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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

44.1

°F

April 18, 00:51

Trend:

increasing

Yesterday:

43.9°F

Tomorrow:

44.3°F

Sunrise:

05:58

Sunset:

19:27

Day Length:

13 h. 29 min.

Plymouth in April

Minimum:

40.8°F

Average:

42.5°F

Maximum:

45.2°F

Sea water temperature in Plymouth today

As of now, in Plymouth, the water temperature is 44.1°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 0.8°F lower 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 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 47.6°F on 2024, while the historical minimum was 41.7°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. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 44.7°F, with minimum temperature starting at 44.3°F, while the maximum might reach 45.0°F.

Daily water temperature in Plymouth

Date Current Year

actual* / forecast**

 last year 10 years average
Apr 4 41.2°F 41.8°F 41.4°F
Apr 5 41.3°F 41.7°F 41.5°F
Apr 6 43.9°F 41.3°F 41.5°F
Apr 7 43.3°F 41.3°F 42.0°F
Apr 8 43.1°F 41.4°F 42.2°F
Apr 9 42.9°F 41.7°F 42.4°F
Apr 10 42.4°F 42.5°F 42.5°F
Apr 11 42.1°F 42.0°F 42.8°F
Apr 12 41.9°F 42.0°F 42.8°F
Apr 13 42.0°F 44.0°F 43.2°F
Apr 14 42.0°F 44.7°F 43.6°F
Apr 15 41.6°F 44.7°F 43.6°F
Apr 16 43.3°F 43.8°F 43.9°F
Apr 17 43.9°F 45.4°F 44.7°F
Apr 18 44.1°F 47.6°F 44.9°F
Apr 19 44.3°F 47.0°F 45.1°F
Apr 20 44.5°F 46.6°F 45.3°F
Apr 21 44.6°F 46.4°F 45.4°F
Apr 22 44.8°F 47.3°F 45.6°F
Apr 23 45.0°F 46.4°F 45.8°F
Apr 24 45.0°F 46.6°F 45.8°F
Apr 25 44.9°F 47.8°F 45.7°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

January

February

March

April

May

June

July

August

September

October

November

December

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 43.7°F 32mi
Boston 43.7°F 34mi
Bristol 44.7°F 36mi
Providence 45.5°F 39mi

* current water temperature in this city

** straight line distance from Plymouth