World Resorts USA Grand Isle Weather

Grand Isle 7 Days Forecast

03.07
fri
Day
84°F
NW 7 mph
Precip.
4%
Night
84°F
N 5 mph
Precip.
4%
04.07
sat
Day
84°F
NW 6 mph
Precip.
5%
Night
84°F
NE 6 mph
Precip.
5%
05.07
sun
Day
84°F
NW 7 mph
Precip.
58%
Night
84°F
NE 10 mph
Precip.
11%
06.07
mon
Day
86°F
N 9 mph
Precip.
5%
Night
82°F
NE 11 mph
Precip.
9%
07.07
tue
Day
86°F
N 7 mph
Precip.
4%
Night
84°F
NE 11 mph
Precip.
6%
08.07
wed
Day
86°F
N 8 mph
Precip.
4%
Night
84°F
NE 11 mph
Precip.
6%
09.07
thu
Day
86°F
NE 9 mph
Precip.
13%
Night
84°F
NE 12 mph
Precip.
7%

Sea water temperature in July, °F

Show year:
2025
2024
2023

The average sea water temperature in July of 2025 was 88.3°F. The highest and lowest sea temperatures during the month were 90.5°F and 86.2°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
September 15 days
November 14 days
Warmest months:
August 85.8 °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:
July 5 days
August 4 days
September 4 days
Windiest months:
January 13.2 mph
April 13.2 mph
March 12.9 mph

Grand Isle on a weather map

Current weather
03:10
Grand Isle
+84°F
NW 6 mph
Feels like: +93°F
Precip.: 6%
Places in USA:
Name
°F
Boston
+82°F
Hawaii
+77°F
Las Vegas
+77°F
Los Angeles
+59°F
Miami
+77°F
Miami Beach
+84°F
Maui
+72°F
Myrtle Beach
+77°F
New York
+84°F
San Diego
+63°F
San Francisco
+54°F
Sarasota
+77°F
Tampa
+79°F
Houston
+79°F
Chicago
+66°F
all places
24 Hours Forecast
Grand Isle
Local time: 03:10
July 03, friday
0600
84°F
W
2 mph
0900
84°F
W
6 mph
1200
84°F
NW
7 mph
1500
86°F
NW
11 mph
1800
84°F
NW
11 mph
2100
84°F
N
7 mph
July 04, saturday
0000
84°F
N
5 mph
0300
82°F
N
4 mph
Units of measurement: °C / °F