Castine Sea Temperature in April

Looking to find out what the average sea water temperature in Castine is for April? Find out what the lowest, highest, and average water temperatures are for Castine over the past 10 years.

Average water temperature in Castine for April

The average, high, and low temperatures below should help you if you can swim in the water in Castine in April.

4.94° C

(40.9° F)

  • highest: 7.83° C (46.09° F)
  • lowest: 1.41° C (34.54° F)

Water at this temperature is freezing cold, can cause pain and takes your breath away. Unless you are very experienced and are under strict supervision, swimming in this water for more than a few minutes can be very dangerous. Be careful, stay safe, and enjoy the rush of endorphins and exhileration from a brief cold water swim.

Water temperature range by day in April in Castine

The chart below shows the range of low and high temperatures by day for the month of April in Castine.

Water temperatures for April in Castine in recent years

Day 2024 2023 2022 2021
1 4.08° C 4.45° C 3.67° C 4.43° C
2 4.35° C 4.72° C 3.61° C 4.48° C
3 4.51° C 4.64° C 3.61° C 4.65° C
4 4.51° C 4.69° C 3.92° C 4.68° C
5 4.08° C 4.67° C 4.08° C 4.65° C
6 4.19° C 4.87° C 4.22° C 4.69° C
7 4.6° C 5.11° C 4.6° C 4.83° C
8 4.93° C 5.02° C 4.58° C 5.29° C
9 5.01° C 5.11° C 4.59° C 5.26° C
10 5.1° C 5.44° C 4.68° C 5.37° C
11 5.13° C 5.63° C 4.96° C 5.21° C
12 5.61° C 5.88° C 4.94° C 5.11° C
13 5.67° C 6.17° C 5.61° C 5.32° C
14 6.13° C 6.28° C 5.73° C 5.51° C
15 6.87° C 6.27° C 6.06° C 5.54° C
16 7.14° C 6.61° C 5.86° C 5.37° C
17 7.1° C 7.83° C 5.55° C 5.21° C
18 7.13° C 7.47° C 5.43° C 5.38° C
19 7.31° C 7.14° C 5.1° C 5.59° C
20 7.15° C 6.85° C 5.28° C 5.76° C
21 6.91° C 6.72° C 5.15° C 5.74° C
22 6.78° C 6.61° C 5.55° C 5.56° C
23 6.85° C 6.56° C 5.1° C 5.53° C
24 7.04° C 6.65° C 5.92° C 5.55° C
25 6.46° C 6.92° C 5.91° C 5.66° C
26 6.21° C 6.97° C 6.07° C 5.76° C
27 7° C 7.14° C 6.11° C 5.96° C
28 6.58° C 7.66° C 5.85° C 6.13° C
29 7.32° C 7.74° C 5.61° C 6.2° C
30 7.63° C 7.6° C 5.68° C 6.16° C

Water temperature in April for locations near Castine

Belfast

United States, North America

10.56 miles away

Sedgwick

United States, North America

10.79 miles away

Lincolnville

United States, North America

12.76 miles away

Deer Isle

United States, North America

12.84 miles away

Orland

United States, North America

12.92 miles away

Surry

United States, North America

16.42 miles away

Data source and citation

Raw data for the calculations made to find the sea surface temperature in Castine comes from the National Oceanic and Atmospheric Administration (NOAA) and their 1/4° daily Optimum Interpolation Sea Surface Temperature.

The water temperature data is constructed by combining observations from different platforms (satellites, ships, buoys, and Argo floats) on a regular global grid. A spatially complete sea surface temperature map is then built by interpolating to fill in gaps in the data.

If you'd like to use any of the information above in the format it is presented, please use the citation tool below.

  • "Castine Sea Temperature in April". SeaTemperatures.net. Accessed on May 8, 2024. http://seatemperatures.net/north-america/united-states/castine-april-temperature/.

  • "Castine Sea Temperature in April". SeaTemperatures.net, http://seatemperatures.net/north-america/united-states/castine-april-temperature/. Accessed 8 May, 2024

  • Castine Sea Temperature in April. SeaTemperatures.net. Retrieved from http://seatemperatures.net/north-america/united-states/castine-april-temperature/.