All data are in degrees Fahrenheit

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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.
Sea temperature in Boston now

86.5

°F

September 19, 16:31

Trend:

increasing

Yesterday:

85.8°F

Tomorrow:

86.5°F

Sunrise:

05:24

Sunset:

17:33

Day Length:

12 h. 9 min.

Boston in September

Minimum:

81.9°F

Average:

83.0°F

Maximum:

84.8°F

Sea water temperature in Boston today

As of now, in Boston, the water temperature is 86.5°F. Swimming in water of this temperature is considered highly warm and would be enjoyable for everyone. At this temperature, you can comfortably engage in water-based activities for extended periods without experiencing discomfort. Today's reading is 0.8°F higher 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 stay about the same.

Recent sea temperature and forecast

Today's water temperature is notably higher than the average recorded over the past two weeks, indicating a significant warming trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 86.5°F on 2022, while the historical minimum was 84.8°F on 2018.

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. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 86.4°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
Sep 5 85.2°F 87.1°F 85.6°F
Sep 6 84.6°F 86.9°F 85.6°F
Sep 7 84.9°F 86.6°F 85.7°F
Sep 8 84.8°F 87.3°F 85.6°F
Sep 9 84.7°F 87.4°F 85.7°F
Sep 10 86.4°F 87.0°F 85.7°F
Sep 11 86.5°F 86.5°F 85.7°F
Sep 12 86.2°F 86.3°F 85.6°F
Sep 13 86.0°F 86.2°F 85.6°F
Sep 14 86.3°F 86.0°F 85.5°F
Sep 15 85.2°F 85.9°F 85.3°F
Sep 16 85.2°F 86.3°F 85.4°F
Sep 17 85.6°F 86.2°F 85.6°F
Sep 18 85.8°F 86.2°F 85.7°F
Sep 19 86.5°F 86.1°F 85.7°F
Sep 20 86.5°F 86.0°F 85.8°F
Sep 21 86.4°F 85.9°F 85.7°F
Sep 22 86.5°F 86.9°F 85.7°F
Sep 23 86.5°F 87.1°F 85.7°F
Sep 24 86.4°F 86.5°F 85.6°F
Sep 25 86.3°F 86.1°F 85.5°F
Sep 26 86.1°F 85.9°F 85.3°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 Boston, the water temperature is comfortable for swimming all year round.
The warmest water in Boston was recorded on October 19, 2024, reaching a 87.6°F. While the coldest temperature occurred on February 10, 2019, dipping to 79.9°F. The average readings by season are 82.9°F in Winter, 84.0°F in Spring, 85.5°F in Summer, and 85.2°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Santa Maria 86.5°F 10mi
Barcelona 85.9°F 20mi
Santiago 85.7°F 43mi
Tarragona 85.7°F 57mi
La Paz 84.3°F 58mi
Davao 84.9°F 75mi

* current water temperature in this city

** straight line distance from Boston