Stony Brook Water Temperature

(Today) 2025

3.6°C / 38.5°F

The water will feel freezing / baltic. You would have to be insane or getting paid to want to get in water this cold! If you do make sure you are wearing a top end drysuit and all the accessories.

Current weather

-3°C / 26°F
(overcast clouds)
Partly cloudy
Wind
7 mph
Humidity
83%

The measurements for the water temperature in Stony Brook, New York are provided by the daily satellite readings provided by the NOAA. The temperatures given are the sea surface temperature (SST) which is most relevant to recreational users.

*Live data may vary from satellite readings for a number of reasons. These include local factors, depth of smapling and time of day.

Water temp by month

Monthly average max / min water temperatures

The graph below shows the range of monthly Stony Brook water temperature derived from many years of historical sea surface temperature data.

Stony Brook average maximum / minimum water temperatures
Maximum and minimum monthly sea temperatures in Stony Brook
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 3.2 2.6 2.7 3.9 8.2 14.4 20.1 21.6 19.1 14.3 10.9 6.3
Max °C 8.3 6.2 7 11.6 16.3 22.2 24.5 25.2 23.2 20.9 14.6 11.6
Min °F 39.8 38.1 38.5 42.1 50 61 69.9 72.3 68 60.4 53.1 45.4
Max °F 44.9 41.7 42.8 49.8 58.1 68.8 74.3 75.9 72.1 67 56.8 50.7

The warmest water temperature is in August with an average around 74.1°F / 23.4°C. The coldest month is February with an average water temperature of 39.9°F / 4.4°C.

7 day tide forecast for Stony Brook

FriSatSunMonTueWedThu
  • High 1:21am
    (1.8m)
  • Low 7:35am
    (0.04m)
  • High 1:37pm
    (1.83m)
  • Low 7:59pm
    (0.01m)
  • High 2:02am
    (1.78m)
  • Low 8:20am
    (0.09m)
  • High 2:20pm
    (1.74m)
  • Low 8:39pm
    (0.07m)
  • High 2:45am
    (1.75m)
  • Low 9:06am
    (0.14m)
  • High 3:04pm
    (1.65m)
  • Low 9:22pm
    (0.14m)
  • High 3:30am
    (1.72m)
  • Low 9:54am
    (0.2m)
  • High 3:51pm
    (1.57m)
  • Low 10:08pm
    (0.21m)
  • High 4:17am
    (1.69m)
  • Low 10:45am
    (0.24m)
  • High 4:42pm
    (1.51m)
  • Low 10:57pm
    (0.27m)
  • High 5:08am
    (1.69m)
  • Low 11:40am
    (0.26m)
  • High 5:36pm
    (1.47m)
  • Low 11:49pm
    (0.31m)
  • High 6:01am
    (1.7m)
  • Low 12:36pm
    (0.26m)
  • High 6:33pm
    (1.47m)
7 day tide times for Stony Brook

*These tide times are estimates based on the nearest accurate location (Stony Brook, Smithtown Bay, Long Island Sound, New York) and may differ by up to half an hour depending on distance. Please note, the tide times given are not suitable for navigational purposes.