Roslyn water temp

This data the coastal Roslyn 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 Roslyn

Water temperature in Roslyn today is 69.4°F. Based on our historical data over a period of ten years, the warmest water in this day in Roslyn was recorded in 2021 and was 72.5°F, and the coldest was recorded in 2020 at 67.5°F. Sea water temperature in Roslyn is expected to drop to 67.1°F in the next 10 days. September average water temperature in Roslyn is 71.4°F, the minimum temperature is 65.7°F, and the maximum is 77.9°F.

The swimming season in Roslyn lasts from July to September. During those months, Roslyn water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Roslyn in winter reaches 40.6°F, in spring 47.1°F, in summer the average temperature rises to 70.3°F, and in autumn it is 63.1°F.

Roslyn water temperature now

The sea salinity in Roslyn is 28.94‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Roslyn 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 Roslyn. 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 Roslyn. Data in table shown for September 26, 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Roslyn

Roslyn weather forecast

Current temperature and weather

Data in a table show Roslyn temperature today (September 26, 2025). For more information and forecast for a few days, go to the weather forecast Roslyn.

0-3 h	3-6 h	6-9 h	9-12 h
71.4°F	70.7°F	69.4°F	71.6°F

12-15 h	15-18 h	18-21 h	21-24 h
78.1°F	84.4°F	81.1°F	75.4°F

Roslyn water temperature by month

These figures shows the average, minimum and maximum monthly sea temperature in Roslyn. 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 Roslyn 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 Roslyn

The nearest beaches and cities from Roslyn 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	69.8°F	86°F		1' 3"
Sands Point	69.4°F	84.2°F		0' 2"
East River	69.4°F	84.2°F		0' 2"
New Rochelle	69.4°F	84.2°F		0' 2"
City Island	69.4°F	84.2°F		0' 2"
Orchard Beach	69.4°F	84.2°F		0' 2"
Little Neck Bay	69.4°F	84.2°F		0' 2"
Manhasset Bay	69.4°F	84.2°F		0' 2"
Glenwood Landing	69.6°F	80.6°F		0' 2"
Sea Cliff	69.6°F	80.6°F		0' 2"

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Our report for Roslyn 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.