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6.1 · Estuary · Cardiff
Grangetown Foreshore is a tidal estuary shore mark on the Cardiff Bay/Severn Estuary side, fished from firm foreshore and man‑made edges near the river mouth with easy walk-in access from local roads and paths. It’s mainly mixed flatfish and school fish with occasional rays/dogs in range on bigger tides; best when there’s some run and colour in the water, with snaggy patches around hard structure and cleaner sand/mud channels between.
Today · Best available
Best available: 18:00-21:00 around the rising tide
Most likely species: Flounder and Plaice
Fair conditions. Best available around 18:00-21:00 around the rising tide, but no window reaches the strong threshold today. Good chance of Flounder and Plaice.
Fishable, but pick your timing carefully.
Scores and best windows are weighted for .
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.
Next 7 days · Aug 6–12, 2026
Local tide times
Wednesday looks better than today. Unlock the week to see its score and exact window.
Fishing rating
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Bite opportunity
Comfort
Safety check
Strong spring tides — the sea rises faster and reaches further up the shore than usual, so allow extra margin on access routes and cut-off points.
The fishing rating combines opportunity and comfort. Always check local sea conditions; the safety check is guidance, not a guarantee.
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.
Tide curve will appear once tide data is available.
All windows will appear once the forecast is loaded.
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Why this window?
Bite
Comfort
Safety
What's moving this score
This window is scored for — its season, preferred tide, temperature and sea state are weighed alongside the general conditions below.
Mixed signals; focus on timing and location.
Trip planner
Choose when you're free and what you want to catch. We'll show the best tide, weather window and method for this mark.
Premium unlocks exact windows, tactics and alerts.
Jump to towns around this mark for more marks and guides.
Explore nearby towns: Grangetown · Cardiff · Cardiff · Penarth · Penarth
Zoom and pan to explore access points and nearby marks.
Jump to guideForecast tuning currently supports Bass and Mackerel — more species are on the way.
Overall rating
Blend of catch potential, access, safety, and overall experience.
Category scores
Local knowledge
Practical access, seasons, methods, tides, safety and facilities for this mark.
Grangetown Foreshore is a sheltered inner-estuary/inner-bay shore mark on the Cardiff side of the Bristol Channel, offering mixed fishing close to the city with the added twist of strong tidal movement and a lot of man‑made structure. It can fish well for species that patrol the channel edges and mud/sand flats, but it’s a venue where timing, water clarity and safety awareness matter as much as bait choice.
The foreshore at Grangetown sits on the south side of Cardiff, close to industrial/port infrastructure and the lower reaches of the river/estuary before it opens into the wider Bristol Channel. Access is typically on foot along the shore path/sea wall and down to the foreshore where safe and permitted.
This area can produce a classic Cardiff estuary mix, with species presence strongly influenced by season, tide size, and water clarity. The more the tide pushes food along channel edges and around structure, the more likely you are to intercept decent fish.
Most anglers do best with simple, tide-proof rigs and baits that stay fishing in moving water. You’re usually trying to hold bottom long enough for the scent trail to work while avoiding donating tackle to snags.
This is a tide-led mark: the Bristol Channel range and local flow can be powerful, and the foreshore can change character quickly between low and high water. Picking the right stage of tide often matters more than trying to “fish through” poor conditions.
Grangetown Foreshore is not a ‘set-and-forget’ easy beach: mud, silt, fast-rising water and industrial edges mean you should treat it with respect. If you’re new to the venue, go on a daytime recon at low water before committing to an evening tide.
Facilities are those of an urban/industrial fringe rather than a managed angling venue, so arrive prepared. You’re close to Cardiff amenities, but not necessarily right next to them at the water’s edge.
A bit of local know-how goes a long way here: finding cleaner patches, fishing the right tide stage, and keeping rigs fishing in the run are the keys. Keep an eye on what the water is doing in front of you and adjust quickly rather than waiting for the “planned” approach to work.
Fishing does not appear to be universally banned along the general Grangetown foreshore, but restrictions can apply locally due to port/harbour rules, safety zones, and temporary works. Treat signage and instructions on-site as definitive, and check before you fish if you’re near any operational waterfront.
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