F | 87.1°F |
| Naples | 87.7°F | 86.6°F |
| Tampa | 87.6°F | 86.8°F |
| Sarasota | 87.6°F | 86.9°F |
| Cape Coral | 87.6°F | 86.4°F |
| Siesta Key | 87.6°F | 86.9°F |
| New Orleans | 87.5°F | 87.4°F |
| Miami | 87.4°F | 86.3°F |
| Miami Beach | 87.0°F | 86.0°F |
| Houston | 86.7°F | 86.3°F |
| Fort Lauderdale | 86.6°F | 85.0°F |
| Hilton Head Island | 86.3°F | 85.7°F |
| St. George Island | 86.3°F | 86.4°F |
| Tybee Island | 86.3°F | 85.4°F |
| Pensacola | 86.1°F | 86.9°F |
| Orange Beach | 86.1°F | 86.7°F |
| West Palm Beach | 86.1°F | 84.6°F |
| Kiawah Island | 86.0°F | 84.8°F |
| St. Simons Island | 86.0°F | 84.5°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: 01:02
September 23, wednesday
0300
84°F
W
4 mph
4 mph
0600
82°F
S
10 mph
10 mph
0900
82°F
SW
9 mph
9 mph
1200
86°F
W
5 mph
5 mph
1500
88°F
W
14 mph
14 mph
1800
86°F
W
12 mph
12 mph
2100
84°F
W
7 mph
7 mph
September 24, thursday
0000
84°F
W
6 mph
6 mph
