Nearby Harbors
44.2811’ N, 68.9428’ W

Islesboro, ME

51°
H 64°
L 61°
ENE
3mph
High tide
10:09 am
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Islesboro, ME Weather Forecast and Current Conditions

Day Sky High / Low Precip Wind Humidity
Wed
Sep 9 		Cloudy
Close Hourly 		64º / 61º 24% SE 11 mph 81%
7am Partly Cloudy 51º 2% ENE 3 mph 86%
8am Partly Cloudy 55º 2% E 4 mph 80%
9am Mostly Cloudy 57º 18% ESE 6 mph 77%
10am Showers 58º 35% SE 7 mph 77%
11am Cloudy 59º 2% SE 9 mph 79%
12pm Cloudy 60º 2% SE 10 mph 77%
1pm Cloudy 61º 5% SE 11 mph 78%
2pm Cloudy 61º 11% SSE 10 mph 78%
3pm Cloudy 62º 18% SSE 11 mph 79%
4pm Cloudy 62º 16% SSE 11 mph 84%
5pm Cloudy 63º 16% SSE 11 mph 88%
6pm Cloudy 63º 17% SSE 11 mph 89%
7pm Cloudy 62º 18% S 9 mph 93%
8pm Cloudy 63º 18% SSE 9 mph 96%
9pm Light Rain 63º 61% S 11 mph 96%
10pm Rain 63º 82% S 13 mph 95%
11pm Rain 63º 88% SSW 15 mph 97%
Thu
Sep 10 		Partly Cloudy
View Hourly 		79º / 52º 24% WSW 14 mph 69%
12am Rain 64º 99% SSW 17 mph 98%
1am Rain 64º 98% SSW 18 mph 98%
2am Rain 65º 81% SSW 19 mph 98%
3am Rain 65º 86% SSW 19 mph 97%
4am Rain 65º 69% SW 18 mph 97%
5am Showers 65º 43% SW 16 mph 96%
6am Showers 66º 37% SW 15 mph 95%
7am Partly Cloudy 66º 24% SW 13 mph 96%
8am Partly Cloudy 67º 20% SW 12 mph 94%
9am Partly Cloudy 69º 20% WSW 12 mph 90%
10am Partly Cloudy 71º 19% WSW 12 mph 84%
11am Partly Cloudy 74º 3% WSW 12 mph 72%
12pm Partly Cloudy 76º 2% WSW 13 mph 66%
1pm Partly Cloudy 76º 2% WSW 14 mph 62%
2pm Partly Cloudy 77º 1% WSW 14 mph 57%
3pm Partly Cloudy 78º 0% W 14 mph 51%
4pm Partly Cloudy 77º 0% W 14 mph 50%
5pm Partly Cloudy 75º 0% WNW 13 mph 52%
6pm Partly Cloudy 73º 0% WNW 13 mph 52%
7pm Partly Cloudy 71º 0% WNW 12 mph 55%
8pm Partly Cloudy 68º 0% NW 10 mph 59%
9pm Partly Cloudy 66º 1% NW 10 mph 62%
10pm Partly Cloudy 64º 1% NW 9 mph 66%
11pm Partly Cloudy 62º 2% WNW 7 mph 70%
Fri
Sep 11 		Sunny
View Hourly 		70º / 51º 2% WNW 12 mph 52%
12am Mostly Cloudy 60º 2% WNW 7 mph 72%
1am Partly Cloudy 59º 2% WNW 7 mph 72%
2am Partly Cloudy 59º 2% WNW 7 mph 70%
3am Clear 58º 2% WNW 8 mph 70%
4am Mostly Clear 56º 2% WNW 7 mph 72%
5am Clear 54º 2% WNW 7 mph 74%
6am Mostly Clear 53º 3% WNW 8 mph 76%
Sat
Sep 12 		Mostly Sunny 70º / 57º 4% SW 11 mph 64%
Sun
Sep 13 		PM Showers 69º / 58º 33% S 14 mph 81%
Mon
Sep 14 		Partly Cloudy 70º / 50º 14% NW 11 mph 66%
Tue
Sep 15 		Partly Cloudy 65º / 57º 17% SSE 12 mph 71%
Wed
Sep 16 		Partly Cloudy 73º / 56º 21% WSW 11 mph 74%

Weather Radar for Islesboro, ME See Radar

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* Playback displays weather for the past 6 hours.

NOAA Weather Marine Forecast for Islesboro, ME

Wednesday
High : 66ºF
Variable winds less than 5 kt becoming SSE 5 to 10 kt in the morning. Mostly cloudy. Seas 1 ft or less.
Wednesday Night
Low : 62ºF
S wind 10 to 13 kt becoming SSW 12 to 15 kt after midnight. Winds could gust as high as 30 kt. Showers, with thunderstorms also possible after 2am. Seas 1 ft or less.
Thursday
High : 76ºF
SW wind around 10 kt, with gusts as high as 20 kt. A chance of showers before 9am. Seas 1 ft or less.
Thursday Night
Low : 57ºF
NW wind 5 to 10 kt. Partly cloudy. Seas 1 ft or less.
Friday
High : 69ºF
WNW wind around 10 kt. Sunny. Seas 1 ft or less.
Friday Night
Low : 53ºF
Variable winds 5 kt or less. Clear. Seas 1 ft or less.
Saturday
High : 68ºF
Variable winds less than 5 kt becoming S 5 to 10 kt in the afternoon. Sunny. Seas 1 ft or less.
Saturday Night
Low : 56ºF
Variable winds 5 kt or less. Partly cloudy. Seas 1 ft or less.
Sunday
High : 69ºF
S wind 5 to 10 kt, with gusts as high as 20 kt. Mostly sunny. Seas 1 ft or less.

NOAA Buoy Data Near Islesboro, ME See Map

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    Wind Speed Forecast for Islesboro, ME

    WednesdayThursdayFriday
    Wind Speed (MPH) 3911915191312141278
    11am3pm7pm11pm3am7am11am3pm7pm11pm3am7am
    MPH 3911915191312141278
    DIR ENESESSESSSWSSWSWWSWWWNWWNWWNW

    Current Weather Conditions In Islesboro, ME

    As Of: 26 minutes ago

    • 51ºF
    • 51ºF
    • 3mph
    • 0º (ENE)
    • 3mph
    • Partly Cloudy
    • 9mi
    • 30.31"
    • 86%
    • 0ºF

    The weather right now in Islesboro, ME is Partly Cloudy. The current temperature is 51°F, and the expected high and low for today, Wednesday, September 9, 2026, are 64° high temperature and 61°F low temperature. The wind is currently blowing at 3 miles per hour, and coming from the East Northeast. The wind is gusting to 3 mph. With the wind and the atmosphere the temperature feels like 51° Fahrenheit. Expected precipitation is 2 percent, with current humidity at 86 percent, and air pressure at 30.31 in. Visibility is 9 nautical miles. There are 1 current weather alert(s).

    Weather Alerts
    Small Craft Advisory - 2:32am Wed Sep 9 2026

    ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 8 PM THIS EVENING TO 8 AM EDT THURSDAY...

    WHAT: South winds 10 to 20 kt with gusts up to 25 kt and seas
    2 to 5 ft expected.

    WHERE: Penobscot Bay and Casco Bay.

    WHEN: From 8 PM this evening to 8 AM EDT Thursday.

    IMPACTS: Conditions will be hazardous to small craft.

    PRECAUTIONARY / PREPAREDNESS ACTIONS:

    Inexperienced mariners, especially those operating smaller
    vessels, should avoid navigating in hazardous conditions.

    &&

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