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Fishing Llyn Cadarn: what the data says
3-acre lake near Isle of Anglesey. The lake tops out around 21 ft. Contours on this water are modeled from its actual shoreline and max depth. Good for finding likely water, never for navigation. Here's the year, species by species, as the scoring engine sees it.
The drawn water covers 3 acres wrapped in 0.3 miles of bank. A shoreline index of 1.1 says round and simple: fish relate to depth changes here, not shoreline features. Roughly 46% of the water is 15 ft or less as modeled, the band where the food chain lives.
Brown Trout fishing at Llyn Cadarn
Start shallow in spring: brown trout sit in 3 to 21 ft that time of year. Summer keeps them at 6 to 21 ft, and they winter in 3 to 21 ft. The spot to know is Shoreline break, a drop-off in about 9 ft of water that rates prime for brown trout in summer. Warm-month bites cluster around after dark and early morning. Throw a spoon at the thermocline or a deep stickbait (night) until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 21 ft | dawn & dusk | Shoreline break (9 ft) | Stickbait off planer boards (shallow), Small spoon along mud lines |
| Summer | 6 to 21 ft | night & dawn | Shoreline break (9 ft) | Spoon at the thermocline, Deep stickbait (night) |
| Fall | 4 to 21 ft | dusk & dawn | Shoreline break (9 ft) | Jerkbait over gravel, Casting spoon |
| Winter | 3 to 21 ft | dawn | Shoreline break (9 ft) | Jigging spoon, Small stickbait (slow) |
European Perch fishing at Llyn Cadarn
When the water first warms, european perch slide up into 3 to 12 ft. By summer they slide out to 6 to 21 ft, and by winter most fish are in 6 to 21 ft. If you only fish one area, make it Shallow bay flat: a weed flat around 3 ft that scores prime in spring. In summer the feeding windows fall in early morning. Keep a drop-shot micro plastics or a small crankbait (perch pattern) rigged through the warm months.
| 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 | 6 to 21 ft | dawn | Deep basin (18 ft) | Drop-shot micro plastics, Small crankbait (perch pattern) |
| Fall | 6 to 21 ft | midday | Deep basin (18 ft) | Jigging spoon (small), Drop-shot on deep flats |
| Winter | 6 to 21 ft | midday & dawn | Deep basin (18 ft) | Tungsten jig + maggots, Small balance jig |
Northern Pike fishing at Llyn Cadarn
Spring northern pike on Llyn Cadarn hold shallow, usually 2 to 8 ft. By summer they slide out to 8 to 20 ft, and by winter most fish are in 5 to 15 ft. The chart's best answer is Shallow bay flat — weed flat, 3 ft, prime for spring. Prime time lands in early morning and the evening. The summer box starts with a bucktail or a weedless spoon over cabbage.
| 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 (9 ft) | Bucktail, Weedless spoon over cabbage |
| Fall | 6 to 18 ft | midday & dawn | Shoreline break (9 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 18 ft
- Shoreline break: drop-off, around 9 ft
- Shallow bay flat: weed flat, around 3 ft
Common questions
How deep is Llyn Cadarn?
Llyn Cadarn is about 21 ft (6 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 Cadarn?
Anglers target northern pike, european perch, brown trout on Llyn Cadarn. 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 Cadarn?
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. Open the map above to see every rated spot for each species and season.
When is the best time to fish Llyn Cadarn?
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 yr Wyth-Eidion 1 mi · Llyn Alaw 7 mi · Llyn Coron 10 mi · Llyn Penrhyn 11 mi · Llyn Dinam 11 mi · Llyn Padarn 13 mi · Llyn Anafon 15 mi · Llyn Peris 15 mi · Llyn Ogwen 16 mi · Llyn Idwal 16 mi · Llyn Cwellyn 17 mi · Ffynnon Llugwy Reservoir 17 mi
See how Llyn Cadarn 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.