River
Tutong River
137 km from source to mouth · Brunei.
BruneiFlows into South China Sea2nd longest in Brunei
In numbers
Length
137km
Average flow
64m³/s
Basin
1,300km²
Drop
58m
from 58 m to 0 m
Country
1
The journey
From source to mouth
137 km of river and 3 stops on the way: 2 towns and cities on its banks, dams, bridges and the tributaries that feed it.
- 0 kmSourceat 58 m
- 31 kmLuagan Merimbun0.5 km²
- 63 kmTutong19,151 people
- 63 kmSengkarai1,694 people
- 64 kmSouth China Seaat 0 m
Water level along the river (RiverATLAS; the height is exaggerated). Towns: GeoNames and Wikidata; bridges, dams and tributaries: Wikidata.
River in Brunei
At the mouth it carries 64 m³/s on average: an Olympic pool every 39 seconds. It drops from 58 m to 0 m, 0.4 m per kilometre on average. Its basin covers 1,300 km², about the size of MQ. 26,000 people live in it. Highest water: from November to January. No large dam holds it back: it is one of the world's free-flowing rivers.
Where to start
- TutongLargest city on its banks · 19,151 people
- Brunei International Airport (BWN)Nearest airport with scheduled flights, 35 km from the cityCar hire at BKI airport (Kota Kinabalu)Discover Cars · Affiliate link↗
- From February to MarchThe best months to visit
Tutong River, month by month
Highest water: from November to January
Best months to visit: from February to March.
From about 47 m³/s in the lowest month to 95 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
Tutong River: the basin in numbers
1,016 km² of land send their water to this river. This is what lives on it.
- 26,000people live in the basin
- 25/km²people per km²
- 65maverage altitude of the basin
- 3,274mmof rain a year (basin average)
- 27.1°Caverage air temperature
- 31%protected areas
- 0.5%covered by lakes
What covers the basin
- 61% Forest
- 2% Cropland
- 1% Pasture
- 2% Towns and cities
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
Tutong River: what you find on the way
- 1River beachesSeri Kenangan Beach
From OpenStreetMap, within 1.2 km of the river. Not mapped is not the same as not there.
Cross-checked with our atlases
Tutong River in our other atlases
What our sister atlases know about the waterfalls on this river, the lakes it flows through, the beaches at its mouth, the mountains where it rises and the islands off its mouth.
1lake on its wayLakeyas
2mountains at the sourcePeakyas
Lakes and reservoirs (1)
Lakes it flows through, by Lakeyas
- Luagan Merimbunkm 310.5km²
Lakeyas is coming soonOpen Lakeyas ↗
Mountains at the source (2)
Within 15 km of the source, by Peakyas
- Bukit Bedawan10 km away452m
- Bukit Supon13 km away49m
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
Tutong River in pictures
Where these numbers come from
| Name, length, places | Wikidata (Q2461828) · CC0 |
|---|---|
| Course, profile, basin | RiverATLAS v1.0 (HydroATLAS, Linke et al. 2019) · CC BY 4.0 — followed along the river network from the point 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 |
| Our other atlases | Lakeyas, Peakyas — Wikidata · CC0; © OpenStreetMap contributors · ODbL; GeoNames · CC BY 4.0; HydroLAKES · CC BY 4.0; NOAA OISST |
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.



