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 9.03°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.

48.3

°F

October 21, 17:29

Trend:

decreasing

Yesterday:

48.3°F

Tomorrow:

48.1°F

Sunrise:

07:28

Sunset:

18:02

Day Length:

10 h. 34 min.

St. John's in October

Minimum:

32.9°F

Average:

34.7°F

Maximum:

35.8°F

Sea water temperature in St. John's today

As of now, in St. John's, the water temperature is 48.3°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 0.8°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 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 also aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 52.3°F on 2024, while the historical minimum was 47.4°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 48.2°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
Oct 7	51.9°F	51.9°F	52.1°F
Oct 8	51.7°F	52.0°F	51.7°F
Oct 9	51.9°F	53.0°F	51.7°F
Oct 10	51.2°F	52.9°F	51.5°F
Oct 11	51.4°F	51.3°F	51.2°F
Oct 12	51.5°F	51.5°F	51.1°F
Oct 13	50.9°F	50.9°F	50.8°F
Oct 14	50.4°F	51.0°F	50.8°F
Oct 15	50.1°F	50.7°F	50.8°F
Oct 16	49.8°F	49.2°F	50.2°F
Oct 17	49.2°F	48.9°F	50.1°F
Oct 18	48.7°F	48.4°F	49.7°F
Oct 19	48.5°F	47.8°F	49.2°F
Oct 20	48.3°F	45.6°F	49.0°F
Oct 21	48.3°F	48.2°F	49.1°F
Oct 22	48.1°F	48.1°F	49.0°F
Oct 23	48.4°F	47.0°F	49.2°F
Oct 24	48.4°F	48.1°F	49.2°F
Oct 25	48.3°F	47.5°F	49.2°F
Oct 26	48.3°F	48.9°F	49.1°F
Oct 27	48.0°F	48.9°F	48.8°F
Oct 28	47.7°F	48.6°F	48.5°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, 50.9°F in Summer, and 50.1°F in Autumn.