What is the current water temperature in South Boston?

Q: What is the current water temperature in South Boston?

As of now, in South Boston, the water temperature is 16.34°F. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it.

United States > South Boston

Water temperature in South Boston

Detailed information about the current water temperature in South Boston. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.

61.4

°F

September 17, 22:09

Trend:

decreasing

Yesterday:

62.4°F

Tomorrow:

61.2°F

Sunrise:

06:26

Sunset:

18:51

Day Length:

12 h. 25 min.

South Boston in September

Minimum:

38.5°F

Average:

41.2°F

Maximum:

44.1°F

Sea water temperature in South Boston today

As of now, in South Boston, the water temperature is 61.4°F. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it. Today's reading is 3.5°F lower than the average recorded on this particular day in recent years. The sea temperature remains approximately unchanged from yesterday. According to the forecast, we expect the temperature to fall a bit.

Recent sea temperature and forecast

Today's water temperature is considerably lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 67.4°F on 2023, while the historical minimum was 63.1°F on 2019.

latest data

last year

Observations from the last two weeks indicate that the water temperature was in proximity to the lowest values recorded on those days in the past. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 60.5°F, the minimum temperature may reach 59.8°F, and the maximum might stay at 61.2°F.

Daily water temperature in South Boston

Date	Current Year actual* / forecast**	last year	10 years average
Sep 3	65.0°F	67.8°F	66.4°F
Sep 4	65.7°F	65.7°F	66.1°F
Sep 5	64.9°F	65.6°F	66.1°F
Sep 6	64.8°F	65.6°F	66.1°F
Sep 7	66.1°F	64.7°F	66.5°F
Sep 8	65.7°F	64.7°F	66.2°F
Sep 9	63.5°F	65.8°F	66.2°F
Sep 10	61.8°F	64.6°F	66.1°F
Sep 11	61.3°F	64.6°F	65.9°F
Sep 12	60.1°F	63.9°F	65.3°F
Sep 13	61.8°F	64.4°F	65.4°F
Sep 14	60.7°F	64.9°F	65.1°F
Sep 15	62.1°F	65.6°F	65.3°F
Sep 16	62.4°F	64.8°F	65.0°F
Sep 17	61.4°F	64.7°F	65.0°F
Sep 18	61.2°F	64.7°F	64.7°F
Sep 19	61.1°F	65.5°F	64.6°F
Sep 20	60.8°F	65.1°F	64.3°F
Sep 21	60.3°F	64.3°F	63.9°F
Sep 22	60.2°F	63.6°F	63.8°F
Sep 23	60.2°F	63.0°F	63.7°F
Sep 24	59.8°F	61.5°F	63.3°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Sea water temperature in South Boston by month

In an average year, South Boston offers no days when the water temperature is warm enough to swim comfortably.

The warmest water in South Boston was recorded on July 29, 2020, reaching a 75.0°F. While the coldest temperature occurred on February 11, 2025, dipping to 32.5°F. The average readings by season are 41.1°F in Winter, 45.1°F in Spring, 65.0°F in Summer, and 58.0°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Boston	61.4°F	2mi
Salem	60.7°F	15mi
Plymouth	64.5°F	32mi
Providence	68.9°F	40mi
Bristol	69.6°F	47mi

* current water temperature in this city

** straight line distance from South Boston