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 5.95°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.

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.

42.7

°F

December 13, 07:49

Trend:

decreasing

Yesterday:

43.2°F

Tomorrow:

42.4°F

Sunrise:

07:02

Sunset:

16:12

Day Length:

9 h. 10 min.

Plymouth in December

Minimum:

37.2°F

Average:

40.5°F

Maximum:

43.7°F

Sea water temperature in Plymouth today

As of now, in Plymouth, the water temperature is 42.7°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 3.5°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 fall a bit.

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 minimum temperature for this date. The maximum temperature recorded for this date was 48.6°F on 2015, while the historical minimum was 43.8°F on 2019.

latest data

last year

Observations from the last two weeks indicate that the water temperature was in proximity to the lowest 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 41.9°F, the minimum temperature may reach 41.3°F, and the maximum might stay at 42.4°F.

Daily water temperature in Plymouth

Date	Current Year actual* / forecast**	last year	10 years average
Nov 29	46.0°F	47.5°F	48.4°F
Nov 30	44.3°F	48.1°F	48.3°F
Dec 1	45.0°F	47.2°F	48.2°F
Dec 2	45.8°F	47.2°F	48.2°F
Dec 3	46.2°F	47.1°F	48.2°F
Dec 4	45.5°F	47.0°F	47.9°F
Dec 5	45.3°F	47.0°F	47.5°F
Dec 6	46.3°F	46.5°F	47.5°F
Dec 7	45.9°F	46.5°F	47.3°F
Dec 8	44.5°F	45.9°F	46.7°F
Dec 9	44.6°F	46.1°F	46.7°F
Dec 10	44.6°F	46.0°F	46.5°F
Dec 11	44.8°F	45.8°F	46.1°F
Dec 12	43.2°F	45.6°F	45.9°F
Dec 13	42.7°F	45.2°F	46.2°F
Dec 14	42.4°F	45.0°F	45.8°F
Dec 15	42.1°F	44.9°F	45.6°F
Dec 16	42.0°F	44.9°F	45.4°F
Dec 17	41.7°F	44.5°F	45.2°F
Dec 18	41.8°F	44.6°F	45.3°F
Dec 19	41.8°F	44.1°F	45.3°F
Dec 20	41.3°F	44.3°F	44.8°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 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 58.8°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
South Boston	43.3°F	32mi
Boston	43.3°F	34mi
Bristol	39.1°F	36mi
Providence	41.1°F	39mi

* current water temperature in this city

** straight line distance from Plymouth