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

61.8

°F

October 15, 07:39

Trend:

stable

Yesterday:

61.8°F

Tomorrow:

61.7°F

Sunrise:

07:38

Sunset:

18:26

Day Length:

10 h. 48 min.

Plymouth in October

Minimum:

49.8°F

Average:

51.0°F

Maximum:

51.9°F

Sea water temperature in Plymouth today

As of now, in Plymouth, the water temperature is 61.8°F. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it. Today's reading is 2.2°F higher 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

Today's water temperature is considerably lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 61.3°F on 2023, while the historical minimum was 58.5°F on 2025.

Observations from the last two weeks indicate that the water temperature was in proximity to the highest values recorded on those days in the past. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 61.4°F, the minimum temperature may reach 61.2°F, and the maximum might stay at 61.7°F.

Daily water temperature in Plymouth

Date Current Year

actual* / forecast**

last year 10 years average
Oct 1 63.0°F 59.2°F 60.8°F
Oct 2 63.0°F 59.4°F 60.8°F
Oct 3 63.2°F 59.5°F 60.8°F
Oct 4 63.3°F 59.7°F 60.7°F
Oct 5 63.2°F 59.4°F 60.6°F
Oct 6 63.6°F 59.1°F 60.5°F
Oct 7 63.5°F 59.1°F 60.4°F
Oct 8 62.9°F 58.6°F 60.3°F
Oct 9 62.8°F 58.8°F 60.2°F
Oct 10 62.3°F 58.8°F 60.1°F
Oct 11 61.9°F 58.9°F 60.0°F
Oct 12 62.2°F 58.8°F 59.9°F
Oct 13 61.9°F 58.6°F 59.8°F
Oct 14 61.8°F 58.3°F 59.6°F
Oct 15 61.8°F 58.5°F 59.6°F
Oct 16 61.7°F 58.5°F 59.5°F
Oct 17 61.6°F 58.6°F 59.4°F
Oct 18 61.6°F 58.5°F 59.4°F
Oct 19 61.4°F 58.0°F 59.2°F
Oct 20 61.3°F 58.1°F 59.1°F
Oct 21 61.4°F 58.5°F 59.1°F
Oct 22 61.2°F 58.4°F 59.0°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, 51.2°F in Spring, 60.7°F in Summer, and 59.2°F in Autumn.