What is the current water temperature in Boston?

Q: What is the current water temperature in Boston?

As of now, in Boston, the water temperature is 9.6°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.

United States > Boston

Water temperature in Boston

Detailed information about the current water temperature in 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.

49.3

°F

May 3, 10:36

Trend:

stable

Yesterday:

49.7°F

Tomorrow:

49.5°F

Sunrise:

05:36

Sunset:

19:47

Day Length:

14 h. 11 min.

Boston in May

Minimum:

40.6°F

Average:

42.2°F

Maximum:

44.6°F

Sea water temperature in Boston today

As of now, in Boston, the water temperature is 49.3°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 1.5°F higher than 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 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 50.7°F on 2023, while the historical minimum was 44.7°F on 2014.

latest data

last year

Over the last two weeks, the water temperature has stayed slightly above than historical averages for those days. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 50.5°F, with minimum temperature starting at 49.5°F, while the maximum might reach 51.4°F.

Daily water temperature in Boston

Date	Current Year actual* / forecast**	last year	10 years average
Apr 19	47.0°F	49.0°F	45.2°F
Apr 20	46.8°F	48.3°F	45.3°F
Apr 21	47.4°F	48.8°F	45.6°F
Apr 22	46.7°F	49.0°F	45.7°F
Apr 23	47.0°F	48.6°F	45.9°F
Apr 24	46.6°F	48.0°F	45.8°F
Apr 25	46.7°F	47.3°F	45.7°F
Apr 26	46.2°F	47.1°F	45.8°F
Apr 27	46.3°F	49.5°F	46.2°F
Apr 28	45.8°F	50.1°F	46.4°F
Apr 29	45.9°F	49.4°F	46.5°F
Apr 30	47.7°F	49.2°F	46.6°F
May 1	47.5°F	48.9°F	46.7°F
May 2	49.7°F	50.7°F	47.4°F
May 3	49.3°F	50.7°F	47.7°F
May 4	49.5°F	50.6°F	48.0°F
May 5	50.0°F	50.3°F	48.5°F
May 6	50.0°F	50.9°F	48.4°F
May 7	50.4°F	51.4°F	48.9°F
May 8	51.0°F	53.3°F	49.5°F
May 9	51.4°F	55.6°F	49.8°F
May 10	51.4°F	53.7°F	49.9°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 Boston by month

In an average year, Boston offers no days when the water temperature is warm enough to swim comfortably.

The warmest water in Boston was recorded on July 29, 2020, reaching a 75.0°F. While the coldest temperature occurred on February 22, 2021, dipping to 33.7°F. The average readings by season are 41.3°F in Winter, 44.8°F in Spring, 64.8°F in Summer, and 58.0°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
South Boston	49.3°F	2mi
Salem	46.5°F	14mi
Plymouth	47.9°F	34mi
Providence	53.2°F	41mi
Bristol	52.1°F	48mi

* current water temperature in this city

** straight line distance from Boston