World sea water temperatures

Water temperature in Siasconset (MA) in May

Is it warm enough to swim in Siasconset in May? Average water temperature in Siasconset in May is 49.5°F and therefore is not suitable for comfortable swimming. The warmest sea in Siasconset in May is 59.2°F, and the coldest is 44.1°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Siasconset

Changes water temperature in Siasconset in May 2025, 2024

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

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024 Min Max
May 147.8°F46.2°F44.4°F49.3°F
May 248.2°F46.4°F44.6°F49.6°F
May 349.1°F47.1°F44.1°F49.1°F
May 448°F46.8°F44.8°F48.6°F
May 547.7°F46.6°F45°F48.7°F
May 647.8°F46.6°F45.3°F49.5°F
May 750.5°F47.3°F45.3°F50.5°F
May 849.3°F48°F45.9°F49.6°F
May 947.7°F47.3°F44.6°F50°F
May 1049.8°F47.8°F45.7°F49.8°F
May 1149.8°F46.8°F45.1°F50.4°F
May 1250.2°F47.1°F45.3°F53.4°F
May 1348.6°F47.5°F45.3°F53.1°F
May 1448.6°F47.8°F45°F52.5°F
May 1550°F48.4°F45.9°F51.4°F
Day 2025 2024 Min Max
May 1649.5°F48.6°F46.4°F53.2°F
May 1751.3°F48.6°F45.9°F53.1°F
May 1851.3°F49.3°F47.1°F53.2°F
May 1951.3°F50.7°F46.8°F53.1°F
May 2051.3°F47.8°F46.6°F53.6°F
May 2150°F48.7°F48°F53.8°F
May 2252°F50°F48.4°F54.5°F
May 2349.5°F51.6°F49.1°F55°F
May 2450°F51.4°F49.3°F55°F
May 2550.2°F52.7°F49.8°F55.8°F
May 2651.4°F52.5°F49.8°F57°F
May 2751.4°F53.1°F49.8°F56.5°F
May 2852°F53.2°F50°F57.2°F
May 2952.2°F53.1°F49.6°F59°F
May 3053.6°F52.3°F50.4°F58.8°F
May 3151.8°F53.6°F50.4°F59.2°F
Siasconset water temp chart in May

Average water temperature in Siasconset in May over a decade

20162017201820192020
49.5°F48.4°F48.2°F47.8°F48.4°F
20212022202320242025
50.5°F49.8°F50.7°F49.1°F50°F

Siasconset sea state in May

Chart comparing the height of waves in Siasconset in May 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 Siasconset in May

Siasconset 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 May?

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

AvrMinMax
Jetties Beach50.9°F45°F60.3°F
Coskata Beach50.7°F44.6°F60.1°F
Cisco Beach50.7°F45.1°F60.4°F
Dionis Beach51.3°F45.1°F60.6°F
Madaket Beach51.4°F45.1°F61.2°F
Morris Island49.5°F43.7°F60.4°F
Hardings Beach50°F44.2°F60.8°F
Red River Beach50.5°F44.4°F61.2°F
Bank Street Beach51.3°F44.8°F61.5°F
South Beach52.3°F46.2°F62.8°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 Siasconset 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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