Current sea water temperature:
+86.7°F
| Minimum sea water temperature in July: | 91.2°F |
| Maximum sea water temperature in July: | 82.0°F |
| Average sea water temperature in July: | 87.2°F |
| more information | |
14 days
forecast
forecast
| Grand Isle |
monthly
weather
weather
| Grand Isle |
Sea water temperature for the last 10 days:
| July 23 | 86.7°F | July 18 | 86.2°F |
| July 22 | 86.9°F | July 17 | 85.6°F |
| July 21 | 86.5°F | July 16 | 87.4°F |
| July 20 | 86.0°F | July 15 | 86.9°F |
| July 19 | 88.0°F | July 14 | 86.9°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:
2026
2025
2024
The average sea water temperature in July of 2026 was 87.6°F. The highest and lowest sea temperatures during the month were 89.6°F and 85.6°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
July
July
| 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: 18:18
July 23, thursday
2100
86°F
N
12 mph
12 mph
July 24, friday
0000
86°F
NW
12 mph
12 mph
0300
82°F
N
11 mph
11 mph
0600
82°F
N
5 mph
5 mph
0900
84°F
NW
6 mph
6 mph
1200
84°F
NW
8 mph
8 mph
1500
84°F
NW
12 mph
12 mph
1800
86°F
N
9 mph
9 mph
