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Readings from the Department of Irrigation and the Mahaweli Authority. Warnings from the Disaster Management Centre. Rain forecasts from Open-Meteo. Map © OpenStreetMap contributors; some river lines from the Department of Irrigation.

Not an official warning service. In an emergency, call 117.

© 2026 Sri Lanka Water Levels. Built in Sri Lanka.Made by @shakeeb_xAutomated updates: @waterlevelslk

EN·සිංහල·தமிழ்

Senanayake Samudraya Reservoir Water Level & Spill Today

Sri Lanka Water LevelsLive river-gauge readings

Basins

Aththanagalu Oya
Deduru Oya
Gal Oya
Gin Ganga
Heda Oya
Kala Oya
Kalu Ganga
Kelani Ganga
Kirindi Oya
Kumbukkan Oya
Ma Oya
Maduru Oya
Maha Oya
Mahaweli Ganga
Malwathu Oya
Mee Oya
Menik Ganga
Nilwala Ganga
Walawe Ganga
Yan Oya

EN සිං த

Reservoirs › Senanayake Samudraya Reservoir

17% full

Home › Reservoirs › Senanayake Samudraya Reservoir

Senanayake Samudraya Reservoir

සේනානායක සමුද්‍රය · சேனாநாயக்க சமுத்திரம்Gal OyaAmpara

Senanayake Samudraya reservoir is not releasing water and is 17% full. Irrigation Department, 26 Oct.

Holding

As of 26 Oct · Checked 2 min ago

Senanayake Samudraya Reservoir: Senanayake Samudraya — Photo: G.Kiruthikan, CC BY-SA 4.0 via Wikimedia Commons

17%full

58.6 of 110.0 ft

51.4 ft below full

Irrigation Department · 26 Oct

Release now

Only canal outlets are open

Outlet gates 400 cusecs

Irrigation Department · 26 Oct

Rain, day before: 28 mm; Irrigation Department · 26 Oct
Holds when full: ~950 million m³; Irrigation Department · 26 Oct
Source: Irrigation Department · 26 Oct

Recent days

Water depth, % of full supply
Released downstream · Release (cusecs)
Outlet gates

History starts 23 Oct 2026.

Senanayake Samudraya

Where the water goes

Senanayake Samudraya
Holding
Travel time not measured yet
AmparaNo flood levels0.00

Map of this river

On the same river

River page: Gal Oya
Flood history

Gauges

Ampara

Other reservoirs

Ekgal Oya

Photos

Senanayake Samudraya
Photo: G.Kiruthikan, CC BY-SA 4.0 via Wikimedia Commons
Senanayake Samudraya, view 2
Photo: G.Kiruthikan, CC BY-SA 4.0 via Wikimedia Commons
Senanayake Samudraya, view 3
Photo: G.Kiruthikan, CC BY-SA 4.0 via Wikimedia Commons
Senanayake Samudraya, view 4
Photo: AntanO, CC BY-SA 4.0 via Wikimedia Commons

Figures from the daily Irrigation Department and Mahaweli Authority reports. A blank there shows here as “no data”, never zero.

Common questions

Is Senanayake Samudraya releasing water?: Senanayake Samudraya reservoir is not releasing water and is 17% full. Irrigation Department, 26 Oct.
Where does the reservoir information come from?: From the Irrigation Department's daily reservoir sheet and the Mahaweli Authority's daily report. Both update about once a day, so check the date shown. This site is independent: for spill-gate warnings follow the Disaster Management Centre and call 117.

GaugeReservoirTap a gauge or reservoir for details.

Places on the map, from upstream to downstream

Ampara: No flood levels, 0.0
Senanayake Samudraya: Holding