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 13.31°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration.

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.

56.0

°F

October 15, 00:33

Trend:

decreasing

Yesterday:

56.6°F

Tomorrow:

55.8°F

Sunrise:

06:57

Sunset:

18:03

Day Length:

11 h. 6 min.

South Boston in October

Minimum:

39.2°F

Average:

41.1°F

Maximum:

44.2°F

Sea water temperature in South Boston today

As of now, in South Boston, the water temperature is 56.0°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is 2.9°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 61.9°F on 2021, while the historical minimum was 56.2°F on 2019.

latest data

last year

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the minimum recorded over the past years. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 54.7°F, the minimum temperature may reach 54.0°F, and the maximum might stay at 55.8°F.

Daily water temperature in South Boston

Date	Current Year actual* / forecast**	last year	10 years average
Oct 1	59.0°F	64.6°F	62.2°F
Oct 2	59.2°F	63.9°F	61.8°F
Oct 3	61.7°F	63.6°F	61.9°F
Oct 4	62.0°F	62.0°F	61.5°F
Oct 5	60.7°F	61.2°F	61.0°F
Oct 6	61.9°F	62.4°F	60.7°F
Oct 7	61.0°F	63.6°F	60.8°F
Oct 8	60.3°F	63.5°F	60.9°F
Oct 9	59.5°F	61.8°F	60.8°F
Oct 10	59.3°F	61.6°F	60.7°F
Oct 11	58.7°F	59.7°F	60.1°F
Oct 12	58.7°F	59.3°F	60.0°F
Oct 13	56.7°F	59.5°F	59.4°F
Oct 14	56.6°F	59.9°F	59.5°F
Oct 15	56.0°F	59.6°F	58.9°F
Oct 16	55.8°F	59.6°F	58.7°F
Oct 17	55.0°F	56.9°F	58.0°F
Oct 18	54.9°F	55.9°F	57.8°F
Oct 19	54.7°F	56.0°F	57.7°F
Oct 20	54.3°F	55.7°F	57.2°F
Oct 21	54.0°F	55.5°F	57.0°F
Oct 22	54.4°F	57.4°F	57.3°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 1, 2026, dipping to 32.0°F. The average readings by season are 40.7°F in Winter, 45.4°F in Spring, 65.2°F in Summer, and 58.0°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Boston	56.0°F	2mi
Salem	57.2°F	15mi
Plymouth	58.4°F	32mi
Providence	60.2°F	40mi
Bristol	60.8°F	47mi

* current water temperature in this city

** straight line distance from South Boston