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 1.48°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.

34.7

°F

April 21, 17:04

Trend:

increasing

Yesterday:

33.8°F

Tomorrow:

34.9°F

Sunrise:

06:02

Sunset:

19:58

Day Length:

13 h. 56 min.

St. John's in April

Minimum:

33.9°F

Average:

35.3°F

Maximum:

36.6°F

Sea water temperature in St. John's today

As of now, in St. John's, the water temperature is 34.7°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 1.5°F higher 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 rise a bit.

Recent sea temperature and forecast

Today's water temperature is notably higher than the average recorded over the past two weeks, indicating a significant warming trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 34.8°F on 2025, while the historical minimum was 32.0°F on 2017.

latest data

last year

Over the last two weeks, the water temperature has stayed slightly lower than historical averages for those days. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 35.1°F, with minimum temperature starting at 34.9°F, while the maximum might reach 35.3°F.

Daily water temperature in St. John's

Date	Current Year actual* / forecast**	last year	10 years average
Apr 7	32.3°F	33.0°F	32.6°F
Apr 8	32.3°F	33.9°F	32.8°F
Apr 9	32.0°F	34.4°F	32.7°F
Apr 10	32.5°F	33.7°F	32.8°F
Apr 11	32.4°F	33.7°F	32.9°F
Apr 12	32.5°F	33.5°F	32.8°F
Apr 13	32.3°F	33.6°F	32.7°F
Apr 14	32.3°F	34.0°F	32.7°F
Apr 15	32.4°F	34.6°F	32.9°F
Apr 16	32.0°F	33.2°F	33.0°F
Apr 17	32.5°F	34.0°F	33.2°F
Apr 18	32.5°F	34.5°F	33.2°F
Apr 19	33.1°F	34.8°F	33.2°F
Apr 20	33.8°F	34.8°F	33.3°F
Apr 21	34.7°F	34.8°F	33.2°F
Apr 22	34.9°F	34.6°F	33.4°F
Apr 23	35.2°F	34.5°F	33.7°F
Apr 24	35.3°F	34.4°F	33.8°F
Apr 25	35.2°F	34.5°F	33.7°F
Apr 26	35.1°F	34.4°F	33.6°F
Apr 27	35.1°F	33.7°F	33.6°F
Apr 28	35.2°F	33.6°F	33.7°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.