What is today's weather forecast for Southwest Harbor, ME?

Today's forecast for Southwest Harbor shows a low of 28 degrees Fahrenheit. Mostly clear, with a low around 28.

What is the 7-day weather forecast for Southwest Harbor, ME?

The 7-day forecast for Southwest Harbor shows highs from 27 to 53 degrees and lows from 15 to 38 degrees Fahrenheit. Expect precipitation on 6 days with chances of 20% or higher.

Will it rain in Southwest Harbor, ME this week?

Yes, rain is possible in Southwest Harbor this week. Precipitation chances: Thursday (40% chance), Friday (100% chance), Saturday (50% chance), Sunday (50% chance), Tuesday (50% chance), Wednesday (20% chance).

How accurate is the Southwest Harbor weather forecast?

WeatherForYou provides highly accurate Southwest Harbor forecasts using National Weather Service data and current conditions from the nearest available weather stations, often miles closer than regional airports, for the most precise local forecasts.

Southwest Harbor, ME Weather Forecast and Current Conditions

WEATHER ALERTS - High Wind Watch

Current Conditions From Nearby Local Station

Switch to Metric Units

40°F
Feels Like 38°F

Humidity 78% Dew Point 33°F Wind WNW 3 MPH Gusts 4 Barometer 29.95 in.

Report from a personal weather station 0.7 mi. ESE of central Southwest Harbor
at 12:08 AM Thu, Dec 18, 2025

Point Forecast at a Glance

WedDec 17

ThuDec 18

FriDec 19

100%

SatDec 20

SunDec 21

50%

MonDec 22

TueDec 23

40%

Jump to detailed forecast ↓

7-Day Temperature Trend

Week Ahead Summary

High temperatures start near 46°F, reaching 53°F before cooling to 27°F, then recovering to 36°F by week's end. Unsettled weather expected with wintry mix likely on at least 5 days.

Climate Context

This week's forecast shows temperatures running 2°F above the historical average for December. Normal highs for this period are around 37°F with lows around 21°F.

This Date in Weather History

1884 - A three week blockade of snow began at Portland, OR. A record December total of 34 inches was received.

Southwest Harbor, ME 7 Day Weather Forecast Details

Wednesday Dec 17

Night: Mostly clear, with a low around 28. Northwest wind 6 to 10 mph.

Thursday Dec 18

Day: Mostly sunny, with a high near 46. Light and variable wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

Night: A chance of rain, mainly after 2am. Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 38. South wind 10 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.

Friday Dec 19

Day: Rain. Areas of fog. High near 53. Windy, with a south wind 15 to 20 mph increasing to 24 to 29 mph in the afternoon. Winds could gust as high as 55 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

Night: A chance of rain, mainly before 8pm. Areas of fog before 9pm. Otherwise, mostly cloudy, with a low around 24. West wind 13 to 18 mph, with gusts as high as 33 mph. Chance of precipitation is 30%.

Saturday Dec 20

Day: Mostly sunny, with a high near 38. Northwest wind 7 to 17 mph, with gusts as high as 33 mph.

Night: A slight chance of snow before midnight, then a chance of rain and snow between midnight and 3am, then a chance of rain after 3am. Mostly cloudy, with a low around 26. Southwest wind 5 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 50%.

Sunday Dec 21

Day: A chance of rain, mainly before 1pm. Mostly cloudy, with a high near 43. Chance of precipitation is 50%.

Night: A slight chance of rain showers before 8pm, then a slight chance of snow showers between 8pm and 10pm. Partly cloudy, with a low around 19. Chance of precipitation is 20%.

Monday Dec 22

Day: Mostly sunny, with a high near 27.

Night: Partly cloudy, with a low around 15.

Tuesday Dec 23

Day: A chance of rain and snow. Partly sunny, with a high near 36. Chance of precipitation is 40%.

Night: A chance of rain and snow. Mostly cloudy, with a low around 21. Chance of precipitation is 50%.

Wednesday Dec 24

Day: A slight chance of snow. Partly sunny, with a high near 33. Chance of precipitation is 20%.

About Southwest Harbor, ME

Southwest Harbor is a town in Hancock County, Maine, United States. Located on Mount Desert Island, the population was 1,756 at the 2020 census. The municipality contains within it the villages of Southwest Harbor, Manset, Seawall, Wonderland, and Pemetic Hills.

Content from Wikipedia, licensed under CC BY-SA 3.0.

How We Provide Better Local Weather

Current conditions: We use the nearest available station to your location - including professional MESONET/MADIS and local weather stations - often miles closer than regional airports.

Forecasts: National Weather Service point forecasts predict for your specific area, not broad regional zones, making them far more relevant to your location.

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