Sussex is a haven for dog owners, with its vast coastlines, serene rivers, and picturesque lakes. Whether you’re near the bustling shores of Brighton or the calm riversides near the South Downs, Sussex offers some beautiful, dog-friendly swimming spots. Here are five places in Sussex to take your dog, with the swimming rules and hazards we could confirm. Not every spot here is for a swim, and we say which. List of dog swimming spots around UK can be found here.
1. Cuckmere Haven
Nestled between the South Downs National Park and the sea, Cuckmere Haven is a stunning estuary where the Cuckmere River meets the English Channel. This spot has been a natural landmark for centuries, its meandering oxbow lakes a result of natural river flow and historical changes in the coastline.
For dogs, Cuckmere Haven offers plenty of beach space to run, but take care at the river mouth itself — the South Downs National Park Authority warns that where the river meets the incoming tide, currents can be fast-flowing, deep and unpredictable, and there are no lifeguards. Stick to the shallow margins away from the river mouth if your dog wants a paddle. The pebbled beach and nearby grassy banks are perfect for a day of exploring. The surrounding South Downs landscapes create a beautiful backdrop, making it a scenic adventure for both you and your furry friend.
What’s nearby: Parking is available near the Seven Sisters Country Park, and there are a few cafes along the way for a refreshing treat.
Find it: Cuckmere Haven
2. Tilgate Park Lake
Tilgate Park in Crawley is a sprawling park with over 200 acres of woodlands, gardens, and lakes. Originally part of a private estate dating back to the 17th century, Tilgate Park was purchased by Crawley Borough Council and transformed into a public park in the mid-20th century. Today, the park is a beloved spot for locals and visitors alike, with a lake that is better for a lead walk than a swim.
The lake has shallow edges, but there’s no free-swim zone here. Crawley Borough Council’s Public Space Protection Order (renewed June 2025) requires dogs to be kept on a lead, no longer than 2 metres, at all times around the lake — only assistance dogs are exempt. Rules like this are set locally rather than nationally — our guide sets out where you do and do not have to use a lead. The Tilgate Nature Centre nearby also offers a look at local wildlife and is worth a visit after your walk.
Locate it: Tilgate Park
3. West Wittering Beach
West Wittering Beach, located on the Manhood Peninsula near Chichester, is a long stretch of sandy coastline with shallow waters. This beach has been popular since the Edwardian era, attracting beachgoers from all over the UK. It is run by West Wittering Estate, which describes its bathing zone as Blue Flag.
There is a seasonal restriction. The estate’s website says dogs are excluded from the main swimming beach, between groynes 14a and 18 in front of the beach huts, from the start of May (its FAQ page) or mid-May (its activities page) until mid-September, so check with the estate for the exact date. Dogs are welcome elsewhere on the beach, and on the whole beach from mid-September to April. The estate asks you to keep your dog under control, to clear up after it and to look for signs at the beach entrances, and never to leave dogs in a car on a warm day.
Good to know: On-site parking, toilets, and a café provide convenient facilities, and there’s a nearby nature reserve for more adventure.
Get directions: West Wittering Beach
4. Arlington Reservoir
Arlington Reservoir, situated in East Sussex near the village of Arlington, is a beautiful spot for dog owners who want a peaceful day outdoors. This reservoir, built in the 1960s to provide water to the area, has since become a popular recreational area and a designated Local Nature Reserve.
South East Water’s own guidance is clear: swimming in the reservoir is dangerous and strictly prohibited, so this isn’t a spot for a dip. Dogs must be kept on a lead at all times here, but the trails looping around make for a lovely scenic walk while you enjoy views of the surrounding Sussex countryside. Birdwatchers will also appreciate the variety of species in the area, adding an educational aspect to your outing.
Nearby: Limited parking is available near the reservoir, and there are several nearby pubs and cafes for refreshments.
Map: Arlington Reservoir
5. Barcombe Mills
Barcombe Mills, on the River Ouse, is a popular riverside spot for picnics and paddling in Sussex. It is a former milling site, and the weirs and locks are still part of this picturesque location.
Dogs can enjoy the shallow margins and open spaces along the riverbanks, but check the water first. Local press reports based on Environment Agency data have described repeated sewage discharges from a treatment works on the Bevern Stream, which joins the Ouse just upstream (62 spills lasting nearly 500 hours in 2021, according to the Mid Sussex Times), and a local campaigner has said it is not always safe to swim there. As far as we could tell it is not a designated bathing water, and we haven’t checked current water quality. Look for Southern Water’s Beachbuoy alerts, keep your dog out of the water if in doubt, and speak to your vet if your dog seems unwell after a dip.
Handy to know: Parking is available nearby, and there are picnic benches along the river.
Pin it: Barcombe Mills
Essentials for Your Dog’s Swimming Day
Make the most of your Sussex outing with these essentials:
- A long line: the open downland above Cuckmere and the unfenced banks at Barcombe Mills mean there’s nothing to stop a dog running further than you’d like — a gadget won’t change that, but a 5–10 metre long line will, giving him real freedom to explore while his recall is still a work in progress. Most of our training bits come from Calmshops.
- Fresh water and a bowl: a dog that has been in the Channel will be thirsty, and sea water is the last thing he should be drinking.
- Towel: For drying off after a swim, a towel is essential, especially if your dog loves rolling in the grass afterwards!
From riverside mills to beaches and lakes, Sussex is a lovely place to get outdoors with your dog, though not every spot here is for swimming. Cuckmere has a current hazard at the river mouth, Tilgate and Arlington are lead walks only, and West Wittering has a summer restriction. Whichever spot you choose, avoid water with a green scum on it. Make it a day trip and enjoy the beauty of Sussex alongside your furry companion. Keep a Sussex vet in mind before you set out, and if your dog is not yet reliable off-lead near open water, we list trainers separately for East Sussex and West Sussex. For a proper wash and brush-out afterwards, our UK dog groomers database covers Sussex too.
Frequently Asked Questions
What makes Cuckmere Haven a good swimming spot for dogs?
Cuckmere Haven offers plenty of beach space for dogs to run, but care is needed at the river mouth — the South Downs National Park Authority warns of fast-flowing, deep and unpredictable currents where the river meets the tide, with no lifeguards on site. The pebbled beach and grassy banks away from the river mouth provide a safer, more scenic environment for a paddle.
Are there any safety considerations for dogs swimming in Tilgate Park Lake?
Yes — Crawley Borough Council’s Public Space Protection Order (renewed June 2025) requires dogs to be kept on a lead, no longer than 2 metres, at all times around Tilgate Park Lake, with no free-swim zone. Only assistance dogs are exempt.
Can dogs swim off-lead at West Wittering Beach throughout the year?
Not on the main swimming beach in summer. The West Wittering Estate says dogs are excluded between groynes 14a and 18 from May (its pages give the start as 1 May or mid-May) until mid-September, are welcome elsewhere on the beach, and are welcome everywhere from mid-September to April. Check with the estate for the exact date and look for signs at the entrances.
What amenities are available near Cuckmere Haven for dog owners?
Near Cuckmere Haven, parking is conveniently available close to Seven Sisters Country Park. Additionally, there are several cafes along the route where owners can grab refreshments, making it an easy and pleasant day out with your dog.
Is Tilgate Park suitable for dogs of all swimming abilities?
Tilgate Park Lake doesn’t have a free-swim area — Crawley Borough Council’s PSPO requires dogs on a lead (max 2 metres) at all times around the lake. It’s still a lovely spot for a lead walk with your dog, just not for a swim.
