South Boston water temp
This data the coastal South Boston 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 South Boston
Water temperature in South Boston today is 65.3°F. Based on our historical data over a period of ten years, the warmest water in this day in the Atlantic Ocean near South Boston was recorded in 2018 and was 70.7°F, and the coldest was recorded in 2017 at 62.1°F. Sea water temperature in South Boston is expected to drop to 64.4°F in the next 10 days. September average water temperature in South Boston is 64°F, the minimum temperature is 58.6°F, and the maximum is 71.2°F.
The swimming season in South Boston lasts from July to August. During those months, South Boston water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in South Boston in winter reaches 41.4°F, in spring 45°F, in summer the average temperature rises to 64.8°F, and in autumn it is 57.4°F.
South Boston water temperature now
| September 5, 2025 |
|---|
| today temp |
| 65.3°F |
| September 4, 2025 |
|---|
| yesterday temp |
| 66°F |
The ocean salinity in South Boston is 30.58‰, and the average salinity of the World Ocean is 35‰.
Surf Forecast in South Boston 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 South Boston. 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 South Boston. Data in table shown for September 5, 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' 7" | 1' 5" | 1' 5" | 1' 4" |
| 0.48 m | 0.43 m | 0.42 m | 0.41 m |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| 1' 7" | 1' 8" | 1' 10" | 1' 10" |
| 0.47 m | 0.51 m | 0.57 m | 0.55 m |
Surf report in South Boston
South Boston weather forecast
Current temperature and weather
Data in a table show South Boston temperature today (September 5, 2025). For more information and forecast for a few days, go to the weather forecast South Boston.
| 0-3 h | 3-6 h | 6-9 h | 9-12 h |
|---|---|---|---|
 | | |  |
| 65.7°F | 66.2°F | 66.9°F | 71.1°F |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
 | | | |
| 82°F | 83.5°F | 80.8°F | 72°F |
You may also be interested in other sections of our site for South Boston: Sunrise and Sunset, Tides
South Boston water temperature by month
These figures shows the average, minimum and maximum monthly sea temperature in South Boston. 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 South Boston 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 | 40.8°F | 35.2°F | 45.7°F | cold |
| Ocean water temperature in South Boston in January | ||||
| February | 38.1°F | 32.5°F | 42.1°F | cold |
| Ocean water temperature in South Boston in February | ||||
| March | 39°F | 34.5°F | 47.3°F | cold |
| Ocean water temperature in South Boston in March | ||||
| April | 43.9°F | 36.9°F | 50°F | cold |
| Ocean water temperature in South Boston in April | ||||
| May | 52°F | 43.7°F | 63.1°F | cold |
| Ocean water temperature in South Boston in May | ||||
| June | 60.3°F | 52.2°F | 68.7°F | cold |
| Ocean water temperature in South Boston in June | ||||
| July | 66.6°F | 59.7°F | 74.3°F | cold |
| Ocean water temperature in South Boston in July | ||||
| August | 67.3°F | 62.1°F | 73.2°F | cold |
| Ocean water temperature in South Boston in August | ||||
| September | 64°F | 58.6°F | 71.2°F | cold |
| Ocean water temperature in South Boston in September | ||||
| October | 57.6°F | 51.4°F | 64.4°F | cold |
| Ocean water temperature in South Boston in October | ||||
| November | 50.4°F | 43.3°F | 57.7°F | cold |
| Ocean water temperature in South Boston in November | ||||
| December | 45°F | 37.8°F | 50.2°F | cold |
| Ocean water temperature in South Boston in December | ||||
Chart monthly average water temperature in South Boston
