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South Nation River at Chesterville water level

River gauge, South Nation River, Ontario, Canada

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Right now

Very high for mid-October

Water level

6.34m Up 0.03 m over the last 24 hours

5.5 6.0

History

History
5.56.0mOct 13Oct 14Oct 16Oct 18Oct 195.56.0mOct 13Oct 16Oct 19
5.56.0mSep 20Sep 27Oct 4Oct 12Oct 195.56.0mSep 20Oct 4Oct 19
5.56.06.5mOct 2025Jan 2026Apr 2026Jul 2026Oct 20265.56.06.5mOct 2025Apr 2026Oct 2026
5.56.06.5mJanMarMayJulSepNov20265.56.06.5mJanAprJulOct2026

20252026

Water level Normal range (10–90 %)

What this means

The South Nation River at Chesterville is well above normal at 6.34 m.

The median for mid-October is 5.97 m, based on 20 years of readings, so the water level is 0.36 m above typical. On the same day last year the reading was 6.01 m, a difference of +0.33 m.

It has risen 0.03 m over the past 24 hours. If the rise continues, low-lying paths and riverside parking can go under water. In the last month it has stayed between 6.25 m and 6.37 m.

That stands out in fall, when many rivers are usually near their lowest.

Compared with 20 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date
5.97 m0.36 m above the median for this date
Normal for this date
5.41 m – 6.31 m8 years in 10 fall in this range (20 years of records)
Same day last year
6.01 m+0.33 m
Lowest and highest in 30 days
6.25 m – 6.37 m
Lowest and highest in 12 months
5.41 m – 6.37 m

Flood levels and safety

A high reading on its own does not mean property is at risk. The warnings issued by the provincial river forecast centre take local defences and the forecast into account.

Readings can change quickly after heavy rain upstream, so check again before heading near the water.

About the South Nation River

South Nation River

The South Nation River is a river in Eastern Ontario, Canada. It springs from forests and marshes located north of Brockville, and it flows 175 kilometres (109 mi) northeast to empty into the Ottawa River north of Plantagenet. Its watershed covers 3,900 square kilometres (1,500 sq mi).

Read more on Wikipedia

Text and image from Wikipedia and Wikimedia Commons, licensed under CC BY-SA.

Weather at the gauge

Rain in the last 3 days: 14 mm. Rain that falls upstream can take hours or days to show up at a river gauge.

19 Mon 18° 6° – Wind 18 km/h
20 Tue 13° 4° – Wind 14 km/h
21 Wed 12° 1° – Wind 11 km/h
22 Thu 15° 3° – Wind 16 km/h
23 Fri 10° 2° – Wind 14 km/h
24 Sat 11° -1° – Wind 11 km/h
25 Sun 15° 2° – Wind 18 km/h

Forecast: Open-Meteo

Sunrise 07:22 AM Sunset 06:11 PM Daylight 10 hr, 48 min First quarter 63%

Map

Other gauges on the South Nation River

Gauge Level Compared with normal 24 hours Distance
South Nation River at SpencervilleRiver gauge, South Nation River 11.12 m Very high −0.03 m 38 km
South Nation River near Plantagenet SpringsRiver gauge, South Nation River 1.31 m Very high −0.37 m 50 km

Nearby gauges

Gauge Level Compared with normal 24 hours Distance
Payne River near BerwickRiver gauge, Payne River 6.31 m Very high −0.07 m 14 km
South Branch South Nation River near Winchester SpringsRiver gauge, South Branch South Nation River 7.57 m Very high −0.13 m 16 km
Castor River at RussellRiver gauge, Castor River 3.35 m Very high −0.08 m 20 km
South Castor River at KenmoreRiver gauge, South Castor River 1.53 m Very high −0.11 m 20 km
North Branch South Nation River near HeckstonRiver gauge, North Branch South Nation River 1.12 m Very high −0.08 m 26 km
Raisin River at Black RiverRiver gauge, Raisin River 4.99 m Very high −0.19 m 28 km
Grass River at Chase MillsRiver gauge, Grass River 901 cfs Normal −239.0 cfs 19 mi
Raquette River at RaymondvilleRiver gauge, Raquette River 987 cfs Normal −133.0 cfs 22 mi

Questions and answers

Is the South Nation River at Chesterville higher than last year?

Yes, it is 0.33 m higher than on the same day last year, when the reading was 6.01 m.

What is a normal level for the South Nation River at Chesterville in mid-October?

The median for mid-October is 5.97 m. In 8 years out of 10 the reading falls between 5.41 m and 6.31 m, based on 20 years of records.

Is the river level the same as the depth of the water?

No. The reading is measured from a fixed zero mark at the gauge, so 6.34 m on the gauge does not mean the water is that deep.

What is the water level of South Nation River at Chesterville today?

On Oct 19, 2026, 07:15 PM EDT, the water level was 6.34 m. Up 0.03 m over the last 24 hours.

Is South Nation River at Chesterville rising or falling?

Up 0.03 m over the last 24 hours. Steady over the last 7 days.

Is the level of South Nation River at Chesterville normal?

Very high for mid-October. Compared with 20 years of daily readings for this time of year.

How often is this data updated?

Environment and Climate Change Canada – Water Survey of Canada publishes a new reading every hour. This page refreshes within minutes of each update.

For specialists

Station codes, datum, parameters, data quality and downloads
Operator
Environment and Climate Change Canada – Water Survey of Canada
Station code
eccc:02LB009 (Agency page)
Coordinates
45.10108, -75.22608 (WGS84)
Vertical datum
station datum (assumed datum)
Update interval
every hour
Licence
Open Government Licence – Canada. Contains information licensed under the Open Government Licence – Canada

Published series

ParameterLast valueTime (UTC)Quality
Water level 6.34 m 2026-10-19 23:15 Provisional

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How to cite

Environment and Climate Change Canada – Water Survey of Canada: South Nation River at Chesterville (eccc:02LB009). Accessed October 19, 2026 via Nivelmap, https://nivelmap.com/en/canada/ontario/south-nation-river-at-chesterville

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.