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Okanagan Lake Sea Temperature in September

British Columbia, Canada

August Okanagan Lake year-round → October

Average sea temperature for Okanagan Lake, Canada across September, based on 10 years of daily readings.

Average

14.1° C

High

18.24° C

Low

11.54° C

Water at this temperature is cold and will feel very cold initially, but the body will get used to it and longer swims are possible. Experienced swimmers can manage several hours of swimming, however hypothermia is still a real risk.

September is the 3rd warmest of 12 months at Okanagan Lake. On average the water sits 3.1° than the year-round mean of 11.03° C.

Compared to August, September is 1.7° cooler than (15.83° C in August). By October the water is usually 11.16° C.

Okanagan Lake Day-by-Day Water Temperature in September

10-year low, average and high

10.5° C
12.8° C
15.0° C
17.3° C
19.5° C
1
5
10
15
20
25
30
Day-by-day low and high band with the 10-year daily average through September. Range Average

Each vertical bar above is one day of September. The shaded band covers the range the water has reached on that day across the last 10 years — the lowest reading at the bottom, the highest at the top. The line running through the bars is the daily average over those 10 years, so you can see the typical shape of the month at Okanagan Lake.

A narrow band means the temperature on that day has stayed close to the average year on year. A taller band means it has swung more, often because of changeable weather around that time of year. Hovering a day pulls up its low, average, and high.

September Water Temperature Table for Okanagan Lake

10-year daily averages

Day Average Low High
September 1 15.45° C 13.86° C 17.47° C
September 2 15.54° C 13.9° C 18.24° C
September 3 15.42° C 13.75° C 17.84° C
September 4 15.25° C 13.69° C 17.05° C
September 5 15.31° C 13.75° C 16.77° C
September 6 15.26° C 13.63° C 16.97° C
September 7 15.15° C 13.76° C 16.71° C
September 8 14.92° C 13.86° C 16.02° C
September 9 14.91° C 13.99° C 16.03° C
September 10 14.85° C 13.58° C 16.2° C
September 11 14.75° C 13.11° C 16.2° C
September 12 14.52° C 12.8° C 15.8° C
September 13 14.32° C 12.55° C 15.41° C
September 14 14.13° C 12.48° C 15.02° C
September 15 13.93° C 12.38° C 14.99° C
September 16 13.76° C 12.37° C 14.74° C
September 17 13.57° C 12.57° C 14.13° C
September 18 13.48° C 13° C 13.93° C
September 19 13.46° C 12.9° C 13.87° C
September 20 13.41° C 12.8° C 13.89° C
September 21 13.36° C 12.77° C 14.09° C
September 22 13.38° C 12.77° C 13.93° C
September 23 13.38° C 12.8° C 14.04° C
September 24 13.32° C 12.67° C 14.23° C
September 25 13.33° C 12.28° C 14.24° C
September 26 13.26° C 12.13° C 14.35° C
September 27 13.19° C 12.17° C 14.77° C
September 28 13.07° C 11.93° C 15.06° C
September 29 12.87° C 11.73° C 14.83° C
September 30 12.53° C 11.54° C 13.94° C

Where September Sits in the Year

September highlighted

4.0° C
8.4° C
12.8° C
17.1° C
21.5° C
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
7.61° C
7.45° C
8.01° C
9.57° C
11.97° C
13.58° C
15.58° C
15.83° C
14.1° C
11.16° C
9.31° C
8.24° C
10-year monthly history for Okanagan Lake. Bars span historical low to high; the line marks the monthly average. Range Average
January → February → March → April → May → June → July → August → September → October → November → December →

Nearby Locations in September

Compare other Canada water for the same month

Okanagan Lake Location

49.8338, -119.5236

49.83385, -119.52361 View on OpenStreetMap →

Okanagan Lake sits at 49.8338°N, 119.5236°W, on the coast of British Columbia, Canada. The marker on the map shows the spot the readings on this page come from. It usually sits a short distance from the town centre, out on the open water itself, so the numbers stay tied to the coast rather than a generic point inland.

Coastlines bend, headlands focus the water, and the temperature can run noticeably differently between two beaches that look close together on a map. Comparing nearby locations is a quick way to see how local geography is shaping the readings.

Nearest locations to Okanagan Lake