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 12.63°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.

54.7

°F

May 30, 19:32

Trend:

increasing

Yesterday:

54.3°F

Tomorrow:

55.0°F

Sunrise:

05:11

Sunset:

20:13

Day Length:

15 h. 2 min.

Boston in June

Minimum:

38.9°F

Average:

41.8°F

Maximum:

44.2°F

Sea water temperature in Boston today

As of now, in Boston, the water temperature is 54.7°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 2.0°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 rise a bit.

Recent sea temperature and forecast

The water temperature today is above average for the last two weeks, showing a small increase in temperature. It is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 60.3°F on 2023, while the historical minimum was 53.1°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 histoorical minimum and others when it was close to the historical maximum. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 55.4°F, with minimum temperature starting at 55.0°F, while the maximum might reach 55.7°F.

Daily water temperature in Boston

Date	Current Year actual* / forecast**	last year	10 years average
May 16	54.8°F	53.7°F	52.0°F
May 17	54.5°F	54.7°F	52.2°F
May 18	54.3°F	54.6°F	52.6°F
May 19	56.8°F	54.2°F	53.0°F
May 20	56.2°F	55.2°F	53.2°F
May 21	55.1°F	54.4°F	53.3°F
May 22	54.4°F	54.3°F	54.0°F
May 23	54.1°F	55.0°F	54.3°F
May 24	53.9°F	56.8°F	54.3°F
May 25	53.8°F	58.7°F	54.9°F
May 26	53.4°F	59.3°F	55.1°F
May 27	52.5°F	58.3°F	55.2°F
May 28	53.9°F	58.1°F	55.4°F
May 29	54.3°F	59.3°F	56.0°F
May 30	54.7°F	60.3°F	56.8°F
May 31	55.0°F	59.0°F	57.0°F
Jun 1	55.2°F	60.0°F	57.2°F
Jun 2	55.2°F	59.3°F	57.2°F
Jun 3	55.5°F	59.5°F	57.5°F
Jun 4	55.6°F	60.0°F	57.6°F
Jun 5	55.7°F	61.2°F	57.8°F
Jun 6	55.7°F	61.7°F	57.7°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 58.1°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
South Boston	54.7°F	2mi
Salem	53.2°F	14mi
Plymouth	53.7°F	34mi
Providence	57.9°F	41mi
Bristol	57.5°F	48mi

* current water temperature in this city

** straight line distance from Boston