Borth-y-Gest Harbour

6.4 · Harbour · Gwynedd

Borth-y-Gest Harbour is a small, sheltered tidal harbour at the head of the Dwyryd estuary, fished mainly from the harbour walls, slipway edges and nearby sand/mud at low water. It’s an easy-access mark for light-gear anglers, with calm water compared to the open coast; typical fishing is for flounder and mullet over sandy/muddy ground, with occasional bass on the flood and small gadoids in cooler months.

Should you fish Borth-y-Gest Harbour?

53 Fair

Today · Best available

Best available: 03:00-06:00

Most likely species: Flounder and Bass

Fair conditions. Best available around 03:00-06:00, but no window reaches the strong threshold today. Good chance of Flounder and Bass.

W 4 mph Rain 95% High tide 01:57

Fishable, but pick your timing carefully.

Plan this mark

7-day fishing forecast for Borth-y-Gest Harbour — 7-day forecast

Scores and best windows are weighted for .

Met Office Met Office · Open-Meteo

Where the data comes from. Weather and sea-state readings come from the Met Office and Open-Meteo forecast models, refreshed several times a day. High and low water are taken from tide-station predictions for this stretch of coast.

How the score works. Each window is scored 0–100 from the signals that most reliably move fish inshore: tide movement (a running tide carries food, so the last of the flood and first of the ebb are usually the prime spells), wind speed and direction (onshore wind stirs food into the surf — up to the point it makes fishing hard), sea state (a little wave and swell movement helps, heavy swell hurts), and weather — rain, temperature and light. Behind the headline number we score bite opportunity and comfort separately, and run a separate safety check on wind and swell. The size of the tide counts too: spring tides move more water than neaps, so the tidal range for this stretch of coast is weighed alongside the tide's direction, your target species and this mark — and unusually big springs strengthen the safety check, because the water rises faster and covers more ground.

Your target species counts. Pick a species below and the score also weights what we know about it — its season, preferred sea temperature, tide stage and sea state, and whether it feeds by day or night.

The rating is guidance, not a guarantee — conditions change fast on the coast, so always judge the sea in front of you before you fish.

Tuesday looks better than today. Unlock the week to see its score and exact window.

· windows & tide

Spring vs neap tides. Spring tides have a larger difference between high and low water, so more water moves on each tide — usually stronger flow that stirs up food and gets fish feeding. Neap tides have a smaller range and generally gentler movement. The range here is compared with what is normal for this stretch of coast, and the cycle swings between springs and neaps roughly every week, following the moon.

Big spring tides: the water rises faster and covers more ground than usual — double-check access routes and cut-off points before you fish.

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Borth-y-Gest Harbour is a sheltered estuary harbour mark where accuracy and timing matter more than distance. It is strongest for flounder and mullet, with bass a more conditional dusk/night or coloured-water flood-tide chance. The key decision is whether to fish the harbour edges and mouth for deeper water, or drop onto nearby sand/mud edges at lower stages to locate the channel before the tide fills.

  • Know whether to fish the harbour edge or the channel line.
  • Time the flood for flounder instead of guessing at low water.
  • Target mullet without spooking them in calm harbour water.
  • Pick the right bass window when colour and tide line up.
  • Avoid the mud-and-channel mistakes that waste short sessions.

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Forecast tuning currently supports Bass and Mackerel — more species are on the way.

Overall rating

6.4 /10

Blend of catch potential, access, safety, and overall experience.

Category scores

Catch Potential 6/10
Species Variety 6/10
Scenery & Comfort 8/10
Safety 7/10
Accessibility 8/10

Local knowledge

Borth-y-Gest Harbour fishing guide

Practical access, seasons, methods, tides, safety and facilities for this mark.

Borth-y-Gest Harbour is a small, sheltered estuary/harbour mark at the head of Tremadog Bay, best fished for mixed species on a rising tide and around the edges of the channels.

  • A handy spot for short sessions and sheltered fishing when the open coast is unfishable.
  • Expect a blend of estuary and sandy-bay species rather than consistent “big-fish” sport.
  • Most productive when you can put a bait into deeper water without snagging in weed or harbour debris.

The mark sits around the harbour/estuary mouth at Borth-y-Gest, a short drive from Porthmadog, with access along the waterfront and adjacent foreshore.

  • Access is generally on foot via the harbour front and nearby paths; distances are short but surfaces can be uneven.
  • At low water the harbour area opens out into mud/sand with channels—plan your route so you don’t get cut off.
  • Parking is typically in/around the village; be considerate with narrow roads, residents, and turning areas.
  • Fish from the harbour edges only where safe and where you are not obstructing boats, slipways, or walkers.

This is a classic North Wales estuary/harbour venue where species vary with season, water clarity, and how much bait is moving through the channels.

