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407-acre lake near Avon. The lake tops out around 38 ft. This chart interpolates between a real shoreline and a known maximum depth. It will point you at likely water, but it is not a navigation product. What the data behind the map says about each species, season by season:
Blagdon Lake maps at 406 acres behind 5.7 miles of shoreline. A middling shoreline index (2) gives it some bays to work without being a maze. About 54% of the surface sits shallower than 15 ft on the modeled chart — that's the weed-and-bait zone. Tip to tip the water measures near 1.7 mi with a 0.8-mi widest point. It sits in Bath and North East Somerset. Chew Valley lake sits 3 mi east — the closest neighbouring chart.
The spring pattern is a shallow one: brown trout in 3 to 25 ft. Midsummer fish sit out in 11 to 38 ft before dropping to 5 to 35 ft for winter. The spot to know is Break off the point, a drop-off in about 17 ft of water that rates prime for brown trout in summer. Plan around after dark and early morning in the warm months. Summer baits: a spoon at the thermocline or a deep stickbait (night) gets it done.
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 (10 ft) | Stickbait off planer boards (shallow), Small spoon along mud lines |
| Summer | 11 to 38 ft chart-limited; documented 25 to 60 ft | night & dawn | Break off the point (17 ft) | Spoon at the thermocline, Deep stickbait (night) |
| Fall | 5 to 30 ft | dusk & dawn | Main-lake point (10 ft) | Jerkbait over gravel, Casting spoon |
| Winter | 5 to 35 ft | dawn | Break off the point (17 ft) | Jigging spoon, Small stickbait (slow) |
Come spring, look for european perch tight to the bank in 3 to 12 ft. They move out to 8 to 28 ft in summer and finish the year down in 12 to 33 ft. If you only fish one area, make it Shallow bay flat: a weed flat around 5 ft that scores prime in spring. Best bite is 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 (5 ft) | Small jig + curly tail, Inline spinner #1-2 |
| Summer | 8 to 28 ft | dawn | Break off the point (17 ft) | Drop-shot micro plastics, Small crankbait (perch pattern) |
| Fall | 10 to 33 ft | midday | Deep basin (32 ft) | Jigging spoon (small), Drop-shot on deep flats |
| Winter | 12 to 33 ft | midday & dawn | Deep basin (32 ft) | Tungsten jig + maggots, Small balance jig |
Early season northern pike use the shallows, holding in 2 to 8 ft. Summer is an 8 to 20 ft game here, winter a 5 to 15 ft one. The chart's best answer is Shallow bay flat — weed flat, 5 ft, prime for spring. Best bite is 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 (5 ft) | #5 inline spinner, Spoon (red/white) |
| Summer | 8 to 20 ft | dawn & dusk | Break off the point (17 ft) | Bucktail, Weedless spoon over cabbage |
| Fall | 6 to 18 ft | midday & dawn | Break off the point (17 ft) | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 5 to 15 ft | midday | Shallow bay flat (5 ft) | Tip-ups, Large jigging spoon |
In spring, arctic char run shallow here, mostly 4 to 15 ft. Summer pushes them deeper, 11 to 38 ft, and winter fish settle into 10 to 38 ft. Deep basin is the standout, a deep basin at roughly 32 ft, rated prime for summer arctic char. Time it for early morning. You won't need more than a jigging spoon vertical or a tube jig (smelt) most summer days.
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 (17 ft) | Small casting spoon (silver/orange), Jerkbait (small) |
| Summer | 11 to 38 ft chart-limited; documented 20 to 60 ft | dawn | Deep basin (32 ft) | Jigging spoon vertical, Tube jig (smelt) |
| Fall | 8 to 30 ft | midday & dusk | Break off the point (17 ft) | Casting spoon (orange/gold), Beadhead streamer |
| Winter | 10 to 38 ft chart-limited; documented 10 to 40 ft | midday & dawn | Deep basin (32 ft) | Jigging spoon (glow/silver), Tungsten jig + plastic |
Early season european eel use the shallows, holding in 5 to 20 ft. Expect a summer slide to 6 to 28 ft, then a winter hold in 11 to 38 ft. Put Deep basin first on the milk run — a deep basin near 32 ft that grades prime for winter. In summer the feeding windows fall in after dark and the evening.
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 | 5 to 20 ft | dusk & night | Break off the point (17 ft) | |
| Summer | 6 to 28 ft | night & dusk | Break off the point (17 ft) | |
| Fall | 10 to 38 ft | night | Break off the point (17 ft) | |
| Winter | 11 to 38 ft chart-limited; documented 18 to 50 ft | midday | Deep basin (32 ft) |
Spring tench on Blagdon Lake hold shallow, usually 2 to 10 ft. They move out to 3 to 12 ft in summer and finish the year down in 12 to 30 ft. Put Shallow bay flat first on the milk run — a weed flat near 5 ft that grades prime for spring. The feeding windows run early morning and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 10 ft | dusk | Shallow bay flat (5 ft) | |
| Summer | 3 to 12 ft | dawn & dusk | Shallow bay flat (5 ft) | |
| Fall | 6 to 18 ft | midday | Break off the point (17 ft) | |
| Winter | 12 to 30 ft | midday | Deep basin (32 ft) |
Blagdon Lake also holds rainbow trout (8 to 30 ft in summer). Pick any of them on the map above for rated spots and bait picks.
Blagdon Lake carries 6 mapped structure features, topping out (or rather bottoming out) at Deep basin, about 32 ft down.
Blagdon Lake is about 38 ft (12 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, european eel, tench, rainbow trout on Blagdon Lake. 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 5 ft of water that rates prime for european perch in spring. Scroll up to the map for the complete spot list by 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.
Chew Valley lake 3 mi · Cheddar Reservoir 6 mi · Shear Water 23 mi · Cothelstone Park Lake 27 mi · Fonthill Lake 32 mi · Wimbleball Lake 38 mi · Cotswold Water Park Lake 12 41 mi · Llwyn-on Reservoir 45 mi · Kenfig Pool 47 mi · Llyn Fach 47 mi · Llangorse Lake 48 mi · Blashford Lake 51 mi
See how Blagdon Lake 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. 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.