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783-acre lake near Québec. The lake tops out around 79 ft. The depth chart is built from real state fisheries GPS surveys, so the humps, channels and drop-offs you see are measured, not guessed. Below is the species-by-species picture, pulled from the same data the map uses.
The drawn water covers 783 acres wrapped in 10.4 miles of bank. That shoreline is heavily fingered (development index 2.7) — bays, points and pockets everywhere, which multiplies the fishable edge. About 64% of the surface sits shallower than 15 ft — that's the weed-and-bait zone. The basin spans about 4.3 mi end to end and 1.1 mi across at its widest. It sits in Le Saguenay-et-son-Fjord. Its nearest charted neighbour, Lac Labrecque, is 15 mi to the west.
Carte de pêche interactive gratuite — Lac Sébastien, Québec : courbes de profondeur issues de relevés bathymétriques réels jusqu'à 24 m (79 pi), et les meilleurs sites pour omble de fontaine, touladi, ouananiche et plus. Les profondeurs proviennent de la Géobase des bathymétries de lac du Québec (MELCCFP) lorsque disponibles.
Early season brook trout use the shallows, holding in 2 to 15 ft. Expect a summer slide to 10 to 30 ft, then a winter hold in 3 to 20 ft. Put Main-lake point first on the milk run — a point near 8 ft that grades prime for spring. In summer the feeding windows fall in early morning and the evening. Tie on a small spoon fished deep or a trolled lake-clear wobbler + worm and you're in the game.
| Saison | Profondeur | Meilleure fenêtre | Commencer à | Leurres |
|---|---|---|---|---|
| Printemps | 2 to 15 ft | dawn & dusk | Main-lake point (8 ft) | Small inline spinner (gold), Tiny spoon |
| Été | 10 to 30 ft | dawn & dusk | Break off the point (7 ft) | Small spoon fished deep, Trolled lake-clear wobbler + worm |
| Automne | 2 to 15 ft | midday & dawn | Main-lake point (8 ft) | Small spoon (orange), Spinner |
| Hiver | 3 to 20 ft | dawn | Break off the point (7 ft) | Small jigging spoon, Tungsten jig + plastic |
When the water first warms, lake trout slide up into 10 to 40 ft. By summer they slide out to 24 to 79 ft, and by winter most fish are in 20 to 79 ft. If you only fish one area, make it Deep basin: a deep basin around 65 ft that scores prime in summer. In summer the feeding windows fall in early morning. Keep a white tube jig (deep) or a magnum spoon on downrigger rigged through the warm months.
| Saison | Profondeur | Meilleure fenêtre | Commencer à | Leurres |
|---|---|---|---|---|
| Printemps | 10 to 40 ft | dawn & dusk | Main-lake point (8 ft) | Casting spoon over shoals, Jerkbait (shallow) |
| Été | 24 to 79 ft | dawn | Deep basin (65 ft) | White tube jig (deep), Magnum spoon on downrigger |
| Automne | 10 to 50 ft | dusk & dawn | Main-lake point (8 ft) | Heavy casting spoon, Jigging rap over reefs |
| Hiver | 20 to 79 ft | dawn | Deep basin (65 ft) | White tube jig, Airplane jig |
Spring landlocked salmon on Lac Sébastien hold shallow, usually 1 to 15 ft. By summer they slide out to 25 to 60 ft, and by winter most fish are in 10 to 40 ft. The chart's best answer is Deep basin — deep basin, 65 ft, prime for summer. Prime time lands in early morning and the evening. The summer box starts with a dodger + streamer down deep or a thin spoon on lead core.
| Saison | Profondeur | Meilleure fenêtre | Commencer à | Leurres |
|---|---|---|---|---|
| Printemps | 1 to 15 ft | dawn & dusk | Main-lake point (8 ft) | Streamer flies (Grey Ghost) off boards, Thin spoon (Mooselook style) |
| Été | 25 to 60 ft | dawn & dusk | Deep basin (65 ft) | Dodger + streamer down deep, Thin spoon on lead core |
| Automne | 5 to 30 ft | dawn & dusk | Main-lake point (8 ft) | Casting spoon at the mouths, Streamers |
| Hiver | 10 to 40 ft | dawn | Break off the point (7 ft) | Small jigging spoon, Swedish pimple + smelt |
Start shallow in spring: lake whitefish sit in 15 to 45 ft that time of year. Summer pushes them deeper, 24 to 79 ft, and winter fish settle into 25 to 70 ft. The spot to know is Deep basin, a deep basin in about 65 ft of water that rates prime for lake whitefish in summer. Warm-month bites cluster around early morning. Throw a blade bait vertical or a small jigging spoon until the fish tell you otherwise.
