Portland Maine and Casco Bay Weather
Overnight
45°F
Cloudy
10 mph N
Thursday
60°F
Mostly Cloudy
10 to 15 mph N
Thursday Night
40°F
Mostly Clear
15 mph N
Friday
52°F
Sunny
10 to 15 mph N
Friday Night
35°F
Clear
5 mph N
Saturday
54°F
Sunny
5 mph W
Saturday Night
37°F
Clear
0 to 5 mph W
Sunday
57°F
Sunny
0 to 5 mph SW
Sunday Night
41°F
Mostly Clear
0 to 5 mph SW
Monday
60°F
Sunny
0 to 5 mph W
Monday Night
44°F
Partly Cloudy
0 to 5 mph NW
Tuesday
53°F
Mostly Sunny
5 to 10 mph N
Tuesday Night
39°F
Mostly Clear
5 mph N
Wednesday
49°F
Mostly Sunny
5 mph SW
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.