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River

Tirso

152 km from source to mouth · Italy.

ItalyItalyFlows into Sea of Sardinia

Follow the riverMonth by month

SourceMouth
The river and every tributary in its basin, drawn from RiverATLAS (CC BY 4.0).

In numbers

Length

152km

Average flow

4.3m³/s

Basin

3,375km²

Drop

314m

from 314 m to 0 m

Country

1

The journey

From source to mouth

152 km of river and 11 stops on the way: 10 towns and cities on its banks, dams, bridges and the tributaries that feed it.

314 m0 m
Sourceat 314 m0 km
Busachi1,282 people96 km
Lake Omodeo13 km²100 km
Ollastra1,233 people123 km
Solarussa2,280 people129 km
Sea of Sardiniaat 0 m152 km
050100152 km
  1. 0 kmSourceat 314 m
  2. 96 kmBusachi1,282 people
  3. 100 kmLake Omodeo13 km²
  4. 123 kmOllastra1,233 people
  5. 125 kmZerfaliu1,125 people
  6. 129 kmSolarussa2,280 people
  7. 131 kmSimaxis2,074 people
  8. 139 kmSilì2,183 people
  9. 141 kmNuraxinieddu1,160 people
  10. 144 kmOristano31,671 people
  11. 145 kmDonigala Fenugheddu1,275 people
  12. 145 kmSolanas1,068 people
  13. 152 kmSea of Sardiniaat 0 m

Water level along the river (RiverATLAS; the height is exaggerated). Towns: GeoNames and Wikidata; bridges, dams and tributaries: Wikidata.

River in Sardinia, Italy

At the mouth it carries 4.3 m³/s on average: an Olympic pool every 584 seconds. It drops from 314 m to 0 m, 2.1 m per kilometre on average. Its basin covers 3,375 km², about the size of CV. 145,000 people live in it. Highest water: December; lowest: from June to September. It is heavily dammed: reservoirs can hold 82% of a year's flow.

Read more on Wikipedia

Where to start

  • OristanoLargest city on its banks · 31,671 people
  • Cagliari Elmas Airport (CAG)Nearest airport with scheduled flights, 83 km from the cityCar hire at CAG airport (Cagliari)Discover Cars · Affiliate link
  • On the water2 ferry piers, marinas, boat rentals and boat ramps along the river (OpenStreetMap)
  • From May to SeptemberThe best months to visit

Tirso, month by month

Highest water: December

Lowest water: from June to September. Best months to visit: from May to September.

70
10°64 mmJan
65
10°72 mmFeb
51
11°56 mmMar
38
14°49 mmApr
21
17°30 mmMay
10
21°17 mmJun
4.5
24°4 mmJul
3.3
24°10 mmAug
12
22°39 mmSep
37
18°74 mmOct
73
14°98 mmNov
85
11°90 mmDec
Water (estimated flow)Air (average) Rain (mm)Best months

From about 3.3 m³/s in the lowest month to 85 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

Tirso: the basin in numbers

3,398 km² of land send their water to this river. This is what lives on it.

DammedReservoirs can hold 82% of a year's flow: much of the river is a chain of lakes.
  • 145,000people live in the basin
  • 43/km²people per km²
  • 473maverage altitude of the basin
  • 730mmof rain a year (basin average)
  • 14.3°Caverage air temperature
  • 6%protected areas
  • 0.5%covered by lakes
  • 0.9km³held in reservoirs

What covers the basin

  • 8% Forest
  • 8% Cropland
  • 30% Pasture
  • 1% 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

Tirso: what you find on the way

  • 9DamsDiga Laghetto Prunaghe, Diga di Santa Chiara, Eleonora d'Arborea Dam and 6 more
  • 1Weirs
  • 1Boat ramps
  • 1MarinasPontile Monte Paza
  • 6River beachesVasca termale, terme abbandonate di Oddini o Oddine, Spiaggia del Pontile and 3 more

From OpenStreetMap, within 1.5 km of the river. Not mapped is not the same as not there.

