Average water temperature in Portland

The mean water temperature over the year in Portland (Maine), the United States of America.

On average, August has the warmest water temperature with 18°C.
On average, March has the coldest water temperature with 3°C.

Weather Forecasts for Portland (ME)

Fri May 03

13°C | 7°C

14 km/h

broken clouds and no rain

hourly forecast

Sat May 04

11°C | 6°C

14 km/h

almost clear and no rain

hourly forecast

Sun May 05

12°C | 5°C

18 km/h

7.7 mm

overcast and slight rain

hourly forecast

5-Day Forecast 10-Day Forecast

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in Portland.

Our site offers climate and forecast data for every country in the world. Are you going to the United States of America? On this website you can find historical weather averages for many cities in the United States of America. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.

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