Measurements:
°C
°F
CURRENT WEATHER
02:05
Grand Isle
60°F
S 14 mph
Feels like: 58°F
Precip: 0%
World Resorts USA Grand Isle Weather

7 Day Weather Forecast

12.05
fri
DAY
54°F
S 10 mph
precip
0%
NIGHT
60°F
SW 9 mph
precip
0%
12.06
sat
DAY
60°F
S 17 mph
precip
0%
NIGHT
66°F
W 8 mph
precip
100%
12.07
sun
DAY
68°F
SW 7 mph
precip
100%
NIGHT
64°F
S 15 mph
precip
0%
12.08
mon
DAY
54°F
S 17 mph
precip
0%
NIGHT
54°F
SW 12 mph
precip
0%
12.09
tue
DAY
54°F
SW 9 mph
precip
0%
NIGHT
60°F
NW 11 mph
precip
0%
12.10
wed
DAY
70°F
NE 15 mph
precip
30%
NIGHT
64°F
W 12 mph
precip
0%
12.11
thu
DAY
64°F
W 13 mph
precip
52%
NIGHT
66°F
E 8 mph
precip
0%

Grand Isle Sea Water Temperature in December, °F

Select Year: 2024 2023 2022

The average sea surface temperature in December 2024 for Grand Isle was 18.8°F. The maximum and minimum values were 17.5°F and 21.0°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 59.5 °F
February 62.4 °F
December 64.4 °F
The most rainy months:
July 5 days
June 4 days
August 4 days
The most windy months:
January 13 mph
March 12 mph
April 12 mph
more details