Water temperature in Colpoy's Bay (ON) in September

Is it warm enough to swim in Colpoy's Bay in September? Average water temperature in Colpoy's Bay in September is 18.9°C and therefore is not suitable for comfortable swimming. The warmest water in Colpoy's Bay in September is 22.1°C, and the coldest is 14.7°C. To find out the sea temperature today and in the coming days, go to Current sea temperature in Colpoy's Bay

Changes water temperature in Colpoy's Bay in September 2025, 2024

To get an accurate forecast for the water temperature in Colpoy's Bay for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Colpoy's Bay, the selected years in the table also show the values of the maximum and minimum temperatures on each of the days of September.

Sea temperature

Tides

Weather forecast

You can choose any other years:

Day	2025	2024	Min	Max
1 September	19.7°C	21.1°C	18.3°C	22.1°C
2 September	20.1°C	20.7°C	18.2°C	21.7°C
3 September	20°C	20.2°C	18.2°C	21.4°C
4 September	19.8°C	19.9°C	18°C	21.4°C
5 September	19.5°C	20.1°C	17.8°C	22°C
6 September		20.1°C	17.8°C	21.5°C
7 September		20°C	18.7°C	21.5°C
8 September		19.5°C	18.8°C	20.8°C
9 September		19.2°C	18.6°C	19.2°C
10 September		18.8°C	18.7°C	20.9°C
11 September		18.9°C	18.9°C	20.2°C
12 September		19°C	17.1°C	20.9°C
13 September		19.3°C	16.5°C	20.2°C
14 September		19.5°C	16.5°C	20.5°C
15 September		19.7°C	16.3°C	19.9°C

Day	2024	Min	Max
16 September	20°C	16.2°C	20.3°C
17 September	20.1°C	16.2°C	20.5°C
18 September	19.9°C	16°C	20.4°C
19 September	20°C	16.6°C	20.4°C
20 September	20.1°C	16.6°C	20.4°C
21 September	20.5°C	15.3°C	20.5°C
22 September	20.2°C	16°C	20.2°C
23 September	19.9°C	14.8°C	19.9°C
24 September	19.7°C	15.2°C	19.7°C
25 September	19.4°C	15.4°C	19.9°C
26 September	18.9°C	16.8°C	18.9°C
27 September	18.8°C	16.1°C	20.1°C
28 September	19°C	16.1°C	19.1°C
29 September	18.9°C	16.5°C	18.9°C
30 September	18.7°C	15.5°C	18.7°C

Colpoy's Bay water temp chart in September

Average water temperature in Colpoy's Bay in September over a decade

2015	2016	2017	2018	2019
19.6°C	20.3°C	18.5°C	19.4°C	17.7°C

2020	2021	2022	2023	2024
17.9°C	19.7°C	19.9°C	18.9°C	19.7°C

Colpoy's Bay sea state in September

Chart comparing the height of waves in Colpoy's Bay in September over the past years. The red line indicates the height of the waves when swimming in the sea is prohibited. To view the current sea conditions, click on the graph.

Waves height in Colpoy's Bay in September

Colpoy's Bay water temperature during other months:

You can also view information about water temperature for other months by clicking on the month button below

Temperature in neighboring cities

The nearest locations with the average water temperature in September. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

	Avr	Min	Max
Balmy Beach	18.9°C	14.6°C	22.2°C
Lion's Head	18.5°C	14.6°C	21.6°C
Thornbury	19.3°C	15.6°C	22.4°C
Dyer's Bay	18.4°C	14.6°C	21.4°C
Port Elgin	19.2°C	15.3°C	22.6°C
Southampton	19.2°C	15.3°C	22.6°C
Collingwood	19.5°C	15.9°C	22.5°C
Wasaga Beach	19.5°C	16°C	22.4°C
Tiny Beach	19.5°C	16°C	22.5°C
Singing Sands	18.3°C	14.8°C	21.2°C

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Our report for Colpoy's Bay is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.

Region

Date (day and month)

Water temperature: min 16°C

Average temperature Maximum temperature