Poolbeg Lighthouse

A red lighthouse in Dublin Bay

The bright red Poolbeg Lighthouse stands at the very end of the Great South Wall, a stone breakwater that reaches far out into the mouth of Dublin Bay. Walk out here and you leave the city behind you completely, ending up out in the open water, surrounded by the sea on almost every side. The all-round view takes in the coastline, the bay and the mountains behind it – which makes this one of the most rewarding walks Dublin has to offer, and it costs nothing and needs no booking.

The area sits within the Dublin Bay Biosphere, a UNESCO-recognised biosphere reserve. Even along the wall you'll regularly spot seabirds such as cormorants, herons and gulls, and with a bit of luck seals or dolphins surface further out in the bay. The lighthouse itself is really just the destination – the real appeal is the walk out there and the setting right on the water.

The walk along the Great South Wall

The classic starting point is at the end of Pigeon House Road. From there it's around 1.7 kilometres each way along the top of the wall to the lighthouse, so about 3.4 kilometres there and back. Walking time alone is around 40 minutes, but with photo stops and a pause at the tower you should realistically allow 1 to 1.5 hours. The route is flat, though the surface underfoot needs a bit of care.

The first stretch from the car park is level and easy going, so it works fine with a pushchair or wheelchair too. Further out, the granite and stone surface gets rougher and more uneven – sturdy shoes are a good idea, and essential once it's wet, since the stones get slippery. Dogs are allowed but should stay on a lead for safety, as the wall drops straight into the water on both sides.

One thing worth knowing before you go: the wall is heavily exposed to wind. In storms, strong wind or high swell, waves break right over the top, and the walk becomes dangerous. If conditions look like that when you arrive, skip the wall and stick to the more sheltered stretch of beach instead. Checking the forecast before you set off is worth the two minutes it takes.

The longer route from Sandymount Strand

If you want to make more of a day of it, start from Sandymount Strand instead of the car park. This loop comes to around 10 kilometres and takes about two hours, though it stays flat throughout. It runs from the beach around Irishtown Nature Park, past Ringsend, and only then out along the wall to the lighthouse – a good option if you want to combine the beach, the nature park and some birdwatching with the lighthouse itself.

Irishtown Nature Park is more than just a stretch to pass through. The reclaimed site was once a landfill and is now open grassland and scrub, home to skylarks, linnets, wheatears, herons and, in winter, brent geese. It sits right on the approach to the Great South Wall, so it slots into the longer loop without adding much of a detour.

This route also has the advantage of transport links: Sandymount Strand is easy to reach by public transport, so you don't have to start and finish at the same car park.

Getting there and parking

By car, drive to the end of Pigeon House Road, where there's a free car park. A second, also free, car park (Shelley Banks) is about 650 metres back. Both are small and fill up quickly at weekends – arrive early if you want to be sure of a space, or travel by bus and rail instead.

Without a car, the easiest route is via Sandymount. Sandymount DART station is under 15 minutes' walk from the beach, and bus route 47 stops right at Sandymount Strand; from there you walk through Irishtown, past Ringsend, and on to the wall. City bus route 1 (Sandymount – O'Connell Street – Santry) also serves both Sandymount and Ringsend, getting you closest to the starting point. For how Dublin's ticketing works, see our guides to public transport and the Leap Card.

Food and drink

There are no shops, cafés or toilets on the wall itself, so it's best to bring your own drinks. Public toilets are at the car park by the Martello tower on Sandymount Strand.

For a snack along the way, the Mr Hobbs Coffee van sets up right on the wall at weekends, serving barista coffee and hot chocolate. Sandymount Strand also has a Scoop ice cream stand. For a proper meal, head towards Sandymount and Ringsend, where options include Strand Fare Deli, the Bread 41 bakery and the burger spot BuJo. These are all off the wall itself and make a good finish to the longer beach route.

Best time to visit and wildlife

The wall is open year-round, but the seasons aren't all equal. Autumn through spring is best for birdwatching: pale-bellied brent geese winter in the area around Irishtown, Merrion and Sandymount, and the bay holds internationally significant numbers of wading and water birds. If birdwatching is the goal, aim to visit outside the height of summer.

Sunset is widely considered the best time of day, when the light over the bay and the red tower is at its most striking. There's no lighting on the wall, so plan your return so you're not picking your way over the uneven surface in the dark.

Tower tours and practical information

The interior of the lighthouse isn't open to casual visitors. Getting inside means joining a guided tour, organised by Dublin Port Company and led by Heritage Director Lar Joye. These tours aren't limited to Open House Dublin in September – in 2026, Dublin Port is running a cultural programme from April to October with over 100 events, and the lighthouse is part of it. Programme details and booking run through dublinport.ie/explore.

If you book a tower tour, expect several narrow, steep staircases on the way up; sturdy footwear is required, and a hard hat and hi-vis vest are provided. This makes the tower unsuitable for anyone with limited mobility. No official, permanently bookable 2026 price could be confirmed – Open House programme events are often free, so it's worth checking current details directly with the organiser.

For general visitor information, Visit Dublin (visitdublin.com) is the first port of call; for the lighthouse tower tours, Dublin Port Company (dublinport.ie/explore) is responsible. If you'd like to combine the trip with other spots around the bay, see our overview of Dublin's parks and green spaces.