Current sea water temperature:
+67.5°F
| Minimum sea water temperature in January: | 73.2°F |
| Maximum sea water temperature in January: | 54.7°F |
| Average sea water temperature in January: | 62.2°F |
| more information | |
14 days
forecast
forecast
| Grand Isle |
monthly
weather
weather
| Grand Isle |
Sea water temperature for the last 10 days:
| January 13 | 67.5°F | January 8 | 67.8°F |
| January 12 | 69.4°F | January 7 | 67.6°F |
| January 11 | 70.5°F | January 6 | 66.6°F |
| January 10 | 69.8°F | January 5 | 66.9°F |
| January 9 | 68.9°F | January 4 | 68.2°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
January
January
| 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: 18:02
January 13, tuesday
2100
59°F
E
6 mph
6 mph
January 14, wednesday
0000
59°F
E
7 mph
7 mph
0300
59°F
E
9 mph
9 mph
0600
57°F
SE
9 mph
9 mph
0900
55°F
E
8 mph
8 mph
1200
57°F
E
14 mph
14 mph
1500
61°F
E
16 mph
16 mph
1800
61°F
E
18 mph
18 mph
