Southold water temp
This data the coastal Southold 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 Southold
Water temperature in Southold today is 70.5°F. Based on our historical data over a period of ten years, the warmest water in this day in the Atlantic Ocean near Southold was recorded in 2021 and was 72.1°F, and the coldest was recorded in 2013 at 65.8°F. Sea water temperature in Southold is expected to drop to 66.2°F in the next 10 days. September average water temperature in Southold is 70.3°F, the minimum temperature is 65.5°F, and the maximum is 77.4°F.
The swimming season in Southold lasts from July to September. During those months, Southold water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Southold in winter reaches 42.1°F, in spring 46.2°F, in summer the average temperature rises to 70°F, and in autumn it is 63.1°F.
Southold water temperature now
| September 27, 2025 |
|---|
| today temp |
| 70.5°F |
| September 26, 2025 |
|---|
| yesterday temp |
| 69.1°F |
The ocean salinity in Southold is 27.06‰, and the average salinity of the World Ocean is 35‰.
Surf Forecast in Southold 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 Southold. 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 Southold. Data in table shown for September 27, 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 |
|---|---|---|---|
| 1' 0" | 0' 10" | 0' 9" | 0' 7" |
| 0.3 m | 0.26 m | 0.22 m | 0.19 m |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| 0' 6" | 0' 6" | 0' 6" | 0' 5" |
| 0.16 m | 0.15 m | 0.14 m | 0.13 m |
Surf report in Southold
Southold weather forecast
Current temperature and weather
Data in a table show Southold temperature today (September 27, 2025). For more information and forecast for a few days, go to the weather forecast Southold.
| 0-3 h | 3-6 h | 6-9 h | 9-12 h |
|---|---|---|---|
 | | |  |
| 68.2°F | 66.4°F | 64.8°F | 67.5°F |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
 | |  |  |
| 70.7°F | 70.9°F | 69.1°F | 66.2°F |
You may also be interested in other sections of our site for Southold: Sunrise and Sunset, Tides
Southold water temperature by month
These figures shows the average, minimum and maximum monthly sea temperature in Southold. 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 Southold 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
| Month | Avr | Min | Max | |
|---|---|---|---|---|
| January | 41°F | 34.9°F | 48.4°F | cold |
| Ocean water temperature in Southold in January | ||||
| February | 37.9°F | 32.4°F | 43.3°F | cold |
| Ocean water temperature in Southold in February | ||||
| March | 39.7°F | 32.9°F | 49.6°F | cold |
| Ocean water temperature in Southold in March | ||||
| April | 45.3°F | 36.3°F | 52.9°F | cold |
| Ocean water temperature in Southold in April | ||||
| May | 53.6°F | 45.7°F | 64.2°F | cold |
| Ocean water temperature in Southold in May | ||||
| June | 63.7°F | 55.6°F | 74.7°F | cold |
| Ocean water temperature in Southold in June | ||||
| July | 72.3°F | 63.5°F | 80.6°F | warm |
| Ocean water temperature in Southold in July | ||||
| August | 73.8°F | 67.8°F | 80.6°F | warm |
| Ocean water temperature in Southold in August | ||||
| September | 70.3°F | 65.5°F | 77.4°F | warm |
| Ocean water temperature in Southold in September | ||||
| October | 63.7°F | 56.8°F | 70.5°F | cold |
| Ocean water temperature in Southold in October | ||||
| November | 55.4°F | 48.9°F | 63°F | cold |
| Ocean water temperature in Southold in November | ||||
| December | 47.3°F | 40.3°F | 53.1°F | cold |
| Ocean water temperature in Southold in December | ||||
Chart monthly average water temperature in Southold
