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Dinas Dinlle

Beach · Salt water · in The Welsh coast and Anglesey

A long steep bank of sand and cobble running south from the Menai south entrance under the Iron Age hillfort that names it, facing across Caernarfon Bay. Clean shelving ground with deep water reachable from the beach, which is the property that makes the fishing here unlike the shallow surf beaches either side.

Safety: cold water shock — can cause serious injury or death. 2 more points apply here.

What each one does, and what reduces it ↓

FishingHQ describes what this place is, not whether you may fish it. Access, permits and who to ask.

What you can catch here

Documented at this place, grouped by how you would be fishing, with how strongly the sources support each one. This is what has been written down, not a forecast, and being listed is never permission to fish.

From the shore · 4

What these strengths mean
Established quarry
Fishing sources describe this as a normal local target here, not merely as caught.
Recorded here
At least one credible public account of this species being caught here. That is all it means.
Places, accounts and sources are counted separately
A fish documented once at each of six marks is still documented once at each of six marks. Breadth is reported as a place count and never raises the strength, and sources are deduplicated across places so one publisher covering a whole coast counts as one. A fishery account is a source describing the fishing; a recorded catch is a report of a specific catch. They are counted apart because they are not the same evidence.

Recorded here, but not a species to target

These are recorded here and are not quarry. Each is either assessed as Critically Endangered or protected by statute in this jurisdiction, and taking one may be prohibited outright — elsewhere every rod-caught fish must be returned. Read the species page and check the current rules with the authority before fishing.

Tope

Fish documented nearby, not here

Nothing below has been documented at Dinas Dinlle itself. Each one has been documented at a named place on the same ground, and the places are listed with it. Treat this as what the water around here holds rather than as a catch list for this mark.

Also documented at neighbouring places

One or two accounts each, on the ground around here. Enough to know the fish is caught in these waters; not enough to say anything about this place.

From the shore

How people fish it

Practised here: Sea fishing.

Methods the sources name for this ground. Each one is explained in full on its own page.

  • Ledgering

    Fishing a bait on the bottom held by a weight, with no float — the simplest way to fish at distance, in depth, or in wind.

  • Spinning

    Casting an artificial lure and retrieving it so that it moves like something alive — the most direct form of lure fishing.

The ground and the water

The ground
A long steep bank of sand and cobble running south from the Menai south entrance under the Iron Age hillfort that names it, facing across Caernarfon Bay. Clean shelving ground with deep water reachable from the beach, which is the property that makes the fishing here unlike the shallow surf beaches either side.
Exposure
Open west and south-west across Caernarfon Bay to the Irish Sea, with the Llyn giving partial shelter from the south.
Depth
Steeply shelving, with usable depth close in for a sand beach.
Tide and flow
The stream out of the Menai south entrance runs past the northern end of this beach and is the reason the ground stays clean.

Through the year

A bass beach that the guide says produces into the winter as well, which is unusual on this coast. Tope are a summer fish here.

The months the sources attach to each species here. Where a species carries no season it is listed underneath rather than assumed to run through the year.

The months in which each profiled species is recorded as quarry at this location.
SpeciesJFMAMJJASOND
European sea bass — established quarry, recorded in May, June, July, August, September, October, November, December.
Starry smooth-hound — recorded here, recorded in May, June, July, August.
Tope — recorded here, recorded in June, July, August, September.

Recorded here with no season stated: European flounder, Thornback ray.

Safety

Cold water shock — Can cause serious injury or death

UK coastal and inland water is cold enough for most of the year to trigger the involuntary gasp and the loss of swimming ability that decides most immersion deaths, and it does so within the first minute, long before hypothermia is relevant.

What reduces it: Wear a buoyancy aid rather than carry one, carry a means of calling for help on the person rather than in a bag, and plan on the assumption that an unplanned entry into the water is survivable only if somebody knows immediately.

