Port Jefferson Sea Temperature in October

Looking to find out what the average sea water temperature in Port Jefferson is for October? Find out what the lowest, highest, and average water temperatures are for Port Jefferson over the past 10 years.

Average water temperature in Port Jefferson for October

The average, high, and low temperatures below should help you if you can swim in the water in Port Jefferson in October.

18.88° C

(65.99° F)

  • highest: 25.16° C (77.29° F)
  • lowest: 13.56° C (56.41° F)

At this temperature, water will feel cold compared to a swimming pool, but with a bit of experience and practice most people will find the water relatively comfortable to swim in.

Water temperature range by day in October in Port Jefferson

The chart below shows the range of low and high temperatures by day for the month of October in Port Jefferson.

Water temperatures for October in Port Jefferson in recent years

Day 2024 2023 2022 2021
1 0° C 19.25° C 20.56° C 23.27° C
2 0° C 19.28° C 20.3° C 23.3° C
3 0° C 19.4° C 20° C 23.57° C
4 0° C 19.49° C 19.76° C 24.1° C
5 0° C 19.56° C 18.93° C 24.65° C
6 0° C 19.65° C 18.57° C 24.48° C
7 0° C 19.57° C 18.36° C 23.54° C
8 0° C 19.04° C 18.01° C 22.88° C
9 0° C 18.64° C 17.69° C 23.3° C
10 0° C 18.47° C 17.47° C 24.16° C
11 0° C 18.44° C 17.34° C 25.16° C
12 0° C 18.46° C 17.3° C 24.81° C
13 0° C 18.38° C 17.33° C 23.58° C
14 0° C 18.26° C 17.46° C 23.61° C
15 0° C 18.02° C 17.52° C 22.99° C
16 0° C 17.82° C 17.53° C 23.5° C
17 0° C 17.72° C 17.48° C 24.15° C
18 0° C 17.6° C 17.3° C 24.3° C
19 0° C 17.54° C 17.14° C 22.93° C
20 0° C 17.4° C 17.02° C 22.05° C
21 0° C 17.22° C 16.87° C 20.57° C
22 0° C 17.26° C 16.8° C 20.05° C
23 0° C 17.1° C 16.75° C 19.8° C
24 0° C 17.01° C 16.87° C 19.77° C
25 0° C 17.14° C 16.93° C 19.73° C
26 0° C 17.23° C 16.86° C 19.67° C
27 0° C 17.27° C 16.8° C 19.1° C
28 0° C 17.3° C 16.59° C 19.24° C
29 0° C 17.18° C 16.31° C 19.02° C
30 0° C 16.59° C 16.19° C 18.77° C
31 0° C 16.33° C 16.03° C 17.35° C

Water temperature in October for locations near Port Jefferson

Mount Sinai

United States, North America

2.07 miles away

East Setauket

United States, North America

2.10 miles away

Miller Place

United States, North America

3.92 miles away

Stony Brook

United States, North America

4.01 miles away

Nissequogue

United States, North America

7.33 miles away

Shoreham

United States, North America

8.47 miles away

Data source and citation

Raw data for the calculations made to find the sea surface temperature in Port Jefferson 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.

  • "Port Jefferson Sea Temperature in October". SeaTemperatures.net. Accessed on May 4, 2024. http://seatemperatures.net/north-america/united-states/port-jefferson-october-temperature/.

  • "Port Jefferson Sea Temperature in October". SeaTemperatures.net, http://seatemperatures.net/north-america/united-states/port-jefferson-october-temperature/. Accessed 4 May, 2024

  • Port Jefferson Sea Temperature in October. SeaTemperatures.net. Retrieved from http://seatemperatures.net/north-america/united-states/port-jefferson-october-temperature/.