Current sea water temperature:
+79.9°F
| Minimum sea water temperature in October: | 84.7°F |
| Maximum sea water temperature in October: | 69.6°F |
| Average sea water temperature in October: | 78.6°F |
| more information | |
14 days
forecast
forecast
| Grand Isle |
monthly
weather
weather
| Grand Isle |
Sea water temperature for the last 10 days:
| October 14 | 79.9°F | October 9 | 81.7°F |
| October 13 | 79.9°F | October 8 | 81.9°F |
| October 12 | 78.6°F | October 7 | 83.7°F |
| October 11 | 79.0°F | October 6 | 83.5°F |
| October 10 | 81.0°F | October 5 | 83.8°F |
Monthly sea water temperature, °F
When is the warmest sea in Grand Isle?
Based on the data about daily sea water temperature for the last three years the warmest sea in Grand Isle was noticed in August, July and June.
Monthly Sea Temperatures in Grand Isle, °F
Sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 87.7°F. The highest and lowest sea temperatures during the month were 90.7°F and 84.4°F.
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.
Sea water temperature in June, °F
Show year:
2026
2025
2024
The average sea water temperature in June of 2026 was 85.5°F. The highest and lowest sea temperatures during the month were 88.7°F and 82.0°F.
current
weather
weather
| Grand Isle |
weather in
October
October
| Grand Isle |
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: 07:12
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
