South Harpswell, ME Weather Forecast and Current Conditions

Day Sky High / Low Precip Wind Humidity
Sun
Aug 2 		Rain -º / 66º 86% SSE 9 mph 97%
Mon
Aug 3 		Rain/Wind
View Hourly 		73º / 62º 93% S 21 mph 90%
1am Light Rain 67º 69% SSE 9 mph 97%
2am Foggy 67º 17% SSE 8 mph 97%
3am Foggy 66º 21% SSE 8 mph 98%
4am Foggy 66º 24% SSE 8 mph 95%
5am Showers 67º 67% SSE 8 mph 93%
6am Rain 68º 86% SSE 9 mph 92%
7am Rain 68º 92% SSE 10 mph 94%
8am Rain 70º 72% SSE 13 mph 92%
9am Rain 70º 76% S 15 mph 91%
10am Rain 71º 66% S 15 mph 91%
11am Rain 71º 73% S 18 mph 90%
12pm Rain 71º 78% S 18 mph 90%
1pm Rain 72º 66% S 19 mph 89%
2pm Rain/Wind 72º 72% S 20 mph 89%
3pm Rain 73º 74% S 19 mph 87%
4pm Light Rain/Wind 72º 64% S 20 mph 88%
5pm Showers/Wind 72º 56% SSW 20 mph 88%
6pm Showers/Wind 72º 52% SSW 20 mph 86%
7pm Cloudy 72º 24% SSW 18 mph 83%
8pm Few Showers 72º 34% SSW 18 mph 84%
9pm Few Showers 71º 31% SSW 16 mph 89%
10pm Partly Cloudy 70º 24% SW 15 mph 87%
11pm Mostly Cloudy 70º 7% WSW 13 mph 84%
Tue
Aug 4 		Sunny
View Hourly 		79º / 60º 4% WSW 11 mph 58%
12am Partly Cloudy 68º 7% WSW 11 mph 84%
1am Clear 67º 6% WSW 11 mph 81%
2am Clear 66º 6% W 10 mph 79%
3am Clear 65º 5% W 8 mph 80%
4am Clear 64º 5% W 9 mph 81%
5am Clear 63º 5% W 8 mph 82%
6am Sunny 63º 5% W 8 mph 82%
7am Sunny 66º 5% W 8 mph 77%
8am Sunny 69º 4% W 10 mph 73%
9am Sunny 72º 3% W 9 mph 68%
10am Sunny 74º 1% W 9 mph 62%
11am Sunny 76º 1% W 10 mph 55%
12pm Sunny 77º 1% W 10 mph 51%
1pm Sunny 78º 0% WSW 10 mph 49%
2pm Sunny 78º 1% SW 10 mph 48%
3pm Sunny 77º 1% SW 10 mph 51%
4pm Sunny 77º 2% SW 10 mph 52%
5pm Sunny 76º 2% SW 10 mph 52%
6pm Sunny 76º 3% SW 10 mph 54%
7pm Sunny 74º 3% SW 8 mph 60%
8pm Clear 72º 3% SW 7 mph 62%
9pm Clear 70º 4% WSW 6 mph 68%
10pm Clear 68º 4% WSW 5 mph 74%
11pm Clear 67º 5% WSW 4 mph 78%
Wed
Aug 5 		Partly Cloudy
View Hourly 		76º / 64º 18% SSW 11 mph 70%
12am Clear 66º 6% WSW 2 mph 80%
Thu
Aug 6 		Partly Cloudy 78º / 65º 13% SSW 10 mph 73%
Fri
Aug 7 		PM Thunderstorms 79º / 65º 40% SSW 10 mph 73%
Sat
Aug 8 		Partly Cloudy 79º / 65º 24% SW 10 mph 70%
Sun
Aug 9 		Partly Cloudy 78º / 66º 16% SSW 12 mph 68%

Weather Radar for South Harpswell, ME See Radar

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* Playback displays weather for the past 6 hours.

NOAA Weather Marine Forecast for South Harpswell, ME

Tonight
Low : 64ºF
SSE wind 5 to 10 kt, with gusts as high as 20 kt. A slight chance of showers, then showers and possibly a thunderstorm after 2am. Areas of fog. Seas 1 ft or less.
Monday
High : 71ºF
S wind 10 to 15 kt increasing to 15 to 20 kt in the afternoon. Winds could gust as high as 35 kt. Showers and possibly a thunderstorm, mainly before 2pm, then a chance of showers and thunderstorms after 2pm. Areas of fog before noon, then Patchy fog between 1pm and 3pm. Seas 1 ft or less.
Monday Night
Low : 63ºF
SSW wind 15 to 20 kt becoming WSW 10 to 15 kt after midnight. Winds could gust as high as 30 kt. Showers likely, mainly before 8pm. Seas 1 ft or less.
Tuesday
High : 75ºF
WSW wind around 10 kt. Sunny. Seas 1 ft or less.
Tuesday Night
Low : 62ºF
Variable winds 5 kt or less. Mostly clear. Seas 1 ft or less.
Wednesday
High : 72ºF
Variable winds less than 5 kt becoming S 5 to 10 kt in the afternoon. Mostly sunny. Seas 1 ft or less.
Wednesday Night
Low : 63ºF
Variable winds 5 kt or less. Partly cloudy. Seas 1 ft or less.
Thursday
High : 77ºF
Variable winds less than 5 kt becoming S 5 to 10 kt in the afternoon. Mostly sunny. Seas 1 ft or less.
Thursday Night
Low : 66ºF
Variable winds 5 kt or less. Partly cloudy. Seas 1 ft or less.

NOAA Buoy Data Near South Harpswell, ME See Map

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    Wind Speed Forecast for South Harpswell, ME

    MondayTuesdayWednesday
    Wind Speed (MPH) 9815192016118910106
    5am9am1pm5pm9pm1am5am9am1pm5pm9pm1am
    MPH 9815192016118910106
    DIR SSESSESSSSWSSWWSWWWWSWSWWSW

    Current Weather Conditions In South Harpswell, ME

    As Of: 33 minutes ago

    • 67ºF
    • 67ºF
    • 9mph
    • 0º (SSE)
    • 9mph
    • Light Rain
    • 2mi
    • 29.89"
    • 97%
    • 0ºF

    The weather right now in South Harpswell, ME is Light Rain. The current temperature is 67°F, and the expected high and low for today, Monday, August 3, 2026, are -° high temperature and 66°F low temperature. The wind is currently blowing at 9 miles per hour, and coming from the South Southeast. The wind is gusting to 9 mph. With the wind and the atmosphere the temperature feels like 67° Fahrenheit. Expected precipitation is 69 percent, with current humidity at 97 percent, and air pressure at 29.89 in. Visibility is 2.7 nautical miles. There are 1 current weather alert(s).

    Weather Alerts
    Small Craft Advisory - 2:21pm Sun Aug 2 2026

    ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM MONDAY TO 8 AM EDT TUESDAY...

    WHAT: Southwest winds 15 to 25 kt with gusts up to 30 kt and
    seas 2 to 5 ft expected.

    WHERE: Penobscot Bay and Casco Bay.

    WHEN: From 2 PM Monday to 8 AM EDT Tuesday.

    IMPACTS: Conditions will be hazardous to small craft.

    PRECAUTIONARY / PREPAREDNESS ACTIONS:

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

    &&