Weather in Grand Isle in Summer
| June | July | August | ||||
| Average day temperature: | 83.7°F | 85.3°F | 85.9°F | |||
| Average night temperature: | 80.9°F | 82.9°F | 83.4°F | |||
| Sea water temperature: | 84.8°F | 87.0°F | 88.0°F | |||
| Number of sunny days: | 8 days | 5 days | 9 days | |||
| Day length: | 13.9 - 14.0 h. | 13.5 - 14.0 h. | 12.8 - 13.5 h. | |||
| Number of rainy days: | 4 days | 6 days | 5 days | |||
| Precipitation totals: | 2.4 in. | 2.6 in. | 2.8 in. | |||
current
weather
weather
| Grand Isle |
monthly
weather
weather
| Grand Isle |
sea water
temperature
temperature
| Grand Isle |
14 days
forecast
forecast
| Grand Isle |
Day & Night air temperature, °F
June
July
August
0
14
28
42
56
70
84
98
112
85.9
85.3
83.7
83.4
82.9
80.9
| Day temperature | Night temperature |
Sea water temperature, °F
June
July
August
0
15
30
45
60
75
90
105
88
87
84.8
Precipitation total, in.
June
July
August
0.0
0.5
1.0
1.5
1.9
2.4
2.9
3.4
2.8
2.6
2.4
Sunny, partly cloudy and cloudy days
June
July
August
0
5
10
15
20
25
30
35
9
9
8
13
17
14
9
5
8
| Cloudy days | Partly cloudy days | Sunny days |
weather in
winter
winter
| Grand Isle |
weather in
spring
spring
| Grand Isle |
weather in
summer
summer
| Grand Isle |
weather in
autumn
autumn
| Grand Isle |
Wind speed, mph
June
July
August
0.0
1.8
3.6
5.5
7.3
9.1
10.9
12.7
14.6
9.4
8.7
10.6
Average sunny hours
June
July
August
0
1
2
3
4
5
6
7
8
9
7.3
7
7.8
Sunny hours are calculated based on the average daily number of hours while sunlight can reach the ground. It depends on day length and cloudiness during the day.
Best time for vacation in Grand Isle
Grand Isle on a weather map
Leaflet | Tiles © Esri
Places in USA:
Name
°F
24 Hours Forecast
Grand Isle
Local time: 02:59
April 17, thursday
0300
70°F
N
9 mph
9 mph
0600
70°F
NW
10 mph
10 mph
0900
70°F
NW
12 mph
12 mph
1200
72°F
NW
15 mph
15 mph
1500
72°F
NW
14 mph
14 mph
1800
72°F
NW
13 mph
13 mph
2100
72°F
N
15 mph
15 mph
April 18, friday
0000
72°F
N
16 mph
16 mph
