Phong Nha CaveAbout Phong Nha Cave
Phong Nha Cave is a river cave within the Phong Nha-Ke Bang karst national park in Quang Binh Province, central Vietnam, and forms part of a UNESCO-listed karst landscape. It is notable for an underground river and large inner caverns.
The visitor route is built around a boat trip on the cave’s underground river that reaches a series of caverns with stalactites and stalagmites, and illuminated chambers accessible from the jetty. The site is commonly paired with visits to nearby show caves and park trails that explore the karst landscape.
The cave and surrounding karst were known locally for centuries and were surveyed and mapped by scientific teams in the 20th and 21st centuries; the area became protected as part of a national park and a UNESCO World Heritage listing for its extensive karst systems.
The cave lies near the village of Phong Nha in Quang Binh Province, in central Vietnam’s inland karst region, and is reached by road from the provincial capital and coastal towns.
- Boat access: Visitors travel by small boat along the cave’s underground river to view large chambers and speleothems; tours typically cover the navigable section of the cave.
- Context: The cave is part of the larger Phong Nha-Ke Bang karst massif, and other nearby caves and show caves are commonly visited on the same trip.
Nearby Attractions to Phong Nha Cave
Best Time to Visit Phong Nha Cave
February-August is the best window for stable river and cave access; avoid the wettest months when cave tours may be suspended.
Weather & Climate near Phong Nha Cave
Phong Nha Cave's climate is classified as Tropical Monsoon - Tropical Monsoon climate with hot summers (peaking in June) and mild winters (coldest in January). Temperatures range from 16°C to 32°C. Heavy rainfall (2316 mm/year), wettest in September.
| Month | Comfort | Temp | Feels | Rain | Sky | Humidity | Wind | UV | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | Good | 16° - 22° | 19° | 84 mm | overcast | 87% | 2.2 m/s | 1.0 high | 11.1h |
| February | Very Good | 18° - 23° | 20° | 57 mm | overcast | 85% | 2.4 m/s | 1.3 high | 11.5h |
| March | Very Good | 20° - 26° | 23° | 54 mm | overcast | 82% | 2.1 m/s | 1.4 high | 11.9h |
| April | Very Good | 22° - 30° | 26° | 72 mm | partly cloudy | 79% | 1.9 m/s | 1.8 very high | 12.4h |
| May | Good | 24° - 31° | 31° | 137 mm | overcast | 80% | 2.2 m/s | 2.1 extreme | 12.8h |
| June | Good | 25° - 32° | 34° | 115 mm | overcast | 81% | 2.4 m/s | 2.2 extreme | 13.0h |
| July | Acceptable | 25° - 32° | 34° | 211 mm | overcast | 82% | 2.2 m/s | 2.2 extreme | 12.9h |
| August | Acceptable | 24° - 31° | 33° | 199 mm | overcast | 85% | 2.0 m/s | 2.1 extreme | 12.6h |
| September | Good | 23° - 30° | 27° | 505 mm | overcast | 87% | 1.6 m/s | 1.8 very high | 12.1h |
| October | Good | 22° - 28° | 25° | 461 mm | overcast | 88% | 1.7 m/s | 1.3 high | 11.6h |
| November | Good | 19° - 25° | 22° | 293 mm | overcast | 88% | 2.0 m/s | 1.1 high | 11.2h |
| December | Good | 17° - 23° | 20° | 128 mm | overcast | 88% | 2.2 m/s | 0.9 moderate | 11.0h |
How to Get to Phong Nha Cave
Phong Nha village is about 40 km northwest of Dong Hoi; regular buses and private transfers connect Dong Hoi airport and Da Nang. From Phong Nha town the cave entrances are short boat rides along the Son River.
Tips for Visiting Phong Nha Cave
- Book boat transfers and cave tours in advance during peak season (July-September).
- For Phong Nha Cave, the boat trip on the Son River is integral - choose a tour that includes the river approach for the full experience.
- Wear a light jacket inside certain caves where temperatures can be noticeably cooler.