Live Weather & Forecast
Weather in Southwest Harbor
Maine, United States · Real-time conditions & 3-day outlook
6°C
Feels like 2°C
43°F / Feels 35°F
Clear
Southwest Harbor, Maine
🌙 Nighttime
Updated: 2026-04-12 20:00
Humidity
51%
Wind
27.7 km/h NW
Wind Gust
42.2 km/h
Pressure
1029 mb
Visibility
16 km
UV Index
0
(Low)
Precipitation
0 mm
Cloud Cover
0%
Dew Point
-5.3°C
Wind Degree
305°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
164.9 μg/m³
NO₂
1.9 μg/m³
O₃
90 μg/m³
SO₂
1.9 μg/m³
PM 2.5
6.8 μg/m³
PM 10
8.4 μg/m³
Today's Hourly Forecast
24-hour breakdown for Southwest Harbor, Maine
12 AM
3°
Clear
1 AM
6°
Clear
2 AM
2°
Clear
3 AM
2°
Clear
4 AM
1°
Clear
5 AM
1°
Clear
6 AM
2°
Sunny
7 AM
3°
Sunny
8 AM
4°
Sunny
9 AM
6°
Sunny
10 AM
8°
Sunny
11 AM
9°
Sunny
12 PM
11°
Sunny
1 PM
12°
Sunny
2 PM
12°
Sunny
3 PM
11°
Sunny
4 PM
10°
Sunny
5 PM
10°
Sunny
6 PM
9°
Sunny
7 PM
7°
Sunny
8 PM
6°
Clear
9 PM
5°
Clear
10 PM
5°
Clear
11 PM
4°
Clear
3-Day Forecast
Daily overview for Southwest Harbor, Maine
Today
Sunny
13°
/
1°
🌧️ 0% chance of rain
💧 Avg. humidity: 47%
💨 Max wind: 28.8 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.3
🌅 Sunrise: 05:55 AM
🌇 Sunset: 07:14 PM
🌙 Waning Crescent
🌑 Moon: 33% lit
Mon, Apr 13
Moderate rain
6°
/
3°
🌧️ 83% chance of rain
💧 Avg. humidity: 92%
💨 Max wind: 43.9 km/h
🌧️ Total precip: 15.98 mm
☀️ UV Index: 0.8
🌅 Sunrise: 05:53 AM
🌇 Sunset: 07:16 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Fog
8°
/
5°
🌧️ 0% chance of rain
💧 Avg. humidity: 97%
💨 Max wind: 24.5 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.5
🌅 Sunrise: 05:52 AM
🌇 Sunset: 07:17 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Best Time to Visit Southwest Harbor
Plan your trip to Southwest Harbor, United States around the most favorable weather conditions.
Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
Frequently Asked Questions
What is the current weather in Southwest Harbor?
Current conditions in Southwest Harbor: Clear, temperature 6°C, humidity 51%.
What is the best time to visit Southwest Harbor?
The best time to visit Southwest Harbor is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Southwest Harbor?
Southwest Harbor is located at approximately 44.3° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Southwest Harbor?
The wettest period in Southwest Harbor is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Southwest Harbor?
For visits to Southwest Harbor during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Southwest Harbor in?
Southwest Harbor is located in United States, in the state of Maine.
What are the public holidays in Southwest Harbor in 2026?
View the 2026 public holidays for Southwest Harbor on our Holidays page.
What are the GPS coordinates used for the weather forecast in Southwest Harbor?
The weather forecast for Southwest Harbor uses coordinates 44.2798, -68.3259.