Jackfish Lake
48.9428° N, 93.5966° W
Depth contours from the 1970 government survey. Not for navigation.
Download the depth map (SVG)Jackfish Lake, Ontario. 48.9428° N, 93.5966° W
Maximum depth 18.3 m (1970 survey). Scale bar on the map.
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/on/jackfish-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.
- Bathymetry lines and survey index, 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).
- Guide to Eating Ontario Fish: Advisory Database, Ontario Ministry of the Environment, Conservation and Parks. Contains information licensed under the Open Government Licence – Ontario.
Jackfish Lake is 18.3 m deep at its deepest point, deeper than 54% of the 2,688 surveyed lakes in Ontario. It covers 9.07 km² and lies 6 km north of Northwest Bay.
- Maximum depth
- 18.3 msurveyed 1970
- deeper than 54% of the 2,688 surveyed lakes in Ontario
- Area
- 9.07 km²
- larger than 95% of the 18,731 lakes in Ontario
- Shoreline
- 62.1 km
- longer than 96% of the 18,731 lakes in Ontario
- Elevation
- 348 m
Today on the water
-1.2 °C
Observed at Fort Frances, as of 3:00 a.m. CDT
choppy Estimated waves, next 12 hours: up to 0.2 m. Around 10 a.m., wind from the southeast: the southeast shore is sheltered, waves build toward the northwest shore.
| Time | 4 a.m. | 7 a.m. | 10 a.m. | 1 p.m. | 4 p.m. | 7 p.m. | 10 p.m. | 1 a.m. |
|---|---|---|---|---|---|---|---|---|
| Wind km/h | SE 10 | SE 10 | SE 20 | SE 20 | SE 20 | SE 20 | SE 20 | SE 15 |
| Gusts km/h | 40 | 40 | 40 | 40 | ||||
| Waves (est.) m | 0.1 | 0.1 | 0.2 | 0.2 | ||||
| Temp. °C | 2 | 1 | 9 | 14 | 17 | 14 | 14 | 13 |
| Precip. % | 20 | 20 | 20 | 30 | 30 | 30 | 10 | 10 |
Tonight: Clear. Wind west 20 km/h gusting to 40 becoming light this evening. Low plus 1.
Weather: Fort Frances (local forecast), as of 3:03 a.m. CDT
Sun and moon
- Civil dawn
- 6:54 a.m.
- Sunrise
- 7:26 a.m.
- Sunset
- 6:36 p.m.
- Civil dusk
- 7:07 p.m.
- Moonrise
- 6:19 a.m.
- Moonset
- 5:55 p.m.
- Moon
- Waning crescent, 1% lit
Follow this lake by email: a weekly summary of conditions.
Depth
26% of Jackfish Lake is shallower than 3 m, and 31% is deeper than 10 m.
How to read it: the lake’s area is sorted from the shore to the deepest point. Where the curve is flat, large areas share one depth (flats and weed beds); where it drops, depth changes quickly (drop-offs).
The government depth survey from 1970 records a maximum depth of 18.3 m, drawn from 55 depth contours.
- Download the depth map (SVG)Printing this page gives the map on one sheet, with scale and sources.
Not for navigation. Depths are from government surveys and may be outdated.
Follow this lake
Every Friday by email: the Environment Canada forecast and any weather alerts in effect.