What is the weather in Grand Isle right now?

Current weather in Grand Isle is moderate rain.

Where can I find the hourly weather forecast for Grand Isle?

This page shows hourly weather forecast for Grand Isle, including temperature, wind, precipitation, humidity and cloud cover.

Is the weather forecast for Grand Isle updated regularly?

Weather data for Grand Isle is updated regularly with the latest available observations and forecasts.

Now · 2:16 AM

Grand Isle Weather & Hourly Forecast

United States · Maine · 04746

56°F

Moderate rain

Feels like: 51°F

💧 Humidity 99% 🌡 Pressure 29.62 inHg 💨 Wind 11 mph 👁 Visibility 1.3 mi ☁ Clouds 100% ☀️ UV index 0.0 · Low 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Grand Isle

Today

3:00 AM

Heavy rain

56° 💧 0.503 in 💨 8 mph H 99%29.56 inHg

6:00 AM

Overcast night

59° 💧 0.002 in 💨 9 mph H 99%29.50 inHg

9:00 AM

Sunny

65° 💧 0.009 in 💨 11 mph H 92%29.47 inHg

12:00 PM

Light rain

70° 💧 0.022 in 💨 13 mph H 61%29.44 inHg

3:00 PM

Light rain

67° 💧 0.014 in 💨 17 mph H 57%29.50 inHg

6:00 PM

Mostly cloudy

60° 💧 0.002 in 💨 13 mph H 63%29.56 inHg

9:00 PM

Mostly clear night

57° 💧 None 💨 10 mph H 61%29.62 inHg

Tomorrow

12:00 AM

Partly cloudy night

54° 💧 None 💨 11 mph H 67%29.65 inHg

3:00 AM

Clear night

51° 💧 None 💨 12 mph H 68%29.68 inHg

6:00 AM

Clear night

48° 💧 None 💨 10 mph H 73%29.74 inHg

9:00 AM

Mostly sunny

53° 💧 None 💨 15 mph H 60%29.77 inHg

12:00 PM

Mostly cloudy

55° 💧 None 💨 16 mph H 52%29.77 inHg

3:00 PM

Overcast

58° 💧 None 💨 15 mph H 49%29.77 inHg

6:00 PM

Sunny

56° 💧 None 💨 8 mph H 59%29.83 inHg

9:00 PM

Clear night

50° 💧 None 💨 7 mph H 70%29.88 inHg

Saturday

12:00 AM

Clear night

46° 💧 None 💨 4 mph H 83%29.94 inHg

Today

3:00 AM

Heavy rain

56° 💧 0.339 in 💨 8 mph H 99%29.56 inHg

4:00 AM

Moderate rain

57° 💧 0.145 in 💨 5 mph H 99%29.53 inHg

5:00 AM

Light rain

58° 💧 0.019 in 💨 8 mph H 99%29.50 inHg

6:00 AM

Overcast night

59° 💧 0.001 in 💨 9 mph H 99%29.50 inHg

7:00 AM

Sunny

61° 💧 0.000 in 💨 9 mph H 98%29.47 inHg

8:00 AM

Sunny

63° 💧 None 💨 11 mph H 97%29.47 inHg

9:00 AM

Sunny

65° 💧 0.002 in 💨 11 mph H 92%29.47 inHg

10:00 AM

Sunny

67° 💧 0.001 in 💨 12 mph H 79%29.47 inHg

11:00 AM

Light rain

69° 💧 0.006 in 💨 13 mph H 69%29.47 inHg

12:00 PM

Light rain

70° 💧 0.005 in 💨 13 mph H 61%29.44 inHg

1:00 PM

Light rain

69° 💧 0.008 in 💨 14 mph H 61%29.44 inHg

2:00 PM

Light rain

68° 💧 0.009 in 💨 15 mph H 62%29.47 inHg

3:00 PM

Light rain

67° 💧 0.005 in 💨 17 mph H 57%29.50 inHg

4:00 PM

Mostly sunny

65° 💧 0.003 in 💨 15 mph H 55%29.50 inHg

5:00 PM

Light rain

62° 💧 0.005 in 💨 15 mph H 61%29.56 inHg

