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 4.13°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.

39.4

°F

June 12, 19:05

Trend:

stable

Yesterday:

39.4°F

Tomorrow:

39.4°F

Sunrise:

05:03

Sunset:

20:58

Day Length:

15 h. 55 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 39.4°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 1.6°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 notably higher than the average recorded over the past two weeks, indicating a significant warming 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 44.2°F on 2025, while the historical minimum was 37.2°F on 2017.

latest data

last year

Observations from the last two weeks indicate that the water temperature was in proximity to the lowest values recorded on those days in the past. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 40.5°F, with minimum temperature starting at 39.4°F, while the maximum might reach 41.5°F.

Daily water temperature in St. John's

Date	Current Year actual* / forecast**	last year	10 years average
May 29	36.8°F	37.0°F	37.8°F
May 30	37.0°F	38.1°F	38.2°F
May 31	36.7°F	38.6°F	38.5°F
Jun 1	36.4°F	38.0°F	38.8°F
Jun 2	36.9°F	39.6°F	39.3°F
Jun 3	37.0°F	39.9°F	39.5°F
Jun 4	37.0°F	39.9°F	39.3°F
Jun 5	37.2°F	43.2°F	40.0°F
Jun 6	38.4°F	43.1°F	40.2°F
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	41.0°F
Jun 13	39.4°F	43.1°F	41.0°F
Jun 14	40.1°F	44.2°F	41.7°F
Jun 15	40.2°F	44.2°F	41.8°F
Jun 16	40.6°F	44.1°F	42.2°F
Jun 17	40.9°F	45.4°F	42.5°F
Jun 18	41.0°F	45.4°F	42.6°F
Jun 19	41.5°F	45.2°F	43.1°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.