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 15.2°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.

59.4

°F

October 10, 01:25

Trend:

decreasing

Yesterday:

59.5°F

Tomorrow:

58.8°F

Sunrise:

06:51

Sunset:

18:11

Day Length:

11 h. 20 min.

Boston in October

Minimum:

39.2°F

Average:

41.1°F

Maximum:

44.2°F

Sea water temperature in Boston today

As of now, in Boston, the water temperature is 59.4°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 is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 63.2°F on 2023, while the historical minimum was 58.6°F on 2022.

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 minimum recorded over the past years. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 57.8°F, the minimum temperature may reach 56.4°F, and the maximum might stay at 58.8°F.

Daily water temperature in Boston

Date	Current Year actual* / forecast**	last year	10 years average
Sep 26	61.4°F	63.6°F	62.6°F
Sep 27	62.2°F	64.9°F	62.9°F
Sep 28	61.2°F	65.0°F	62.9°F
Sep 29	60.7°F	66.8°F	63.1°F
Sep 30	60.1°F	65.4°F	62.6°F
Oct 1	59.0°F	64.6°F	62.2°F
Oct 2	59.2°F	63.9°F	61.8°F
Oct 3	61.7°F	63.6°F	61.9°F
Oct 4	62.0°F	62.0°F	61.5°F
Oct 5	60.7°F	61.2°F	61.0°F
Oct 6	61.9°F	62.4°F	60.7°F
Oct 7	61.0°F	63.6°F	60.8°F
Oct 8	60.3°F	63.5°F	60.9°F
Oct 9	59.5°F	61.8°F	61.0°F
Oct 10	59.4°F	61.6°F	60.9°F
Oct 11	58.8°F	59.7°F	60.3°F
Oct 12	58.6°F	59.3°F	60.1°F
Oct 13	58.1°F	59.5°F	59.6°F
Oct 14	58.0°F	59.9°F	59.5°F
Oct 15	57.4°F	59.6°F	58.9°F
Oct 16	57.2°F	59.6°F	58.7°F
Oct 17	56.4°F	56.9°F	58.0°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 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	59.4°F	2mi
Salem	57.7°F	14mi
Plymouth	59.3°F	34mi
Providence	62.3°F	41mi
Bristol	62.4°F	48mi

* current water temperature in this city

** straight line distance from Boston