Weather in Grand Isle, ME
Updated 2026-09-26 10:00 local time · ZIP codes 04746
Overcast
No government weather alerts were returned for this location at the latest update.
Next hours
59°15% rain
62°3% rain65°11% rain66°10% rain67°9% rain68°10% rain
67°6% rain
66°5% rain61°14% rain
57°15% rain
55°9% rain53°12% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Key weather changes ahead
Weather insights for today
Rain chance stays relatively low over the next 12 hours (up to 15%).
It feels like 56°F with winds near 3 mph.
67°F, 6% rain chance and 6 mph wind.
Visibility is around 6 mi; gusts may reach 15 mph.
Current temperature is 59°F, wind 3 mph, rain chance up to 15%.
UV index is 2.
Local weather characteristics in Grand Isle
Maine has cold winters, mild summers and strong coastal influence in the east. Snow, nor'easters and rapid temperature changes are common in the colder season.
Grand Isle is part of the Northeast weather region. The forecast point is near 47.31°N latitude and 68.15°W longitude. Local temperature, wind and precipitation can still differ from nearby places, especially where terrain, coastlines or urban development create small-scale weather changes.
Grand Isle weather today
Overcast and 59°F in Grand Isle, ME. Today's high is 68°F with a 14% rain chance. Winds are around 3 mph with gusts near 5 mph. Relative humidity is 61%, pressure is 30.19 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Grand Isle
Sunrise is at 07:24 AM and sunset is at 07:22 PM. Tomorrow's forecast calls for Overcast with a high near 65°F and a low near 48°F. The maximum rain chance is 18%.