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 2.7°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.

36.9

°F

June 9, 18:26

Trend:

increasing

Yesterday:

36.5°F

Tomorrow:

36.9°F

Sunrise:

05:04

Sunset:

20:57

Day Length:

15 h. 53 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 36.9°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 3.8°F lower 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 stay about the same.

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 is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 45.4°F on 2025, while the historical minimum was 36.3°F on 2018.

latest data

last year

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the minimum recorded over the past years. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 37.5°F, with minimum temperature starting at 36.8°F, while the maximum might reach 38.4°F.

Daily water temperature in St. John's

Date	Current Year actual* / forecast**	last year	10 years average
May 26	37.8°F	38.5°F	38.4°F
May 27	38.4°F	38.3°F	38.4°F
May 28	37.3°F	37.9°F	38.1°F
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	40.7°F
Jun 10	36.9°F	44.6°F	40.7°F
Jun 11	36.8°F	45.1°F	40.6°F
Jun 12	37.2°F	44.2°F	41.0°F
Jun 13	37.2°F	43.1°F	41.0°F
Jun 14	37.9°F	44.2°F	41.7°F
Jun 15	38.0°F	44.2°F	41.8°F
Jun 16	38.4°F	44.1°F	42.2°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.