All data are in degrees Fahrenheit

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Water temperature in Plymouth

Detailed information about the current water temperature in Plymouth. 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 Plymouth now

69.0

°F

August 8, 05:31

Trend:

stable

Yesterday:

69.2°F

Tomorrow:

69.2°F

Sunrise:

05:43

Sunset:

19:53

Day Length:

14 h. 10 min.

Plymouth in August

Minimum:

38.9°F

Average:

41.2°F

Maximum:

43.7°F

Sea water temperature in Plymouth today

As of now, in Plymouth, the water temperature is 69.0°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 about the same as 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 rise a bit.

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 also aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 71.5°F on 2022, while the historical minimum was 66.2°F on 2017.

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 68.6°F, the minimum temperature may reach 68.1°F, and the maximum might stay at 69.2°F.

Daily water temperature in Plymouth

Date Current Year

actual* / forecast**

last year 10 years average
Jul 25 65.4°F 68.6°F 68.4°F
Jul 26 67.9°F 68.3°F 68.5°F
Jul 27 66.1°F 66.5°F 68.4°F
Jul 28 63.8°F 64.5°F 68.0°F
Jul 29 65.6°F 63.2°F 68.1°F
Jul 30 68.4°F 63.0°F 68.9°F
Jul 31 69.7°F 63.8°F 69.4°F
Aug 1 70.8°F 63.8°F 68.6°F
Aug 2 67.9°F 64.6°F 68.4°F
Aug 3 66.7°F 68.1°F 68.4°F
Aug 4 67.3°F 66.9°F 68.7°F
Aug 5 67.7°F 68.8°F 68.9°F
Aug 6 68.0°F 68.5°F 69.1°F
Aug 7 69.2°F 69.2°F 69.1°F
Aug 8 69.0°F 68.5°F 69.0°F
Aug 9 69.2°F 68.3°F 69.2°F
Aug 10 69.2°F 68.3°F 69.2°F
Aug 11 68.7°F 67.8°F 68.7°F
Aug 12 68.2°F 67.3°F 68.1°F
Aug 13 68.1°F 67.2°F 68.0°F
Aug 14 68.2°F 67.3°F 68.1°F
Aug 15 68.5°F 67.6°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 Plymouth by month

In an average year, Plymouth offers no days when the water temperature is warm enough to swim comfortably.
The warmest water in Plymouth was recorded on July 31, 2020, reaching a 76.3°F. While the coldest temperature occurred on February 22, 2025, dipping to 32.9°F. The average readings by season are 41.3°F in Winter, 44.9°F in Spring, 65.1°F in Summer, and 58.9°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
South Boston 66.9°F 32mi
Boston 66.9°F 34mi
Bristol 72.4°F 36mi
Providence 73.3°F 39mi

* current water temperature in this city

** straight line distance from Plymouth