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130-acre lake near Conwy. The lake tops out around 32 ft. The chart is a model: real shoreline, published maximum depth, interpolated in between. A planning tool, never a navigation product. The rest of this page walks each species through its year, using the map's own scoring.
On the chart, Llyn Eigiau Reservoir draws 130 acres inside 3.1 miles of shoreline. The shoreline is moderately structured (index 1.9) — enough points and pockets to pattern. The shallow band under 15 ft claims about 76% of the surface on the model — that's where the groceries are. Tip to tip the water measures near 1.3 mi with a 0.4-mi widest point. The water lies in Conwy. For a second option, Llyn Cowlyd Reservoir lies 2 mi south.
When the water first warms, brown trout slide up into 3 to 25 ft. Summer is a 10 to 32 ft game here, winter a 5 to 32 ft one. Start at Break off the point. It's a drop-off holding about 14 ft of water and rates prime come summer. The feeding windows run after dark and early morning. Keep a spoon at the thermocline or a deep stickbait (night) rigged through the warm months.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| 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 chart-limited; documented 25 to 60 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 chart-limited; documented 5 to 35 ft | dawn | Break off the point (14 ft) | Jigging spoon, Small stickbait (slow) |
Start shallow in spring: european perch sit in 3 to 12 ft that time of year. Warm water sends them out to 8 to 28 ft; cold water stacks them in 10 to 32 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 you'll meet the bite. Throw a drop-shot micro plastics or a small crankbait (perch pattern) until the fish tell you otherwise.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| 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 chart-limited; documented 10 to 33 ft | midday | Deep basin (27 ft) | Jigging spoon (small), Drop-shot on deep flats |
| Winter | 10 to 32 ft chart-limited; documented 12 to 33 ft | midday & dawn | Deep basin (27 ft) | Tungsten jig + maggots, Small balance jig |
The spring pattern is a shallow one: northern pike in 2 to 8 ft. As the season builds they drop to 8 to 20 ft, wintering in 5 to 15 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 and the evening. Summer baits: a bucktail or a weedless spoon over cabbage gets it done.
| 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 |
Spring arctic char on Llyn Eigiau Reservoir hold shallow, usually 4 to 15 ft. By summer they slide out to 10 to 32 ft, and by winter most fish are in 8 to 32 ft. The chart's best answer is Deep basin — deep basin, 27 ft, prime for summer. Prime time lands in early morning. The summer box starts with a jigging spoon vertical or a tube jig (smelt).
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| 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 chart-limited; documented 20 to 60 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 chart-limited; documented 10 to 40 ft | midday & dawn | Deep basin (27 ft) | Jigging spoon (glow/silver), Tungsten jig + plastic |
The chart marks 6 structure features on Llyn Eigiau Reservoir; the deepest is Deep basin at about 27 ft.
Llyn Eigiau Reservoir 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.
Anglers target brown trout, european perch, northern pike, arctic char on Llyn Eigiau Reservoir. 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.
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. Open the map above to see every rated spot for each species and season.
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.
Llyn Cowlyd Reservoir 2 mi · Ffynnon Llugwy Reservoir 2 mi · Llyn Crafnant 3 mi · Llyn Anafon 3 mi · Llyn Geirionydd 4 mi · Llyn Bychan 4 mi · Llyn Bodgynydd 4 mi · Llyn Goddionduon 5 mi · Llyn Ogwen 5 mi · Llyn Bochlwyd 5 mi · Llyn Idwal 6 mi · Llyn y Parc 6 mi
See how Llyn Eigiau Reservoir 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
More water nearby: Conwy fishing maps (18 charts). Browse all United Kingdom fishing maps. See every water on DepthScout. 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.