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 19.6°F. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool.

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.

67.3

°F

August 8, 02:35

Trend:

stable

Yesterday:

67.3°F

Tomorrow:

67.4°F

Sunrise:

05:44

Sunset:

19:55

Day Length:

14 h. 11 min.

Boston in August

Minimum:

39.4°F

Average:

41.3°F

Maximum:

44.1°F

Sea water temperature in Boston today

As of now, in Boston, the water temperature is 67.3°F. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool. Today's reading is 0.8°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 stay about the same.

Recent sea temperature and forecast

The water temperature today is above average for the last two weeks, showing a small increase in temperature. 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 71.3°F on 2022, while the historical minimum was 65.8°F on 2019.

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. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 67.5°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Boston

Date	Current Year actual* / forecast**	last year	10 years average
Jul 25	65.2°F	66.0°F	68.0°F
Jul 26	67.4°F	67.2°F	68.4°F
Jul 27	66.3°F	65.8°F	68.3°F
Jul 28	65.2°F	64.7°F	68.0°F
Jul 29	64.7°F	64.1°F	68.0°F
Jul 30	67.4°F	65.9°F	68.3°F
Jul 31	67.4°F	65.6°F	68.4°F
Aug 1	69.3°F	64.4°F	68.8°F
Aug 2	67.2°F	64.8°F	68.4°F
Aug 3	65.8°F	67.3°F	68.2°F
Aug 4	65.4°F	67.8°F	68.1°F
Aug 5	66.6°F	70.3°F	68.1°F
Aug 6	67.3°F	69.2°F	68.1°F
Aug 7	67.3°F	68.0°F	68.1°F
Aug 8	67.3°F	66.9°F	68.1°F
Aug 9	67.4°F	65.0°F	68.2°F
Aug 10	67.6°F	65.3°F	68.4°F
Aug 11	67.2°F	64.8°F	68.0°F
Aug 12	67.4°F	65.0°F	68.2°F
Aug 13	67.6°F	65.2°F	68.3°F
Aug 14	67.5°F	65.2°F	68.3°F
Aug 15	67.6°F	65.2°F	68.4°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	67.3°F	2mi
Salem	65.9°F	14mi
Plymouth	69.0°F	34mi
Providence	73.1°F	41mi
Bristol	73.1°F	48mi

* current water temperature in this city

** straight line distance from Boston