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Upper Johnston Lake

46.2493° N, 78.9703° W

Upper Johnston Lake, Ontario. 46.2493° N, 78.9703° W

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 Depths are from government surveys and may be outdated.

borealbound.ca/lakes/on/upper-johnston-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).
  • Air Quality Health Index observations and forecasts, Environment and Climate Change Canada. Contains data from Environment and Climate Change Canada (ECCC Data Servers End-use Licence).

Upper Johnston Lake covers 0.87 km², Ontario. It lies 21 km southwest of Mattawa.

Area
0.87 km²
Shoreline
9.8 km
Elevation
181 m

Today on the water

4 °C

CloudyWind WNW 8 km/h

Observed at North Bay, as of 5:00 a.m. EDT

Time6 a.m.9 a.m.12 p.m.3 p.m.6 p.m.9 p.m.12 a.m.3 a.m.
Wind km/hW 10NW 20W 20NW 20N 10NE 10E 10E 10
Gusts km/h40
Temp. °C45101312843
Precip. %303020200000

Tonight: Mainly cloudy with 30 percent chance of showers. Wind west 20 km/h gusting to 40 becoming light early this evening. Low plus 4.

Weather: North Bay (local forecast), as of 5:01 a.m. EDT

Sun and moon

Civil dawn
6:54 a.m.
Sunrise
7:25 a.m.
Sunset
6:40 p.m.
Civil dusk
7:10 p.m.
Moonrise
6:16 a.m.
Moonset
5:58 p.m.
Moon
Waning crescent, 1% lit

Air Quality Health Index

1 low risk

North Bay, as of 4:00 a.m. EDT