Sea Temperature in Portland in August

© Benjamin Moore

Complete information on the sea temperature range in the Atlantic Ocean in Portland in August. Historical daily data. Climate details for August. Tips on swimming conditions and beach relaxation in Portland. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.

Portland Climate and Swimming Opportunities in August

Portland lies within the Maine in United States. The average daytime temperature in Portland in August is 65°F (18°C), while the nighttime average is 52°F (11°C). There are typically 16 rainy days during the month, with a total precipitation of 3.4 inches (85 mm). The daylight duration in August in Portland is 15 hours, with an average of 5 hours of sunshine per day. The average wind speed in August is 10 mph (16 km/h), and the humidity level is around 86%.

The water temperature in Portland in August ranges from 59°F to 63°F (15°C to 17°C). At the beginning of the month, the average temperature is around 61°F (16°C), shifting to 63°F (17°C) by mid-August and reaching 61°F (16°C) in the last ten days. Overall, the average sea temperature in Portland for August is 61°F (16°C). Ideal conditions for a refreshing swim, though some may still find it a bit cool.

Frequently Asked Questions About Water Temperatures in August in Portland