Weather in Grand Isle, LA
Updated 2026-08-11 11:15 local time · ZIP codes 70358
Partly cloudy
No government weather alerts were returned for this location at the latest update.
Next hours
88°7% rain
86°7% rain86°7% rain85°11% rain85°9% rain86°7% rain86°7% rain86°7% rain86°8% rain
86°8% rain86°7% rain86°9% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Weather insights for today
Rain chance stays relatively low over the next 12 hours (up to 11%).
It feels like 101°F with winds near 7 mph.
86°F, 7% rain chance and 9 mph wind.
Visibility is around 10 mi; gusts may reach 17 mph.
Current temperature is 88°F, wind 7 mph, rain chance up to 11%.
UV index is 8. Use shade, sunscreen, a hat and sunglasses.
Grand Isle weather today
Partly cloudy and 88°F in Grand Isle, LA. Today's high is 86°F with a 7% rain chance. Winds are around 7 mph with gusts near 9 mph. Relative humidity is 70%, pressure is 30.16 inHg, and visibility is about 10 miles.
Tonight and tomorrow in Grand Isle
Sunrise is at 06:26 AM and sunset is at 07:44 PM. Tomorrow's forecast calls for Patchy rain nearby with a high near 87°F and a low near 84°F. The maximum rain chance is 57%.