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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

45.5

°F

November 25, 15:57

Trend:

stable

Yesterday:

45.1°F

Tomorrow:

45.3°F

Sunrise:

06:47

Sunset:

16:15

Day Length:

9 h. 28 min.

South Boston in December

Minimum:

38.8°F

Average:

41.1°F

Maximum:

43.8°F

Sea water temperature in South Boston today

As of now, in South Boston, the water temperature is 45.5°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 2.7°F lower 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 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 50.6°F on 2016, while the historical minimum was 45.9°F on 2020.

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 44.8°F, the minimum temperature may reach 44.4°F, and the maximum might stay at 45.3°F.

Daily water temperature in South Boston

Date Current Year

actual* / forecast**

 last year 10 years average
Nov 11 50.4°F 53.2°F 51.8°F
Nov 12 49.8°F 53.1°F 51.7°F
Nov 13 49.8°F 53.1°F 51.7°F
Nov 14 49.5°F 52.8°F 51.4°F
Nov 15 48.8°F 50.1°F 50.9°F
Nov 16 49.0°F 49.8°F 50.5°F
Nov 17 49.3°F 49.0°F 49.8°F
Nov 18 49.1°F 49.0°F 49.7°F
Nov 19 47.4°F 49.7°F 49.4°F
Nov 20 47.5°F 49.4°F 49.2°F
Nov 21 44.9°F 49.4°F 49.0°F
Nov 22 45.3°F 49.0°F 48.8°F
Nov 23 44.0°F 49.2°F 48.6°F
Nov 24 45.1°F 47.6°F 48.3°F
Nov 25 45.5°F 47.4°F 48.1°F
Nov 26 45.3°F 47.3°F 48.0°F
Nov 27 45.3°F 46.9°F 48.0°F
Nov 28 45.0°F 45.7°F 47.6°F
Nov 29 44.7°F 46.1°F 47.4°F
Nov 30 44.4°F 45.3°F 47.1°F
Dec 1 44.6°F 46.0°F 47.3°F
Dec 2 44.4°F 45.7°F 47.1°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 45.5°F 2mi
Salem 48.5°F 15mi
Plymouth 46.5°F 32mi
Providence 47.7°F 40mi
Bristol 46.7°F 47mi

* current water temperature in this city

** straight line distance from South Boston