Vietnam Show cave World Heritage
Phong Nha Cave
26 °C inside, all year.
Genghiskhan · CC BY-SA 3.0
The descent
The entrance, at 3 m.
The real relief above Phong Nha Cave, 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.
3m
Entrance altitude
from the 30 m relief model
26°C
Inside, all year
the yearly average outside, at the entrance
324m
Rock above
the highest point within 1.5 km
Inside and outside
26 °C inside, all year.
Deep inside, a cave keeps the average temperature of the year outside: about 26 °C here, in January and in August. In May the afternoon reaches 34 °C at the entrance, 8 °C warmer than inside: take a jacket. The best months to escape the heat are from March to November.
- 24°16°Jan
- 27°17°Feb
- 30°20°Mar
- 33°22°Apr
- 34°24°May
- 33°25°Jun
- 32°25°Jul
- 32°25°Aug
- 31°24°Sep
- 29°23°Oct
- 27°21°Nov
- 24°18°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 in Vietnam
Phong Nha Cave is a show cave in Vietnam. The entrance is at 3 m. It has stalactites and stalagmites. It is open to visitors. It lies within Phong Nha–Ke Bang National Park. It is part of a UNESCO World Heritage site.
Getting there.
- Show cave: open to visitorsticket required
- Xuân Sơnnearest town · 5.3 km in a straight line
- Sunset spotnearest viewpoint · 2.3 km from the entrance
- Dong Hoi Airport (VDH)nearest airport with scheduled flights · 34 km in a straight lineCar hire in Nakhon PhanomDiscover 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.
- 4other cave entrances within 3 kmĐộng Phong Nha, Động Tiên Sơn, Hang Tối and 1 more
- 2viewpoints within 3 kmĐiểm Ngắm Cánh Viewpoint, Sunset spot
- 1named waterfalls within 4 kmThâc Gîo
- 1information boards and visitor centres within 3 km
- 87hotels and guesthouses within 8 kmPhong Nha I Hotel, Thành Đạt, Phương Nam and 84 more
- 19restaurants and cafés within 3 km
- springs within 2 km
- sinkholes within 3 km
- caving clubs and spots within 15 km
- marked hiking routes within 3 km
- climbing crags within 3 km
- car parks within 2 km
- bus stops within 2 km
- campsites within 8 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
- Xuân Sơn5.3 km in a straight line
- Ba Đồn24 km in a straight line
Month by month
The weather outside, at the entrance.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Afternoon | 24 | 27 | 30 | 33 | 34 | 33 | 32 | 32 | 31 | 29 | 27 | 24 |
| Afternoon | 24 | 27 | 30 | 33 | 34 | 33 | 32 | 32 | 31 | 29 | 27 | 24 |
| Night | 16 | 17 | 20 | 22 | 24 | 25 | 25 | 25 | 24 | 23 | 21 | 18 |
| Rain (mm) | 36 | 23 | 41 | 60 | 122 | 111 | 192 | 233 | 345 | 379 | 140 | 79 |
| Rainy days | 8 | 6 | 8 | 10 | 18 | 19 | 21 | 24 | 23 | 21 | 16 | 12 |
| Sun hours/day | 1.8 | 3.0 | 3.2 | 4.8 | 6.4 | 6.4 | 5.8 | 5.1 | 4.4 | 3.0 | 2.3 | 1.0 |
| Afternoon | Afternoon | Night | Rain (mm) | Sun hours/day | |
|---|---|---|---|---|---|
| Jan | 24 | 24 | 16 | 36 | 1.8 |
| Feb | 27 | 27 | 17 | 23 | 3.0 |
| Mar | 30 | 30 | 20 | 41 | 3.2 |
| Apr | 33 | 33 | 22 | 60 | 4.8 |
| May | 34 | 34 | 24 | 122 | 6.4 |
| Jun | 33 | 33 | 25 | 111 | 6.4 |
| Jul | 32 | 32 | 25 | 192 | 5.8 |
| Aug | 32 | 32 | 25 | 233 | 5.1 |
| Sep | 31 | 31 | 24 | 345 | 4.4 |
| Oct | 29 | 29 | 23 | 379 | 3.0 |
| Nov | 27 | 27 | 21 | 140 | 2.3 |
| Dec | 24 | 24 | 18 | 79 | 1.0 |
Averages 1991–2020 (NASA POWER) for a cell about 55 km wide, brought to the altitude of the entrance (3 m) with the standard lapse rate. Not a forecast.
Photographs
Inside and around.
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 | 225% | 197% | 177% | 135% | 83% | 29% | 35% | 135% | 60% | 415% | 225% | 145% |
| 2021 | 98% | 181% | 125% | 271% | 58% | 248% | 156% | 37% | 227% | 241% | 100% | 128% |
| 2022 | 109% | 271% | 243% | 274% | 172% | 72% | 126% | 90% | 161% | 146% | 198% | 180% |
| 2023 | 151% | 140% | 77% | 94% | 89% | 84% | 78% | 66% | 108% | 196% | 193% | 342% |
| 2024 | 231% | 76% | 136% | 12% | 165% | 100% | 77% | 35% | 193% | 166% | 231% | 164% |
| 2025 | 128% | 290% | 126% | 144% | 134% | 378% | 99% | 257% | 127% | 173% | 329% | 128% |
130% or more: wet month 70% or less: dry month
Caves nearby.
Phong Nha Cave
Vietnam
- —Depth
- —Galleries
- 3 mEntrance altitude
- 26 °CInside, all year
Thien Duong Cave
Vietnam · 9 km
- —Depth
- —Galleries
- 253 mEntrance altitude
- 24 °CInside, all year
Son Doong Cave
Vietnam · 14 km
- —Depth
- —Galleries
- 390 mEntrance altitude
- 23 °CInside, all year
Hang Én (swift cave)
Vietnam · 17 km
- —Depth
- —Galleries
- 188 mEntrance altitude
- 24 °CInside, all year
Where these figures come from
| Name, type, published depth and length, visitors | Wikidata (Q3395915) · 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 |
Every figure is an average, an estimate or a count from a public dataset. Licences and methods: data sources.
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