United Kingdom Sloman at English Wikipedia · Public domain
The descent
The entrance, at 247 m.
The real relief above Dan yr Ogof, measured on the Copernicus model every 30 m, and the cave going down at the same vertical scale.
The depth is the one published by those who explored it; the shape of the galleries is a sketch, not a survey. No depth has been published for this cave yet.
17km
Galleries
surveyed length (Wikidata)
247m
Entrance altitude
from the 30 m relief model
9°C
Inside, all year
the yearly average outside, at the entrance
269m
Rock above
the highest point within 1.5 km
Inside and outside
9 °C inside, all year.
Deep inside, a cave keeps the average temperature of the year outside: about 9 °C here, in January and in August. In July the afternoon reaches 19 °C at the entrance, 10 °C warmer than inside: take a jacket.
- 6°2°Jan
- 6°1°Feb
- 8°2°Mar
- 11°4°Apr
- 15°6°May
- 17°9°Jun
- 19°11°Jul
- 18°11°Aug
- 16°9°Sep
- 13°7°Oct
- 9°4°Nov
- 6°2°Dec
Outside: afternoon and night averages for 1991–2020 (NASA POWER) brought to the altitude of the entrance. Inside: the yearly average, which deep parts of a cave keep. Near the entrance it follows the weather a little.
Cave system in Wales, United Kingdom
Dan yr Ogof is a show cave in United Kingdom. It has 17 km of surveyed galleries. The entrance is at 247 m. It has stalactites and stalagmites and several entrances and long galleries. It is open to visitors.
Getting there.
- Show cave: open to visitorsticket requiredOfficial site↗
- Seven Sistersnearest town · 7.4 km in a straight line
- Parking 180 m awaynearest car park in OpenStreetMap, straight line
- Viewpointsnearest viewpoint · 2.9 km from the entrance
- Cardiff International Airport (CWL)nearest airport with scheduled flights · 54 km in a straight lineCar hire at CWL airport (Cardiff)Discover Cars · sponsored link↗
Plan the visit
Guided tours, a bed nearby, a car.
Some links above are affiliate links: if you book through them we may earn a commission, at no extra cost to you. It never changes what the data on this page says.
From above.
The ground above the cave, with the relief shaded, the line of the section and what people have mapped around the entrance.
N
1.5 km
Sentinel-2 cloudless 2016 (EOX, CC BY 4.0), 6.0 × 6.0 km, north up. The line is the section above. Points © OpenStreetMap contributors.
Around the entrance.
- 5other cave entrances within 3 kmOgof y nos hir, Ogof Ffynnon Ddu (OFD) top entrance, Cwm Dwr (OFD), Dan-Yr-Ogof and 2 more
- 2sinkholes within 3 kmSinc y Giedd, Pwll y Cawr shake hole
- 1viewpoints within 3 km
- 2marked hiking routes within 3 kmBeacons Way, Cambrian Way
- 1named waterfalls within 4 kmSgwd Ddu
- 7car parks within 2 km
- 8bus stops within 2 km
- 4campsites within 8 kmBrecon Beacons Camping & Caravan Park, Cae Glas Camping, Brecon Beacons Caravan Touring Park and 1 more
- 4hotels and guesthouses within 8 kmHeronstone Holiday Retreat, Ynyscedwyn Arms Hotel, Ancient Briton and 1 more
- 2restaurants and cafés within 3 km
- springs within 2 km
- caving clubs and spots within 15 km
- climbing crags within 3 km
- information boards and visitor centres within 3 km
Counted in OpenStreetMap, the map anyone can edit, around the entrance. A low number may just mean nobody has mapped it yet. © OpenStreetMap contributors (ODbL).
Towns nearby
- Seven Sisters7.4 km in a straight line
- Ystalyfera9.6 km in a straight line
- Glyn-neath10 km in a straight line
- Crynant12 km in a straight line
- Brynamman13 km in a straight line
- Resolven13 km in a straight line
- Hirwaun16 km in a straight line
- Glanamman17 km in a straight line
In our other atlases
What else is around Dan yr Ogof.
The river at the entrance, the waterfalls, the lakes, the mountains and volcanoes above, the canyons, beaches and islands nearby — from our other atlases.
Lakeyas1 lakes within 10 km
Peakyas34 mountains within 10 kmFigures from the sister sites' databases (Wikidata, HydroATLAS, GeoNames, NOAA, OpenStreetMap). Links open when each site is online.
