Southwest Harbor, ME Weather Forecast for 5-Days

Updated: Wed May 20th 2026 6:00 PM EDT

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Southwest Harbor, ME Weather – 5-20 – Scattered Showers
64° / 54°
Scattered Showers
In Southwest Harbor, showers likely at times with highs near 64°F and lows around 54°F. The chance of rain is 86% with an estimated 0.08in. Wind will be moderate, blowing around 20mph on average and gusts of 38.5mph at 7 PM. High humidity with average of 86% is anticipated, the maximum being 66% at 9 PM and 61% being its lowest at 8 PM. Barometric pressure is its highest of 29.93inHg at 11 PM, a lowest point of 29.79inHg at 7 PM with an avg 29.86inHg.
Southwest Harbor, ME Weather – 5-21 – Sunny
55° / 44°

Weather Tomorrow

Sunny
In Southwest Harbor, bright and sunny conditions with highs near 55°F and lows around 44°F. Wind will be moderate, blowing around 20mph on average and gusts of 32.1mph at 12 AM. Humidity levels should be comfortable, sitting around 54% on average, the maximum being 64% at 11 PM and 44% being its lowest at 2 PM. Barometric pressure is its highest of 30.25inHg at 11 PM, a lowest point of 29.96inHg at 12 AM with an avg 30.13inHg.
Southwest Harbor, ME Weather – 5-22 – Sunny
52° / 44°
Sunny
Bright and sunny conditions in Southwest Harbor, with a high of 52°F and a low of 44°F. Winds will be strong at speeds peaking at 21mph and gusts of 36.5mph at 6 PM. The humidity will be on the higher side, averaging about 65%, the maximum being 79% at 10 PM and 49% being its lowest at 10 AM. Barometric pressure is its highest of 30.33inHg at 8 AM, a lowest point of 30.21inHg at 4 PM with an avg 30.27inHg.
Southwest Harbor, ME Weather – 5-23 – Sunny
53° / 45°
Sunny
A sunny day is in the forecast for Southwest Harbor, with a high of 53°F and a low of 45°F. Wind will be moderate, blowing around 11mph on average and gusts of 19.7mph at 1 AM. The humidity will be on the higher side, averaging about 66%, the maximum being 86% at 5 AM and 51% being its lowest at 12 PM. Barometric pressure is its highest of 30.49inHg at 11 PM, a lowest point of 30.27inHg at 2 AM with an avg 30.39inHg.
Southwest Harbor, ME Weather – 5-24 – Sunny
54° / 45°
Sunny
Southwest Harbor is set for sunshine with temperatures peaking at 54°F and dipping to 45°F. Wind will be moderate, blowing around 12mph on average and gusts of 21.9mph at 5 PM. The humidity will be on the higher side, averaging about 67%, the maximum being 73% at 2 AM and 57% being its lowest at 11 AM. Barometric pressure is its highest of 30.56inHg at 8 AM, a lowest point of 30.49inHg at 2 AM with an avg 30.53inHg.
Southwest Harbor, ME Weather – 5-25 – Partly Cloudy
50° / 47°
Partly Cloudy
Highs will reach 50°F with lows near 47°F in Southwest Harbor, where overcast conditions are. Wind will be moderate, blowing around 12mph on average and gusts of 21.6mph at 11 PM. The humidity will be on the higher side, averaging about 75%, the maximum being 88% at 11 PM and 67% being its lowest at 2 PM. Barometric pressure is its highest of 30.55inHg at 8 AM, a lowest point of 30.41inHg at 11 PM with an avg 30.5inHg.

Currently

Sunny 63°F
29.77 inHg.
Barometer
70%
Humidity
WNW 31 mph
Wind
Sunny

5 Day Forecast Nearby

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