World Resorts USA Grand Isle Weather

Grand Isle 7 Days Forecast

14.10
wed
Day
79°F
W 6 mph
Precip.
7%
Night
79°F
NW 13 mph
Precip.
8%
15.10
thu
Day
79°F
NW 11 mph
Precip.
6%
Night
79°F
W 11 mph
Precip.
10%
16.10
fri
Day
79°F
S 6 mph
Precip.
19%
Night
77°F
S 27 mph
Precip.
4%
17.10
sat
Day
66°F
SW 22 mph
Precip.
2%
Night
70°F
SW 17 mph
Precip.
3%
18.10
sun
Day
75°F
W 19 mph
Precip.
24%
Night
77°F
W 19 mph
Precip.
22%
19.10
mon
Day
79°F
W 21 mph
Precip.
16%
Night
77°F
W 17 mph
Precip.
9%
20.10
tue
Day
79°F
SW 17 mph
Precip.
12%
Night
75°F
SW 13 mph
Precip.
26%

Sea water temperature in October, °F

Show year:
2025
2024
2023

The average sea water temperature in October of 2025 was 80.1°F. The highest and lowest sea temperatures during the month were 84.7°F and 76.5°F.

Air temperature in Grand Isle, °F

Precipitation total in Grand Isle, in.

* Charts above show average data for the last 3 years.

Best time for vacation in Grand Isle

Sunniest months:
October 18 days
November 14 days
September 14 days
Warmest months:
August 85.7 °F
July 85.4 °F
June 83.7 °F
Warmest sea temp:
August 88.0 °F
July 87.2 °F
June 85.1 °F
Coldest months:
January 58.3 °F
February 60.8 °F
December 62.4 °F
Rainiest months:
August 4 days
July 4 days
June 3 days
Windiest months:
January 13.2 mph
April 13.2 mph
March 12.9 mph

Grand Isle on a weather map

Current weather
07:49
Grand Isle
+79°F
W 7 mph
Feels like: +82°F
Precip.: 7%
Places in USA:
Name
°F
Boston
+64°F
Washington
+70°F
Hawaii
+75°F
Las Vegas
+52°F
Los Angeles
+68°F
Miami
+82°F
Maui
+64°F
Myrtle Beach
+72°F
New York
+70°F
San Diego
+68°F
San Francisco
+57°F
Santa Monica
+64°F
Sarasota
+77°F
Tampa
+77°F
Chicago
+63°F
all places
24 Hours Forecast
Grand Isle
Local time: 07:49
October 14, wednesday
0900
79°F
W
7 mph
1200
79°F
W
6 mph
1500
79°F
NW
8 mph
1800
79°F
NW
7 mph
2100
79°F
W
13 mph
October 15, thursday
0000
79°F
NW
13 mph
0300
79°F
NW
11 mph
0600
79°F
W
11 mph
Units of measurement: °C / °F