Stream
Mangoky River
564 km from source to mouth · Madagascar.
MadagascarFlows into Mozambique Channel2nd longest in Madagascar
In numbers
Length
564km
Average flow
430m³/s
Basin
55,750km²
Drop
1,022m
from 1,022 m to 0 m
Country
1
The journey
From source to mouth
564 km of river and 2 stops on the way: 1 towns and cities on its banks, dams, bridges and the tributaries that feed it.
- 0 kmSourceat 1,022 m
- 274 kmZomandao Rivertributary
- 312 kmBeroroha18,632 people
- 564 kmMozambique Channelat 0 m
Water level along the river (RiverATLAS; the height is exaggerated). Towns: GeoNames and Wikidata; bridges, dams and tributaries: Wikidata.
River in Madagascar
At the mouth it carries 433 m³/s on average: an Olympic pool every 5.8 seconds. It drops from 1,022 m to 0 m, 1.8 m per kilometre on average. Its basin covers 55,750 km², about the size of HR. 1.5 million people live in it. Highest water: February; lowest: from June to September. No large dam holds it back: it is one of the world's free-flowing rivers.
Where to start
- BerorohaLargest city on its banks · 18,632 people
- Morondava Airport (MOQ)Nearest airport with scheduled flights, 177 km from the cityCar hire at TNR airport (Antananarivo)Discover Cars · Affiliate link↗
- On the water8 ferry piers, marinas, boat rentals and boat ramps along the river (OpenStreetMap)
- From April to AugustThe best months to visit
Mangoky River, month by month
Highest water: February
Lowest water: from June to September. Best months to visit: from April to August.
From about 83 m³/s in the lowest month to 1,200 m³/s in the highest. An estimate: the monthly flow is modelled from the lowest and highest months of WaterGAP (RiverATLAS, 1971–2000) and the rain and snow along the river (WorldClim). Dams change the real rhythm. The chip is the average air temperature; below it, the month's rain.
Plan the trip
Plan the trip: boat trips, a bed by the river, 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.
The basin
Mangoky River: the basin in numbers
54,934 km² of land send their water to this river. This is what lives on it.
- 1.5millionpeople live in the basin
- 27/km²people per km²
- 726maverage altitude of the basin
- 972mmof rain a year (basin average)
- 22.1°Caverage air temperature
- 1%protected areas
- 0.1%covered by lakes
What covers the basin
- 7% Forest
- 7% Cropland
- 55% Pasture
RiverATLAS (HydroATLAS v1.0, CC BY 4.0): land cover, people, protected areas, glaciers and dams over the whole basin upstream of the mouth.
Along the river
Mangoky River: what you find on the way
- 1Waterfalls
- 8Ferry piers
From OpenStreetMap, within 2.2 km of the river. Not mapped is not the same as not there.
From space
The source and the mouth, seen from orbit


Sentinel-2 cloudless 2016 by EOX IT Services GmbH (contains modified Copernicus Sentinel data 2016), CC BY 4.0. The glowing line is the river as drawn by RiverATLAS.
Photos
Mangoky River in pictures




Tributaries
Where it flows, and what flows into it
Tributaries (1)
Also: Zomandao River
Nearby
Rivers nearby
Where these numbers come from
| Name, length, places | Wikidata (Q1288223) · CC0 |
|---|---|
| Course, profile, basin | RiverATLAS v1.0 (HydroATLAS, Linke et al. 2019) · CC BY 4.0 — followed from the source to the mouth given by Wikidata |
| Flow | WaterGAP (RiverATLAS), 1971–2000 · CC BY 4.0 |
| Climate along the river | WorldClim (RiverATLAS), 1970–2000 · CC BY 4.0 |
| Towns, bridges, dams | Wikidata · CC0; GeoNames · CC BY 4.0 |
| Along the river | © OpenStreetMap contributors · ODbL |
| Images | EOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons |
Every source and licence is on the data sources page.
The family
Do you prefer beaches, lakes, mountains, waterfalls, islands, rivers or canyons?
Same idea, other landscapes: field atlases built on open data, month by month, in seven languages.