Khone Phapheng Falls: water levels by month
Short answer: Khone Phapheng Falls carries the most water in September (about 23,719 m³/s on the Mekong) and the least in April (about 930 m³/s, 26 times less).
The widest falls in Asia. The monsoon swells the Mekong from July to October.
River flow through the year
| Month | Flow (share of peak) | Average m³/s | Level |
|---|---|---|---|
| January | 7% | 1,689 | Low water |
| February | 6% | 1,315 | Low water |
| March | 4% | 960 | Low water |
| April | 4% | 930 | Low water |
| May | 9% | 2,240 | Low water |
| June | 26% | 6,106 | Low water |
| July | 58% | 13,708 | Medium |
| August | 97% | 22,973 | High water |
| September | 100% | 23,719 | High water |
| October | 71% | 16,800 | Medium |
| November | 29% | 6,788 | Low water |
| December | 13% | 3,108 | Low water |
Tours
Questions
When is the best time to see Khone Phapheng Falls?
Khone Phapheng Falls carries the most water in September (about 23,719 m³/s on the Mekong) and the least in April (about 930 m³/s, 26 times less). The widest falls in Asia. The monsoon swells the Mekong from July to October.
When is Khone Phapheng Falls at its lowest?
April has the lowest average flow (4% of the September peak).
Average daily river discharge 2005-2024 from the GloFAS v4 hydrological reanalysis (Copernicus Emergency Management Service) via Open-Meteo, for the model river cell nearest the falls. Dams and diversions upstream can change real flow on the day.