All data are in degrees Fahrenheit


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



July 14, 04:36











Day Length:

16 h. 0 min.

Plymouth in July







Sea water temperature in Plymouth today

As of now, in Plymouth, the water temperature is 60.3°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 0.4°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 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 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 63.2°F on 2018, while the historical minimum was 58.5°F on 2016.

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 suggests a gradual increase. The average temperature is expected to rise up to 61.1°F, with minimum temperature starting at 60.5°F, while the maximum might reach 61.6°F.

Daily water temperature in Plymouth

Date Current Year

actual* / forecast**

last year 10 years average
Jun 30 59.9°F 62.0°F 59.9°F
Jul 1 60.0°F 61.9°F 60.1°F
Jul 2 59.9°F 60.5°F 60.0°F
Jul 3 59.9°F 60.2°F 60.1°F
Jul 4 59.5°F 59.6°F 60.0°F
Jul 5 59.5°F 59.3°F 59.9°F
Jul 6 59.3°F 58.7°F 60.0°F
Jul 7 59.1°F 59.0°F 60.0°F
Jul 8 59.2°F 59.5°F 60.2°F
Jul 9 59.1°F 60.5°F 60.2°F
Jul 10 59.2°F 60.9°F 60.4°F
Jul 11 59.6°F 60.8°F 60.5°F
Jul 12 59.9°F 60.7°F 60.6°F
Jul 13 60.4°F 60.8°F 60.8°F
Jul 14 60.3°F 60.7°F 60.8°F
Jul 15 60.5°F 60.7°F 60.9°F
Jul 16 60.6°F 60.7°F 61.1°F
Jul 17 61.1°F 60.5°F 61.5°F
Jul 18 61.3°F 60.9°F 61.7°F
Jul 19 61.6°F 60.9°F 62.0°F
Jul 20 61.6°F 61.1°F 62.0°F
Jul 21 61.4°F 60.6°F 61.8°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 August 15, 2022, reaching a 66.6°F. While the coldest temperature occurred on March 20, 2018, dipping to 45.6°F. The average readings by season are 50.9°F in Winter, 50.9°F in Spring, 60.3°F in Summer, and 59.1°F in Autumn.