6:00 PM

Mostly cloudy

60° 💧 0.002 in 💨 13 mph H 63%29.56 inHg

7:00 PM

Overcast night

59° 💧 None 💨 11 mph H 63%29.59 inHg

8:00 PM

Overcast night

58° 💧 None 💨 10 mph H 61%29.62 inHg

9:00 PM

Mostly clear night

57° 💧 None 💨 10 mph H 61%29.62 inHg

10:00 PM

Partly cloudy night

55° 💧 None 💨 10 mph H 64%29.65 inHg

11:00 PM

Partly cloudy night

54° 💧 None 💨 10 mph H 66%29.65 inHg

Tomorrow

12:00 AM

Partly cloudy night

54° 💧 None 💨 11 mph H 67%29.65 inHg

1:00 AM

Mostly clear night

53° 💧 None 💨 11 mph H 68%29.68 inHg

2:00 AM

Clear night

52° 💧 None 💨 12 mph H 68%29.68 inHg

3:00 AM

Clear night

51° 💧 None 💨 12 mph H 68%29.68 inHg

4:00 AM

Clear night

50° 💧 None 💨 12 mph H 69%29.71 inHg

5:00 AM

Clear night

49° 💧 None 💨 11 mph H 71%29.71 inHg

6:00 AM

Clear night

48° 💧 None 💨 10 mph H 73%29.74 inHg

7:00 AM

Sunny

49° 💧 None 💨 10 mph H 72%29.74 inHg

8:00 AM

Sunny

51° 💧 None 💨 11 mph H 68%29.77 inHg

9:00 AM

Mostly sunny

53° 💧 None 💨 15 mph H 60%29.77 inHg

10:00 AM

Overcast

54° 💧 None 💨 15 mph H 56%29.77 inHg

11:00 AM

Mostly cloudy

55° 💧 None 💨 16 mph H 52%29.77 inHg

12:00 PM

Mostly cloudy

55° 💧 None 💨 16 mph H 52%29.77 inHg

1:00 PM

Overcast

57° 💧 None 💨 15 mph H 51%29.77 inHg

2:00 PM

Overcast

58° 💧 None 💨 15 mph H 50%29.77 inHg

3:00 PM

Overcast

58° 💧 None 💨 15 mph H 49%29.77 inHg

4:00 PM

Partly cloudy

58° 💧 None 💨 13 mph H 49%29.80 inHg

5:00 PM

Mostly sunny

59° 💧 None 💨 11 mph H 51%29.80 inHg

6:00 PM

Sunny

56° 💧 None 💨 8 mph H 59%29.83 inHg

7:00 PM

Clear night

53° 💧 None 💨 7 mph H 66%29.85 inHg

8:00 PM

Clear night

51° 💧 None 💨 7 mph H 68%29.85 inHg

9:00 PM

Clear night

50° 💧 None 💨 7 mph H 70%29.88 inHg

10:00 PM

Mostly clear night

49° 💧 None 💨 6 mph H 74%29.91 inHg

11:00 PM

Mostly clear night

48° 💧 None 💨 5 mph H 79%29.94 inHg

Saturday

12:00 AM

Clear night

46° 💧 None 💨 4 mph H 83%29.94 inHg

1:00 AM

Clear night

46° 💧 None 💨 3 mph H 85%29.97 inHg

2:00 AM

Clear night

45° 💧 None 💨 4 mph H 86%29.97 inHg

3:00 AM

Clear night

45° 💧 None 💨 4 mph H 86%29.97 inHg

4:00 AM

Mostly clear night

44° 💧 None 💨 4 mph H 86%30.00 inHg

5:00 AM

Clear night

44° 💧 None 💨 3 mph H 87%30.00 inHg

6:00 AM

Clear night

43° 💧 None 💨 2 mph H 89%30.03 inHg

7:00 AM

Sunny

45° 💧 None 💨 2 mph H 89%30.06 inHg

8:00 AM

Sunny

51° 💧 None 💨 1 mph H 80%30.06 inHg

5:00 PM

Partly cloudy

70° 💧 None 💨 7 mph H 55%29.97 inHg

8:00 PM

Partly cloudy night

60° 💧 None 💨 7 mph H 69%29.97 inHg

11:00 PM

Partly cloudy night

58° 💧 None 💨 9 mph H 74%29.97 inHg

Sunday

2:00 AM

Partly cloudy night

55° 💧 None 💨 8 mph H 82%29.94 inHg

5:00 AM

Mostly cloudy night

