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 1.33°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.

34.4

°F

January 14, 02:39

Trend:

decreasing

Yesterday:

34.5°F

Tomorrow:

34.2°F

Sunrise:

07:45

Sunset:

16:35

Day Length:

8 h. 50 min.

St. John's in January

Minimum:

33.7°F

Average:

35.1°F

Maximum:

36.7°F

Sea water temperature in St. John's today

As of now, in St. John's, the water temperature is 34.4°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 0.4°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 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 also aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 35.0°F on 2025, while the historical minimum was 32.4°F on 2016.

latest data

last year

Over the past two weeks, the water temperature has closely aligned with historical averages for those days. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 34.1°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
Jan 1	35.5°F	35.0°F	35.1°F
Jan 2	35.9°F	35.2°F	35.3°F
Jan 3	35.0°F	36.7°F	35.4°F
Jan 4	35.5°F	36.6°F	35.3°F
Jan 5	35.2°F	36.9°F	35.1°F
Jan 6	35.0°F	36.6°F	35.0°F
Jan 7	34.7°F	36.1°F	34.7°F
Jan 8	34.5°F	36.0°F	34.7°F
Jan 9	34.4°F	36.1°F	34.6°F
Jan 10	34.3°F	35.8°F	34.7°F
Jan 11	34.0°F	35.3°F	34.4°F
Jan 12	34.6°F	35.1°F	34.1°F
Jan 13	34.5°F	35.4°F	34.1°F
Jan 14	34.4°F	35.0°F	34.0°F
Jan 15	34.2°F	35.1°F	33.9°F
Jan 16	34.2°F	34.9°F	33.8°F
Jan 17	34.0°F	34.6°F	33.7°F
Jan 18	34.0°F	34.2°F	33.6°F
Jan 19	34.2°F	34.2°F	33.9°F
Jan 20	34.0°F	34.1°F	33.7°F
Jan 21	34.0°F	34.1°F	33.6°F
Dec 31	36.4°F	35.2°F	35.5°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 34.8°F in Winter, 33.9°F in Spring, 51.1°F in Summer, and 50.1°F in Autumn.