Lough Tay is one of those places that stops you in your tracks. Sitting in a hollow of the Wicklow Mountains, the lake’s dark water contrasts so sharply with the white sandy beach and the rolling green hills above it that the whole scene looks almost unreal. People call it Guinness Lake, and once you see it, the nickname makes perfect sense.
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It is one of the most photographed spots in Ireland, and it draws visitors from all over the world. But it is also the kind of place that rewards those who know a little of its history and take the time to visit properly. This guide covers everything you need to know before you go.
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Why Is It Called Guinness Lake?
The Guinness Lake nickname comes from the lake’s striking appearance. The water at Lough Tay is dark — almost black in certain lights — due to the peat content of the surrounding bogland. Combined with the white sandy beach at the northern end, the overall image resembles a pint of Guinness stout: dark body, creamy white head. It is a comparison that Irish people have made for generations, and it has stuck.
The connection to the Guinness name goes beyond just the look, however. The lake and the surrounding Luggala Estate were owned by the Guinness family for decades. The estate came to Oonagh Guinness in 1937, when her father Arthur Ernest Guinness bought it as a wedding gift for her second marriage, and it remained in the Guinness family until relatively recently. The house on the estate — Luggala Lodge — hosted some of the most famous names in Irish cultural and artistic life throughout the mid-twentieth century, including writers, musicians, and filmmakers. Garech de Brún, Oonagh’s son, was a well-known patron of traditional Irish music and a founder of Claddagh Records.
Where Exactly Is Lough Tay?
Lough Tay sits in the Wicklow Mountains, roughly 40 kilometres south of Dublin city centre. The nearest village is Roundwood, which is about 5 kilometres to the south-east. The lake sits in the valley of Luggala, flanked by Luggala Mountain (595 metres) and Djouce Mountain (725 metres).
The main viewpoint, and the one you see in most photographs, is accessible from the R759 road. There is a small layby on the roadside where you can pull over and look down into the valley. It is not a large viewing area, so if you arrive at peak times — summer weekends, bank holidays — you may need to wait for a space.
The coordinates for the viewpoint are approximately 53.1060° N, 6.2668° W. If you are using Google Maps or a sat-nav, search for “Lough Tay Viewpoint, Wicklow” and it will take you to the right spot on the R759.
Getting There from Dublin
By car, Lough Tay is around one hour from central Dublin, depending on traffic. The most direct route takes you south through Enniskerry and into the Wicklow Mountains via the Sally Gap — a high mountain pass road that is worth driving for its own sake. The road through the Sally Gap is narrow in places and can be slow, but the views are exceptional.
An alternative approach is via Roundwood. This route is slightly easier to drive but gives you less of the mountain scenery along the way. Many visitors combine both: come via the Sally Gap for the dramatic approach and return via Roundwood for a change of route.
There is no regular public transport to Lough Tay. The 65 bus from Dublin runs to Blessington, and from there you would need a taxi or hire car. For most people visiting specifically for the lake, a car is the practical choice. Cycling is possible — the route from Enniskerry is well-used by cyclists — but the roads are steep and narrow in sections.
What to Expect When You Arrive
The famous viewpoint is a roadside layby. There are no facilities — no toilets, no café, no visitor centre. The view itself is free and accessible at any time of day. You look down into the valley from a height of around 200 metres, which gives you that classic aerial perspective of the lake with its sandy beach and the wooded slopes of the Luggala Estate.
You cannot access the beach or the lakeshore directly from the viewpoint. The Luggala Estate is private land. In the past, the owner Garech de Brún was relatively accommodating about walkers entering the estate through certain routes, but since the estate changed hands after his death in 2018, access arrangements have shifted. Always check the current situation before attempting to walk onto the estate land.
What you can do is walk on the open mountainside above the viewpoint. The slopes of Knocknacloghoge offer a straightforward walk with excellent views down over the lake. This is common land under Ireland’s right-of-way arrangements for upland areas, though you should stick to the established paths and respect any livestock in the area.
