Portland Maine and Casco Bay Weather
Overnight
35°F
Clear
5 mph W
Sunday
54°F
Sunny
5 to 10 mph SW
Sunday Night
45°F
Mostly Clear
10 mph SW
Monday
64°F
Mostly Sunny
10 mph SW
Monday Night
49°F
Mostly Cloudy
0 to 5 mph W
Tuesday
59°F
Partly Sunny
0 to 5 mph S
Tuesday Night
49°F
Mostly Cloudy
5 mph S
Wednesday
62°F
Partly Sunny
5 to 10 mph S
Wednesday Night
52°F
Mostly Cloudy
5 to 10 mph SW
Thursday
63°F
Partly Sunny then Slight Chance Light Rain
5 to 10 mph S
Thursday Night
53°F
Chance Light Rain
10 mph S
Friday
61°F
Light Rain Likely
5 to 10 mph SE
Friday Night
48°F
Light Rain Likely
10 to 15 mph E
Saturday
56°F
Light Rain Likely
10 to 15 mph NE
Marine weather for Portland, Casco Bay, Portland Harbor, South Portland, Cape Elizabeth, Portland Head Light, Falmouth, Falmouth Foreside, Cousins Island, Yarmouth, the Royal River, Freeport, South Freeport, the Harraseeket River, the New Meadows River, Harpswell, Orr's Island, Bailey Island, Peaks Island, Long Island, Great Diamond Island, Chebeague Island, Cliff Island, the Calendar Islands, Hussey Sound, Broad Sound, and the Fore River, Maine. Wind, tides, and conditions for sailing, boating, fishing, sea kayaking, paddleboarding, and windsurfing.