29.04
wed
wed
Day
77°F
N 11 mph
Precip.
0%
0%
Night
75°F
E 6 mph
Precip.
0%
0%
30.04
thu
thu
Day
77°F
W 2 mph
Precip.
0%
0%
Night
75°F
NW 11 mph
Precip.
0%
0%
01.05
fri
fri
Day
77°F
NW 16 mph
Precip.
100%
100%
Night
77°F
N 22 mph
Precip.
82%
82%
02.05
sat
sat
Day
68°F
S 19 mph
Precip.
100%
100%
Night
68°F
S 19 mph
Precip.
0%
0%
03.05
sun
sun
Day
68°F
SW 14 mph
Precip.
0%
0%
Night
70°F
SW 17 mph
Precip.
0%
0%
04.05
mon
mon
Day
72°F
W 9 mph
Precip.
0%
0%
Night
72°F
NW 6 mph
Precip.
0%
0%
05.05
tue
tue
Day
72°F
NW 13 mph
Precip.
0%
0%
Night
72°F
N 11 mph
Precip.
0%
0%
06.05
wed
wed
Day
75°F
NW 11 mph
Precip.
0%
0%
Night
75°F
N 12 mph
Precip.
0%
0%
07.05
thu
thu
Day
77°F
N 15 mph
Precip.
0%
0%
Night
79°F
NE 24 mph
Precip.
100%
100%
08.05
fri
fri
Day
81°F
SE 15 mph
Precip.
0%
0%
Night
72°F
S 18 mph
Precip.
0%
0%
09.05
sat
sat
Day
73°F
W 4 mph
Precip.
0%
0%
Night
75°F
NW 6 mph
Precip.
0%
0%
10.05
sun
sun
Day
77°F
NW 12 mph
Precip.
0%
0%
Night
77°F
NW 18 mph
Precip.
0%
0%
11.05
mon
mon
Day
77°F
NW 21 mph
Precip.
0%
0%
Night
77°F
NW 17 mph
Precip.
0%
0%
12.05
tue
tue
Day
77°F
NW 8 mph
Precip.
100%
100%
Night
77°F
SW 12 mph
Precip.
85%
85%
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 April, °F
Show year:
2026
2025
2024
The average sea water temperature in April of 2026 was 74.3°F. The highest and lowest sea temperatures during the month were 78.1°F and 71.8°F.
Sea water temperature in May, °F
Show year:
2025
2024
2023
The average sea water temperature in May of 2025 was 81.1°F. The highest and lowest sea temperatures during the month were 85.6°F and 76.5°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: 07:34
April 29, wednesday
0900
77°F
N
11 mph
11 mph
1200
77°F
N
11 mph
11 mph
1500
77°F
N
13 mph
13 mph
1800
77°F
N
13 mph
13 mph
2100
75°F
NE
10 mph
10 mph
April 30, thursday
0000
75°F
E
6 mph
6 mph
0300
75°F
SE
11 mph
11 mph
0600
75°F
N
9 mph
9 mph
