Great River water temp

This data the coastal Great River sea water temperature today, tomorrow and the upcoming days. Besides, you can also get information about the weather and surf forecast, as well as the data on sunrise / sunset and moonrise / moonset at a given point on any given day.

Current sea temperature in Great River

Water temperature in Great River today is 71.6°F. Based on our historical data over a period of ten years, the warmest water in this day in the Atlantic Ocean near Great River was recorded in 2018 and was 77°F, and the coldest was recorded in 2017 at 68.5°F. Sea water temperature in Great River is expected to drop to 71.4°F in the next 10 days. September average water temperature in Great River is 70.7°F, the minimum temperature is 61.9°F, and the maximum is 80.4°F.

The swimming season in Great River lasts from June to September. During those months, Great River water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Great River in winter reaches 42.8°F, in spring 47.3°F, in summer the average temperature rises to 71.1°F, and in autumn it is 63.3°F.

Great River water temperature now

The sea salinity in Great River is 29.78‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Great River for today

Another important indicators for a comfortable holiday on the beach are the presence and height of the waves, as well as the speed and direction of the wind. Please find below data on the swell size for Great River. We calculate the swell size based on the mean wave height (trough to crest) of each third highest wave. For more information on surf forecasts for the next ten days, please visit sea state forecast Great River. Data in table shown for September 6, 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Great River

Great River weather forecast

Current temperature and weather

Data in a table show Great River temperature today (September 6, 2025). For more information and forecast for a few days, go to the weather forecast Great River.

0-3 h	3-6 h	6-9 h	9-12 h
69.3°F	69.3°F	69.4°F	71.8°F

12-15 h	15-18 h	18-21 h	21-24 h
80.2°F	79.9°F	76.5°F	73.9°F

Great River water temperature by month

These figures shows the average, minimum and maximum monthly sea temperature in Great River. In addition to the table values, the graph below displays of changes average surface temperature during the year. Values are calculated based on the data over the past 10 years. Using them, you can check the water temperature in Great River on any day of this period that interests you. Click on the month link and you will see a table for each day, or alternatively you can view the temperature curve of the month and select 2 different years you want to compare, either in a table or as a curve

Chart monthly average water temperature in Great River

The nearest beaches and cities from Great River with the water temperature today, as well as the air temperature and the state of the weather during the day and the average wave height for today

	Water	Weather		Wave
New York City	71.4°F	82.4°F		1' 6"
West Sayville	71.4°F	78.8°F		3' 6"
Great South Bay	71.4°F	80.6°F		3' 2"
Bay Shore	71.6°F	80.6°F		3' 2"
Babylon	71.8°F	78.8°F
Kismet	71.4°F	80.6°F		4' 1"
Saltaire	71.4°F	80.6°F		4' 1"
Ocean Beach	71.1°F	80.6°F		4' 2"
Bayport Beach	71.1°F	78.8°F		3' 9"
Davis Park	70.7°F	78.8°F		3' 9"

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Our report for Great River 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.