Measurements:
°C
°F
CURRENT WEATHER
20:40
Grand Isle
82°F
SW 13 mph
Feels like: 88°F
Precip: 70%
World Resorts USA Grand Isle Weather

7 Day Weather Forecast

10.05
mon
DAY
84°F
SW 14 mph
precip
42%
NIGHT
82°F
SW 17 mph
precip
58%
10.06
tue
DAY
82°F
SW 17 mph
precip
35%
NIGHT
82°F
SW 20 mph
precip
26%
10.07
wed
DAY
84°F
W 22 mph
precip
23%
NIGHT
82°F
W 22 mph
precip
24%
10.08
thu
DAY
82°F
W 24 mph
precip
80%
NIGHT
82°F
W 25 mph
precip
33%
10.09
fri
DAY
78°F
SW 39 mph
precip
82%
NIGHT
70°F
E 22 mph
precip
61%
10.10
sat
DAY
78°F
E 15 mph
precip
7%
NIGHT
76°F
NW 11 mph
precip
5%
10.11
sun
DAY
80°F
SW 11 mph
precip
3%
NIGHT
82°F
W 12 mph
precip
15%

Grand Isle Sea Water Temperature in October, °F

Select Year: 2025 2024 2023

The average sea surface temperature in October 2025 for Grand Isle was 26.7°F. The maximum and minimum values were 24.7°F and 29.3°F respectively.

Grand Isle on the Weather Map

Best Time to Visit Grand Isle
The most sunny months:
October 18 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
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