What is the current water temperature in St. John's?

Q: What is the current water temperature in St. John's?

As of now, in St. John's, the water temperature is 2.4°C. 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.

Canada > St. John's

Water temperature in St. John's

Detailed information about the current water temperature in St. John's. 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.

36.3

°F

December 21, 21:38

Trend:

stable

Yesterday:

36.0°F

Tomorrow:

36.0°F

Sunrise:

07:46

Sunset:

16:12

Day Length:

8 h. 26 min.

St. John's in December

Minimum:

32.0°F

Average:

34.0°F

Maximum:

35.3°F

Sea water temperature in St. John's today

As of now, in St. John's, the water temperature is 36.3°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 0.7°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 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 also aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 39.2°F on 2024, while the historical minimum was 35.1°F on 2015.

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 35.8°F, the minimum temperature may reach 35.5°F, and the maximum might stay at 36.0°F.

Daily water temperature in St. John's

Date	Current Year actual* / forecast**	last year	10 years average
Dec 7	39.4°F	41.3°F	39.2°F
Dec 8	38.9°F	41.4°F	39.3°F
Dec 9	38.5°F	40.6°F	38.8°F
Dec 10	38.3°F	40.2°F	38.7°F
Dec 11	37.9°F	40.2°F	38.6°F
Dec 12	37.7°F	39.7°F	38.2°F
Dec 13	37.5°F	40.9°F	38.2°F
Dec 14	37.7°F	40.5°F	38.0°F
Dec 15	37.5°F	39.8°F	38.0°F
Dec 16	37.3°F	40.3°F	37.9°F
Dec 17	36.5°F	40.0°F	37.6°F
Dec 18	36.2°F	39.6°F	37.3°F
Dec 19	36.4°F	39.5°F	37.1°F
Dec 20	36.0°F	39.2°F	37.0°F
Dec 21	36.3°F	39.2°F	37.0°F
Dec 22	36.0°F	37.8°F	36.7°F
Dec 23	36.0°F	38.6°F	36.7°F
Dec 24	35.9°F	37.9°F	36.6°F
Dec 25	36.0°F	37.6°F	36.7°F
Dec 26	35.8°F	37.4°F	36.5°F
Dec 27	35.6°F	37.3°F	36.3°F
Dec 28	35.5°F	36.3°F	36.2°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 St. John's by month

In an average year, St. John's offers no days when the water temperature is warm enough to swim comfortably.

The warmest water in St. John's was recorded on August 28, 2022, reaching a 64.9°F. While the coldest temperature occurred on January 11, 2016, dipping to 32.0°F. The average readings by season are 34.7°F in Winter, 33.9°F in Spring, 51.0°F in Summer, and 49.9°F in Autumn.