| Saison | Profondeur | Meilleure fenêtre | Commencer à | Leurres |
|---|---|---|---|---|
| Printemps | 15 to 45 ft | midday & dawn | Shallow feeding flat (10 ft) | Small jig + waxworm, Blade bait (small) |
| Été | 24 to 79 ft | dawn | Deep basin (65 ft) | Blade bait vertical, Small jigging spoon |
| Automne | 8 to 30 ft | dusk | Break off the point (7 ft) | Small spoon (gold), Jig + plastic larva |
| Hiver | 25 to 70 ft | midday & dawn | Deep basin (65 ft) | Jigging spoon + bead chain, Tungsten jig + waxie |
Start shallow in spring: cisco (lake herring) sit in 10 to 40 ft that time of year. Summer pushes them deeper, 24 to 79 ft, and winter fish settle into 20 to 60 ft. The spot to know is Deep basin, a deep basin in about 65 ft of water that rates prime for cisco (lake herring) in summer. Warm-month bites cluster around early morning. Throw a vertical flutter spoon (small) or a drop-shot micro plastic until the fish tell you otherwise.
| Saison | Profondeur | Meilleure fenêtre | Commencer à | Leurres |
|---|---|---|---|---|
| Printemps | 10 to 40 ft | dawn & dusk | Break off the point (7 ft) | Small silver spoon, Tiny swim jig (white) |
| Été | 24 to 79 ft | dawn | Deep basin (65 ft) | Vertical flutter spoon (small), Drop-shot micro plastic |
| Automne | 5 to 25 ft | dusk & dawn | Break off the point (7 ft) | Small casting spoon, Inline spinner (silver) |
| Hiver | 20 to 60 ft | dawn | Deep basin (65 ft) | Small jigging spoon (glow/silver), Tungsten jig + minnow head |
The spring pattern is a shallow one: yellow perch in 3 to 12 ft. Midsummer fish sit out in 10 to 30 ft before dropping to 15 to 35 ft for winter. The spot to know is Shallow bay flat, a weed flat in about 4 ft of water that rates prime for yellow perch in spring. Plan around early morning in the warm months. Summer baits: a drop-shot micro plastics or a small spoon tipped with worm gets it done.
| Saison | Profondeur | Meilleure fenêtre | Commencer à | Leurres |
|---|---|---|---|---|
| Printemps | 3 to 12 ft | midday & dawn | Shallow bay flat (4 ft) | Small jig + curly tail, Perch-pattern micro crank |
| Été | 10 to 30 ft | dawn | Break off the point (7 ft) | Drop-shot micro plastics, Small spoon tipped with worm |
| Automne | 12 to 35 ft | midday | Break off the point (7 ft) | Jigging spoon (small), Perch rig / spreader |
| Hiver | 15 to 35 ft | midday & dawn | Deep basin (65 ft) | Tungsten jig + spikes, Rattle spoon (small) |
Lac Sébastien also holds northern pike (8 to 20 ft in summer), burbot (24 to 79 ft in summer). Pick any of them on the map above for rated spots and bait picks.
Lac Sébastien carries 7 mapped structure features, topping out (or rather bottoming out) at Deep basin, about 65 ft down.
Season dates, license requirements, and size and bag limits for Québec waters are set by the Québec sport fishing rules (MELCCFP) — and special regulations can apply to Lac Sébastien specifically, so confirm the current rules before you fish.
Check the official Québec fishing regulations →
Lac Sébastien is about 79 ft (24 m) deep at its deepest point. The depth chart here comes from real state fisheries GPS surveys, so the contours reflect measured depths.
Lac Sébastien atteint environ 24 m (79 pi) à son point le plus profond. Les profondeurs proviennent de relevés bathymétriques réels.
Anglers target brook trout, lake trout, landlocked salmon, lake whitefish, cisco (lake herring), yellow perch, northern pike, burbot on Lac Sébastien. This species list is an informed estimate from Québec's provincial fish-range maps (bounded by each lake's depth and habitat), not a per-lake fish survey — Québec doesn't publish per-lake species records.
Deep basin is the top-rated area: a deep basin in about 65 ft of water that rates prime for lake trout in summer. Open the map above to see every rated spot for each species and season.
For brook trout, the summer bite is best in early morning and the evening. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.
Fishing on Lac Sébastien is regulated by the Québec sport fishing rules (MELCCFP). Check the official Québec regulations for current license requirements, season dates, and size and bag limits — special regulations can apply to this specific water.
Lac Labrecque 15 mi · Lac Roger 20 mi · Lac Laurent 22 mi · Lac de l'Aqueduc de Saint-Bruno 24 mi · Lac Kénogami 25 mi · Lac des Îlets 31 mi · Lac Ayette 34 mi · Lac Richelieu 35 mi · Lac du Quai 36 mi · Lac Laurier 37 mi · Lac aux Grandes Pointes 37 mi · Lac Nixon 37 mi
See how Lac Sébastien stacks up: best northern pike lakes in Québec · best yellow perch lakes in Québec · best lake trout lakes in Québec · best brook trout lakes in Québec
More water nearby: Le Saguenay-et-son-Fjord fishing maps (21 charts). Browse all Québec fishing maps or see every water on DepthScout. Bathymetry credit: state fisheries survey programs. How we build these maps. Fish here with a sonar unit that logs? Send us your depth data and we'll improve this chart, credited to you. For fishing guidance only, never navigation.