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Water temperature in Mastic Beach (NY) in April

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Is it warm enough to swim in Mastic Beach in April? Average water temperature in Mastic Beach in April is 45.3°F and therefore is not suitable for comfortable swimming. The warmest sea in Mastic Beach in April is 53.1°F, and the coldest is 37.9°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Mastic Beach

Changes water temperature in Mastic Beach in April 2025, 2024

To get an accurate forecast for the water temperature in Mastic Beach for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Mastic Beach, 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 143.7°F43.7°F37.9°F46.4°F
April 243°F43.3°F38.5°F47.3°F
April 343°F43.3°F38.5°F46.9°F
April 442.4°F43.5°F38.7°F47.8°F
April 543.2°F43.2°F38.8°F47.7°F
April 643.2°F43.2°F39.6°F47.3°F
April 743.3°F43.2°F39.7°F47.8°F
April 844.1°F43.3°F39.9°F48°F
April 943.9°F43.3°F39.7°F48°F
April 1043.3°F42.4°F40.1°F48.2°F
April 1143.3°F43°F40.1°F48.4°F
April 1243.5°F45.1°F40.6°F48.6°F
April 1344.1°F45.7°F41.4°F49.1°F
April 1444.8°F46°F41.5°F49.8°F
April 1545°F47.5°F41.4°F49.5°F
Day 2025 2024 Min Max
April 1644.2°F46.9°F41.4°F51.8°F
April 1744.8°F48°F41.4°F53.1°F
April 1845.5°F46.9°F41.4°F52.3°F
April 1945°F47.1°F41.7°F52°F
April 2044.8°F46.6°F41.9°F52.2°F
April 2144.6°F46.6°F42.6°F52.9°F
April 2245.1°F46.8°F43.3°F52.7°F
April 2347.7°F46.9°F43.7°F51.4°F
April 2448.4°F48.2°F43.7°F51.1°F
April 2548.4°F46.9°F43.9°F51.6°F
April 2648.4°F47.5°F44.4°F51.8°F
April 2748.9°F47.8°F44.8°F51.6°F
April 2848.9°F48.2°F45.9°F51.8°F
April 2949.3°F49.3°F45.9°F51.8°F
April 3049.8°F49.6°F45.9°F52°F
Mastic Beach water temp chart in April

Average water temperature in Mastic Beach in April over a decade

20162017201820192020
46.6°F45.7°F43°F45.7°F46.2°F
20212022202320242025
46.4°F46.2°F47.3°F45.7°F45.3°F

Mastic Beach sea state in April

Chart comparing the height of waves in Mastic Beach 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 Mastic Beach in April

Mastic Beach 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
New York City47.5°F40.3°F54°F
Westhampton45.1°F37.9°F53.1°F
East Quogue45.1°F37.6°F53.1°F
West Sayville46.2°F37.6°F55.9°F
Fire Island45.7°F37.8°F53.1°F
Flanders45.3°F36.7°F52.9°F
Great River46.4°F37.6°F56.5°F
Great South Bay46°F37.6°F54.5°F
The Hamptons45.1°F37.8°F52.9°F
Hampton Bays45.1°F37.8°F52.9°F

Mastic Beach photo gallery

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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 Mastic Beach 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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