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5.7 · Estuary · East Sussex
Cuckmere Haven is a tidal river-mouth and shingle beach mark beneath the Seven Sisters, reached on foot from the Cuckmere Valley/Seven Sisters car parks via the riverside path. Fishing is best around the estuary mouth and adjoining beach on a flooding or ebbing tide, with bass, flounder and mullet the main attractions; open-beach summer species and winter whiting also show, but strong tides, soft mud and surf can limit comfortable fishing.
Today · Best window
Best window: 06:00-09:00 around the rising tide
Most likely species: Flounder and Mullet (Thin-lipped)
Good conditions. Best around 06:00-09:00 around the rising tide. Good chance of Flounder and Mullet (Thin-lipped).
Worth fishing if you can hit the best window.
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 13–19, 2026
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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.
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Choose when you're free and what you want to catch. We'll show the best tide, weather window and method for this mark.
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Jump to towns around this mark for more marks and guides.
Explore nearby towns: Seaford · East Dean and Friston · Alfriston · Newhaven · Lower Willingdon
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Forecast tuning currently supports Bass and Mackerel — more species are on the way.
Fish forecast key
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.
Cuckmere Haven is a scenic but exposed shingle-beach and estuary-mouth mark beneath the Seven Sisters, where the River Cuckmere meets the English Channel. It can produce varied fishing, particularly for summer bass and mullet, with flounder and mixed winter beach species possible when conditions suit.
The beach is reached from the Exceat/Cuckmere Valley area, with the final approach normally being a walk along the signed riverside or valley paths to the sea. It is not a drive-to-the-water mark, so pack lightly and allow time for the return journey.
Cuckmere Haven offers a credible mix of Sussex beach and estuary species, although catches vary greatly with season, sea state and the amount of freshwater coming down the river. Bass and mullet are the headline summer targets, while the colder months can bring the usual mixed beach fishing.
A standard beach-fishing approach works well here, but lighter, more mobile tactics can be more effective than simply casting as far as possible. Match the method to the water: surf and colour favour scent and movement, while clear calm water rewards discreet presentation.
The most productive periods are commonly around the change of tide and the first part of the flood, but the river mouth can create strong, awkward water on either tide. Conditions matter more than a fixed timetable: a little colour and wave action can improve bass fishing, while calm clear water is better for mullet and lure fishing.
Cuckmere Haven is an exposed natural beach rather than an accessible promenade mark. The main risks are the steep mobile shingle, fast-changing tide around the river mouth, surf, cliff falls and the isolated feel of the beach outside busy hours.
Facilities are limited at the fishing area itself, so anglers should arrive self-sufficient. The nearest useful amenities are normally back inland around Exceat and the Cuckmere Valley access points.
The best local approach is to travel light, watch the water before setting up, and be prepared to move a short distance if the current, weed or beach traffic makes one spot unfishable. The mouth is visually obvious, but the most comfortable and productive water is not always directly in the strongest flow.
Sea angling from the beach is not known to be universally prohibited at Cuckmere Haven, but this is a sensitive, heavily visited landscape with conservation designations and local management rules. Anglers should treat access as conditional on current signs, site rules and any temporary restrictions.
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