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 3.91°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.

39.0

°F

December 22, 02:09

Trend:

decreasing

Yesterday:

39.2°F

Tomorrow:

38.9°F

Sunrise:

07:47

Sunset:

16:13

Day Length:

8 h. 26 min.

St. John's in December

Minimum:

32.0°F

Average:

33.7°F

Maximum:

35.3°F

Sea water temperature in St. John's today

As of now, in St. John's, the water temperature is 39.0°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 2.4°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 37.9°F on 2021, while the historical minimum was 34.9°F on 2015.

latest data

last year

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. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 38.7°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in St. John's

Date	Current Year actual* / forecast**	last year	10 years average
Dec 8	41.4°F	38.7°F	39.2°F
Dec 9	40.6°F	38.7°F	38.7°F
Dec 10	40.2°F	38.5°F	38.5°F
Dec 11	40.2°F	38.8°F	38.4°F
Dec 12	39.7°F	37.8°F	38.1°F
Dec 13	40.9°F	38.1°F	38.2°F
Dec 14	40.5°F	37.8°F	38.1°F
Dec 15	39.8°F	38.0°F	38.2°F
Dec 16	40.3°F	37.5°F	38.1°F
Dec 17	40.0°F	37.5°F	37.8°F
Dec 18	39.6°F	37.2°F	37.5°F
Dec 19	39.5°F	36.7°F	37.3°F
Dec 20	39.2°F	36.6°F	37.1°F
Dec 21	39.2°F	37.9°F	36.8°F
Dec 22	39.0°F	37.4°F	36.6°F
Dec 23	38.9°F	37.0°F	36.5°F
Dec 24	38.9°F	36.7°F	36.5°F
Dec 25	38.9°F	36.4°F	36.5°F
Dec 26	38.7°F	36.2°F	36.3°F
Dec 27	38.8°F	36.2°F	36.4°F
Dec 28	38.6°F	36.0°F	36.2°F
Dec 29	38.2°F	36.3°F	35.8°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 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 3, 2014, dipping to 32.0°F. The average readings by season are 34.6°F in Winter, 33.8°F in Spring, 51.1°F in Summer, and 49.9°F in Autumn.