Measurements:
°C
°F
CURRENT WEATHER
22:51
Grand Isle
74°F
W 14 mph
Feels like: 80°F
Precip: 7%
World Resorts USA Grand Isle Weather

7 Day Weather Forecast

10.26
mon
DAY
76°F
SW 19 mph
precip
31%
NIGHT
74°F
W 14 mph
precip
7%
10.27
tue
DAY
78°F
W 7 mph
precip
17%
NIGHT
74°F
W 13 mph
precip
10%
10.28
wed
DAY
76°F
SW 12 mph
precip
5%
NIGHT
74°F
W 12 mph
precip
19%
10.29
thu
DAY
76°F
SW 16 mph
precip
8%
NIGHT
76°F
W 8 mph
precip
12%
10.30
fri
DAY
78°F
W 12 mph
precip
22%
NIGHT
76°F
W 14 mph
precip
29%
10.31
sat
DAY
78°F
W 11 mph
precip
36%
NIGHT
78°F
NW 6 mph
precip
13%
11.01
sun
DAY
78°F
W 7 mph
precip
20%
NIGHT
78°F
NW 4 mph
precip
27%

Grand Isle Sea Water Temperature in October, °F

Select Year: 2026 2025 2024

The average sea surface temperature in October 2026 for Grand Isle was 26.6°F. The maximum and minimum values were 23.4°F and 29.3°F respectively.

Grand Isle on the Weather Map

Best Time to Visit Grand Isle
The most sunny months:
October 17 days
November 14 days
September 14 days
The most warm months:
August 89.7 °F
July 89.3 °F
June 87.5 °F
Warmest sea temperature:
August 92.2 °F
July 91.3 °F
June 89.0 °F
The most cold months:
January 59.3 °F
February 62.0 °F
December 63.8 °F
The most rainy months:
August 4 days
July 4 days
June 3 days
The most windy months:
January 13 mph
April 13 mph
March 12 mph
more details