Measurements:
°C
°F
CURRENT WEATHER
14:26
Grand Isle
76°F
NW 16 mph
Feels like: 80°F
Precip: 0%
World Resorts USA Grand Isle Weather

7 Day Weather Forecast

04.23
thu
DAY
76°F
NW 16 mph
precip
0%
NIGHT
74°F
NW 14 mph
precip
0%
04.24
fri
DAY
76°F
NW 13 mph
precip
63%
NIGHT
76°F
N 11 mph
precip
0%
04.25
sat
DAY
78°F
NW 11 mph
precip
0%
NIGHT
76°F
N 9 mph
precip
0%
04.26
sun
DAY
78°F
N 13 mph
precip
0%
NIGHT
76°F
N 14 mph
precip
0%
04.27
mon
DAY
78°F
NW 15 mph
precip
0%
NIGHT
78°F
N 17 mph
precip
0%
04.28
tue
DAY
78°F
N 13 mph
precip
0%
NIGHT
78°F
NE 11 mph
precip
0%
04.29
wed
DAY
80°F
NE 12 mph
precip
0%
NIGHT
78°F
NE 11 mph
precip
0%

Grand Isle Sea Water Temperature in April, °F

Select Year: 2026 2025 2024

The average sea surface temperature in April 2026 for Grand Isle was 23.3°F. The maximum and minimum values were 22.1°F and 24.9°F respectively.

Grand Isle on the Weather Map

Best Time to Visit Grand Isle
The most sunny months:
October 18 days
September 15 days
November 14 days
The most warm months:
August 89.8 °F
July 89.3 °F
June 87.5 °F
Warmest sea temperature:
August 92.2 °F
July 91.3 °F
June 88.9 °F
The most cold months:
January 59.3 °F
February 62.0 °F
December 63.8 °F
The most rainy months:
July 5 days
June 4 days
August 4 days
The most windy months:
January 13 mph
April 12 mph
March 12 mph
more details