  • Bass: Often present in warmer months, especially on a flooding tide when sandeels/shrimp are pushed in.
  • Flounder: Common estuary target, particularly over clean sand/mud near channel edges.
  • Dab and other small flatfish: Possible over sandy patches, especially in cooler months.
  • Mullet: Sometimes encountered in quiet, sheltered water; best targeted with light gear and subtle presentation.
  • Schoolie codling/whiting (seasonal): Can show in colder months in the wider bay influence, though results vary.
  • Eels and small rays are possible but not reliable; treat them as “bonus” captures rather than target species.

Success here usually comes from keeping your rig fishing cleanly and placing baits where tidal flow concentrates food—channel edges, the harbour mouth, and any deeper scours.

  • Simple running ledger or pulley-style rigs with streamlined leads help keep contact in the tide without excessive snagging.
  • For flounder: A running ledger with a longer snood and small bait (ragworm, maddie, or a thin strip of fish) fished near the bottom.
  • For bass: Larger baits such as peeler crab, ragworm cocktails, or fish strip on a robust hook, presented on a flowing trace.
  • For mullet (if present): Light lines, small hooks, and delicate baits; keep disturbance low and avoid heavy leads.
  • Keep terminal tackle tidy—harbour marks can include weed, stones, and the occasional hidden obstruction.
  • A bit of mobility helps: if bites don’t come within 20–30 minutes, try a different piece of edge or a slightly different casting angle to find the channel.

The harbour and estuary fish best with water over the flats and enough depth for fish to move in—most anglers do well from mid-tide up to high, then on the first of the ebb.

  • Rising tide: Generally the most reliable window as fish push into newly covered ground.
  • High water: Can be good for bass and mullet in calmer conditions; watch for increased boat activity.
  • Low water: Often leaves extensive mud/sand; fish may concentrate in the main channels but access can be awkward.
  • After a bit of colour: A slight tinge in the water can help bass; too much freshwater and colour can slow sport.
  • Calm/settled weather: Favors mullet and finesse fishing; a light ripple can help conceal line and improve confidence.
  • Strong winds: The mark is relatively sheltered, but crosswinds can make presentation difficult and can push weed into the harbour.

It’s an easy-looking venue that can bite back if you underestimate the tide and the nature of estuary ground.

  • Soft mud and fast-filling channels: Avoid crossing unknown ground; you can be cut off quickly on a big flood.
  • Slips and falls: Harbour stones and seaweed-covered steps can be extremely slippery—wear grippy footwear.
  • Night fishing: Keep it simple and safe; use a headtorch and avoid moving far along the foreshore in the dark.
  • Boat movements: Don’t cast across navigation lines or block slipways; retrieve promptly if boats approach.
  • Weather and swell: Even sheltered marks can see surge at times—keep back from the edge if water is slapping the wall.
  • Consider a personal flotation device if fishing close to deep water, especially in winter or when alone.

Borth-y-Gest is a small village setting with limited “on-the-spot” angling facilities, but essentials are usually within a short drive in the Porthmadog area.

  • Public conveniences and refreshments may be seasonal—check locally before planning long sessions.
  • Tackle, bait, and additional supplies are more reliably sourced in nearby towns rather than at the harbour itself.
  • Mobile signal is often workable but can be variable depending on exact position and network.
  • Please take litter and discarded line home; harbour environments are particularly sensitive to hooks and mono left behind.

Fishing this mark is often about subtlety and placement rather than power-casting—find the deeper water and keep your bait in it.

  • Spend a few minutes at low-to-mid tide identifying the main channel and any deeper scours to target on the flood.
  • Keep leads as light as you can while still holding bottom; over-weighting increases snags and kills bite detection.
  • If small fish or crabs are a nuisance, toughen baits (fish strip, crab, or a protected cocktail) and shorten checks.
  • Use longer casts only if they put you into the channel; many bites come from surprisingly close range.
  • Handle bass and mullet carefully and return unwanted fish promptly—both can be fragile in warm weather.
  • Be courteous: it’s a shared space with residents, walkers, and harbour users, and good behaviour keeps access friendly.

There is no single, universally posted rule-set I can safely quote for this specific harbour without current local confirmation, so treat this as a “check before you fish” venue.

  • Look for harbour notices and signage regarding fishing, casting, access to slipways, and any seasonal restrictions.
  • Some harbours restrict fishing from certain structures or at certain times for safety—confirm locally on arrival.
  • Observe national and local byelaws on minimum sizes, protected species, and bait collection—check official sources for the current rules.
  • If you intend to collect bait (lug, rag, shellfish), ensure it’s permitted on that foreshore and avoid protected areas.
  • If asked to move by harbour staff or to avoid an operational area, do so promptly to maintain goodwill and safety.