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 14.7°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.

58.5

°F

August 24, 12:31

Trend:

stable

Yesterday:

58.5°F

Tomorrow:

58.5°F

Sunrise:

06:08

Sunset:

19:57

Day Length:

13 h. 49 min.

St. John's in August

Minimum:

32.6°F

Average:

34.7°F

Maximum:

36.6°F

Sea water temperature in St. John's today

As of now, in St. John's, the water temperature is 58.5°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 1.2°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 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 61.6°F on 2022, while the historical minimum was 56.6°F on 2025.

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. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 58.3°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
Aug 10	53.7°F	56.5°F	57.8°F
Aug 11	55.5°F	56.9°F	58.2°F
Aug 12	58.8°F	59.4°F	58.8°F
Aug 13	56.7°F	60.4°F	58.8°F
Aug 14	55.2°F	60.7°F	58.7°F
Aug 15	56.5°F	59.8°F	58.9°F
Aug 16	56.5°F	60.5°F	59.3°F
Aug 17	56.3°F	59.5°F	59.2°F
Aug 18	56.3°F	59.9°F	59.4°F
Aug 19	56.6°F	59.8°F	59.5°F
Aug 20	56.7°F	59.4°F	59.1°F
Aug 21	56.6°F	58.6°F	59.1°F
Aug 22	57.4°F	58.6°F	59.4°F
Aug 23	58.5°F	57.4°F	59.5°F
Aug 24	58.5°F	56.6°F	59.6°F
Aug 25	58.5°F	57.6°F	59.7°F
Aug 26	58.6°F	57.4°F	59.7°F
Aug 27	58.5°F	56.8°F	59.6°F
Aug 28	58.4°F	56.6°F	59.5°F
Aug 29	58.4°F	56.4°F	59.6°F
Aug 30	58.0°F	56.6°F	59.2°F
Aug 31	57.7°F	55.6°F	58.8°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.