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Fishing Llyn Teyrn: what the data says
5-acre lake near Gwynedd. The lake tops out around 26 ft. These contours are modeled — built from the real shoreline and the water's maximum depth — so read them as a guide, never as navigation. Species by species, here's what the data says the year looks like.
Traced from the shoreline, Llyn Teyrn runs 5 acres with 0.3 miles of edge. A shoreline index of 1.1 says round and simple: fish relate to depth changes here, not shoreline features. About 45% of the surface sits shallower than 15 ft on the modeled chart — that's the weed-and-bait zone.
Brown Trout fishing at Llyn Teyrn
Spring brown trout on Llyn Teyrn hold shallow, usually 3 to 25 ft. They move out to 8 to 26 ft in summer and finish the year down in 4 to 26 ft. Put Shoreline break first on the milk run — a drop-off near 12 ft that grades prime for summer. The feeding windows run after dark and early morning. The summer box starts with a spoon at the thermocline or a deep stickbait (night).
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 25 ft | dawn & dusk | Shoreline break (12 ft) | Stickbait off planer boards (shallow), Small spoon along mud lines |
| Summer | 8 to 26 ft | night & dawn | Shoreline break (12 ft) | Spoon at the thermocline, Deep stickbait (night) |
| Fall | 4 to 26 ft | dusk & dawn | Shoreline break (12 ft) | Jerkbait over gravel, Casting spoon |
| Winter | 4 to 26 ft | dawn | Shoreline break (12 ft) | Jigging spoon, Small stickbait (slow) |
European Perch fishing at Llyn Teyrn
In spring, european perch run shallow here, mostly 3 to 12 ft. Midsummer fish sit out in 7 to 26 ft before dropping to 8 to 26 ft for winter. Spring european perch concentrate at Shallow bay flat, a prime-rated weed flat around 3 ft. Fish it in early morning and you'll meet the bite. You won't need more than a drop-shot micro plastics or a small crankbait (perch pattern) most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | midday & dawn | Shallow bay flat (3 ft) | Small jig + curly tail, Inline spinner #1-2 |
| Summer | 7 to 26 ft | dawn | Deep basin (22 ft) | Drop-shot micro plastics, Small crankbait (perch pattern) |
| Fall | 8 to 26 ft | midday | Deep basin (22 ft) | Jigging spoon (small), Drop-shot on deep flats |
| Winter | 8 to 26 ft | midday & dawn | Deep basin (22 ft) | Tungsten jig + maggots, Small balance jig |
Northern Pike fishing at Llyn Teyrn
In spring, northern pike run shallow here, mostly 2 to 8 ft. Summer pushes them deeper, 8 to 20 ft, and winter fish settle into 5 to 15 ft. Shallow bay flat is the standout, a weed flat at roughly 3 ft, rated prime for spring northern pike. Time it for early morning and the evening. You won't need more than a bucktail or a weedless spoon over cabbage most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | Shallow bay flat (3 ft) | #5 inline spinner, Spoon (red/white) |
| Summer | 8 to 20 ft | dawn & dusk | Shoreline break (12 ft) | Bucktail, Weedless spoon over cabbage |
| Fall | 6 to 18 ft | midday & dawn | Shoreline break (12 ft) | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 5 to 15 ft | midday | Shallow bay flat (3 ft) | Tip-ups, Large jigging spoon |
Notable structure
- Deep basin: deep basin, around 22 ft
- Shoreline break: drop-off, around 12 ft
- Shallow bay flat: weed flat, around 3 ft
Common questions
How deep is Llyn Teyrn?
Llyn Teyrn is about 26 ft (8 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 Llyn Teyrn?
Anglers target northern pike, european perch, brown trout on Llyn Teyrn. 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 Llyn Teyrn?
Shallow bay flat is the top-rated area: a weed flat in about 3 ft of water that rates prime for european perch in spring. The map above holds the full rated-spot list for every species and season.
When is the best time to fish Llyn Teyrn?
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
Llyn Llydaw 1 mi · Llyn Cwmffynnon 1 mi · Glaslyn 2 mi · Llyn Gwynant 2 mi · Llynau Diwaunedd 3 mi · Llyn Bochlwyd 3 mi · Llyn Idwal 3 mi · Llyn Edno 3 mi · Llyn Ogwen 4 mi · Llyn Llagi 4 mi · Llyn Peris 4 mi · Llyn y Gader 5 mi
See how Llyn Teyrn stacks up: best northern pike lakes in United Kingdom · best european perch lakes in United Kingdom · best brown trout 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.