Salt water depth chart
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Rating depth structure for atlantic herring.
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3,085-acre Upper Humber Estuary fishing map with Environment Agency multibeam/SurfZone ODN contours (69.44% measured, 96.19% assessed), four measured spots, exact EA TraC occurrence, three dated survey cards, official access and current GOV.UK/applicable IFCA guidance. The water tops out around 37 ft. The depth chart comes from Environment Agency bathymetric survey data, so the contours are survey-derived rather than computer-modeled. Below is the species-by-species picture, pulled from the same data the map uses.
Drawn out, this is 3,074 acres of water rimmed by 73.6 miles of bank — one island included. That shoreline is heavily fingered (development index 9.5) — bays, points and pockets everywhere, which multiplies the fishable edge. Nothing on this chart breaks 15 ft, which makes the whole surface littoral: weeds, bait and ambush cover everywhere. Tip to tip the water measures near 17.1 mi with a 10-mi widest point. Closest neighbour on DepthScout: Middle Humber Estuary, 15 mi northeast of here.
Spring european flounder on Upper Humber Estuary hold shallow, usually 5 to 25 ft. They move out to 6 to 35 ft in summer and finish the year down in 11 to 37 ft. Put Directly measured upper-flat transition first on the milk run — a feeding flat near 5 ft that grades prime for spring. The feeding windows run early morning and the evening. The summer box starts with a bottom jig with spinner blade.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 25 ft | dusk | Directly measured upper-flat transition (5 ft) | Small bucktail dragged on bottom |
| Summer | 6 to 35 ft | dawn & dusk | Directly measured upper-flat transition (5 ft) | Bottom jig with spinner blade |
| Fall | 7 to 37 ft | dusk | Directly measured upper-flat transition (5 ft) | Compact bottom jig |
| Winter | 11 to 37 ft | midday | Deepest directly measured basin cell (37 ft) | Small bottom jig |
Spring european smelt on Upper Humber Estuary hold shallow, usually 3 to 25 ft. By summer they slide out to 11 to 37 ft, and by winter most fish are in 11 to 37 ft. The chart's best answer is Deepest directly measured basin cell — deep basin, 37 ft, prime for summer. Prime time lands in early morning and the evening. The summer box starts with a tiny vertical spoon or a micro jig.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 25 ft | night & dusk | Strongest directly measured local depth transition (3 ft) | Micro silver jig, Tiny feather rig |
| Summer | 11 to 37 ft | dawn & dusk | Deepest directly measured basin cell (37 ft) | Tiny vertical spoon, Micro jig |
| Fall | 10 to 37 ft | dusk | Deepest directly measured basin cell (37 ft) | Micro jig, Tiny silver spoon |
| Winter | 11 to 37 ft | dusk | Deepest directly measured basin cell (37 ft) | Tiny glow jig, Micro ice spoon |
Spring puts european seabass in skinny water — 3 to 25 ft is the zone. Warm water sends them out to 2 to 30 ft; cold water stacks them in 7 to 37 ft. Directly measured lower-channel shoulder is the standout, a channel edge at roughly 10 ft, rated prime for summer european seabass. Plan around early morning and the evening in the warm months. A surface lure or a paddle-tail soft plastic covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 3 to 25 ft | dawn & dusk | Directly measured lower-channel shoulder (10 ft) | Paddle-tail soft plastic, Shallow minnow plug |
| Summer | 2 to 30 ft | dawn & dusk | Directly measured lower-channel shoulder (10 ft) | Surface lure, Paddle-tail soft plastic |
| Fall | 4 to 37 ft | dawn & dusk | Directly measured lower-channel shoulder (10 ft) | Slim metal lure, Minnow plug |
| Winter | 7 to 37 ft | midday | Deepest directly measured basin cell (37 ft) | Slow soft-plastic shad, Suspending minnow |
Start shallow in spring: european eel sit in 5 to 20 ft that time of year. Summer pushes them deeper, 6 to 28 ft, and winter fish settle into 11 to 37 ft. The spot to know is Deepest directly measured basin cell, a deep basin in about 37 ft of water that rates prime for european eel in winter. Warm-month bites cluster around after dark and the evening.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 20 ft | dusk & night | Directly measured lower-channel shoulder (10 ft) | |
