What is the current water temperature in Plymouth?

Q: What is the current water temperature in Plymouth?

As of now, in Plymouth, the water temperature is 18.06°F. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it.

United States > Plymouth

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.

64.5

°F

September 17, 10:29

Trend:

stable

Yesterday:

62.9°F

Tomorrow:

64.1°F

Sunrise:

06:25

Sunset:

18:49

Day Length:

12 h. 24 min.

Plymouth in September

Minimum:

37.4°F

Average:

40.8°F

Maximum:

43.6°F

Sea water temperature in Plymouth today

As of now, in Plymouth, the water temperature is 64.5°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 0.9°F lower than the average recorded on this particular day in recent years. Since yesterday, there was a noticeable increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to fall a bit.

Recent sea temperature and forecast

Today's water temperature is slightly lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 67.6°F on 2018, while the historical minimum was 64.0°F on 2019.

latest data

last year

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 63.6°F, the minimum temperature may reach 63.1°F, and the maximum might stay at 64.1°F.

Daily water temperature in Plymouth

Date	Current Year actual* / forecast**	last year	10 years average
Sep 3	66.1°F	68.4°F	66.9°F
Sep 4	66.3°F	65.0°F	66.5°F
Sep 5	66.6°F	65.2°F	66.3°F
Sep 6	67.9°F	65.3°F	66.7°F
Sep 7	67.0°F	63.3°F	66.4°F
Sep 8	66.7°F	64.6°F	66.7°F
Sep 9	67.1°F	66.0°F	66.8°F
Sep 10	65.0°F	65.3°F	66.6°F
Sep 11	65.2°F	65.5°F	66.7°F
Sep 12	61.8°F	65.2°F	65.9°F
Sep 13	62.2°F	65.1°F	65.7°F
Sep 14	62.5°F	65.9°F	65.5°F
Sep 15	62.1°F	65.6°F	65.5°F
Sep 16	62.9°F	65.7°F	65.6°F
Sep 17	64.5°F	65.1°F	65.4°F
Sep 18	64.1°F	64.1°F	65.0°F
Sep 19	63.9°F	64.1°F	64.8°F
Sep 20	63.9°F	64.0°F	64.8°F
Sep 21	63.5°F	63.6°F	64.4°F
Sep 22	63.3°F	63.3°F	64.2°F
Sep 23	63.4°F	63.2°F	64.3°F
Sep 24	63.1°F	62.8°F	64.0°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 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	61.4°F	32mi
Boston	61.4°F	34mi
Bristol	69.6°F	36mi
Providence	68.9°F	39mi

* current water temperature in this city

** straight line distance from Plymouth