23.05
sat
sat
Day
79°F
NW 10 mph
Precip.
87%
87%
Night
81°F
N 11 mph
Precip.
0%
0%
24.05
sun
sun
Day
81°F
N 11 mph
Precip.
100%
100%
Night
79°F
W 17 mph
Precip.
0%
0%
25.05
mon
mon
Day
79°F
W 12 mph
Precip.
100%
100%
Night
81°F
NW 12 mph
Precip.
0%
0%
26.05
tue
tue
Day
75°F
NW 9 mph
Precip.
100%
100%
Night
81°F
NW 18 mph
Precip.
0%
0%
27.05
wed
wed
Day
81°F
NW 14 mph
Precip.
100%
100%
Night
81°F
NW 11 mph
Precip.
0%
0%
28.05
thu
thu
Day
77°F
NW 7 mph
Precip.
100%
100%
Night
75°F
N 11 mph
Precip.
0%
0%
29.05
fri
fri
Day
81°F
N 6 mph
Precip.
72%
72%
Night
81°F
N 11 mph
Precip.
0%
0%
sea water
temperature
temperature
| Grand Isle |
monthly
weather
weather
| Grand Isle |
current
weather
weather
| Grand Isle |
14 days
forecast
forecast
| Grand Isle |
Sea water temperature in May, °F
Show year:
2026
2025
2024
The average sea water temperature in May of 2026 was 78.4°F. The highest and lowest sea temperatures during the month were 82.0°F and 74.5°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.
Air temperature in Grand Isle, °F
Precipitation total in Grand Isle, in.
* Charts above show average data for the last 3 years.
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: 18:41
May 23, saturday
2100
81°F
N
12 mph
12 mph
May 24, sunday
0000
81°F
N
11 mph
11 mph
0300
79°F
N
9 mph
9 mph
0600
79°F
N
12 mph
12 mph
0900
81°F
N
12 mph
12 mph
1200
81°F
N
11 mph
11 mph
1500
81°F
E
5 mph
5 mph
1800
79°F
SE
11 mph
11 mph
