Phong Nha in March: Spring Warmth, Clear Caves & Jungle Trekking

March is a superb month to visit Phong Nha — temperatures are rising pleasantly, all caves are open, and the national park’s jungle is lush and green after the brief winter cool. Visitor numbers remain manageable before the summer peak.

Weather in Phong Nha in March

• Temperature: 19–29°C (66–84°F)
• Humidity: 81%
• Rainfall: 30% chance of rain; ~4.3 mm avg
• Daylight: 12.0 hours

Best Things to Do in March

• Phong Nha Cave and Paradise Cave
• Hang En Cave: Massive cave chamber with underground camping
• Tu Lan Cave expeditions
• Jungle trekking in Phong Nha-Ke Bang
• Chay River and Dark Cave

Travel Tips for March

• Perfect temperature for multi-day cave trekking expeditions
• Book Son Doong Cave permits well in advance — only 1,000 permits available annually
• Public holidays: No major Vietnamese public holidays in March.
• Crowds: Visitor numbers are manageable — a sweet spot before the summer heat and crowds.
• March’s mild temperatures make multi-day cave treks like Tu Lan genuinely comfortable — the best window before the heat arrives.