Current sea water temperature:
+77.4°F
| Minimum sea water temperature in April: | 80.1°F |
| Maximum sea water temperature in April: | 66.2°F |
| Average sea water temperature in April: | 73.6°F |
| more information | |
14 days
forecast
forecast
| Grand Isle |
monthly
weather
weather
| Grand Isle |
Sea water temperature for the last 10 days:
| April 29 | 77.4°F | April 24 | 73.4°F |
| April 28 | 78.1°F | April 23 | 73.4°F |
| April 27 | 77.4°F | April 22 | 73.4°F |
| April 26 | 75.4°F | April 21 | 75.9°F |
| April 25 | 73.9°F | April 20 | 76.8°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:
2025
2024
2023
The average sea water temperature in August of 2025 was 87.9°F. The highest and lowest sea temperatures during the month were 90.1°F and 86.0°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 88.3°F. The highest and lowest sea temperatures during the month were 90.5°F and 86.2°F.
Sea water temperature in June, °F
Show year:
2025
2024
2023
The average sea water temperature in June of 2025 was 86.2°F. The highest and lowest sea temperatures during the month were 89.1°F and 83.5°F.
current
weather
weather
| Grand Isle |
weather in
May
May
| 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: 12:23
April 29, wednesday
1500
77°F
N
12 mph
12 mph
1800
77°F
NE
12 mph
12 mph
2100
77°F
NE
10 mph
10 mph
April 30, thursday
0000
75°F
E
6 mph
6 mph
0300
75°F
SE
4 mph
4 mph
0600
73°F
SE
3 mph
3 mph
0900
75°F
W
1 mph
1 mph
1200
77°F
NW
7 mph
7 mph
