World sea water temperatures

Water temperature in South Portland (ME) in December

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Is it warm enough to swim in South Portland in December? Average water temperature in South Portland in December is 45°F and therefore is not suitable for comfortable swimming. The warmest sea in South Portland in December is 51.1°F, and the coldest is 39.9°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 December 2024, 2023

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 December.

You can choose any other years:

Year 1:   Year 2:


Day 2024 2023 Min Max
December 147.5°F47.8°F45°F50.9°F
December 247.5°F48°F45.1°F51.1°F
December 347.3°F48°F45°F50.4°F
December 447.5°F47.8°F44.6°F50.4°F
December 547.3°F47.7°F43.9°F50.2°F
December 646.8°F47.1°F43.9°F50.2°F
December 746.4°F45.9°F43.5°F49.8°F
December 846.6°F45.5°F43.7°F49.6°F
December 946.6°F45.3°F43.7°F49.5°F
December 1046.4°F45.9°F43.5°F49.6°F
December 1146.2°F45.5°F43.5°F49.8°F
December 1245.1°F45.3°F43.3°F48.2°F
December 1344.6°F46.4°F43.2°F48.2°F
December 1444.6°F46.2°F42.8°F48.2°F
December 1545°F46.4°F42.6°F48°F
Day 2024 2023 Min Max
December 1644.4°F45.9°F42.4°F48°F
December 1744.2°F45.7°F42.1°F47.1°F
December 1844.2°F46.2°F41.5°F47.8°F
December 1944.2°F46.2°F41.4°F47.3°F
December 2044.8°F45.3°F41.4°F46.9°F
December 2143.3°F43.7°F41.5°F46.6°F
December 2242.3°F42.8°F41.4°F46.2°F
December 2342.4°F42.3°F41°F46°F
December 2443.2°F43°F41.2°F46.2°F
December 2543°F43.3°F41.4°F46°F
December 2643°F43.2°F41°F46.4°F
December 2743°F43.5°F40.5°F46.2°F
December 2842.8°F43.5°F40.3°F45.7°F
December 2943°F43.5°F41.4°F45.5°F
December 3042.3°F43.5°F40.8°F45.9°F
December 3141.5°F42.8°F39.9°F46.4°F
South Portland water temp chart in December

Average water temperature in South Portland in December over a decade

20152016201720182019
46.2°F47.1°F44.4°F43°F43.5°F
20202021202220232024
44.1°F47.8°F45.7°F45.3°F44.8°F

South Portland sea state in December

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

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 December?

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

AvrMinMax
Portland45°F39.9°F51.1°F
Peaks Island45.1°F40.1°F51.3°F
Scarborough45.3°F40.5°F51.3°F
Higgins Beach45.3°F40.5°F51.3°F
Pine Point45.3°F40.5°F50.9°F
Cape Elizabeth45.5°F40.6°F51.6°F
Saco45.3°F40.8°F50.7°F
Yarmouth44.6°F39.6°F49.6°F
Casco Bay45.3°F40.3°F50.9°F
Biddeford Pool45.7°F40.8°F51.3°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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