Water temperature in Lake Saint-Jean

This data the coastal Lake Saint-Jean water temperature today, tomorrow and the upcoming days. Besides, you can also get information about the weather and surf forecast, as well as the data on sunrise / sunset and moonrise / moonset at a given point on any given day.

Current water temperature in Lake Saint-Jean

Water temperature in Lake Saint-Jean today is 13.4°C. Based on our historical data over a period of ten years, the warmest water in this day in Lake Saint-Jean was recorded in 2023 and was 15.6°C, and the coldest was recorded in 2020 at 11.8°C. Water temperature in Lake Saint-Jean is expected to drop to 11.2°C in the next 10 days. October average water temperature in Lake Saint-Jean is 12.7°C, the minimum temperature is 8.4°C, and the maximum is 17.5°C.

The swimming season in Lake Saint-Jean lasts from July to August. During those months, Lake Saint-Jean water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in Lake Saint-Jean in winter reaches 1.8°C, in spring 2.8°C, in summer the average temperature rises to 18.5°C, and in autumn it is 12.6°C.

Lake Saint-Jean water temperature now

Current temperature and weather

Data in a table show Lake Saint-Jean temperature today (13 October 2025). For more information and forecast for a few days, go to the weather forecast Lake Saint-Jean.

0-3 h	3-6 h	6-9 h	9-12 h
5.8°C	4.4°C	3.4°C	4.1°C

12-15 h	15-18 h	18-21 h	21-24 h
9.4°C	11.6°C	9.8°C	8.1°C

Lake Saint-Jean water temperature by month

These figures shows the average, minimum and maximum monthly water temperature in Lake Saint-Jean. In addition to the table values, the graph below displays of changes average surface temperature during the year. Values are calculated based on the data over the past 10 years. Using them, you can check the water temperature in Lake Saint-Jean on any day of this period that interests you. Click on the month link and you will see a table for each day, or alternatively you can view the temperature curve of the month and select 2 different years you want to compare, either in a table or as a curve

Chart monthly average water temperature in Lake Saint-Jean

The nearest beaches and cities from Lake Saint-Jean with the water temperature today, as well as the air temperature and the state of the weather during the day and the average wave height for today

	Water	Weather		Wave
Fjord du Saguenay	7.1°C	10°C		0.07 m
Baie Saint Paul	10.1°C	12°C		0.12 m
La Malbaie	6.7°C	9°C		0.12 m
Beaupre	15.3°C	14°C		0.12 m
Chateau Richer	15.6°C	14°C		0.12 m
Kamouraska	6.9°C	12°C		0.12 m
Riviere-du-Loup	7.2°C	9°C		0.07 m
Les Escoumins	4°C	12°C		0.06 m
Berthier sur Mer	15.9°C	13°C		0.12 m
Rimouski	6.1°C	11°C		0.12 m

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Lac Saint-Jean

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Our report for Lake Saint-Jean 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.