Smithtown Sea Temperature

Looking to find out what the sea water temperature in Smithtown is for today and the next few days? Below are data and charts that will give you information about sea temperatures in Smithtown and nearby locations.

Water temperature in Smithtown right now

Below is the current sea temperature for Smithtown, United States on 29th March 2024.

6.43° C

(43.58° F)

  • yesterday: 6.3° C (43.35° F)
  • a week ago: 6.13° C (43.03° F)

This water is very cold and can cause pain. We don't recommend you swim in this temperature for anything other than very short swims of 5 to 10 minutes unless you are a very experienced cold water swimmer.

The average sea temperature for Smithtown on March 29th over the last 10 years is 4.41° C (39.93° F), with a low temperature of 0.79° C (33.42° F) and a high of 7.8° C (46.04° F).

Analysis and forecast for Smithtown water temperatures

The water temperature in Smithtown today is higher than the average temperature of 4.41° C (39.93° F) and the temperature on this day last year, 29th March 2023, was 6.23° C (43.21° F).

The chart and table below shows the change in water temperature in Smithtown over the last 30 days:

Date Temperature (Celsius) Temperature (Fahrenheit)
March 29 6.43° C 43.58° F
March 28 6.3° C 43.35° F
March 27 5.83° C 42.49° F
March 26 6.4° C 43.52° F
March 25 6.28° C 43.3° F
March 24 6.11° C 43° F
March 23 5.94° C 42.69° F
March 22 6.13° C 43.03° F
March 21 6.2° C 43.16° F
March 20 6.35° C 43.43° F
March 19 6.73° C 44.11° F
March 18 6.96° C 44.53° F
March 17 7.12° C 44.82° F
March 16 6.53° C 43.75° F
March 15 5.21° C 41.38° F
March 14 5.66° C 42.19° F
March 13 5.58° C 42.04° F
March 12 5.84° C 42.51° F
March 11 5.78° C 42.4° F
March 10 5.93° C 42.67° F
March 9 5.79° C 42.42° F
March 8 5.58° C 42.04° F
March 7 5.02° C 41.04° F
March 6 5.2° C 41.36° F
March 5 5.49° C 41.88° F
March 4 5.42° C 41.76° F
March 3 5.31° C 41.56° F
March 2 4.44° C 39.99° F
March 1 4.11° C 39.4° F
February 29 4.05° C 39.29° F
February 28 3.73° C 38.71° F

The actual nearshore temperatures may vary by several degrees and this can also be heavily affected by weather. Strong winds can cause cold, deep waters to replace the surface waters that had been warmed by the sun, and heavy rain can also reduce the temperature of the sea surface temperature as well.

Water temperature in Smithtown by month

The chart below shows the monthly average water temperature in Smithtown.

For more detailed information on how the sea temperature in Smithtown changes for each month of the year, choose from the months below.

Smithtown map and nearby water temperatures

Locations near Smithtown

The highest temperature in United States today is 25.44° C (77.8° F) in Boynton Beach. The lowest is in Nome, where the temperature of the water is -1.4° C (29.49° F).

Why measure sea surface temperatures (SST) in Smithtown?

The ocean covers about 71% of the Earth's surface, and scientists record the sea surface temperature (SST) of locations such as Smithtown because they want to understand and learn how the ocean communicates with the atomosphere of Earth.

SST is one measure that provides information on the global climate, and it can be used to predict the weather in Smithtown as well as atmospheric model simulations and to study marine ecosystems in the area.

Data source and citation

Raw data for the calculations made to find the sea surface temperature in Smithtown comes from the National Oceanic and Atmospheric Administration (NOAA) and their 1/4° daily Optimum Interpolation Sea Surface Temperature.

The water temperature data is constructed by combining observations from different platforms (satellites, ships, buoys, and Argo floats) on a regular global grid. A spatially complete sea surface temperature map is then built by interpolating to fill in gaps in the data.

If you'd like to use any of the information above in the format it is presented, please use the citation tool below.

  • "Smithtown Sea Temperature". SeaTemperatures.net. Accessed on March 29, 2024. http://seatemperatures.net/north-america/united-states/smithtown/.

  • "Smithtown Sea Temperature". SeaTemperatures.net, http://seatemperatures.net/north-america/united-states/smithtown/. Accessed 29 March, 2024

  • Smithtown Sea Temperature. SeaTemperatures.net. Retrieved from http://seatemperatures.net/north-america/united-states/smithtown/.