World sea water temperatures

Water temperature in South Portland (ME) in April

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Is it warm enough to swim in South Portland in April? Average water temperature in South Portland in April is 42.1°F and therefore is not suitable for comfortable swimming. The warmest sea in South Portland in April is 49.6°F, and the coldest is 36.7°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in South Portland

Changes water temperature in South Portland in April 2025, 2024

To get an accurate forecast for the water temperature in South Portland for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in South Portland, 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 139.2°F41.4°F36.7°F42.1°F
April 238.8°F41.5°F37°F41.9°F
April 339°F41°F37.2°F42.4°F
April 439.6°F40.6°F37.2°F42.4°F
April 539.7°F40.5°F37.2°F43.5°F
April 640.1°F40.5°F37.6°F43.3°F
April 739.9°F40.3°F37°F43.3°F
April 839.9°F40.8°F37.2°F44.8°F
April 939.7°F41.4°F37.6°F44.4°F
April 1039.6°F41.5°F37.6°F44.2°F
April 1139.7°F41.2°F37.8°F43.7°F
April 1239.6°F41.7°F38.5°F44.1°F
April 1339.6°F43°F38.8°F44.1°F
April 1439.9°F43.3°F39.2°F44.4°F
April 1540.6°F44.1°F39.2°F44.8°F
Day 2025 2024 Min Max
April 1641°F44.6°F39°F46°F
April 1740.6°F44.6°F39°F46.6°F
April 1841°F45.5°F38.8°F46.2°F
April 1941.5°F46°F38.8°F46.6°F
April 2041.7°F45.9°F39°F46.9°F
April 2141.5°F44.2°F40.5°F46.8°F
April 2242.8°F44.1°F41.4°F46.8°F
April 2343.9°F44.8°F41.5°F47.8°F
April 2444.1°F43.9°F41.9°F49.6°F
April 2544.8°F43.2°F41.9°F49.3°F
April 2644.8°F43.2°F41.9°F48°F
April 2743.5°F43.9°F42.6°F48°F
April 2844.2°F45.1°F42.6°F47.3°F
April 2945°F45.9°F42.1°F47.3°F
April 3044.8°F46.2°F41.9°F47.7°F
South Portland water temp chart in April

Average water temperature in South Portland in April over a decade

20162017201820192020
42.3°F41.9°F41.2°F41.2°F42.1°F
20212022202320242025
43.5°F42.8°F43.7°F43.2°F41.4°F

South Portland sea state in April

Chart comparing the height of waves in South Portland 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 South Portland in April

South Portland 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
Portland42.1°F36.7°F49.6°F
Peaks Island42.1°F36.9°F49.6°F
Scarborough42.3°F37°F50°F
Higgins Beach42.3°F37°F50°F
Pine Point42.3°F36.9°F50°F
Cape Elizabeth42.1°F37.2°F49.8°F
Saco42.3°F37°F50°F
Yarmouth42.1°F36.5°F48.9°F
Casco Bay41.9°F36.9°F48.9°F
Biddeford Pool42.3°F37.2°F50°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 South Portland 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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