Will Matara flood in the next hour?

Matara flood risk right now: Alert. This is an estimate based on the Thalgahagoda gauge on the Nilwala Ganga (6.9 km away), which read 4.8 ft as of Tue, 27 Oct, 1:05 am (Sri Lanka time). In the next hour the Nilwala Ganga at Thalgahagoda should stay about the same (4.7–4.9 ft). This is a forecast for the river, not an official warning, and streets can flood before the river reaches a flood mark.

How is the flood risk for Matara worked out?

From the nearest river gauge ({gauge}, 6.9 km away), recent and expected rain, the gauge's forecast and any official warning. It is an estimate for the town, not an official warning, and streets can flood before the river reaches a flood mark.

Where does this come from and how often does it update?

River readings come from the Department of Irrigation's gauges, roughly once an hour, and this page checks for new ones every minute. This site is independent and not an official warning service: follow the Disaster Management Centre and call 117 in an emergency.

Is Matara flooding?

Matara

Matara flood risk right now: Alert. This is an estimate based on the Thalgahagoda gauge on the Nilwala Ganga (6.9 km away), which read 4.8 ft as of Tue, 27 Oct, 1:05 am (Sri Lanka time).

Reading at 1:05 am · 43 min ago

Alert

4.8 ft

Next hour

River steady

Next 24 hours

Risk stays high

Move valuables up, charge your phone

Experimental estimate. There is no river gauge in Matara; this uses Thalgahagoda, 6.9 km away, plus rain at the town and official warnings.

Call 117 Matara DMC office

Details

How this estimate works

· Starts from the river gauge's own level and forecast, the same as the gauge page.
· Heavy rain here (50 mm in 6 hours or 100 mm in 24 hours) raises it by one step, never more.
· Your own street level, if you set one, and official warnings can raise it further.
· It never says flooding is happening: only a measurement can show that.

Why

Nilwala Ganga at Thalgahagoda is 4.8 ft, rising slowly (at alert level)
47 mm of rain in the last 24 hours
35 mm of rain expected in the next 24 hours

Your river

Thalgahagoda

Nilwala Ganga · 6.9 km away

Alert4.8 ft1:05 am

Panadugama

Nilwala Ganga · 19 km away

Minor flood20.9 ft

Is this right?

Each answer helps us improve the forecast for your area.

Based on: Thalgahagoda gauge on the Nilwala Ganga, 6.9 km away

Set your street's flood level

At what Thalgahagoda reading does water reach your street? Saved on this device only, never sent anywhere.

Rain in Matara

Moderate rain in the last 24 hours (47 mm). Moderate rain expected early this morning, about 35 mm in the next 24 hours.

mm per hour

Tap or hover a bar to see that hour.

Rain map

Did the streets near you get water today?

Your answer helps us check our warnings. It is anonymous: we save only the town and your answer. Nobody sees single answers; we show only totals of 3 or more.

When? (optional)

River map

GaugeReservoirTap a gauge or reservoir for details.

Official flood map

In the Irrigation Department's maps of past floods (Nilwala Ganga 2017), these Grama Niladhari divisions around Matara were partly or fully under water:

Weliweriya West2017
Thotamuna2017
Kadeweediya South2017
Fort2017
Weliweriya East2017
Isadeen Town2017
Kadeweediya East2017
Sudarshi Place2017
and 4 more nearby

Flood help and phone numbers

Common questions

Is Matara flooding now?: Matara flood risk right now: Alert. This is an estimate based on the Thalgahagoda gauge on the Nilwala Ganga (6.9 km away), which read 4.8 ft as of Tue, 27 Oct, 1:05 am (Sri Lanka time).
Will Matara flood in the next hour?: Matara flood risk right now: Alert. This is an estimate based on the Thalgahagoda gauge on the Nilwala Ganga (6.9 km away), which read 4.8 ft as of Tue, 27 Oct, 1:05 am (Sri Lanka time). In the next hour the Nilwala Ganga at Thalgahagoda should stay about the same (4.7–4.9 ft). This is a forecast for the river, not an official warning, and streets can flood before the river reaches a flood mark.
How is the flood risk for Matara worked out?: From the nearest river gauge ({gauge}, 6.9 km away), recent and expected rain, the gauge's forecast and any official warning. It is an estimate for the town, not an official warning, and streets can flood before the river reaches a flood mark.
Where does this come from and how often does it update?: River readings come from the Department of Irrigation's gauges, roughly once an hour, and this page checks for new ones every minute. This site is independent and not an official warning service: follow the Disaster Management Centre and call 117 in an emergency.

Nilwala Ganga · Sources: Department of Irrigation gauges, Open-Meteo rain, Disaster Management Centre warnings.