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 16.88°F. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it.

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.

62.4

°F

September 16, 21:23

Trend:

stable

Yesterday:

62.1°F

Tomorrow:

62.0°F

Sunrise:

06:25

Sunset:

18:53

Day Length:

12 h. 28 min.

Boston in September

Minimum:

38.5°F

Average:

41.2°F

Maximum:

44.1°F

Sea water temperature in Boston today

As of now, in Boston, the water temperature is 62.4°F. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it. Today's reading is 2.9°F lower than the average recorded on this particular day in recent years. Since yesterday, there was a slight increase in temperature. This indicates a warming trend over the past day. 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 67.2°F on 2023, while the historical minimum was 63.6°F on 2017.

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 61.4°F, the minimum temperature may reach 60.8°F, and the maximum might stay at 62.0°F.

Daily water temperature in Boston

Date	Current Year actual* / forecast**	last year	10 years average
Sep 2	64.7°F	67.6°F	67.0°F
Sep 3	65.0°F	67.8°F	66.4°F
Sep 4	65.7°F	65.7°F	66.1°F
Sep 5	64.9°F	65.6°F	66.1°F
Sep 6	64.8°F	65.6°F	66.1°F
Sep 7	66.1°F	64.7°F	66.5°F
Sep 8	65.7°F	64.7°F	66.2°F
Sep 9	63.5°F	65.8°F	66.2°F
Sep 10	61.8°F	64.6°F	66.1°F
Sep 11	61.3°F	64.6°F	65.9°F
Sep 12	60.1°F	63.9°F	65.3°F
Sep 13	61.8°F	64.4°F	65.4°F
Sep 14	60.7°F	64.9°F	65.1°F
Sep 15	62.1°F	65.6°F	65.3°F
Sep 16	62.4°F	64.8°F	65.3°F
Sep 17	62.0°F	64.7°F	65.0°F
Sep 18	61.8°F	64.7°F	64.7°F
Sep 19	61.7°F	65.5°F	64.6°F
Sep 20	61.4°F	65.1°F	64.3°F
Sep 21	60.9°F	64.3°F	63.9°F
Sep 22	60.8°F	63.6°F	63.8°F
Sep 23	60.8°F	63.0°F	63.7°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 11, 2025, dipping to 32.5°F. The average readings by season are 41.1°F in Winter, 45.1°F in Spring, 65.0°F in Summer, and 58.0°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
South Boston	62.4°F	2mi
Salem	62.8°F	14mi
Plymouth	62.9°F	34mi
Providence	69.0°F	41mi
Bristol	69.8°F	48mi

* current water temperature in this city

** straight line distance from Boston