Shelter Island Heights water temp
This data the coastal Shelter Island Heights ocean 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 ocean temperature in Shelter Island Heights
Water temperature in Shelter Island Heights today is 69.4°F. Based on our historical data over a period of ten years, the warmest water in this day in the Atlantic Ocean near Shelter Island Heights was recorded in 2021 and was 71.6°F, and the coldest was recorded in 2013 at 66°F. Sea water temperature in Shelter Island Heights is expected to drop to 66.4°F in the next 10 days. September average water temperature in Shelter Island Heights is 70.2°F, the minimum temperature is 65.7°F, and the maximum is 76.5°F.
The swimming season in Shelter Island Heights lasts from July to September. During those months, Shelter Island Heights water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Shelter Island Heights in winter reaches 42.1°F, in spring 46°F, in summer the average temperature rises to 69.3°F, and in autumn it is 63.1°F.
Shelter Island Heights water temperature now
| September 25, 2025 |
|---|
| today temp |
| 69.4°F |
| September 24, 2025 |
|---|
| yesterday temp |
| 69.6°F |
The ocean salinity in Shelter Island Heights is 26.73‰, and the average salinity of the World Ocean is 35‰.
Surf Forecast in Shelter Island Heights 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 Shelter Island Heights. 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 Shelter Island Heights. 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)
| 0-3 h | 3-6 h | 6-9 h | 9-12 h |
|---|---|---|---|
| 0' 11" | 0' 10" | 0' 11" | 1' 5" |
| 0.28 m | 0.26 m | 0.27 m | 0.44 m |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| 1' 9" | 1' 6" | 1' 4" | 1' 10" |
| 0.53 m | 0.46 m | 0.41 m | 0.55 m |
Surf report in Shelter Island Heights
Shelter Island Heights weather forecast
Current temperature and weather
Data in a table show Shelter Island Heights temperature today (September 26, 2025). For more information and forecast for a few days, go to the weather forecast Shelter Island Heights.
| 0-3 h | 3-6 h | 6-9 h | 9-12 h |
|---|---|---|---|
 | |  |  |
| 67.3°F | 66.9°F | 68.2°F | 69.4°F |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| | | |
| 70.5°F | 70.2°F | 70.3°F | 70°F |
You may also be interested in other sections of our site for Shelter Island Heights: Sunrise and Sunset, Tides
Shelter Island Heights water temperature by month
These figures shows the average, minimum and maximum monthly sea temperature in Shelter Island Heights. 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 Shelter Island Heights 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 Shelter Island Heights
