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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.
Sea temperature in South Boston now

54.2

°F

October 31, 07:06

Trend:

decreasing

Yesterday:

54.5°F

Tomorrow:

54.2°F

Sunrise:

07:16

Sunset:

17:39

Day Length:

10 h. 23 min.

South Boston in November

Minimum:

38.4°F

Average:

41.0°F

Maximum:

44.7°F

Sea water temperature in South Boston today

As of now, in South Boston, the water temperature is 54.2°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 about the same as 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 stay about the same.

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 also aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 57.9°F on 2023, while the historical minimum was 52.2°F on 2019.

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 53.7°F, the minimum temperature may reach 53.1°F, and the maximum might stay at 54.2°F.

Daily water temperature in South Boston

Date Current Year

actual* / forecast**

 last year 10 years average
Oct 17 56.9°F 56.3°F 57.8°F
Oct 18 55.9°F 56.7°F 57.7°F
Oct 19 56.0°F 56.4°F 57.4°F
Oct 20 55.7°F 54.6°F 57.0°F
Oct 21 55.5°F 55.8°F 56.7°F
Oct 22 57.4°F 57.1°F 57.0°F
Oct 23 58.1°F 56.7°F 56.9°F
Oct 24 57.1°F 57.7°F 56.7°F
Oct 25 56.2°F 57.4°F 56.2°F
Oct 26 56.1°F 56.6°F 56.0°F
Oct 27 54.4°F 56.4°F 55.5°F
Oct 28 55.0°F 56.0°F 55.7°F
Oct 29 54.9°F 55.0°F 55.3°F
Oct 30 54.5°F 54.3°F 54.9°F
Oct 31 54.2°F 54.0°F 54.3°F
Nov 1 54.2°F 54.5°F 54.3°F
Nov 2 54.2°F 56.9°F 54.3°F
Nov 3 54.0°F 54.5°F 54.2°F
Nov 4 53.6°F 53.2°F 53.7°F
Nov 5 53.3°F 52.9°F 53.4°F
Nov 6 53.1°F 54.3°F 53.2°F
Nov 7 53.2°F 55.9°F 53.4°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

January

February

March

April

May

June

July

August

September

October

November

December

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 54.2°F 2mi
Salem 54.5°F 15mi
Plymouth 55.0°F 32mi
Providence 57.3°F 40mi
Bristol 57.8°F 47mi

* current water temperature in this city

** straight line distance from South Boston