24.12
wed
wed
Day
63°F
W 9 mph
Precip.
0%
0%
Night
63°F
NW 8 mph
Precip.
0%
0%
25.12
thu
thu
Day
59°F
NW 7 mph
Precip.
0%
0%
Night
61°F
N 9 mph
Precip.
0%
0%
26.12
fri
fri
Day
66°F
NE 9 mph
Precip.
0%
0%
Night
66°F
NE 11 mph
Precip.
0%
0%
27.12
sat
sat
Day
68°F
N 8 mph
Precip.
0%
0%
Night
68°F
N 9 mph
Precip.
0%
0%
28.12
sun
sun
Day
70°F
N 7 mph
Precip.
49%
49%
Night
68°F
NE 6 mph
Precip.
0%
0%
29.12
mon
mon
Day
59°F
SW 22 mph
Precip.
0%
0%
Night
50°F
S 22 mph
Precip.
0%
0%
30.12
tue
tue
Day
46°F
S 20 mph
Precip.
0%
0%
Night
48°F
SW 12 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 December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 64.9°F. The highest and lowest sea temperatures during the month were 68.7°F and 61.3°F.
Sea water temperature in January, °F
Show year:
2025
2024
2023
The average sea water temperature in January of 2025 was 61.0°F. The highest and lowest sea temperatures during the month were 67.6°F and 56.7°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: 04:07
December 24, wednesday
0600
63°F
W
7 mph
7 mph
0900
64°F
W
9 mph
9 mph
1200
63°F
W
9 mph
9 mph
1500
63°F
NW
9 mph
9 mph
1800
63°F
NW
9 mph
9 mph
2100
61°F
NW
10 mph
10 mph
December 25, thursday
0000
63°F
NW
8 mph
8 mph
0300
61°F
NW
6 mph
6 mph