Moving water and currents — Can cause serious injury or death

Tidal races and overfalls form and disperse with the state of the tide, producing standing waves and fast confused water where flat water was an hour earlier. Small craft caught in a race on the wrong state face conditions that paddling or a small engine will not overcome, and a person swept from rock into a running stream is carried away from the entry point immediately.

What reduces it: Plan against tidal stream timing rather than against wind alone; obtain local knowledge of when each piece of water runs and when it is slack; never launch a small craft near a race without that information; and treat the state of the tide as the go or no-go variable it is here.

Worse when:

  • Spring tides, when the streams run hardest
  • Wind against tide, which stands the water up steeply
  • Any small craft, and kayaks in particular, whose speed is a fraction of the stream's

Cliffs and rock platforms — Can cause serious injury or death

Rock platforms on the north and west put an angler beside deep, fast-moving water, sometimes with a descent that is much harder to reverse than to make. Immersion here is compounded by the stream, which removes any prospect of climbing out where you went in.

What reduces it: Watch a mark for a long period before committing; wear a buoyancy aid; never fish rock alone; plan the exit for a worse sea than the one you arrived in; and know whether the mark is cut off by the tide.

Rules and access

FishingHQ does not know the current access position here. Shore angling in Wales is not rod-licensed, but access rights, landowner permission, local authority and harbour byelaws, national and inshore fisheries measures, and site designations all apply and all change. Check the current position with Natural Resources Wales, the harbour or local authority, and the landowner before going.

Who holds the answer:

  • Natural Resources Wales, which administers marine and fisheries regulation in Welsh waters.
  • The local authority and, where one exists, the harbour authority, for access, byelaws and shellfish classification.
  • The Welsh environmental and fisheries authority, for licensing, sea fisheries rules and enforcement in Wales
  • The relevant local authority, for byelaws and for shellfish harvesting classification and closures
  • The body managing any marine protected area on the stretch concerned
  • The harbour authority for working harbours and the relevant landowner for access points
  • The coastguard, for tidal stream and safety information, and local charter skippers whose knowledge of the races is operative safety information

Nearby fishing

Other publicly documented places within about 40 km, by distance. Positions are approximate public geography and are never exact marks.

Dinas DinlleCaernarfon and the Menai south entranceLlanddwyn IslandTrefor pierThe Menai Strait and the SwelliesCricciethCymyran and RhosneigrMorfa NefynPwllheli
Dinas Dinlle and the publicly documented places around it. Approximate positions, not marks. Positions are approximate by design — they are capped at about a hundred metres and describe where a named public place is, not where fish are and not a mark. Everything plotted here is also listed below.

Sources for this place

  • JNCC species and habitat conservation advice — Joint Nature Conservation Committee (Conservation authority)Relied on for: Description, designation and habitat characterisation of the named coastal and marine features of the United Kingdom, and the species characteristically associated with them.States this directlyCitation checked — the work exists and is described correctly
  • Cefas science, advice and data on marine and freshwater environments — Centre for Environment, Fisheries and Aquaculture Science (Government fisheries body)Relied on for: Marine environmental science for UK shelf seas: sediment characterisation, estuarine process, shellfish bed distribution, tidal range and the monitoring that describes them.States this directlyCitation checked — the work exists and is described correctly
  • Sea Angler — Bauer Media (Specialist angling publication)Relied on for: Long-running published description of British sea angling practice by region, ground type and named mark.FishingHQ's interpretation of what it saysCitation checked — the work exists and is described correctly
  • General angling website restatements of established technique — Various (Credible secondary source)Relied on for: Widely restated public descriptions of which places are conventionally fished and how, recorded as practitioner consensus rather than as scholarship, and not relied on for access, permission or any current rule.Background and mechanism onlyCitation checked — the work exists and is described correctly
  • Sea fishing in north Wales — the mark guide — Turner's Tackle (Credible secondary source)Relied on for: A north Wales mark guide naming this beach as a known bass hotspot producing in winter, and as one of the only beaches from which tope can be caught from the shore.States this directlyPassage read and verified

How FishingHQ labels evidence is explained in the evidence policy. Last reviewed 2026-08-16.

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