Sea Temperature in Castine in April

Complete information on the sea temperature range in the Atlantic Ocean in Castine in April. Historical daily data. Climate details for April. Tips on swimming conditions and beach relaxation in Castine. 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 Castine in April

36°F

MINIMUN

40°F

AVERAGE

45°F

MAXIMUM

Historical Data of Water Temperature in April in Castine

Water Temperature Chart for Atlantic Ocean in Castine in April

Sea Temperature Table in Castine in April Over the Past Years

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

Castine 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

Castine lies within the Maine in United States. The average daytime temperature in Castine 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 Castine 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 Castine in April ranges from 37°F to 43°F (3°C to 6°C). At the beginning of the month, the average temperature is around 39°F (4°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 Castine 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 Castine

What is the sea temperature in Castine in April?

The water temperature in the Atlantic Ocean in Castine in April ranges from 37°F to 43°F (3°C to 6°C).

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

The average sea temperature in Castine 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.