World sea water temperatures

Water temperature in South Portland (ME) in March

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Is it warm enough to swim in South Portland in March? Average water temperature in South Portland in March is 38.7°F and therefore is not suitable for comfortable swimming. The warmest sea in South Portland in March is 45.5°F, and the coldest is 34.7°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 March 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 March.

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024 Min Max
March 137.4°F39.6°F34.7°F40.6°F
March 236.3°F39.2°F35.1°F40.6°F
March 336.7°F39.9°F35.2°F40.8°F
March 437°F38.7°F35.6°F40.6°F
March 537°F39.7°F35.4°F40.1°F
March 637.8°F40.1°F35.4°F40.1°F
March 737°F40.3°F35.2°F40.3°F
March 837.6°F40.5°F35.2°F40.6°F
March 938.1°F40.1°F35.2°F41.2°F
March 1038.5°F40.3°F35.4°F40.5°F
March 1138.8°F40.1°F36°F40.8°F
March 1238.5°F40.1°F36°F41°F
March 1338.5°F40.1°F36°F41.7°F
March 1438.5°F40.6°F36.1°F41.9°F
March 1538.3°F40.6°F36.3°F41.2°F
Day 2025 2024 Min Max
March 1639°F40.6°F36.1°F41°F
March 1739.2°F40.6°F35.8°F41°F
March 1839.2°F41°F36°F42.3°F
March 1938.8°F40.8°F36°F42.4°F
March 2039.9°F40.8°F36.3°F42.8°F
March 2139.9°F40.5°F36°F43.5°F
March 2239.9°F40.5°F35.8°F44.8°F
March 2339.4°F40.5°F35.6°F45.5°F
March 2439.6°F40.1°F35.8°F44.8°F
March 2538.7°F39.9°F35.8°F44.4°F
March 2639.2°F39.9°F35.8°F43°F
March 2739.4°F39.7°F35.8°F41.9°F
March 2839.6°F40.3°F36°F41.7°F
March 2939.6°F40.3°F36.1°F41.7°F
March 3039.2°F40.5°F36.3°F41.5°F
March 3139°F41.2°F36.3°F42.1°F
South Portland water temp chart in March

Average water temperature in South Portland in March over a decade

20162017201820192020
39°F38.1°F38.7°F37.2°F40.3°F
20212022202320242025
39.9°F39.7°F39.4°F40.3°F38.5°F

South Portland sea state in March

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

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 March?

Want to know where the water temperature in March 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 March. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

AvrMinMax
Portland38.7°F34.5°F45.5°F
Peaks Island38.7°F34.5°F45.3°F
Scarborough38.8°F35.2°F45.9°F
Higgins Beach38.8°F35.2°F45.9°F
Pine Point38.8°F35.2°F45.9°F
Cape Elizabeth39°F35.6°F45.7°F
Saco38.8°F35.4°F46°F
Yarmouth38.1°F33.8°F44.8°F
Casco Bay38.7°F34.3°F45°F
Biddeford Pool39°F36°F46°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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