10-day forecast for Southwest Harbor, ME: 54° to 83°, with precipitation expected on 4 days. The table below breaks each day into morning, afternoon, evening and overnight.
83°
Best day: Sunday, August 9
63° · 0.78 in
Worst day: Monday, August 17
Tap any day below to see morning, afternoon, evening and overnight.
Mon, 1081° / 66°0.02
Morning73°feels 74°
Afternoon79°feels 79°
Evening69°feels 70°
Overnight68°feels 68°
81 °
Southwest Harbor, Monday, 10 August
Light rain. High 81°, low 66°.
Pressure29.94 inHg
Wind9.1 mph SW
Humidity64%
Visibility6.2 mi
Dew point58°
Tue, 1171° / 62°0.07
Morning64°feels 64°
Afternoon69°feels 70°
Evening68°feels 68°
Overnight64°feels 65°
71 °
Southwest Harbor, Tuesday, 11 August
Light rain. High 71°, low 62°.
Pressure29.68 inHg
Wind7.7 mph SW
Humidity79%
Visibility6.2 mi
Dew point62°
Wed, 1270° / 61°0
Morning64°feels 64°
Afternoon68°feels 68°
Evening63°feels 63°
Overnight62°feels 61°
70 °
Southwest Harbor, Wednesday, 12 August
Overcast. High 70°, low 61°.
Pressure29.74 inHg
Wind10.2 mph SW
Humidity61%
Visibility6.2 mi
Dew point55°
Thu, 1369° / 60°0.11
Morning61°feels 62°
Afternoon65°feels 65°
Evening68°feels 67°
Overnight60°feels 60°
69 °
Southwest Harbor, Thursday, 13 August
Light rain. High 69°, low 60°.
Pressure29.68 inHg
Wind8.4 mph S
Humidity83%
Visibility3.2 mi
Dew point60°
Fri, 1466° / 57°0
Morning60°feels 59°
Afternoon65°feels 64°
Evening65°feels 64°
Overnight58°feels 57°
66 °
Southwest Harbor, Friday, 14 August
Clear. High 66°, low 57°.
Pressure29.91 inHg
Wind14.8 mph NW
Humidity58%
Visibility—
Dew point49°
Sat, 1569° / 54°0
Morning57°feels 56°
Afternoon65°feels 64°
Evening64°feels 63°
Overnight59°feels 58°
69 °
Southwest Harbor, Saturday, 15 August
Clear. High 69°, low 54°.
Pressure30.12 inHg
Wind15.4 mph SW
Humidity54%
Visibility—
Dew point47°
Sun, 1664° / 57°0.74
Morning59°feels 58°
Afternoon63°feels 63°
Evening61°feels 61°
Overnight57°feels 56°
64 °
Southwest Harbor, Sunday, 16 August
Heavy rain. High 64°, low 57°.
Pressure30.03 inHg
Wind31.8 mph SE
Humidity78%
Visibility—
Dew point56°
Mon, 1763° / 57°0.78
Morning58°feels 58°
Afternoon58°feels 58°
Evening62°feels 61°
Overnight58°feels 57°
63 °
Southwest Harbor, Monday, 17 August
Heavy rain. High 63°, low 57°.
Pressure29.65 inHg
Wind32.1 mph E
Humidity92%
Visibility—
Dew point55°
Tue, 1868° / 56°0
Morning59°feels 58°
Afternoon67°feels 66°
Evening66°feels 66°
Overnight60°feels 60°
68 °
Southwest Harbor, Tuesday, 18 August
Overcast. High 68°, low 56°.
Pressure30.03 inHg
Wind11.8 mph SW
Humidity71%
Visibility—
Dew point55°
About this forecast
How reliable is a 10-day forecast?
The first 3–5 days are the most reliable, typically within 2–4°. From day six to ten the models show the trend: the direction of change is right more often than the exact numbers.
What does the time-of-day table show?
Temperature in Southwest Harbor, ME around 8am, 2pm, 8pm and 2am each day — handy for planning a walk, a drive or work outdoors.
How is the best day chosen?
We weigh the daytime high against precipitation: a warm, dry day scores highest.