Sea Temperature in Portland in April

Complete information on the sea temperature range in the Atlantic Ocean in Portland in April. Historical daily data. Climate details for April. 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.

Water Temperature Range in Portland in April

36°F

MINIMUN

41°F

AVERAGE

46°F

MAXIMUM

Historical Data of Water Temperature in April in Portland

Water Temperature Chart for Atlantic Ocean in Portland in April

Sea Temperature Table in Portland in April Over the Past Years

Day	2024	2023	2022	Average
Apr 1	43°C	37°C	37°C	39°C
Apr 2	39°C	37°C	37°C	38°C
Apr 3	43°C	39°C	41°C	41°C
Apr 4	43°C	37°C	43°C	41°C
Apr 5	43°C	36°C	43°C	41°C
Apr 6	43°C	43°C	39°C	42°C
Apr 7	43°C	43°C	36°C	40°C
Apr 8	45°C	39°C	41°C	41°C
Apr 9	45°C	43°C	43°C	42°C
Apr 10	45°C	39°C	43°C	42°C
Apr 11	45°C	39°C	37°C	41°C
Apr 12	45°C	41°C	39°C	42°C
Apr 13	45°C	37°C	36°C	40°C
Apr 14	45°C	39°C	39°C	42°C
Apr 15	45°C	37°C	39°C	41°C
Apr 16	43°C	36°C	39°C	41°C
Apr 17	43°C	37°C	39°C	41°C
Apr 18	45°C	37°C	43°C	42°C
Apr 19	45°C	39°C	43°C	42°C
Apr 20	45°C	39°C	39°C	42°C
Apr 21	45°C	37°C	43°C	42°C
Apr 22	45°C	41°C	39°C	42°C
Apr 23	43°C	36°C	41°C	41°C
Apr 24	45°C	37°C	37°C	41°C
Apr 25	43°C	37°C	39°C	41°C
Apr 26	45°C	36°C	41°C	41°C
Apr 27	45°C	39°C	43°C	42°C
Apr 28	45°C	43°C	37°C	42°C
Apr 29	45°C	36°C	43°C	42°C

Portland Climate and Swimming Opportunities in April

54°F

Average Day Air Temperature

39°F

Average Night Air Temperature

2 in

Precipitation Amount per Month

13 days

Number of Rainy Days

14 hrs

Daylight
per Day

5 hrs

Sunshine
per Day

12 mph

Average Wind Speed

84%

Average
humidity

Portland lies within the Maine in United States. The average daytime temperature in Portland in April is 53°F (12°C), while the nighttime average is 40°F (4°C). There are typically 13 rainy days during the month, with a total precipitation of 2.4 inches (62 mm). The daylight duration in April in Portland is 14 hours, with an average of 5 hours of sunshine per day. The average wind speed in April is 12 mph (19 km/h), and the humidity level is around 84%.

The water temperature in Portland in April ranges from 37°F to 41°F (3°C to 5°C). At the beginning of the month, the average temperature is around 41°F (5°C), shifting to 41°F (5°C) by mid-April and reaching 41°F (5°C) in the last ten days. Overall, the average sea temperature in Portland for April is 41°F (5°C). The water remains dangerously cold, but the slightly warmer air can make short swims somewhat more bearable. Still, only for the well-prepared.

Sea Temperature in April in Nearby Cities

Frequently Asked Questions About Water Temperatures in April in Portland

What is the sea temperature in Portland in April?

The water temperature in the Atlantic Ocean in Portland in April ranges from 37°F to 41°F (3°C to 5°C).

Is it possible to swim in the Atlantic Ocean in Portland in April?

The average sea temperature in Portland in April is 41°F (5°C), and the air temperature is 53°F (12°C), so the water remains dangerously cold, but the slightly warmer air can make short swims somewhat more bearable. Still, only for the well-prepared.