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 16.25°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.

61.3

°F

October 8, 00:18

Trend:

stable

Yesterday:

61.0°F

Tomorrow:

61.2°F

Sunrise:

06:49

Sunset:

18:14

Day Length:

11 h. 25 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 61.3°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 0.2°F higher than the average recorded on this particular day in recent years. Since yesterday, there was a slight increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to stay about the same.

Recent sea temperature and forecast

Today's water temperature closely matches the previous two weeks' average, indicating a stable trend. It also aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 63.5°F on 2025, while the historical minimum was 58.7°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 60.3°F, the minimum temperature may reach 59.1°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 24	63.0°F	63.7°F	63.3°F
Sep 25	62.0°F	63.3°F	63.1°F
Sep 26	61.4°F	63.6°F	62.6°F
Sep 27	62.2°F	64.9°F	62.9°F
Sep 28	61.2°F	65.0°F	62.9°F
Sep 29	60.7°F	66.8°F	63.1°F
Sep 30	60.1°F	65.4°F	62.6°F
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	61.3°F	63.5°F	61.0°F
Oct 9	61.2°F	61.8°F	61.0°F
Oct 10	61.1°F	61.6°F	60.9°F
Oct 11	60.5°F	59.7°F	60.3°F
Oct 12	60.3°F	59.3°F	60.1°F
Oct 13	59.9°F	59.5°F	59.6°F
Oct 14	59.7°F	59.9°F	59.5°F
Oct 15	59.1°F	59.6°F	58.9°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	61.3°F	2mi
Salem	59.5°F	15mi
Plymouth	61.3°F	32mi
Providence	63.8°F	40mi
Bristol	64.3°F	47mi

* current water temperature in this city

** straight line distance from South Boston