Weather in Grand Isle, ME
Updated 2026-08-11 12:15 local time · ZIP codes 04746
Sunny
No government weather alerts were returned for this location at the latest update.
Next hours
69°42% rain
71°9% rain73°5% rain73°5% rain73°5% rain
70°20% rain67°66% rain71°9% rain
63°9% rain62°10% rain61°11% rain61°16% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Weather insights for today
Rain chance reaches about 66% over the next 12 hours.
It feels like 69°F with winds near 9 mph.
73°F, 5% rain chance and 11 mph wind.
Visibility is around 6 mi; gusts may reach 16 mph.
Current temperature is 69°F, wind 9 mph, rain chance up to 66%.
UV index is 5. Sunscreen and sunglasses are sensible for longer outdoor time.
Grand Isle weather today
Sunny and 69°F in Grand Isle, ME. Today's high is 73°F with a 80% rain chance. Winds are around 9 mph with gusts near 14 mph. Relative humidity is 83%, pressure is 29.65 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Grand Isle
Sunrise is at 05:24 AM and sunset is at 07:51 PM. Tomorrow's forecast calls for Sunny with a high near 72°F and a low near 51°F. The maximum rain chance is 62%.