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Fishing Loch Grannoch: what the data says
275-acre lake near Dumfries and Galloway. The lake tops out around 67 ft. Depth here is modeled from the true shoreline and max depth rather than surveyed; use it to plan, not to navigate. What the data behind the map says about each species, season by season:
The drawn water covers 274 acres wrapped in 4.7 miles of bank. A middling shoreline index (2) gives it some bays to work without being a maze. Roughly 49% of the water is 15 ft or less as modeled, the band where the food chain lives.
Brown Trout fishing at Loch Grannoch
The spring pattern is a shallow one: brown trout in 3 to 25 ft. As the season builds they drop to 25 to 60 ft, wintering in 5 to 35 ft. Top water on the chart: Break off the point, a drop-off in the 30-ft range, prime in summer. Time it for after dark and early morning. Summer baits: a spoon at the thermocline or a deep stickbait (night) gets it done.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 25 ft | dawn & dusk | Main-lake point (17 ft) | Stickbait off planer boards (shallow), Small spoon along mud lines |
| Summer | 25 to 60 ft | night & dawn | Break off the point (30 ft) | Spoon at the thermocline, Deep stickbait (night) |
| Fall | 5 to 30 ft | dusk & dawn | Main-lake point (17 ft) | Jerkbait over gravel, Casting spoon |
| Winter | 5 to 35 ft | dawn | Break off the point (30 ft) | Jigging spoon, Small stickbait (slow) |
European Perch fishing at Loch Grannoch
Come spring, look for european perch tight to the bank in 3 to 12 ft. Expect a summer slide to 8 to 28 ft, then a winter hold in 12 to 33 ft. Start at Shallow bay flat. It's a weed flat holding about 6 ft of water and rates prime come spring. Prime time lands in early morning. A drop-shot micro plastics or a small crankbait (perch pattern) is the honest summer answer here.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | midday & dawn | Shallow bay flat (6 ft) | Small jig + curly tail, Inline spinner #1-2 |
| Summer | 8 to 28 ft | dawn | Break off the point (30 ft) | Drop-shot micro plastics, Small crankbait (perch pattern) |
| Fall | 10 to 33 ft | midday | Break off the point (30 ft) | Jigging spoon (small), Drop-shot on deep flats |
| Winter | 12 to 33 ft | midday & dawn | Break off the point (30 ft) | Tungsten jig + maggots, Small balance jig |
Northern Pike fishing at Loch Grannoch
Early season northern pike use the shallows, holding in 2 to 8 ft. Expect a summer slide to 8 to 20 ft, then a winter hold in 5 to 15 ft. Put Shallow bay flat first on the milk run — a weed flat near 6 ft that grades prime for spring. In summer the feeding windows fall in early morning and the evening. Tie on a bucktail or a weedless spoon over cabbage and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | Shallow bay flat (6 ft) | #5 inline spinner, Spoon (red/white) |
| Summer | 8 to 20 ft | dawn & dusk | Shallow bay flat (6 ft) | Bucktail, Weedless spoon over cabbage |
| Fall | 6 to 18 ft | midday & dawn | Shallow bay flat (6 ft) | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 5 to 15 ft | midday | Shallow bay flat (6 ft) | Tip-ups, Large jigging spoon |
Arctic Char fishing at Loch Grannoch
In spring, arctic char run shallow here, mostly 4 to 15 ft. Midsummer fish sit out in 20 to 60 ft before dropping to 10 to 40 ft for winter. Summer arctic char concentrate at Deep basin, a prime-rated deep basin around 57 ft. Fish it in early morning and you'll meet the bite. You won't need more than a jigging spoon vertical or a tube jig (smelt) most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 4 to 15 ft | midday & dawn | open water | Small casting spoon (silver/orange), Jerkbait (small) |
| Summer | 20 to 60 ft | dawn | Deep basin (57 ft) | Jigging spoon vertical, Tube jig (smelt) |
| Fall | 8 to 30 ft | midday & dusk | Break off the point (30 ft) | Casting spoon (orange/gold), Beadhead streamer |
| Winter | 10 to 40 ft | midday & dawn | Break off the point (30 ft) | Jigging spoon (glow/silver), Tungsten jig + plastic |
Notable structure
- Deep basin: deep basin, around 57 ft
- Break off the point: drop-off, around 30 ft
- Main-lake point: point, around 17 ft
- Secondary point: point, around 17 ft
- Shallow bay flat: weed flat, around 6 ft
- Back-bay flat: weed flat, around 6 ft
Common questions
How deep is Loch Grannoch?
Loch Grannoch is about 67 ft (20 m) deep at its deepest point. The contours here are modeled from the water's real shape and maximum depth, so treat them as a rough guide.
What fish are in Loch Grannoch?
Anglers target northern pike, european perch, brown trout, arctic char on Loch Grannoch. This isn't a survey of the water — none is published for it — but an informed estimate from the species common to the region, narrowed by this water's depth, size and each species' range.
Where is the best fishing spot on Loch Grannoch?
Shallow bay flat is the top-rated area: a weed flat in about 6 ft of water that rates prime for european perch in spring. Open the map above to see every rated spot for each species and season.
When is the best time to fish Loch Grannoch?
For brown trout, the summer bite is best in after dark and early morning. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.
Nearby waters
Loch Fleet 1 mi · Loch Skerrow 4 mi · Stroan Loch 6 mi · Lochenbreck Loch 7 mi · Loch Dee 7 mi · Loch Whinyeon 8 mi · Woodhall Loch 8 mi · Round Loch of Glenhead 9 mi · Loch Ken or River Dee 9 mi · Long Loch of Glenhead 9 mi · Loch Dungeon 9 mi · Loch Mannoch 9 mi
See how Loch Grannoch stacks up: best northern pike lakes in United Kingdom · best european perch lakes in United Kingdom · best brown trout lakes in United Kingdom · best arctic char lakes in United Kingdom
Browse all United Kingdom fishing maps or see every water on DepthScout. How we build these maps. For fishing guidance only, never navigation.