Planning a trip to Wicklow? We cover the best routes, stops, and hidden spots every week.
The Best Time to Visit
Lough Tay looks different in every season, and there is no single “best” time — it depends what you are after.
Summer (June–August) gives you the longest days and the warmest weather, but the viewpoint can get very busy, especially at weekends. Early mornings — before 9am — are significantly quieter. The light in summer can be harsh in the middle of the day, so early morning or evening visits tend to produce better photographs.
Autumn (September–October) is many people’s favourite time. The surrounding hillsides take on shades of bronze and amber, the crowds thin out noticeably, and the light is softer. September in particular can deliver clear, crisp days with excellent visibility across the mountains.
Winter (November–February) is quiet, cold, and occasionally dramatic. On clear winter days the light is exceptional, and if there is snow on the surrounding peaks the scene is remarkable. The mountain road through the Sally Gap can be icy or closed in severe weather, so check conditions before you travel.
Spring (March–May) brings fresh green to the hillsides as the heather and bracken regrow after winter. It can be unpredictable weather-wise, but the lower visitor numbers and the sharpness of the new growth make it well worth considering.
Lough Tay’s Role in Film and Television
Lough Tay has appeared in several notable productions over the years. Most famously, it was used as the filming location for the fictional Viking settlement of Kattegat in the television series Vikings, where its dark water and dramatic surrounding mountains gave the lake the bleak, imposing look the show required.
It has also featured in various documentaries about Ireland and in commercial photography for tourism campaigns. The lake’s visual impact makes it a natural choice for anyone looking to represent dramatic Irish landscape.
What Else to See Nearby
Lough Tay sits within the Wicklow Mountains National Park, and there is a great deal to see and do in the surrounding area. A few highlights worth combining with your visit:
- Glendalough — about 20 kilometres to the south-west, the monastic settlement at Glendalough is one of Ireland’s most visited historic sites. The round tower, the ruins of the cathedral, and the two lakes in the valley make for a half-day visit at minimum.
- The Sally Gap — the high mountain road to the north, which many visitors use to approach Lough Tay from Dublin. Stop at the crossroads for views across the Wicklow uplands.
- Roundwood — the nearest village, about 5 kilometres away. It has a few pubs and places to eat. The village claims to be the highest in Ireland, though this is disputed. Whether or not the claim holds up, it is a pleasant stop.
- Glenmacnass Waterfall — an 80-metre waterfall on the Glenmacnass River, accessible from a roadside layby on the R115. It is about 10 kilometres from Lough Tay and a quick stop on any mountain route through Wicklow.
- Powerscourt Estate and Gardens — to the north, near Enniskerry, the gardens at Powerscourt are among the most impressive in Ireland. The estate also has a waterfall — at 121 metres, often cited as one of Ireland’s highest — a short drive from the main house.
Practical Tips Before You Go
- Parking: The layby at the viewpoint holds only a handful of cars. In busy periods, you may need to park further along the road and walk back. Do not block passing places on the narrow mountain roads.
- Mobile signal: Coverage in the Wicklow Mountains can be patchy. Download offline maps before you leave, and let someone know your plans if you intend to walk on the open hillside.
- Weather: Mountain weather in Ireland changes quickly. Even in summer, bring a waterproof layer. The wind on the exposed ridge above the lake can be strong year-round.
- Facilities: There are none at the viewpoint itself. The nearest toilets and food are in Roundwood. Plan accordingly.
- Photography: The best angle is from the viewpoint looking south-west into the valley. Early morning gives you softer light and fewer other visitors in shot. A wide-angle lens or the standard wide setting on a phone camera works well for capturing the full scene.
Lough Tay is one of those places that lives up to its reputation. The photographs look almost edited, but the real thing is just as striking. It takes less than an hour from Dublin, costs nothing to visit, and fits easily into a day’s driving through Wicklow. If you are putting together an Ireland itinerary and you have not included it yet, it deserves a place on the list.
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