South Allely Lake

49.5694° N, 90.3925° W

South Allely Lake, Ontario. 49.5694° N, 90.3925° W

Not for navigation. Depths are from government surveys and may be outdated.

borealbound.ca/lakes/on/south-allely-lake/, compiled October 9, 2026

Canadian Geographical Names Database, Natural Resources Canada. Contains information licensed under the Open Government Licence – Canada.
HydroLAKES v1.0, Messager et al. 2016 / WWF HydroSHEDS. Licensed under CC BY 4.0.
Census boundaries and population, 2021, Statistics Canada. Adapted from Statistics Canada. This does not constitute an endorsement by Statistics Canada.
Fisheries Management Zones, Ontario Ministry of Natural Resources. Contains information licensed under the Open Government Licence – Ontario.
City page weather forecasts and alerts, Environment and Climate Change Canada. Contains data from Environment and Climate Change Canada (ECCC Data Servers End-use Licence).

South Allely Lake covers 2.36 km², Ontario. It lies 76 km south of Allanwater Bridge.

Today on the water

6.6 °C

Wind SW 8 km/h

Observed at Upsala, as of 10:00 a.m. CDT

Hourly forecast, next 24 hours
Time	11 a.m.	2 p.m.	5 p.m.	8 p.m.	11 p.m.	2 a.m.	5 a.m.	8 a.m.
Wind km/h	var. 5	SE 10	SE 10	SE 20	SE 20	SE 20	SE 20	SE 20
Gusts km/h				40	40	40	40	40
Temp. °C	9	13	13	11	8	8	9	11
Precip. %	0	0	0	0	0	0	0	0

Today: Clear. Becoming a mix of sun and cloud this morning. Wind up to 15 km/h. High 14. Wind chill minus 5 this morning. UV index 3 or moderate.

Weather: Upsala (local forecast), as of 10:03 a.m. CDT