Current sea water temperature:
+89.1°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 3 | 89.1°F | June 28 | 88.3°F |
| July 2 | 89.6°F | June 27 | 88.0°F |
| July 1 | 88.9°F | June 26 | 86.7°F |
| June 30 | 87.8°F | June 25 | 86.2°F |
| June 29 | 88.7°F | June 24 | 85.6°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:
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: 03:11
July 03, friday
0600
84°F
W
2 mph
2 mph
0900
84°F
W
6 mph
6 mph
1200
84°F
NW
7 mph
7 mph
1500
86°F
NW
11 mph
11 mph
1800
84°F
NW
11 mph
11 mph
2100
84°F
N
7 mph
7 mph
July 04, saturday
0000
84°F
N
5 mph
5 mph
0300
82°F
N
4 mph
4 mph
