Measurements:
°C
°F
CURRENT WEATHER
00:23
Grand Isle
88°F
NE 8 mph
Feels like: 98°F
Precip: 11%
World Resorts USA Grand Isle Weather

7 Day Weather Forecast

06.25
thu
DAY
90°F
NE 4 mph
precip
5%
NIGHT
88°F
N 8 mph
precip
6%
06.26
fri
DAY
88°F
N 11 mph
precip
8%
NIGHT
88°F
N 12 mph
precip
6%
06.27
sat
DAY
88°F
N 12 mph
precip
6%
NIGHT
88°F
N 10 mph
precip
11%
06.28
sun
DAY
88°F
NW 7 mph
precip
6%
NIGHT
88°F
NE 7 mph
precip
5%
06.29
mon
DAY
88°F
NW 4 mph
precip
7%
NIGHT
84°F
N 7 mph
precip
8%
06.30
tue
DAY
88°F
W 4 mph
precip
6%
NIGHT
88°F
SW 4 mph
precip
45%
07.01
wed
DAY
84°F
NW 10 mph
precip
63%
NIGHT
86°F
NW 8 mph
precip
7%

Grand Isle Sea Water Temperature in June, °F

Select Year: 2026 2025 2024

The average sea surface temperature in June 2026 for Grand Isle was 29.4°F. The maximum and minimum values were 27.8°F and 30.8°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 13 mph
March 12 mph
more details