All data are in degrees Fahrenheit

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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

44.8

°F

April 12, 09:22

Trend:

increasing

Yesterday:

42.3°F

Tomorrow:

45.3°F

Sunrise:

06:09

Sunset:

19:22

Day Length:

13 h. 13 min.

South Boston in April

Minimum:

39.6°F

Average:

42.0°F

Maximum:

45.2°F

Sea water temperature in South Boston today

As of now, in South Boston, the water temperature is 44.8°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 1.9°F higher than the average recorded on this particular day in recent years. Since yesterday, there was a noticeable increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to rise a bit.

Recent sea temperature and forecast

Today's water temperature is notably higher than the average recorded over the past two weeks, indicating a significant warming trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 45.2°F on 2021, while the historical minimum was 40.7°F on 2018.

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 suggests a gradual increase. The average temperature is expected to rise up to 46.7°F, with minimum temperature starting at 45.3°F, while the maximum might reach 47.6°F.

Daily water temperature in South Boston

Date Current Year

actual* / forecast**

 last year 10 years average
Mar 29 40.4°F 41.1°F 41.2°F
Mar 30 40.5°F 41.0°F 41.2°F
Mar 31 41.6°F 40.9°F 41.6°F
Apr 1 40.9°F 40.8°F 41.4°F
Apr 2 40.9°F 42.5°F 41.7°F
Apr 3 41.2°F 41.6°F 42.0°F
Apr 4 41.8°F 41.5°F 41.9°F
Apr 5 43.6°F 41.5°F 42.3°F
Apr 6 42.9°F 42.6°F 42.0°F
Apr 7 42.2°F 42.3°F 42.2°F
Apr 8 42.7°F 42.1°F 42.4°F
Apr 9 41.5°F 43.3°F 42.8°F
Apr 10 42.2°F 42.5°F 42.9°F
Apr 11 42.3°F 42.2°F 42.9°F
Apr 12 44.8°F 41.9°F 42.9°F
Apr 13 45.3°F 41.9°F 43.4°F
Apr 14 46.2°F 41.9°F 44.3°F
Apr 15 46.3°F 41.3°F 44.4°F
Apr 16 46.9°F 43.8°F 45.0°F
Apr 17 47.2°F 43.4°F 45.2°F
Apr 18 47.6°F 45.1°F 45.7°F
Apr 19 47.4°F 43.3°F 45.5°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 1, 2026, dipping to 32.0°F. The average readings by season are 40.7°F in Winter, 45.4°F in Spring, 65.1°F in Summer, and 58.0°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Boston 44.8°F 2mi
Salem 42.1°F 15mi
Plymouth 43.8°F 32mi
Providence 46.8°F 40mi
Bristol 48.1°F 47mi

* current water temperature in this city

** straight line distance from South Boston