53° 💧 None 💨 8 mph H 89%29.91 inHg

8:00 AM

Mostly cloudy

56° 💧 None 💨 7 mph H 86%29.88 inHg

11:00 AM

Overcast

67° 💧 None 💨 10 mph H 71%29.85 inHg

2:00 PM

Overcast

70° 💧 None 💨 8 mph H 74%29.80 inHg

5:00 PM

Light rain

69° 💧 None 💨 10 mph H 76%29.74 inHg

8:00 PM

Light rain

63° 💧 None 💨 6 mph H 98%29.74 inHg

11:00 PM

Light rain

62° 💧 None 💨 7 mph H 98%29.74 inHg

Monday

2:00 AM

Overcast night

59° 💧 None 💨 7 mph H 98%29.77 inHg

5:00 AM

Overcast night

56° 💧 None 💨 8 mph H 98%29.83 inHg

8:00 AM

Partly cloudy

55° 💧 None 💨 9 mph H 95%29.88 inHg

11:00 AM

Mostly sunny

59° 💧 None 💨 11 mph H 65%29.94 inHg

2:00 PM

Mostly sunny

61° 💧 None 💨 13 mph H 52%29.94 inHg

5:00 PM

Partly cloudy

58° 💧 None 💨 12 mph H 56%30.03 inHg

8:00 PM

Clear night

52° 💧 None 💨 7 mph H 72%30.09 inHg

11:00 PM

Clear night

51° 💧 None 💨 8 mph H 76%30.15 inHg

Tuesday

2:00 AM

Clear night

48° 💧 None 💨 6 mph H 85%30.18 inHg

5:00 AM

Clear night

45° 💧 None 💨 5 mph H 94%30.21 inHg

8:00 AM

Mostly sunny

50° 💧 None 💨 3 mph H 85%30.27 inHg

11:00 AM

Overcast

60° 💧 None 💨 3 mph H 63%30.24 inHg

2:00 PM

Overcast

65° 💧 None 💨 6 mph H 52%30.18 inHg

8:00 PM

Moderate rain

63° 💧 None 💨 12 mph H 58%30.09 inHg

Wednesday

2:00 AM

Overcast night

61° 💧 None 💨 15 mph H 73%29.94 inHg

8:00 AM

Overcast

61° 💧 None 💨 11 mph H 90%29.88 inHg

2:00 PM

Mostly cloudy

56° 💧 None 💨 10 mph H 92%30.03 inHg

8:00 PM

Partly cloudy night

65° 💧 None 💨 8 mph H 54%30.12 inHg

Thursday

2:00 AM

Clear night

54° 💧 None 💨 4 mph H 82%30.21 inHg

8:00 AM

Mostly sunny

47° 💧 None 💨 3 mph H 91%30.24 inHg

2:00 PM

Mostly sunny

51° 💧 None 💨 0 mph H 89%30.30 inHg

8:00 PM

Mostly clear night

67° 💧 None 💨 4 mph H 46%30.15 inHg

Friday

2:00 AM

Partly cloudy night

58° 💧 None 💨 6 mph H 69%30.06 inHg

8:00 AM

Overcast

54° 💧 None 💨 3 mph H 87%29.94 inHg

2:00 PM

Moderate rain

53° 💧 None 💨 6 mph H 98%29.85 inHg

8:00 PM

Overcast night

61° 💧 None 💨 8 mph H 63%29.83 inHg

Saturday

2:00 AM

Clear night

52° 💧 None 💨 5 mph H 85%29.88 inHg

8:00 AM

Sunny

46° 💧 None 💨 3 mph H 94%29.94 inHg

2:00 PM

Mostly sunny

50° 💧 None 💨 1 mph H 91%29.94 inHg

8:00 PM

Mostly cloudy night

64° 💧 None 💨 9 mph H 48%29.88 inHg

Sunday

2:00 AM

Partly cloudy night

55° 💧 None 💨 4 mph H 77%29.85 inHg

8:00 AM

Overcast

52° 💧 None 💨 4 mph H 87%29.83 inHg

2:00 PM

Overcast

51° 💧 None 💨 8 mph H 96%29.91 inHg

8:00 PM

Mostly clear night

58° 💧 None 💨 9 mph H 47%29.97 inHg

Monday

2:00 AM

Clear night

48° 💧 None 💨 6 mph H 77%30.06 inHg

8:00 AM

Sunny

43° 💧 None 💨 4 mph H 92%30.12 inHg

2:00 PM

Sunny

45° 💧 None 💨 6 mph H 87%30.18 inHg

8:00 PM

