Weather in January
In Setauket- East Setauket, New York, in January, the average water temperature is 42.3°F (5.7°C). Note: Swimming in 42.3°F (5.7°C) is considered life-threatening. Weather in January »
Weather in February
February is the month with the coldest seawater in Setauket- East Setauket, New York, with an average ocean temperature of 39.7°F (4.3°C). Note: For swimming, this is considered life-threatening and very dangerous. Weather in February »
Weather in March
In March, the average ocean temperature in Setauket- East Setauket, New York, is 40.5°F (4.7°C). Note: During swimming activities, this situation is lethal and fraught with danger. Weather in March »
Weather in April
In April, the average ocean temperature in Setauket- East Setauket, New York, is 45.3°F (7.4°C). Note: In 45.3°F (7.4°C), even brief exposure to 55.4°F (13°C) feels biting, and anything less than 50°F (10°C) risks cold shock and impaired breathing, considering one's health. Weather in April »
Weather in May
In May, the average ocean temperature in Setauket- East Setauket, New York, is 53.4°F (11.9°C). Note: It is life-risking to swim in 53.4°F (11.9°C). Weather in May »
Weather in June
In Setauket- East Setauket, New York, in June, the average water temperature is 64.6°F (18.1°C). Note: Most individuals do not find swimming at 64.6°F (18.1°C) to be enjoyable. Weather in June »
Weather in July
In July, the average ocean temperature in Setauket- East Setauket, New York, is 72.1°F (22.3°C). Note: For those not fond of cold temperatures, taking a swim at 72.1°F (22.3°C) may require consideration of the sunshine, wind, and ambient temperature. Weather in July »
Weather in August
With an average ocean temperature of 73.9°F (23.3°C), August is the month with the warmest seawater in Setauket- East Setauket, New York. Note: Cold sensitivities vary, but with the right amount of sunshine, a gentle breeze, and a warm day, a swim in 73.9°F (23.3°C) waters might be just right. Weather in August »
Weather in September
In Setauket- East Setauket, New York, in September, the average water temperature is 69.6°F (20.9°C). Note: Swimming in water with a temperature of 69.6°F (20.9°C) is not a pleasurable experience for the majority. Weather in September »
Weather in October
In Setauket- East Setauket, New York, the average seawater temperature in October is 63.7°F (17.6°C). Note: Swimming in water at 63.7°F (17.6°C) is not a pleasurable experience for most. Weather in October »
Weather in November
In November, the average ocean temperature in Setauket- East Setauket, New York, is 55.6°F (13.1°C). Note: Swimming in 55.6°F (13.1°C) is considered life-threatening. Weather in November »
Weather in December
In Setauket- East Setauket, New York, the average seawater temperature in December is 48.9°F (9.4°C). Note: Swimming in 48.9°F (9.4°C) poses a severe threat. Weather in December »
Updated: Jul 5, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
When is the ocean coldest?
February is the month with the coldest seawater, with an average ocean temperature of 39.7°F (4.3°C).
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
When are the longest days?
June has the longest days of the year, with an average of 15h and 6min of daylight.
When is the ocean warmest?
August is the month with the warmest seawater, with an average ocean temperature of 73.9°F (23.3°C).
What is the month with the shortest days?
With an average of 9h and 18min of daylight, December has the shortest days of the year.
Average sea temperature
Setauket- East Setauket, NY
The best month for swimming (with the highest average sea temperature) is August (74°F).
The coldest month (with the lowest average sea temperature) is February (39.7°F).
Average daylight
Setauket- East Setauket, NY
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 3min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
Setauket- East Setauket, New York, USA
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