World Resorts USA Grand Isle Weather

Grand Isle 14 Days Forecast

23.05
sat
Day
79°F
NW 10 mph
Precip.
87%
Night
81°F
N 11 mph
Precip.
0%
24.05
sun
Day
81°F
N 11 mph
Precip.
100%
Night
79°F
W 17 mph
Precip.
0%
25.05
mon
Day
79°F
W 12 mph
Precip.
100%
Night
81°F
NW 12 mph
Precip.
0%
26.05
tue
Day
75°F
NW 9 mph
Precip.
100%
Night
81°F
NW 18 mph
Precip.
0%
27.05
wed
Day
81°F
NW 14 mph
Precip.
100%
Night
81°F
NW 11 mph
Precip.
0%
28.05
thu
Day
77°F
NW 7 mph
Precip.
100%
Night
75°F
N 11 mph
Precip.
0%
29.05
fri
Day
81°F
N 6 mph
Precip.
72%
Night
81°F
N 11 mph
Precip.
0%
30.05
sat
Day
81°F
W 7 mph
Precip.
100%
Night
77°F
SW 16 mph
Precip.
100%
31.05
sun
Day
79°F
SW 20 mph
Precip.
100%
Night
77°F
W 23 mph
Precip.
100%
01.06
mon
Day
79°F
W 19 mph
Precip.
100%
Night
77°F
W 17 mph
Precip.
0%
02.06
tue
Day
81°F
W 14 mph
Precip.
0%
Night
79°F
W 14 mph
Precip.
0%
03.06
wed
Day
81°F
W 14 mph
Precip.
43%
Night
79°F
W 11 mph
Precip.
58%
04.06
thu
Day
82°F
W 10 mph
Precip.
0%
Night
79°F
W 10 mph
Precip.
0%
05.06
fri
Day
82°F
W 8 mph
Precip.
0%
Night
81°F
NW 9 mph
Precip.
0%

Sea water temperature in May, °F

Show year:
2026
2025
2024

The average sea water temperature in May of 2026 was 78.4°F. The highest and lowest sea temperatures during the month were 82.0°F and 74.5°F.

Sea water temperature in June, °F

Show year:
2025
2024
2023

The average sea water temperature in June of 2025 was 86.2°F. The highest and lowest sea temperatures during the month were 89.1°F and 83.5°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
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 85.0 °F
Coldest months:
January 58.3 °F
February 60.8 °F
December 62.4 °F
Rainiest months:
July 5 days
June 4 days
August 4 days
Windiest months:
January 13.2 mph
April 13.2 mph
March 12.9 mph

Grand Isle on a weather map

Current weather
18:00
Grand Isle
+81°F
N 11 mph
Feels like: +86°F
Precip.: 76%
Places in USA:
Name
°F
Boston
+59°F
Hawaii
+75°F
Honolulu
+75°F
Las Vegas
+100°F
Los Angeles
+72°F
Miami
+84°F
Miami Beach
+84°F
Maui
+70°F
New York
+57°F
San Diego
+70°F
San Francisco
+64°F
Sarasota
+86°F
Tampa
+82°F
Houston
+75°F
Chicago
+55°F
all places
24 Hours Forecast
Grand Isle
Local time: 18:00
May 23, saturday
2100
81°F
N
12 mph
May 24, sunday
0000
81°F
N
11 mph
0300
79°F
N
9 mph
0600
79°F
N
12 mph
0900
81°F
N
12 mph
1200
81°F
N
11 mph
1500
81°F
E
5 mph
1800
79°F
SE
11 mph
Units of measurement: °C / °F