Cross-checked with our atlases

Tirso 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
  • 27beaches at the mouth and on the banksCoastya
  • 9mountains at the sourcePeakyas
  • 2islands off the mouthIslandyas

Lakes and reservoirs (1)

Lakes it flows through, by Lakeyas

  1. Lake Omodeokm 77 · 60 m deep13km²

Lakeyas is coming soonOpen Lakeyas ↗

Beaches (27)

At the mouth (25 km) and on the banks, by Coastya

  1. Spiaggia di Torregrande3.2 km away24.6°C
  2. Spiaggia di Su Tingiosu16 km away24.6°C
  3. Spiaggia di Mari Ermi16 km away24.6°C
  4. Spiaggia di Maimoni13 km away24.6°C
  5. Spiaggia di San Giovanni di Sinis9.2 km away24.6°C
  6. Spiaggia di Mare morto8.7 km away24.6°C
  7. Abarossa Dog Beach6.0 km away24.6°C
  8. Spiaggia di Torre dei Corsari23 km away24.8°C

19 more on CoastyaOpen Coastya ↗

Mountains at the source (9)

Within 15 km of the source, by Peakyas

  1. monte Lerno8.4 km away1,094m
  2. Monte Fraidorzu9.4 km away1,002m
  3. monte Orulo13 km away742m
  4. Monte Pirastru15 km away
  5. monte Nuschele14 km away
  6. Monte sa Mesa15 km away
  7. Punta Covecada12 km away
  8. Punta Comoretta11 km away

1 more on PeakyasOpen Peakyas ↗

Islands off the mouth (2)

Within 30 km of the mouth, by Islandyas

  1. Mal di Ventre23 km away0.8km²
  2. Scoglio del Catalano23 km away

Islandyas is coming soonOpen Islandyas ↗

From space

The source and the mouth, seen from orbit

Tirso: satellite view of the source
The source14 km across
Tirso: satellite view of the mouth
The mouth10 km across

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

Tirso in pictures

Fordongianus - Ponte sul Tirso-SS 388 (06)
Gianni Careddu · CC BY-SA 3.0
2025 Vista de Punta Arxente dende as ruínas de San Tirso. Portocelo. Xove. Galiza
Lmbuga · CC BY-SA 4.0
2025 Vista dos arredores da praia de Sucastro dende as ruínas de San Tirso
Lmbuga · CC BY-SA 4.0
Busachi, fiume Tirso (01)
Gianni Careddu · CC BY-SA 3.0

Tributaries

Where it flows, and what flows into it

Tributaries (1)

Also: Taloro

Where these numbers come from

Name, length, placesWikidata (Q2121259) · CC0
Course, profile, basinRiverATLAS v1.0 (HydroATLAS, Linke et al. 2019) · CC BY 4.0 — followed along the river network from the point given by Wikidata
FlowWaterGAP (RiverATLAS), 1971–2000 · CC BY 4.0
Climate along the riverWorldClim (RiverATLAS), 1970–2000 · CC BY 4.0
Towns, bridges, damsWikidata · CC0; GeoNames · CC BY 4.0
Along the river© OpenStreetMap contributors · ODbL
ImagesEOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons
Our other atlasesLakeyas, Coastya, Peakyas, Islandyas — 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.

beachesCoastyaFind your beach: sea temperature, sun and swimming month by month.Visit
lakesLakeyasEvery lake on Earth: water temperature, ice, depth and the shore.Coming soonVisit
mountainsPeakyasEvery summit in 3D: summit weather, the 0 °C line, huts and trails.Visit
waterfallsCascadyasEvery waterfall: height, flow month by month and when it roars.Coming soonVisit
islandsIslandyasEvery island from the sea up: size, sea temperature, ferries and 3D.Coming soonVisit
riversRiveryasEvery river from source to sea: the journey, the flow and the basin in numbers.You are here
canyonsCanyonyasEvery canyon cut to scale: depth to the floor, rim and floor temperatures, trails and viewpoints.Coming soonVisit