| Summer | 6 to 28 ft | night & dusk | Directly measured lower-channel shoulder (10 ft) | |
| Fall | 10 to 37 ft | night | Deepest directly measured basin cell (37 ft) | |
| Winter | 11 to 37 ft | midday | Deepest directly measured basin cell (37 ft) |
Spring puts atlantic herring in skinny water — 5 to 25 ft is the zone. Warm water sends them out to 11 to 37 ft; cold water stacks them in 11 to 37 ft. Deepest directly measured basin cell is the standout, a deep basin at roughly 37 ft, rated prime for summer atlantic herring. Plan around early morning and the evening in the warm months. A herring feather rig or a small silver jig covers the summer program.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 5 to 25 ft | dawn & dusk | Directly measured upper-flat transition (5 ft) | Small herring feather rig, Micro jig rig |
| Summer | 11 to 37 ft | dawn & dusk | Deepest directly measured basin cell (37 ft) | Herring feather rig, Small silver jig |
| Fall | 9 to 37 ft | dawn & dusk | Deepest directly measured basin cell (37 ft) | Small feather rig, Compact silver spoon |
| Winter | 11 to 37 ft | midday | Deepest directly measured basin cell (37 ft) | Small silver jig, Sparse feather rig |
In spring, european plaice run shallow here, mostly 8 to 35 ft. Summer pushes them deeper, 6 to 37 ft, and winter fish settle into 11 to 37 ft. Directly measured lower-channel shoulder is the standout, a channel edge at roughly 10 ft, rated prime for fall european plaice. Time it for early morning and the evening. You won't need more than a light spooned bottom rig or a beaded trace most summer days.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 8 to 35 ft | dusk | Directly measured upper-flat transition (5 ft) | Beaded flowing trace |
| Summer | 6 to 37 ft | dawn & dusk | Directly measured upper-flat transition (5 ft) | Light spooned bottom rig, Beaded trace |
| Fall | 7 to 37 ft | dusk | Directly measured lower-channel shoulder (10 ft) | Beaded bottom trace |
| Winter | 11 to 37 ft | midday | Deepest directly measured basin cell (37 ft) |
Upper Humber Estuary also holds common sole (3 to 30 ft in summer). Pick any of them on the map above for rated spots and bait picks.
Upper Humber Estuary carries 13 mapped structure features, topping out (or rather bottoming out) at Deepest directly measured basin cell, about 37 ft down.
Access data: RSPB. Confirm conditions and fees locally before you launch.
Upper Humber Estuary is about 37 ft (11 m) deep at its deepest point. The depth chart comes from Environment Agency bathymetric survey data, so the contours are survey-derived rather than computer-modeled.
Anglers target european flounder, european smelt, european seabass, european eel, atlantic herring, european plaice, common sole on Upper Humber Estuary.
Directly measured upper-flat transition is the top-rated area: a feeding flat in about 5 ft of water that rates prime for european flounder in spring. Scroll up to the map for the complete spot list by species and season.
For european flounder, the summer bite is best in early morning and the evening. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.
Middle Humber Estuary 15 mi · Great Lake or Welbeck 28 mi · Hornsea Mere 32 mi · Covenham Reservoir 36 mi · Humber Mouth - Spurn 38 mi · Derwent Reservoir 41 mi · Ladybower Reservoir 41 mi · Gormire Lake 47 mi · White Holme Reservoir 51 mi · Attenborough NR 53 mi · Gouthwaite Reservoir 54 mi · Widdop Reservoir 54 mi
See how Upper Humber Estuary stacks up: best atlantic herring lakes in United Kingdom · best european flounder lakes in United Kingdom · best european seabass lakes in United Kingdom · best common sole lakes in United Kingdom
Browse all United Kingdom fishing maps. See every water on DepthScout. Bathymetry credit: Environment Agency Multibeam Bathymetry + SurfZone DEM 2019 (Ordnance Datum Newlyn (ODN); 69% measured, 27% source-interpolated). 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.