Maine weather in August

The state broadly agrees with itself in August: afternoons run 79° in Portland, Maine and 78° in Bar Harbor, with everywhere else in between.

Based on 2 weather stations. Two stations, both on the coast — the North Woods interior gets a longer, colder winter than either of these.

Southern Coast

Highs near 79°, nights around 60°, and 3.6 in of rain in a typical August.

Place	Highs / lows	Wet days	The short version
Portland, Maine	79° / 60°	5	Driest weeks of the year, and swimmable water at last.

Highs near 78°, nights around 60°, and 3.5 in of rain in a typical August.

Place	Highs / lows	Wet days	The short version
Bar Harbor	78° / 60°	6	As warm as the Gulf of Maine is willing to get.

Each place above has its own page for the full story — what the month feels like, what to pack, and whether the timing is right.