18.03
wed
wed
Day
59°F
W 7 mph
Precip.
0%
0%
Night
63°F
W 8 mph
Precip.
0%
0%
19.03
thu
thu
Day
63°F
NW 6 mph
Precip.
0%
0%
Night
64°F
NE 6 mph
Precip.
0%
0%
20.03
fri
fri
Day
64°F
N 7 mph
Precip.
0%
0%
Night
64°F
NE 11 mph
Precip.
0%
0%
21.03
sat
sat
Day
66°F
NE 12 mph
Precip.
0%
0%
Night
68°F
NE 11 mph
Precip.
0%
0%
22.03
sun
sun
Day
72°F
NE 12 mph
Precip.
0%
0%
Night
68°F
NE 11 mph
Precip.
0%
0%
23.03
mon
mon
Day
72°F
NE 11 mph
Precip.
0%
0%
Night
68°F
SE 12 mph
Precip.
0%
0%
24.03
tue
tue
Day
66°F
W 6 mph
Precip.
0%
0%
Night
66°F
W 9 mph
Precip.
0%
0%
25.03
wed
wed
Day
68°F
W 12 mph
Precip.
100%
100%
Night
68°F
W 16 mph
Precip.
0%
0%
26.03
thu
thu
Day
70°F
NW 19 mph
Precip.
43%
43%
Night
70°F
NW 16 mph
Precip.
74%
74%
27.03
fri
fri
Day
72°F
NW 5 mph
Precip.
100%
100%
Night
50°F
S 34 mph
Precip.
0%
0%
28.03
sat
sat
Day
50°F
S 26 mph
Precip.
0%
0%
Night
55°F
SW 19 mph
Precip.
0%
0%
29.03
sun
sun
Day
61°F
W 14 mph
Precip.
0%
0%
Night
63°F
NW 13 mph
Precip.
0%
0%
30.03
mon
mon
Day
68°F
NW 18 mph
Precip.
0%
0%
Night
68°F
NW 25 mph
Precip.
41%
41%
31.03
tue
tue
Day
70°F
NW 24 mph
Precip.
100%
100%
Night
70°F
NW 30 mph
Precip.
0%
0%
sea water
temperature
temperature
| Grand Isle |
monthly
weather
weather
| Grand Isle |
current
weather
weather
| Grand Isle |
7 days
forecast
forecast
| Grand Isle |
Sea water temperature in March, °F
Show year:
2026
2025
2024
The average sea water temperature in March of 2026 was 70.7°F. The highest and lowest sea temperatures during the month were 74.7°F and 66.7°F.
Sea water temperature in April, °F
Show year:
2025
2024
2023
The average sea water temperature in April of 2025 was 75.2°F. The highest and lowest sea temperatures during the month were 80.1°F and 71.6°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: 16:38
March 18, wednesday
1800
63°F
W
9 mph
9 mph
2100
63°F
W
9 mph
9 mph
March 19, thursday
0000
63°F
W
8 mph
8 mph
0300
63°F
W
6 mph
6 mph
0600
63°F
SW
5 mph
5 mph
0900
63°F
W
6 mph
6 mph
1200
63°F
NW
6 mph
6 mph
1500
64°F
NW
6 mph
6 mph