Month by month
The weather outside, at the entrance.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Afternoon | 6 | 6 | 8 | 11 | 15 | 17 | 19 | 18 | 16 | 13 | 9 | 6 |
| Afternoon | 6 | 6 | 8 | 11 | 15 | 17 | 19 | 18 | 16 | 13 | 9 | 6 |
| Night | 2 | 1 | 2 | 4 | 6 | 9 | 11 | 11 | 9 | 7 | 4 | 2 |
| Rain (mm) | 128 | 99 | 90 | 71 | 85 | 93 | 102 | 107 | 89 | 131 | 134 | 141 |
| Rainy days | 19 | 16 | 16 | 15 | 15 | 15 | 17 | 18 | 16 | 18 | 20 | 19 |
| Sun hours/day | 1.5 | 2.5 | 4.0 | 5.7 | 6.4 | 6.3 | 5.9 | 5.1 | 4.7 | 2.8 | 1.7 | 1.2 |
| Snow on the ground (cm) | 6 | 6 | 4 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 4 |
| Afternoon | Afternoon | Night | Rain (mm) | Sun hours/day | |
|---|---|---|---|---|---|
| Jan | 6 | 6 | 2 | 128 | 1.5 |
| Feb | 6 | 6 | 1 | 99 | 2.5 |
| Mar | 8 | 8 | 2 | 90 | 4.0 |
| Apr | 11 | 11 | 4 | 71 | 5.7 |
| May | 15 | 15 | 6 | 85 | 6.4 |
| Jun | 17 | 17 | 9 | 93 | 6.3 |
| Jul | 19 | 19 | 11 | 102 | 5.9 |
| Aug | 18 | 18 | 11 | 107 | 5.1 |
| Sep | 16 | 16 | 9 | 89 | 4.7 |
| Oct | 13 | 13 | 7 | 131 | 2.8 |
| Nov | 9 | 9 | 4 | 134 | 1.7 |
| Dec | 6 | 6 | 2 | 141 | 1.2 |
Averages 1991–2020 (NASA POWER) for a cell about 55 km wide, brought to the altitude of the entrance (247 m) with the standard lapse rate. Not a forecast.
Recent years
Wet years, dry years.
Rain of each month as a share of the 1991–2020 average. A dry year means a lower river and hotter rock; a wet one, more water in the gorge.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2020 | 106% | 282% | 118% | 71% | 20% | 160% | 112% | 138% | 78% | 150% | 93% | 165% |
| 2021 | 153% | 160% | 93% | 24% | 233% | 47% | 88% | 68% | 114% | 166% | 39% | 107% |
| 2022 | 42% | 171% | 52% | 60% | 86% | 83% | 48% | 38% | 121% | 105% | 136% | 79% |
| 2023 | 112% | 25% | 194% | 136% | 40% | 51% | 139% | 99% | 129% | 123% | 104% | 168% |
| 2024 | 93% | 183% | 155% | 174% | 101% | 48% | 99% | 83% | 137% | 98% | 73% | 93% |
| 2025 | 107% | 96% | 30% | 105% | 49% | 125% | 58% | 51% | 188% | 93% | 135% | 134% |
130% or more: wet month 70% or less: dry month
Caves nearby.
Dan yr Ogof
United Kingdom
- —Depth
- 17 kmGalleries
- 247 mEntrance altitude
- 9 °CInside, all year
Ogof Ffynnon Ddu
United Kingdom · 2 km
- —Depth
- —Galleries
- 351 mEntrance altitude
- 8 °CInside, all year
Cathole Cave
United Kingdom · 40 km
- —Depth
- —Galleries
- 37 mEntrance altitude
- 11 °CInside, all year
Gough's Cave
United Kingdom · 88 km
- —Depth
- —Galleries
- 67 mEntrance altitude
- 10 °CInside, all year
Where these figures come from
| Name, type, published depth and length, visitors | Wikidata (Q3405158) · CC0 |
|---|---|
| The relief above, the entrance altitude, the section and the 3D model | Copernicus DEM GLO-30 · © DLR e.V., © Airbus Defence and Space GmbH, Copernicus/ESA |
| Climate | NASA POWER, 1991–2020 |
| Entrances, springs, sinkholes, opening hours and what is around | © OpenStreetMap contributors · ODbL |
| Images | EOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons |
| Rivers, waterfalls, lakes, mountains, canyons, beaches and islands nearby | Coastya, Lakeyas, Peakyas, Cascadyas, Islandyas, Riveryas |
Every figure is an average, an estimate or a count from a public dataset. Licences and methods: data sources.
The family
Do you prefer beaches, lakes, mountains, waterfalls, islands, rivers, canyons, caves, dark skies, viewpoints, birdwatching or forests?
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