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Great River — Water Temperature, Sea Conditions & Trends

This page provides clear and up-to-date information about water temperature for Great River (New York, United States). It includes the current water temperature, daily data for the last month presented in a simple chart, and a 7-day forecast. The page also compares today’s value with typical averages for this period, shows usual monthly ranges during the year, and lists nearby beaches with short descriptions. Local weather for the next few days and general details about Great River help you plan your visit and choose the best time for swimming.

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Current Water Temperature

18.5°C
Today
18.2°C
Yesterday
14.4°C
A Week Ago
Get instant access to real-time water temperatures for this and all other locations with our iOS and Android apps.

Water temperature in Great River in the Atlantic Ocean today is 19°C.

Water Temperature: Daily Trends, Historical Records, and Forecast

⚠️ As of today, the minimum water temperature ranges from 65°F (18°C) to 68°F (20°C). This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming.

It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.

Water Temperature Chart Over the Last 30 Days

From May 13 to June 13

Water temperature in Great River has risen over the last week and month. Currently, the sea water at this location is slightly warmer than average for this day in previous years.

According to our forecast, Water temperature in Great River will be 18.0°C in the next 7 days. See the table below for daily data for the upcoming week.

Table of Daily Sea Temperature Data

Date Current Average Forecast
JUN 514.6°C15.0°C
JUN 614.4°C15.3°C
JUN 715.8°C16.0°C
JUN 816.2°C16.3°C
JUN 916.8°C16.0°C
JUN 1017.3°C17.0°C
JUN 1117.7°C17.3°C
JUN 1218.2°C17.0°C
JUN 1318.5°C17.0°C18.5°C
JUN 1417.0°C18.4°C
JUN 1517.0°C18.4°C
JUN 1617.0°C18.3°C
JUN 1717.3°C18.2°C
JUN 1817.3°C18.2°C
JUN 1917.3°C18.1°C
JUN 2018.0°C18.0°C

* Current - Actual water temperature value

** Average - Average water temperature on this day in recent years

*** Forecast - Our water temperature forecast

Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.

Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts to enhance accuracy.

Water temperature data for this location is gathered from various sources, including buoys and satellite sea and ocean surface maps provided by the NOAA agency. We also incorporate data from local authorities in each specific location worldwide to ensure more accurate temperature readings.

Annual Water Temperature Overview by Month

Monthly Water Temp Ranges

30°C
25°C
20°C
15°C
10°c
5°C
0°C

Annual Water Temperature Trend

Monthly Water Temperature Range (Min, Max & Average)

Month Min Avg Max
January2°C6°C9°C
February2°C4°C7°C
March2°C5°C7°C
April4°C8°C12°C
May8°C12°C17°C
June13°C17°C23°C
July19°C23°C26°C
August20°C23°C26°C
September18°C21°C25°C
October13°C19°C23°C
November9°C14°C18°C
December5°C9°C13°C

* Click on a month to view detailed water temperature data.

Great River: Weather Forecast

June 13

° / °
overcast clouds: 85-100%
humidity: 64% | wind:

June 14

° / °
overcast clouds: 85-100%
humidity: 71% | wind:

June 15

° / °
scattered clouds: 25-50%
humidity: 76% | wind:

June 16

° / °
overcast clouds: 85-100%
humidity: 67% | wind:

Location, Beaches & Local Information

Nearby Beaches & Facilities

Heckscher State Park Overlook Beach⭐ 2.9/5

🌊 Sand📍

Heckscher State Park West Beach⭐ 2.9/5

🌊 Sand📍

East Islip Marina Park⭐ 5.0/5

🌊 Sand📍

Bayberry Beach And Tennis Club⭐ 4.6/5

🌊 Sand📍

Islip Town Beach⭐ 5.0/5

🌊 Sand📍

Sayville Beach⭐ 4.9/5

🌊 Sand📍

Sayville Marina Park⭐ 3.2/5

🌊 Sand📍

Benjamin's Memorial Beach⭐ 3.1/5

🌊 Sand📍

Bay Shore Manor Park⭐ 4.9/5

🌊 Sand📍

Map & Nearby Cities

Local Time, Time Zone & Daylight

✅ The Local Time 21:11
✅ Time Zone UTC-4
✅ Sunrise 05:21
✅ Sunset 20:23
✅ Length of the day 15 h 2 m

Frequently Asked Questions

What is the sea water temperature in Great River today?
Water temperature in Great River in the Atlantic Ocean today is 19°C.
In what months is the water temperature in Great River suitable for swimming?
The water temperature in Great River is suitable for swimming during the following months of the year: July, August, September. During this period, its value does not drop below 70°F (20°C).
What is the water temperature in Great River during the summer months?
During the summer, the water temperature in Great River ranges from 55°F (13.0°C) to 79°F (26.0°C).
What is the water temperature in Great River in spring?
During the spring, the water temperature in Great River ranges from 36°F (2.0°C) to 63°F (17.0°C).
What is the water temperature in Great River in autumn?
During the autumn, the water temperature in Great River ranges from 48°F (9.0°C) to 77°F (25.0°C).
What is the water temperature in Great River in winter?
During the winter, the water temperature in Great River ranges from 36°F (2.0°C) to 55°F (13.0°C).
What are the most popular beaches in Great River?
The most popular beaches in Great River are: Fair Harbor Ocean, East Islip Marina Park, Dunewood Yacht Club, Islip Town Beach, Fair Harbor Community Association - Bay.
What sea temperature can I expect in Great River next month?
Next month (July), the water temperature in Great River is expected to be in the range of 19°C - 26°C.