Partly cloudy night

55° 💧 None 💨 8 mph H 51%30.18 inHg

Tuesday

2:00 AM

Clear night

47° 💧 None 💨 7 mph H 73%30.24 inHg

8:00 AM

Sunny

42° 💧 None 💨 9 mph H 92%30.30 inHg

2:00 PM

Partly cloudy

45° 💧 None 💨 10 mph H 81%30.39 inHg

8:00 PM

Mostly cloudy night

54° 💧 None 💨 13 mph H 55%30.42 inHg

Wednesday

2:00 AM

Clear night

46° 💧 None 💨 4 mph H 77%30.50 inHg

8:00 AM

Sunny

42° 💧 None 💨 7 mph H 91%30.53 inHg

2:00 PM

Sunny

44° 💧 None 💨 5 mph H 84%30.59 inHg

8:00 PM

Mostly clear night

59° 💧 None 💨 6 mph H 49%30.50 inHg

Thursday

2:00 AM

Mostly cloudy night

48° 💧 None 💨 5 mph H 74%30.47 inHg

8:00 AM

Overcast

43° 💧 None 💨 3 mph H 88%30.45 inHg

2:00 PM

Overcast

45° 💧 None 💨 3 mph H 88%30.45 inHg

In Grand Isle and, more broadly, across the state of Maine: This evening, expect mostly cloudy skies with temperatures remaining mild, ranging from 64 to 67 degrees Fahrenheit. There is a strong likelihood of light rain, with total accumulation around 0.09 inches. Winds will be coming from the south at speeds up to 13 mph, with gusts reaching 35 mph. The rain may occur intermittently over the next few hours, so a light rain jacket might be helpful if you're heading outdoors. Be prepared for gusty conditions, especially if you plan to be outside for an extended period. Temperatures will remain steady through the evening, gradually cooling later at night.

15-Day Weather Outlook for Grand Isle

TomorrowTomorrow

Overcast 59°/48° 💧 None 💨 16 mph

Saturday, Sep 12Sat Sep 12

Mostly sunny 70°/43° 💧 0.532 in 💨 7 mph

Sunday, Sep 13Sun Sep 13

Light rain 70°/53° 💧 0.026 in 💨 10 mph

Monday, Sep 14Mon Sep 14

Light rain 63°/55° 💧 0.511 in 💨 13 mph

Tuesday, Sep 15Tue Sep 15

Mostly sunny 65°/45° 💧 None 💨 8 mph

Wednesday, Sep 16Wed Sep 16

Moderate rain 63°/56° 💧 0.139 in 💨 15 mph

Thursday, Sep 17Thu Sep 17

Partly cloudy 65°/47° 💧 None 💨 8 mph

Friday, Sep 18Fri Sep 18

Moderate rain 67°/53° 💧 0.508 in 💨 6 mph

Saturday, Sep 19Sat Sep 19

Overcast 61°/46° 💧 0.114 in 💨 8 mph

Sunday, Sep 20Sun Sep 20

Overcast 64°/51° 💧 0.096 in 💨 9 mph

Monday, Sep 21Mon Sep 21

Mostly sunny 58°/43° 💧 0.001 in 💨 9 mph

Tuesday, Sep 22Tue Sep 22

Partly cloudy 55°/42° 💧 0.004 in 💨 10 mph

Wednesday, Sep 23Wed Sep 23

Mostly cloudy 54°/42° 💧 0.003 in 💨 13 mph

Thursday, Sep 24Thu Sep 24

Mostly sunny 59°/43° 💧 None 💨 6 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Grand Isle

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Grand Isle

Hourly forecast · Updated every 2 hours

Fair

Nearest forecast value 3:00 AM

PM2.5 Fine particles Good 3,8µg/m³

Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.

