Grand Isle Weather: May
 |
Average Day Temperature: | 81.4°F |
|
Average Night Temperature: | 78.8°F |
|
Sea Water Temperature: | 83.1°F |
|
Number of Sunny Days: | 12 days |
| Sunshine Hours: | 13.3 - 13.9 hours | |
|
Number of Rainy Days: | 3 days |
| Precipitation Totals: | 1.9 in | |
| detailed information | ||
14 day weather
forecast
forecast
| Grand Isle |
Sea Water
Temperature
Temperature
| Grand Isle |
Air Temperature in May, °F
The highest day temperature in May 2026 was 84°F. The lowest night temperature was 66°F. The average values for day and night temperatures during May were 79.9°F и 79.4°F respectivly.
Grand Isle Water Sea Temperature in May, °F
The average sea surface temperature in May 2026 for Grand Isle was 82.7°F. The maximum and minimum values were 77.2°F and 89.6°F respectively.
Sunny, Cloudy and Gloomy days
You can expect various weather conditions during May. Be ready for sunny, cloudy or even gloomy days.
Precipitation Totals in May, in
Precipitation total in May for Grand Isle is 1.9 in.
Wind Speed in May, mph
The average wind speed in May is 11.6 mph.
Average Sunny Hours Per Day
We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Grand Isle in May is 8.1 hours.
Grand Isle on the Weather Map
USA Resorts:
NAME
F°
| Boston |  |
+90 |
| Chicago | |
+76 |
| Hawaii |  |
+78 |
| Honolulu | |
+78 |
| Houston |  |
+86 |
| Las Vegas | |
+92 |
| Los Angeles |  |
+70 |
| Maui | |
+70 |
| Miami | |
+82 |
| Miami Beach | |
+84 |
| New York | |
+94 |
| San Diego | |
+64 |
| San Francisco | |
+60 |
| Sarasota | |
+94 |
| Tampa | |
+92 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Grand Isle
Local time: 11:55
04 jun, thursday
| 1200 |  |
84°F | W 27 mph |
| 1500 |  |
84°F | W 29 mph |
| 1800 | |
84°F | W 27 mph |
| 2100 | |
82°F | W 25 mph |
05 jun, friday
| 0000 | |
82°F | W 24 mph |
| 0300 | |
82°F | W 25 mph |
| 0600 | |
82°F | NW 25 mph |
| 0900 | |
82°F | NW 20 mph |