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Water temperature in Mastic Beach (NY) in August

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Is it warm enough to swim in Mastic Beach in August? Average water temperature in Mastic Beach in August is 72.9°F and therefore suitable for comfortable swimming. The warmest sea in Mastic Beach in August is 76.8°F, and the coldest is 68°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 August 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 August.

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024 Min Max
August 174.5°F73.4°F70.9°F76.1°F
August 272.3°F75.6°F70.2°F76.5°F
August 371.2°F75°F70.9°F75.9°F
August 471.4°F76.5°F70.9°F76.5°F
August 572.9°F75°F70.7°F75.9°F
August 672.7°F73.9°F70.7°F75.7°F
August 772.3°F73.8°F70.3°F76.1°F
August 871.1°F73.9°F70.7°F75.7°F
August 970.7°F74.1°F70.7°F76.6°F
August 1071.8°F73.4°F70.9°F76.3°F
August 1172.7°F72°F70.2°F75.7°F
August 1273°F71.2°F70.5°F76.3°F
August 1372.9°F71.6°F71.1°F76.3°F
August 1474.5°F71.1°F70.5°F76.8°F
August 1574.1°F71.6°F70.2°F76.5°F
Day 2025 2024 Min Max
August 1675.2°F71.2°F70.3°F76.5°F
August 1775.4°F72.3°F70.5°F75.7°F
August 1873.2°F72.5°F70.3°F75.6°F
August 1971.4°F73°F69.6°F75.6°F
August 2071.1°F71.1°F69.1°F75.4°F
August 2170.9°F70.2°F68.5°F75.4°F
August 2269.4°F70°F68°F74.7°F
August 2369.6°F70.2°F68°F75°F
August 2470.7°F70.7°F68.4°F75.6°F
August 2570.5°F70.9°F69.3°F75.6°F
August 2670.3°F70.7°F69.1°F75.4°F
August 2770.3°F70.9°F69.6°F75.4°F
August 2869.8°F72°F69.8°F76.8°F
August 2970.7°F72°F69.1°F75.2°F
August 3070.2°F70°F68.9°F75.2°F
August 3170.3°F70°F68.7°F74.3°F
Mastic Beach water temp chart in August

Average water temperature in Mastic Beach in August over a decade

20162017201820192020
74.7°F72°F73.6°F72.1°F74.5°F
20212022202320242025
73.2°F73.9°F71.1°F72.3°F72.1°F

Mastic Beach sea state in August

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

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 August?

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

AvrMinMax
New York City74.5°F69.4°F79.2°F
Westhampton72.5°F67.3°F76.6°F
East Quogue72.7°F67.8°F77°F
West Sayville74.1°F67.6°F81.9°F
Fire Island73.2°F67.5°F78.3°F
Flanders73.8°F68.2°F80.2°F
Great River74.5°F67.6°F82.8°F
Great South Bay73.8°F67.6°F80.1°F
The Hamptons72.5°F67.6°F77.5°F
Hampton Bays72.5°F67.6°F77.5°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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