Realtime

Sri Lanka Water Levels

River-gauge readings from the Department of Irrigation, updated every minute.

Station

42 stations · 20 basins

Thaldena

Mahaweli Ganga

Normal

Latest

0.29

23 May 2026, 07:03

Alert

3.00

Minor flood

4.00

Major flood

5.00

Last 4 days · 94 readings · Asia/Colombo. Units are reported by the source as-is — Kelani Ganga stations are in feet; other basins may differ.

Next hour

Medium confidence

Steady+0.00 → 0.29

Local trend

+0.00/h

Upstream avg

+0.00/h

Rain here (6h)

0.0mm

Rain upstream (6h)

1.2mm

Nawalapitiya 2.4mm

Mahaweli Ganga — upstream to downstream

24h trend

Nawalapitiya
upstream
1.32
+0.05/3h
Peradeniya
1.47
-0.03/3h
Calidonia
—
Thaldena
0.29
+0.01/3h
Weraganthota
-3.20
Manampitiya
downstream
0.20

Stations ordered by river flow. Trend = change over last ~3 hours; arrow direction reflects rate. Ordering for this basin is by longitude — may not perfectly match river hydrology.