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 21.59°F. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool.

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.

70.9

°F

July 15, 14:25

Trend:

increasing

Yesterday:

69.7°F

Tomorrow:

71.3°F

Sunrise:

05:21

Sunset:

20:19

Day Length:

14 h. 58 min.

South Boston in July

Minimum:

39.3°F

Average:

41.5°F

Maximum:

44.4°F

Sea water temperature in South Boston today

As of now, in South Boston, the water temperature is 70.9°F. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool. Today's reading is 4.3°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 70.4°F on 2019, while the historical minimum was 63.8°F on 2021.

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 maximum recorded over the past years. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 71.5°F, with minimum temperature starting at 71.2°F, while the maximum might reach 72.3°F.

Daily water temperature in South Boston

Date	Current Year actual* / forecast**	last year	10 years average
Jul 1	65.8°F	64.4°F	64.3°F
Jul 2	66.6°F	64.0°F	64.4°F
Jul 3	66.9°F	63.7°F	64.7°F
Jul 4	69.2°F	66.7°F	65.6°F
Jul 5	69.4°F	66.0°F	65.5°F
Jul 6	69.2°F	66.0°F	65.9°F
Jul 7	68.8°F	66.1°F	66.3°F
Jul 8	66.4°F	67.0°F	66.2°F
Jul 9	66.2°F	69.9°F	66.7°F
Jul 10	68.1°F	69.3°F	66.7°F
Jul 11	70.5°F	68.6°F	66.9°F
Jul 12	70.1°F	68.6°F	67.2°F
Jul 13	70.3°F	68.4°F	67.4°F
Jul 14	69.7°F	69.7°F	67.8°F
Jul 15	70.9°F	68.4°F	66.6°F
Jul 16	71.3°F	69.0°F	67.0°F
Jul 17	71.4°F	69.9°F	67.1°F
Jul 18	71.5°F	69.3°F	67.2°F
Jul 19	71.2°F	68.9°F	67.0°F
Jul 20	71.2°F	66.8°F	66.9°F
Jul 21	71.4°F	68.4°F	67.1°F
Jul 22	72.3°F	66.5°F	68.0°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	70.9°F	2mi
Salem	69.7°F	15mi
Plymouth	69.4°F	32mi
Providence	74.7°F	40mi
Bristol	74.6°F	47mi

* current water temperature in this city

** straight line distance from South Boston