Sea Temperature in St. John's in September

Complete information on the sea temperature range in the Atlantic Ocean in St. John's in September. Historical daily data. Climate details for September. Tips on swimming conditions and beach relaxation in St. John's. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.

Water Temperature Range in St. John's in September

45°F

MINIMUN

54°F

AVERAGE

63°F

MAXIMUM

Historical Data of Water Temperature in September in St. John's

Water Temperature Chart for Atlantic Ocean in St. John's in September

Sea Temperature Table in St. John's in September Over the Past Years

Day	2024	2023	2022	Average
Sep 1	57°C	57°C	57°C	58°C
Sep 2	57°C	57°C	55°C	57°C
Sep 3	55°C	57°C	55°C	57°C
Sep 4	57°C	55°C	55°C	56°C
Sep 5	57°C	55°C	55°C	56°C
Sep 6	57°C	55°C	55°C	57°C
Sep 7	57°C	55°C	55°C	57°C
Sep 8	55°C	54°C	57°C	57°C
Sep 9	55°C	57°C	57°C	58°C
Sep 10	55°C	57°C	57°C	57°C
Sep 11	55°C	54°C	57°C	56°C
Sep 12	55°C	52°C	57°C	55°C
Sep 13	55°C	52°C	55°C	55°C
Sep 14	55°C	52°C	55°C	56°C
Sep 15	55°C	50°C	55°C	55°C
Sep 16	55°C	50°C	55°C	55°C
Sep 17	54°C	50°C	55°C	55°C
Sep 18	54°C	50°C	55°C	55°C
Sep 19	55°C	48°C	55°C	55°C
Sep 20	55°C	48°C	55°C	55°C
Sep 21	52°C	48°C	55°C	54°C
Sep 22	54°C	48°C	54°C	54°C
Sep 23	55°C	46°C	55°C	54°C
Sep 24	54°C	46°C	55°C	53°C
Sep 25	54°C	46°C	54°C	53°C
Sep 26	54°C	45°C	54°C	52°C
Sep 27	54°C	45°C	54°C	52°C
Sep 28	54°C	45°C	54°C	51°C
Sep 29	52°C	45°C	52°C	51°C

St. John's Climate and Swimming Opportunities in September

61°F

Average Day Air Temperature

48°F

Average Night Air Temperature

3 in

Precipitation Amount per Month

16 days

Number of Rainy Days

13 hrs

Daylight
per Day

4 hrs

Sunshine
per Day

11 mph

Average Wind Speed

88%

Average
humidity

St. John's lies within the Newfoundland And Labrador in Canada. The average daytime temperature in St. John's in September is 16°C (61°F), while the nighttime average is 9°C (49°F). There are typically 16 rainy days during the month, with a total precipitation of 78 mm (3.1 inches). The daylight duration in September in St. John's is 13 hours, with an average of 4 hours of sunshine per day. The average wind speed in September is 18 km/h (11 mph), and the humidity level is around 88%.

The water temperature in St. John's in September ranges from 10°C to 14°C (50°F to 57°F). At the beginning of the month, the average temperature is around 14°C (57°F), shifting to 13°C (55°F) by mid-September and reaching 12°C (54°F) in the last ten days. Overall, the average sea temperature in St. John's for September is 13°C (55°F). Ideal conditions for a refreshing swim, though some may still find it a bit cool.

Sea Temperature in September in Nearby Cities

Frequently Asked Questions About Water Temperatures in September in St. John's

What is the sea temperature in St. John's in September?

The water temperature in the Atlantic Ocean in St. John's in September ranges from 10°C to 14°C (50°F to 57°F).

Is it possible to swim in the Atlantic Ocean in St. John's in September?

The average sea temperature in St. John's in September is 13°C (55°F), and the air temperature is 16°C (61°F), so ideal conditions for a refreshing swim, though some may still find it a bit cool.