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As of 12:59 EDT

Weather in Grand Isle, ME

75°Current weather

Grand Isle, Sunday, 9 August, 12:59

Partly cloudy. Feels like 76°. High 79°, low 64°.

Pressure29.77 inHg
Wind7.7 mph SW
Humidity69%
Visibility6.2 mi
Dew point65°

10-day forecast for Grand Isle, ME: 47° to 79°, with precipitation expected on 7 days. The table below breaks each day into morning, afternoon, evening and overnight.

74°
Best day: Sunday, August 16
79° · 0.58 in
Worst day: Sunday, August 9

Tap any day below to see morning, afternoon, evening and overnight.

Mon, 1079° / 59°0.06Rain
MorningOvercast66°feels 66°
AfternoonOvercast76°feels 76°
EveningOvercast64°feels 64°
OvernightClear60°feels 60°
79 °Rain

Grand Isle, Monday, 10 August

Rain. High 79°, low 59°.

Pressure29.88 inHg
Wind7.9 mph W
Humidity46%
Visibility6.2 mi
Dew point55°
Tue, 1169° / 56°0.26Rain
MorningOvercast63°feels 63°
AfternoonLight rain68°feels 68°
EveningPartly cloudy60°feels 60°
OvernightLight rain60°feels 60°
69 °Rain

Grand Isle, Tuesday, 11 August

Rain. High 69°, low 56°.

Pressure29.68 inHg
Wind8.7 mph SW
Humidity87%
Visibility6.2 mi
Dew point64°
Wed, 1273° / 51°0Mostly clear
MorningClear60°feels 59°
AfternoonMostly clear73°feels 72°
EveningOvercast59°feels 59°
OvernightMostly clear53°feels 53°
73 °Mostly clear

Grand Isle, Wednesday, 12 August

Mostly clear. High 73°, low 51°.

Pressure29.68 inHg
Wind11.2 mph NW
Humidity47%
Visibility6.2 mi
Dew point50°
Thu, 1363° / 53°0.46Rain
MorningLight rain55°feels 55°
AfternoonRain61°feels 61°
EveningRain57°feels 57°
OvernightOvercast54°feels 54°
63 °Rain

Grand Isle, Thursday, 13 August

Rain. High 63°, low 53°.

Pressure29.59 inHg
Wind10 mph S
Humidity77%
Visibility6.2 mi
Dew point58°
Fri, 1458° / 51°0.38Rain
MorningRain52°feels 52°
AfternoonRain54°feels 54°
EveningRain55°feels 54°
OvernightRain57°feels 55°
58 °Rain

Grand Isle, Friday, 14 August

Rain. High 58°, low 51°.

Pressure29.53 inHg
Wind14.2 mph NW
Humidity97%
Visibility—
Dew point53°
Sat, 1570° / 55°0Overcast
MorningOvercast60°feels 58°
AfternoonOvercast66°feels 65°
EveningOvercast67°feels 65°
OvernightOvercast56°feels 54°
70 °Overcast

Grand Isle, Saturday, 15 August

Overcast. High 70°, low 55°.

Pressure29.88 inHg
Wind15 mph N
Humidity49%
Visibility—
Dew point45°
Sun, 1674° / 47°0Clear
MorningClear54°feels 52°
AfternoonClear70°feels 69°
EveningClear70°feels 69°
OvernightClear55°feels 53°
74 °Clear

Grand Isle, Sunday, 16 August

Clear. High 74°, low 47°.

Pressure30.06 inHg
Wind6.4 mph NW
Humidity46%
Visibility—
Dew point45°
Mon, 1770° / 56°0.11Light rain
MorningLight rain60°feels 59°
AfternoonLight rain65°feels 65°
EveningLight rain59°feels 59°
OvernightLight rain56°feels 56°
70 °Light rain

Grand Isle, Monday, 17 August

Light rain. High 70°, low 56°.

Pressure30.00 inHg
Wind7.9 mph S
Humidity59%
Visibility—
Dew point51°
Tue, 1869° / 52°0.06Light rain
MorningLight rain58°feels 58°
AfternoonLight rain67°feels 66°
EveningLight rain66°feels 65°
OvernightLight rain53°feels 52°
69 °Light rain

Grand Isle, Tuesday, 18 August

Light rain. High 69°, low 52°.

Pressure29.97 inHg
Wind8.4 mph S
Humidity68%
Visibility—
Dew point54°

About this forecast

How reliable is a 10-day forecast?

The first 3–5 days are the most reliable, typically within 2–4°. From day six to ten the models show the trend: the direction of change is right more often than the exact numbers.

What does the time-of-day table show?

Temperature in Grand Isle, ME around 8am, 2pm, 8pm and 2am each day — handy for planning a walk, a drive or work outdoors.

How is the best day chosen?

We weigh the daytime high against precipitation: a warm, dry day scores highest.