Flounder Fishing in Vale of Glamorgan

Vale of Glamorgan has 30 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–Mar
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Best months: Oct–Mar · green months are prime, the outlined box is this month.

Tide Fish the flood

Time of day Daylight sessions fish best

Best flounder marks in Vale of Glamorgan

Ranked by how strongly flounder show at each mark. The chip on the right is today's live fish forecast.

Barry Island (Whitmore Bay) Reliable for flounder
Today 65 Good

Reliable on rag/lug or small crab; work the gutters on the flood and at night in colder months.

Gileston Beach Reliable for flounder
Today 65 Good

Common over mixed sand/mud; ragworm or maddies on a short hooklength; works well mid-tide up to high.

Porthkerry Beach Reliable for flounder
Today 65 Good

Common on the sandy areas; ragworm/madder lug on a simple running ledger works well, especially around mid-tide.

Llantwit Major Beach Reliable for flounder
Today 65 Good

Catches from the shallower surf zone, especially on smaller floods; rag, lug or small crab baits; try moving to find patches.

The Knap (Barry) Reliable for flounder
Today 65 Good

Common in the bay; lug/rag or mussel, light leads and keep baits on the deck.

Penarth Esplanade Reliable for flounder
Today 65 Good

Year-round with peaks in autumn; rag/lug or small fish strip; keep leads just heavy enough to hold in the run.

St Donat’s Castle Beach Reliable for flounder
Today 65 Good

Aim for mixed sand/shingle and the edges of weed; ragworm or lug on light leads works well on smaller tides.

East Aberthaw Beach Reliable for flounder
Today 65 Good

Gutters and the lower beach produce fish on rag/maddie or small lug baits; a moving rig or light ledger can help in calmer seas.

Merthyr Mawr Sand Dunes Reliable for flounder
Today 65 Good

More likely closer to the Ogmore outflow and along the edge of the estuary; rag/lug on a short hooklength, light leads when possible.

St. Athan Beach Reliable for flounder
Today 65 Good

Close-in in the shallows and channels; rag, maddies or lug on a 1–2 hook flapper works well.

Cwm Colhuw Bay Reliable for flounder
Today 65 Good

Often close in; lug/madder or rag; keep leads light enough to fish the inner surf without burying.

Barry Docks Breakwater Worth a try for flounder
Today 65 Good

Picks up in calmer spells inside/near the channel; ragworm or small crab on light(ish) leads when tide eases.

Penarth Marina Breakwater Worth a try for flounder
Today 65 Good

Fish the sandier runs near the inner harbour/edges with rag/lug; better around neaps and after rain.

Sully Beach Worth a try for flounder
Today 65 Good

Occasional, especially after rain/coloured water; rag/lug or small fish baits. Fish the gullies on mid-tide.

Bendrick Rock Worth a try for flounder
Today 65 Good

Occasional on sandy runs close in; rag or small fish baits on a simple running ledger, best around slackening tides.

Jackson’s Bay (Barry) Worth a try for flounder
Today 65 Good

Best close in on mixed sand/shingle; worm or small crab baits, slow retrieve can help.

Rhoose Beach Worth a try for flounder
Today 65 Good

Often close in, especially around any freshwater seepage; rag/lug or small fish strip baits.

Rhoose Point Worth a try for flounder
Today 65 Good

In sandy seams and calmer corners; rag or small fish strip on light leads. Often better on smaller tides or when run is dropping.

St. Mary’s Well Bay Worth a try for flounder
Today 65 Good

On the sand/shingle margins, especially with a bit of tide run; rag/lug baits; useful ‘filler’ species when rays aren’t showing.

Limpert Bay Worth a try for flounder
Today 65 Good

Closer in on mixed sand/shingle; lug or rag, especially around gutters on the flooding tide.

Aberthaw Worth a try for flounder
Today 65 Good

Occasional over sandier stretches; rag/lug baits on a simple running ledger, often best around mid-tide.

Monknash Beach Worth a try for flounder
Today 65 Good

Closer-in on ragworm/lug; look for calmer corners and small gutters on the flooding tide.

Cold Knap Point Worth a try for flounder
Today 65 Good

Pick up over the adjacent sandier ground; ragworm or small fish strip, especially around tide changes.

Sully Bay Worth a try for flounder
Today 65 Good

Pick them up on worm baits, especially in coloured water; don’t overcast—often closer in around gently shelving ground.

Lavernock Bay Worth a try for flounder
Today 65 Good

Occasional on cleaner patches among the rough; rag/crab baits fished static around slack water.

Plus 5 more rated marks — browse every mark in Vale of Glamorgan.

Planning ahead? The live fish forecast map compares these marks across the week.

Tactics for flounder

Top baits, best first

  1. Ragworm
  2. White Rag
  3. Blow Lug
  4. Peeler Crab

Rigs that work, best first

  1. Long & Low
  2. Running Ledger
  3. Two-Hook Flapper

Full tactics, seasonal detail and more baits are on the Flounder species guide.

Flounder fishing elsewhere