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Weather forecast in Southwest Harbor

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This data display current weather and forecast for the coming days in Southwest Harbor. In addition to temperature, wind, humidity and pressure, we include data on the probability of precipitation so you can have all the information about your destination before your trip.

Southwest Harbor current temperature and weather

September 6, 2025
Night
Overcast
61.5°F
Feels like:
61.5°F
Overcast
Wind: 8.7 mph (14 Km/h) S S
Pressure: 29.95 inHg (1014 hPa)
Humidity: 98%
Precip. prob.: 0%
Visibility: 6 mi (10 km)

UV index: 0
Morning
Overcast
62.1°F
Feels like:
62.1°F
Overcast
Wind: 11.6 mph (18.7 Km/h) S S
Pressure: 30.01 inHg (1016 hPa)
Humidity: 98%
Precip. prob.: 0%
Visibility: 6 mi (10 km)

UV index: 1.6
Day
Overcast
62.4°F
Feels like:
62.4°F
Overcast
Wind: 12.8 mph (20.5 Km/h) S S
Pressure: 29.99 inHg (1016 hPa)
Humidity: 97%
Precip. prob.: 0%
Visibility: 6 mi (10 km)

UV index: 3.8
Evening
Overcast
62.8°F
Feels like:
62.8°F
Overcast
Wind: 6.9 mph (11.2 Km/h) W W
Pressure: 29.94 inHg (1014 hPa)
Humidity: 98%
Precip. prob.: 0%
Visibility: 6 mi (10 km)

UV index: 0


Marine weather forecast Southwest Harbor

The graphs show wave heights and directions, as well as wind speed and direction in Southwest Harbor for the coming days. Click on the sea state chart for more details




You may also be interested in other sections of our site for Southwest Harbor: Sea temperature, Sunrise and Sunset

Where is the warmest sea water in the world?

If you want to plan a vacation on the beach and enjoy the warm sea, choose the day of the year, region and the minimum comfortable sea/ocean temperature that interests you. As a result, you will get a list of countries and cities in which the average sea temperature or maximum temperature on this day over the past 10 years exceeds your chosen value

Region
Date (day and month)
Water temperature: min 60°F
 Average temperature  Maximum temperature

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Our report for Southwest Harbor is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.

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