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 10.63°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.

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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.

51.1

°F

July 19, 05:44

Trend:

stable

Yesterday:

51.2°F

Tomorrow:

51.6°F

Sunrise:

05:23

Sunset:

20:51

Day Length:

15 h. 28 min.

St. John's in July

Minimum:

32.4°F

Average:

34.7°F

Maximum:

36.7°F

Sea water temperature in St. John's today

As of now, in St. John's, the water temperature is 51.1°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 rise a bit.

Recent sea temperature and forecast

The water temperature today is above average for the last two weeks, showing a small increase in temperature. 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 56.0°F on 2024, while the historical minimum was 47.3°F on 2018.

latest data

last year

Over the past two weeks, the water temperature has closely aligned with historical averages for those days. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 52.5°F, with minimum temperature starting at 51.6°F, while the maximum might reach 53.5°F.

Daily water temperature in St. John's

Date	Current Year actual* / forecast**	last year	10 years average
Jul 5	48.6°F	50.6°F	48.7°F
Jul 6	48.4°F	49.2°F	48.9°F
Jul 7	49.8°F	48.9°F	49.3°F
Jul 8	50.0°F	49.6°F	49.2°F
Jul 9	50.1°F	50.4°F	49.7°F
Jul 10	49.5°F	49.1°F	49.8°F
Jul 11	51.0°F	51.5°F	50.3°F
Jul 12	51.5°F	50.2°F	50.3°F
Jul 13	51.2°F	50.3°F	50.8°F
Jul 14	51.3°F	52.8°F	50.6°F
Jul 15	51.8°F	54.4°F	50.9°F
Jul 16	51.3°F	54.3°F	51.4°F
Jul 17	51.7°F	54.9°F	51.9°F
Jul 18	51.2°F	56.1°F	52.2°F
Jul 19	51.1°F	55.8°F	52.8°F
Jul 20	51.6°F	57.7°F	53.3°F
Jul 21	51.9°F	57.8°F	53.6°F
Jul 22	52.1°F	57.3°F	53.7°F
Jul 23	52.5°F	56.5°F	54.2°F
Jul 24	52.7°F	56.7°F	54.3°F
Jul 25	53.3°F	55.5°F	54.9°F
Jul 26	53.5°F	55.4°F	55.1°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.