Mekong Delta in September: Late Flood Season, Floating Villages & Mid-Autumn Festival

September marks the late flood season in the Mekong Delta — water levels remain high, the floating season continues in full swing, and the Mid-Autumn Festival (Tết Trung Thu) brings lantern processions and mooncake markets to towns and riverside communities. Conditions begin improving toward month’s end as the dry season approaches.

Weather in the Mekong Delta in September

• Temperature: 24–30°C (75–86°F)
• Conditions: Rain easing slightly from August; still frequent afternoon showers
• River: Still near peak levels; flood plains remain submerged
• Humidity: 80–85%

Why Visit the Mekong Delta in September

• Mid-Autumn Festival (Tết Trung Thu) — lanterns and mooncakes at Can Tho and riverside communities
• Authentic flood season experience with improving conditions
• Low prices and few tourists
• Seasonal fish and fresh produce at its most abundant

Best Things to Do in September

• Mid-Autumn Festival: Lantern parades and mooncake markets in Can Tho, My Tho, and Vinh Long
• Flood plain boat tours: Floating villages and flooded rice plain views
• Cai Rang Floating Market: Morning visits
• Khmer community festivities: Tra Vinh and Soc Trang celebrations

Travel Tips for September

• Mid-Autumn Festival date varies by lunar calendar — confirm the date before booking
• October starts the transition to dry conditions — consider extending your trip
• Pack rain gear for the first half of September