A new coastline to explore
5 coastal counties now covered: Kent, East Sussex, West Sussex, Hampshire, and the Isle of Wight.
Gwynedd has 29 shore marks rated for flounder. They're ranked below by how strongly flounder show at each spot, with today's live conditions beside every mark — so you can pick a spot that's worth fishing right now, not just on paper.
When to go
Out of season — best Oct–MarBest months: Oct–Mar · green months are prime, the outlined box is this month.
Tide Fish the flood
Time of day Daylight sessions fish best
Ranked by how strongly flounder show at each mark. The chip on the right is today's live fish forecast.
Bread-and-butter catch on lug/rag or small fish baits; work channel edges on the flood and early ebb.
Best on peeler/crab, rag or lug; fish the run of tide near channel edges on a light/medium ledger.
Common inside the estuary over sand/mud; rag/lug, maddies or small peeler; fish the last of flood into slack.
Best target; fish the flooding tide over mud/sand with rag/lug or small crab; keep leads light to avoid snagging.
Very common in the harbour; fish ragworm/lug or small crab on a running ledger close to the wall on the flood/early ebb.
Common near the estuary influence; peeler/rag tipped with lug, fished in channels on the flood.
Good in spring/autumn; small worm baits (rag/lug) on a running ledger, fish the edge of tide flow where sand meets stones.
Common in/near the estuary influence; take rag, lug or small strips. Work the first trough and any gutters on a steady retrieve.
Common around the estuary influence; rag/lug or small crab; fish the edge of channels on the ebb.
More likely closer to the estuary influence and in coloured water; worm baits and shorter casts can score.
Often close in over mixed sand; rag or lug, don’t always need big range—work shallow gutters on the flood.
Often close in, especially after rougher weather; ragworm, lug or small strips, works well at dusk.
More likely near any streamier outflow/softer ground; peeler crab or worm baits, fished close-in on the flood.
Shows in coloured water after a blow; rag/lug or small fish strips work, especially near any gutters and shallow run-throughs.
Often closer in than plaice; lug/rag or fish strip; can show well in coloured water and at night.
Often close in near any estuary influence; peeler/crab or small fish baits, keep leads light if surf allows.
Often close in; rag/lug or small crab, fish the last of flood into ebb in coloured water.
Takes lug/rag; look for any slight colour or freshwater influence after rain and work the nearer channels.
Often closer in and around any freshwater influence; rag/lug or small crab baits work on mixed ground.
Often close in on smaller tides and after rain/run-off. Rag or lug on a simple running ledger; try the first trough and shallow gulleys.
Shows in the softer areas and near any freshwater influence; ragworm and small crab baits work well.
Best after rougher seas and near any darker patches/gutters; lug or rag, keep leads light enough to fish the slope.
Can show where freshwater seepage/soft sand patches occur; rag or lug, especially on the ebb.
More likely near any freshwater influence/low-water gutters; good on smaller baits in coloured water.
Best around any streamy patches and closer range; rag, lug or peeler crab, especially on smaller tides.
Plus 4 more rated marks — browse every mark in Gwynedd.
Planning ahead? The live fish forecast map compares these marks across the week.
Top baits, best first
Rigs that work, best first
Full tactics, seasonal detail and more baits are on the Flounder species guide.
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New region just landed
We’ve added a whole new stretch of coastline — from Kent round to Hampshire and the Isle of Wight.
5 coastal counties now covered: Kent, East Sussex, West Sussex, Hampshire, and the Isle of Wight.
Every mark comes with a full guide, target species, baits and rigs, and live fishing forecasts.
Weather, tide, and sea conditions are already synced for every new mark, so you can plan a session right away.