Water temperature in Sarnia (ON) in June

Is it warm enough to swim in Sarnia in June? Average water temperature in Sarnia in June is 14.8°C and therefore is not suitable for comfortable swimming. The warmest water in Sarnia in June is 20.4°C, and the coldest is 9.2°C. Average high air temperature in Sarnia in June is 24°C, and average low temperature is 13°C. To find out the sea temperature today and in the coming days, go to Current sea temperature in Sarnia

Changes water temperature in Sarnia in June 2025, 2024

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

Sea temperature

Tides

Weather forecast

You can choose any other years:

Day	2025	2024	Min	Max
1 June	10°C	13.5°C	9.2°C	14.2°C
2 June	10.2°C	13.3°C	9.9°C	15.5°C
3 June	10.9°C	13.1°C	10.3°C	15.5°C
4 June	10.8°C	14.9°C	9.9°C	15.2°C
5 June	10.7°C	14.9°C	10.4°C	15.6°C
6 June	11.5°C	16°C	10.3°C	16°C
7 June	11.4°C	15.5°C	10.1°C	15.5°C
8 June	11.8°C	15.1°C	10.8°C	15.1°C
9 June	12.4°C	15.2°C	11.4°C	15.2°C
10 June	12.5°C	14.7°C	11.6°C	17.2°C
11 June	13.8°C	14.3°C	11.3°C	17.7°C
12 June	13.2°C	14.9°C	11.8°C	17.1°C
13 June	13.7°C	15.3°C	11.9°C	17.5°C
14 June	14.2°C	15.3°C	12°C	17.8°C
15 June	14.4°C	15.6°C	11.9°C	17.1°C

Day	2025	2024	Min	Max
16 June	14.7°C	16.5°C	12°C	17°C
17 June	15.4°C	16.6°C	11.7°C	17.4°C
18 June	16.1°C	18°C	11.9°C	18°C
19 June	16°C	18.8°C	11.9°C	18.8°C
20 June	15.1°C	18.9°C	11.9°C	18.9°C
21 June	15.6°C	18.8°C	12.2°C	18.8°C
22 June		19.2°C	11.9°C	19.2°C
23 June	15.9°C	19.1°C	12.1°C	19.3°C
24 June	16.5°C	19.3°C	12.8°C	19.3°C
25 June	17.2°C	18.9°C	14.1°C	19.1°C
26 June	17.8°C	18.5°C	14.6°C	20.2°C
27 June	18°C	17.7°C	15.3°C	20.1°C
28 June	18.3°C	17.5°C	14.1°C	20.4°C
29 June	18.7°C	19.3°C	15.2°C	20.3°C
30 June	19.3°C	17.7°C	15.3°C	20.3°C

Average water temperature in Sarnia in June over a decade

2016	2017	2018	2019	2020
16°C	15.3°C	13.8°C	12.2°C	14.9°C

2021	2022	2023	2024	2025
15.9°C	14.5°C	15.3°C	16.5°C	14.3°C

Sarnia sea state in June

Chart comparing the height of waves in Sarnia in June 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.

Weather and climate in Sarnia in June

This data display average monthly climate indicators in Sarnia in June based on our historical weather readings over a period of ten years. In addition to temperature, we include data on the number of rainy and sunny days so you can have all the information about your destination before your trip

Average HIGH temperature24°C
Average LOW temperature13°C
Average humidity
86
Average rainfall days11 days
Average rainfall3.3''/84mm
Average sunshine8.9h

Sarnia 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 June. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

	Avr	Min	Max
Canatara Beach	14.8°C	9.2°C	20.4°C
Point Edward	14.8°C	9.2°C	20.4°C
Brights Grove	15°C	9.4°C	20.4°C
Lakeport	14.6°C	8.6°C	20.2°C
Fort Gratiot Township	14.5°C	8°C	20.3°C
Highland Glen	15.4°C	9.6°C	20.9°C
Kennedy Acres	15.4°C	9.6°C	20.9°C
Kettle Point	15.5°C	9.8°C	21.3°C
Lexington	14.7°C	8°C	20.6°C
Ipperwash Beach	15.6°C	9.8°C	21.2°C

Sarnia photo gallery

If you have interesting photos of this place, you can upload them here. Photos will be available to all users after verification by the moderator.

Vote for Ontario best beach

Get widget or API for your website

Our report for Sarnia 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