World sea water temperatures

Water temperature in Sullivan (ME) in April

Is it warm enough to swim in Sullivan in April? Average water temperature in Sullivan in April is 40.1°F and therefore is not suitable for comfortable swimming. The warmest sea in Sullivan in April is 44.8°F, and the coldest is 35.1°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Sullivan

Changes water temperature in Sullivan in April 2025, 2024

To get an accurate forecast for the water temperature in Sullivan for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Sullivan, the selected years in the table also show the values of the maximum and minimum temperatures on each of the days of April.

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024 Min Max
April 137.4°F39.2°F35.6°F39.9°F
April 236.1°F39.2°F35.8°F40.3°F
April 336.1°F40.1°F36.1°F40.1°F
April 437.9°F39.9°F35.4°F39.9°F
April 537.2°F39.9°F35.2°F40.1°F
April 637.2°F39.7°F35.6°F41°F
April 737.4°F38.3°F35.1°F40.8°F
April 837.6°F39.4°F35.4°F41.5°F
April 937.8°F39.7°F35.4°F41.4°F
April 1037.8°F39.7°F35.6°F40.8°F
April 1137°F39.7°F35.8°F42.1°F
April 1237.4°F39.7°F36.3°F43°F
April 1337.6°F40.8°F36.9°F42.6°F
April 1438.5°F43°F37.6°F43.5°F
April 1538.8°F41.7°F37°F43.3°F
Day 2025 2024 Min Max
April 1638.7°F43.5°F37.4°F43.9°F
April 1739.4°F42.8°F37.6°F43.7°F
April 1839.9°F43°F37.8°F43.3°F
April 1938.5°F43.3°F37.9°F43.5°F
April 2040.5°F42.8°F37.8°F44.1°F
April 2140.1°F44.6°F38.1°F44.6°F
April 2240.3°F43.3°F38.5°F43.5°F
April 2341.7°F43.7°F38.8°F43.7°F
April 2441.4°F43.3°F39.2°F44.4°F
April 2541.4°F42.8°F39.7°F44.2°F
April 2641°F42.6°F39.6°F43.7°F
April 2740.8°F42.4°F39.7°F44.2°F
April 2841.5°F42.4°F39.4°F44.8°F
April 2942.6°F44.6°F39.7°F44.6°F
April 3043.9°F44.2°F39.6°F44.2°F
Sullivan water temp chart in April

Average water temperature in Sullivan in April over a decade

20162017201820192020
40.6°F39.6°F39.2°F38.8°F40.5°F
20212022202320242025
42.1°F41.2°F41.7°F41.7°F39°F

Sullivan sea state in April

Chart comparing the height of waves in Sullivan in April over the past years. The red line indicates the height of the waves when swimming in the sea is prohibited. To view the current sea conditions, click on the graph.

Waves height in Sullivan in April

Sullivan water temperature during other months:

You can also view information about water temperature for other months by clicking on the month button below

Where is the warm sea water in April?

Want to know where the water temperature in April is good for swimming? Select the continent of interest, the day of the month and the required water temperature

Region
Date (day and month)
Water temperature: min 60°F
 Average temperature  Maximum temperature

Temperature in neighboring cities

The nearest locations with the average water temperature in April. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

AvrMinMax
Trenton40.1°F35.1°F44.8°F
Lamoine40.1°F35.2°F44.8°F
Winter Harbor40.1°F35.8°F45.1°F
Sand Beach40.1°F35.8°F45.1°F
Acadia40.1°F36°F45.1°F
Seal Harbor Beach40.1°F36°F45.1°F
Ellsworth40.1°F35.1°F45°F
Surry40.1°F34.7°F45.9°F
Tremont40.1°F35.4°F45°F
Islesford40.3°F36.1°F45.1°F

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[1] - The "Blue Flag" is awarded to beaches which fulfill a number of criteria, including: the quality of the bathing water, which must be in accordance with the relevant European Union Directive environmental education and information and beach area management and safety.

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Our report for Sullivan is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.

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