PM10 Particulate matter Good 3,9µg/m³

Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.

O₃ Ozone Fair 73,7µg/m³

Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.

NO₂ Nitrogen dioxide Good 1,2µg/m³

A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.

Air quality is acceptable for most people.

UV & HEALTH

UV, Sun & Health Outlook in Grand Isle

Maximum daily UV Today, tomorrow and the following day show the maximum UV index forecast for each day.

0–2 Low 3–5 Moderate 6–7 High 8–10 Very high 11+ Extreme

Today UV 4,8Moderate 🙂Fair

Tomorrow UV 4,7Moderate 🙂Fair

Saturday UV 5,0Moderate 🙂Fair

Sunday UV 3,7Moderate 🙂Fair

Monday UV 4,0Moderate 😊Good

Tuesday UV 4,0Moderate —Unavailable

Wednesday UV 5,0Moderate —Unavailable

Hourly UV index today

7:00 AMUV 0,0 8:00 AMUV 0,5 9:00 AMUV 1,6 10:00 AMUV 2,8 11:00 AMUV 4,1 12:00 PMUV 4,8 1:00 PMUV 4,1 2:00 PMUV 3,1 3:00 PMUV 2,2 4:00 PMUV 1,7 5:00 PMUV 0,6 6:00 PMUV 0,1

Today's weather health advice Open today's recommendations.

Moderate UV risk

Sunglasses and sun protection are recommended for prolonged exposure.

Acceptable air quality

Air quality is acceptable for most people. Very sensitive people may want to reduce prolonged exertion.

Comfortable temperature conditions

Temperatures should feel comfortable for most people, with no particular heat or cold precautions needed.

Good conditions for outdoor activities

Outdoor activities can generally be enjoyed normally, with sun protection adjusted to the UV level.

WIND OUTLOOK

Hourly Wind Forecast for Grand Isle

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · GRAND ISLE, MAINE

Tonight's Stargazing & Shooting Stars

Local night-sky conditions and meteor activity for Jasper.

0/100Best-hour score

No good viewing window tonight Astronomical darkness exists, but current sky conditions are unfavorable.

☁ Cloud cover 100% Real hourly forecast for the best viewing hour.

☾ Moonlight 3% New Moon · Moon below the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 73° high at the best hour.

✦ Estimated visible meteors Poor visibility Meteor activity may occur above the clouds, but local viewing conditions are not suitable.

Chance ≥1 meteor in 30 minNot meaningful

UPCOMING METEOR PERIODSStart, peak and end dates · weather should be checked closer to the peak.

SEP 5–SEP 21

September ε-PerseidsStart SEP 5 · Peak SEP 9 · End SEP 21 · ZHR 8 · 6% Moon at peak

ACTIVE NOW

SEP 20–NOV 20

Southern TauridsStart SEP 20 · Peak NOV 5 · End NOV 20 · ZHR 7 · 20% Moon at peak

UPCOMING

OCT 2–NOV 7

OrionidsStart OCT 2 · Peak OCT 21 · End NOV 7 · ZHR 20 · 77% Moon at peak

UPCOMING

OCT 20–DEC 10

Northern TauridsStart OCT 20 · Peak NOV 12 · End DEC 10 · ZHR 5 · 7% Moon at peak

UPCOMING

Experimental local observing estimate. Weather values come from the hourly forecast already used on this page. Moon position and astronomical darkness are calculated locally from time and coordinates. Meteor-shower ZHR describes ideal conditions and is not the number of meteors a person should expect to see locally.

DISCOVER WEATHER NEARBY Weather in other cities

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Forecast data for Grand Isle were last refreshed today at 2:07 AM. The current forecast period extends through 12/09/2026 at 12:00 AM. Weather, air-quality and UV-index data are provided through WEATHER-INFO.COM. Forecasts are produced automatically from the latest available data and are subject to periodic technical checks. This service is intended for general weather information.