Llanddwyn Island (Ynys Llanddwyn) is the most photographed corner of Anglesey, and the question everyone asks before they go is the same: can you actually walk to it? The short answer is yes, most of the time. The longer answer is the reason this guide exists — because “most of the time” is not “always”, and the people who get caught out are the ones who never checked.
Walking more of the coast? Llanddwyn sits on Stage 9 of the Anglesey Coastal Path. Our free printable Coastal Path checklist maps all 12 stages on one A4 sheet — tick them off, track your miles, and sign the certificate when you finish.
Where it is and how to reach the start
Llanddwyn sits at the western end of Newborough Beach (Traeth Niwbwrch), behind the pine forest on Anglesey’s southwest coast. There’s no separate car park for the island itself — you park at the Newborough Forest beach car park (postcode LL61 6SG, ANPR cashless, £5 for 2 hours or £15 all day) and walk.
From the car park it’s a flat half-mile across firm sand to the neck of the island. Allow 15–20 minutes each way on the beach, longer if the tide has pushed you up onto the soft dry sand. For the full route and what to expect underfoot, see our Llanddwyn Island walk listing.
When is Llanddwyn cut off by the tide?
Llanddwyn is only separated from the beach around the highest spring tides — roughly the top of the tidal range, for an hour or two either side of high water. For most of the month, on most tides, the sandy neck stays dry and you can walk across without getting your feet wet.
The risk isn’t being stranded on the island for the night — it’s the crossing flooding while you’re out there on a big spring tide, leaving you to wade back or wait. Check the tide times for Newborough or Llanddwyn before you set off, and if high water lands within an hour of your visit on a spring tide, time your walk for the falling tide instead. Tide tables for the area are published by the UK Hydrographic Office and most weather apps.
What you’ll find on the island
Llanddwyn rewards the walk. The island is a long finger of ancient volcanic rock — pillow lava formed underwater hundreds of millions of years ago — and the path runs its length past a string of landmarks:
- Tŵr Mawr, the squat white lighthouse at the tip, built in 1845 and modelled on the windmills of Anglesey. This is the one in every photograph, with the Llŷn Peninsula and the Eryri (Snowdonia) peaks behind it.
- Tŵr Bach, the older, smaller beacon nearer the church.
- The ruins of St Dwynwen’s church — Dwynwen is the Welsh patron saint of lovers, which is why couples make the pilgrimage on 25 January, the Welsh St Valentine’s Day.
- The pilots’ cottages, restored to show how the harbour pilots who guided ships into the Menai Strait once lived. They’re sometimes open in summer.
Grey seals haul out on the rocks off the southern shore, and on a clear evening this is one of the finest places on the island to watch the sun go down behind the mountains.
Practical tips
- Dogs are welcome on Newborough Beach and the island year-round.
- There are no facilities, no café, and no shelter on the island — bring water and a layer, as the wind comes straight off the Irish Sea.
- Wear shoes you don’t mind getting sandy; the neck can hold shallow water even on a normal tide.
- Combine it with the Newborough Forest loop for red squirrels in the pines, or read our ranked guide to the best beaches on Anglesey to plan a full coastal day.
Go in the early morning or the last hour before sunset, check the tide, and Llanddwyn will give you the version of Anglesey that ends up on the fridge door for years.