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 11.97°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.

53.5

°F

October 30, 05:27

Trend:

decreasing

Yesterday:

54.1°F

Tomorrow:

52.9°F

Sunrise:

07:15

Sunset:

17:40

Day Length:

10 h. 25 min.

Boston in November

Minimum:

38.4°F

Average:

41.0°F

Maximum:

44.7°F

Sea water temperature in Boston today

As of now, in Boston, the water temperature is 53.5°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 1.5°F lower 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 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 also falls within the range of the average temperature recorded for this date, suggesting a consistent weather trend. The maximum temperature recorded for this date was 58.7°F on 2023, while the historical minimum was 52.0°F on 2019.

latest data

last year

Over the last two weeks, the water temperature has stayed slightly lower than historical averages for those days. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 52.5°F, the minimum temperature may reach 51.7°F, and the maximum might stay at 53.0°F.

Daily water temperature in Boston

Date	Current Year actual* / forecast**	last year	10 years average
Oct 16	58.3°F	59.6°F	58.7°F
Oct 17	58.1°F	56.9°F	58.0°F
Oct 18	55.8°F	55.9°F	57.6°F
Oct 19	56.1°F	56.0°F	57.5°F
Oct 20	55.7°F	55.7°F	57.1°F
Oct 21	56.2°F	55.5°F	56.9°F
Oct 22	56.3°F	57.4°F	57.2°F
Oct 23	55.7°F	58.1°F	57.0°F
Oct 24	55.1°F	57.1°F	56.8°F
Oct 25	54.4°F	56.2°F	56.2°F
Oct 26	54.5°F	56.1°F	56.1°F
Oct 27	55.0°F	54.4°F	55.7°F
Oct 28	54.6°F	55.0°F	56.0°F
Oct 29	54.1°F	54.9°F	55.6°F
Oct 30	53.5°F	54.5°F	55.0°F
Oct 31	52.9°F	54.2°F	54.4°F
Nov 1	53.0°F	54.0°F	54.4°F
Nov 2	53.0°F	54.1°F	54.4°F
Nov 3	52.8°F	53.3°F	54.2°F
Nov 4	52.2°F	53.0°F	53.7°F
Nov 5	51.9°F	52.5°F	53.3°F
Nov 6	51.7°F	52.1°F	53.1°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 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 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**
South Boston	53.5°F	2mi
Salem	53.8°F	14mi
Plymouth	54.5°F	34mi
Providence	56.8°F	41mi
Bristol	56.8°F	48mi

* current water temperature in this city

** straight line distance from Boston