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Fishing Llyn Cerrigllwydion Isaf: what the data says
15-acre lake near Powys. The lake tops out around 32 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. What follows comes from the same scoring engine that paints the spots above.
On the chart, Llyn Cerrigllwydion Isaf draws 15 acres inside 0.8 miles of shoreline. A shoreline index of 1.4 says round and simple: fish relate to depth changes here, not shoreline features. About 50% of the surface sits shallower than 15 ft on the modeled chart — that's the weed-and-bait zone.
Brown Trout fishing at Llyn Cerrigllwydion Isaf
Come spring, look for brown trout tight to the bank in 3 to 25 ft. Expect a summer slide to 10 to 32 ft, then a winter hold in 5 to 32 ft. Start at Break off the point. It's a drop-off holding about 14 ft of water and rates prime come summer. Prime time lands in after dark and early morning. A spoon at the thermocline or a deep stickbait (night) is the honest summer answer here.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 25 ft | dawn & dusk | Main-lake point (8 ft) | Stickbait off planer boards (shallow), Small spoon along mud lines |
| Summer | 10 to 32 ft | night & dawn | Break off the point (14 ft) | Spoon at the thermocline, Deep stickbait (night) |
| Fall | 5 to 30 ft | dusk & dawn | Main-lake point (8 ft) | Jerkbait over gravel, Casting spoon |
| Winter | 5 to 32 ft | dawn | Break off the point (14 ft) | Jigging spoon, Small stickbait (slow) |
European Perch fishing at Llyn Cerrigllwydion Isaf
The spring pattern is a shallow one: european perch in 3 to 12 ft. As the season builds they drop to 8 to 28 ft, wintering in 10 to 32 ft. Top water on the chart: Shallow bay flat, a weed flat in the 4-ft range, prime in spring. Time it for early morning. Summer baits: a drop-shot micro plastics or a small crankbait (perch pattern) gets it done.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 12 ft | midday & dawn | Shallow bay flat (4 ft) | Small jig + curly tail, Inline spinner #1-2 |
| Summer | 8 to 28 ft | dawn | Deep basin (27 ft) | Drop-shot micro plastics, Small crankbait (perch pattern) |
| Fall | 10 to 32 ft | midday | Deep basin (27 ft) | Jigging spoon (small), Drop-shot on deep flats |
| Winter | 10 to 32 ft | midday & dawn | Deep basin (27 ft) | Tungsten jig + maggots, Small balance jig |
Northern Pike fishing at Llyn Cerrigllwydion Isaf
Start shallow in spring: northern pike sit in 2 to 8 ft that time of year. Warm water sends them out to 8 to 20 ft; cold water stacks them in 5 to 15 ft. Top water on the chart: Shallow bay flat, a weed flat in the 4-ft range, prime in spring. Fish it in early morning and the evening and you'll meet the bite. Throw a bucktail or a weedless spoon over cabbage until the fish tell you otherwise.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 8 ft | midday & dawn | Shallow bay flat (4 ft) | #5 inline spinner, Spoon (red/white) |
| Summer | 8 to 20 ft | dawn & dusk | Break off the point (14 ft) | Bucktail, Weedless spoon over cabbage |
| Fall | 6 to 18 ft | midday & dawn | Break off the point (14 ft) | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 5 to 15 ft | midday | Shallow bay flat (4 ft) | Tip-ups, Large jigging spoon |
Arctic Char fishing at Llyn Cerrigllwydion Isaf
Early season arctic char use the shallows, holding in 4 to 15 ft. Summer is a 10 to 32 ft game here, winter a 8 to 32 ft one. The chart's best answer is Deep basin — deep basin, 27 ft, prime for summer. Best bite is early morning. Tie on a jigging spoon vertical or a tube jig (smelt) and you're in the game.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 4 to 15 ft | midday & dawn | Break off the point (14 ft) | Small casting spoon (silver/orange), Jerkbait (small) |
| Summer | 10 to 32 ft | dawn | Deep basin (27 ft) | Jigging spoon vertical, Tube jig (smelt) |
| Fall | 8 to 30 ft | midday & dusk | Break off the point (14 ft) | Casting spoon (orange/gold), Beadhead streamer |
| Winter | 8 to 32 ft | midday & dawn | Deep basin (27 ft) | Jigging spoon (glow/silver), Tungsten jig + plastic |
Notable structure
- Deep basin: deep basin, around 27 ft
- Break off the point: drop-off, around 14 ft
- Main-lake point: point, around 8 ft
- Shallow bay flat: weed flat, around 4 ft
Common questions
How deep is Llyn Cerrigllwydion Isaf?
Llyn Cerrigllwydion Isaf is about 32 ft (10 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 Cerrigllwydion Isaf?
Anglers target northern pike, european perch, brown trout, arctic char on Llyn Cerrigllwydion Isaf. 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 Cerrigllwydion Isaf?
Shallow bay flat is the top-rated area: a weed flat in about 4 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 Cerrigllwydion Isaf?
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 Fyrddon Fawr 3 mi · Llyn Egnant 4 mi · Llyn Hîr 4 mi · Llyn Teifi 4 mi · Llyn Gynon 4 mi · Llyn Isaf 4 mi · Llynnoedd Ieuan 8 mi · Llyn Berwyn 10 mi · Maes-Llyn 10 mi · Llyn Clywedog 13 mi · Bugeilyn 14 mi · Llyn Cwm-byr 14 mi
See how Llyn Cerrigllwydion Isaf 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
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