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Water temperature in Great South Bay (NY) in March

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Is it warm enough to swim in Great South Bay in March? Average water temperature in Great South Bay in March is 40.8°F and therefore is not suitable for comfortable swimming. The warmest sea in Great South Bay in March is 50.2°F, and the coldest is 32.4°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Great South Bay

Changes water temperature in Great South Bay in March 2025, 2024

To get an accurate forecast for the water temperature in Great South Bay for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Great South Bay, 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°F40.3°F34.2°F43°F
March 237°F40.3°F33.4°F42.8°F
March 337°F42.6°F33.4°F43.7°F
March 437.4°F43.2°F32.4°F44.1°F
March 537.6°F42.6°F32.4°F43.2°F
March 638.1°F42.4°F33.1°F42.8°F
March 739.4°F42.3°F33.1°F42.8°F
March 839.9°F43.2°F33.4°F43.9°F
March 939.6°F43°F33.6°F45°F
March 1040.6°F43.9°F34°F43.9°F
March 1141.2°F43.2°F34.5°F44.1°F
March 1242.1°F43.7°F34.3°F44.2°F
March 1340.8°F42.6°F34.3°F45.1°F
March 1440.8°F44.1°F34.5°F45.9°F
March 1543.2°F43.5°F34.7°F45.3°F
Day 2025 2024 Min Max
March 1639.7°F45.1°F34.9°F45.1°F
March 1739.6°F45.9°F35.1°F45.9°F
March 1841.7°F46.9°F35.2°F46.9°F
March 1941.7°F45.1°F35.6°F46.8°F
March 2041.2°F45.5°F35.4°F46.8°F
March 2142.8°F44.2°F35.4°F47.1°F
March 2243.5°F44.2°F35.4°F48.6°F
March 2343.3°F44.2°F35.6°F50.2°F
March 2443.3°F43.3°F35.8°F48.7°F
March 2544.4°F43.2°F36.3°F48.2°F
March 2643.5°F42.8°F37°F47.7°F
March 2743.5°F43.2°F36.7°F47.5°F
March 2844.1°F43.2°F36.7°F47.1°F
March 2945.1°F43.9°F37°F47.1°F
March 3044.6°F43.9°F37.2°F47.5°F
March 3145.3°F44.8°F37.2°F46.9°F
Great South Bay water temp chart in March

Average water temperature in Great South Bay in March over a decade

20162017201820192020
42.6°F40.6°F40.3°F39.6°F43.7°F
20212022202320242025
40.5°F41.5°F42.8°F43.5°F41.4°F

Great South Bay sea state in March

Chart comparing the height of waves in Great South Bay 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 Great South Bay in March

Great South Bay 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
New York City41.2°F35.1°F50.5°F
Kismet40.6°F32.7°F50.4°F
Saltaire40.6°F32.7°F50.4°F
Ocean Beach40.8°F32.9°F50.4°F
Democrat Point40.8°F32.7°F50.4°F
Fire Island Pines40.8°F33.4°F50.4°F
Oak Beach40.8°F32.7°F50.4°F
Davis Park40.8°F33.6°F50.4°F
Bayport Beach40.8°F33.4°F50.4°F
Cedar Beach40.8°F32.9°F50.4°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 Great South Bay 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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