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 5.1°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.

41.2

°F

June 21, 21:05

Trend:

decreasing

Yesterday:

42.1°F

Tomorrow:

41.0°F

Sunrise:

05:03

Sunset:

21:02

Day Length:

15 h. 59 min.

St. John's in June

Minimum:

33.2°F

Average:

35.0°F

Maximum:

36.6°F

Sea water temperature in St. John's today

As of now, in St. John's, the water temperature is 41.2°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 3.2°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 fall 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 minimum temperature for this date. The maximum temperature recorded for this date was 50.8°F on 2024, while the historical minimum was 39.4°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 42.2°F, with minimum temperature starting at 41.0°F, while the maximum might reach 43.3°F.

Daily water temperature in St. John's

Date	Current Year actual* / forecast**	last year	10 years average
Jun 7	38.5°F	44.1°F	40.0°F
Jun 8	36.5°F	43.5°F	39.8°F
Jun 9	36.9°F	45.4°F	40.3°F
Jun 10	39.0°F	44.6°F	40.6°F
Jun 11	39.4°F	45.1°F	40.5°F
Jun 12	39.4°F	44.2°F	40.9°F
Jun 13	39.3°F	43.1°F	40.9°F
Jun 14	39.5°F	44.2°F	41.5°F
Jun 15	40.2°F	44.2°F	41.7°F
Jun 16	41.6°F	44.1°F	42.1°F
Jun 17	42.7°F	45.4°F	42.5°F
Jun 18	42.6°F	45.4°F	42.6°F
Jun 19	42.9°F	45.2°F	43.1°F
Jun 20	42.1°F	45.4°F	43.5°F
Jun 21	41.2°F	47.5°F	44.4°F
Jun 22	41.0°F	45.7°F	44.3°F
Jun 23	41.5°F	46.4°F	44.8°F
Jun 24	41.9°F	45.2°F	45.1°F
Jun 25	42.1°F	45.4°F	45.4°F
Jun 26	42.7°F	45.3°F	45.9°F
Jun 27	43.0°F	46.3°F	46.3°F
Jun 28	43.3°F	46.6°F	46.5°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, 51.0°F in Summer, and 50.1°F in Autumn.