Grand River near Dundalk water level

Name: Grand River near Dundalk water level (Environment and Climate Change Canada – Water Survey of Canada)
Creator: Environment and Climate Change Canada – Water Survey of Canada
License: https://open.canada.ca/en/open-government-licence-canada

River gauge, Grand River, Ontario, Canada

Directions

Very high for mid-October

Water level

1.66m Steady over the last 24 hours

Measured Oct 19, 2026, 04:35 PM EDT (1 hour ago)

Flow: 2.60 m³/s

History

7 days 30 days 1 year Years compared

20252026

Water level Normal range (10–90 %)

What this means

The gauge at Grand River near Dundalk shows 1.66 m, well above normal for mid-October.

That puts it 0.40 m above the median of 1.26 m for mid-October, based on 21 years of readings. A year ago it stood at 1.23 m (+0.43 m).

The level has held steady over the past 24 hours. Over the past 30 days it has moved between 1.28 m and 1.66 m.

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

Compared with 21 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date: 1.26 m0.40 m above the median for this date
Normal for this date: 1.11 m – 1.65 m8 years in 10 fall in this range (21 years of records)
Same day last year: 1.23 m+0.43 m
Lowest and highest in 30 days: 1.28 m – 1.66 m
Lowest and highest in 12 months: 1.23 m – 1.72 m

High water at Grand River near Dundalk

Official flood alerts and warnings come from the provincial river forecast centre. They cover areas, not single gauges, so a warning can be in force before this reading looks dramatic.

Keep children and dogs well back from the edge, and stay off flooded footpaths and towpaths.

About the Grand River

The Grand River, formerly known as the River Ouse, is a large river in Ontario, Canada. It lies along the western fringe of the Greater Golden Horseshoe region of Ontario which overlaps the eastern portion of southwestern Ontario, sometimes referred to as Midwestern Ontario, along the length of this river. From its source near Wareham, Ontario, it flows south through Grand Valley, Fergus, Elora, Waterloo, Kitchener, Cambridge, Paris, Brantford, Ohsweken, Six Nations of the Grand River, Caledonia, and Cayuga before emptying into the north shore of Lake Erie south of Dunnville at Port Maitland. One of the scenic features of the river is the falls and Gorge at Elora.

Weather at the gauge

Rain in the last 3 days: 13 mm. Rain that falls upstream can take hours or days to show up at a river gauge.

19 Mon 16° 5° – Wind 17 km/h

20 Tue 13° 4° – Wind 17 km/h

21 Wed 16° 1° – Wind 11 km/h

22 Thu 17° 6° – Wind 13 km/h

23 Fri 12° 2° – Wind 16 km/h

24 Sat 15° 2° – Wind 12 km/h

25 Sun 17° 5° – Wind 26 km/h

Forecast: Open-Meteo

Sunrise 07:42 AM Sunset 06:32 PM Daylight 10 hr, 51 min First quarter 62%

Map

Other gauges on the Grand River

Gauge	Level	Compared with normal	24 hours	Distance
Grand River near MarsvilleRiver gauge, Grand River	3.31 m	Low	±0	32 km
Grand River below Shand DamRiver gauge, Grand River	1.54 m	Low	±0	46 km
Grand River at West MontroseRiver gauge, Grand River	11.10 m	Low	−0.01 m	62 km
Grand River near DoonRiver gauge, Grand River	4.03 m	Low	+0.01 m	81 km
Grand River at GaltRiver gauge, Grand River	0.70 m	Low	−0.01 m	88 km
Grand River at BrantfordRiver gauge, Grand River	0.26 m	Normal	±0	112 km

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Beaver River near VandeleurRiver gauge, Beaver River	7.13 m	Very low	±0	27 km
Mad River at AveningRiver gauge, Mad River	1.04 m	Low	−0.03 m	30 km
Beatty Saugeen River near HolsteinRiver gauge, Beatty Saugeen River	1.74 m	Normal	+0.02 m	31 km
Pine River near EverettRiver gauge, Pine River	−0.03 m	Very low	−0.01 m	33 km
Nottawasaga River at HockleyRiver gauge, Nottawasaga River	0.68 m	Low	−0.01 m	34 km
Saugeen River above DurhamRiver gauge, Saugeen River	1.22 m	Normal	−0.02 m	34 km
Credit River near OrangevilleRiver gauge, Credit River	11.20 m	Normal	±0	37 km
Boyne River at Earl Rowe ParkRiver gauge, Boyne River	2.85 m	Normal	−0.01 m	37 km

Questions and answers

How does the Grand River near Dundalk compare with last year?

It is 0.43 m higher than on the same day last year, when the reading was 1.23 m.

What is a normal level for the Grand River near Dundalk in mid-October?

The median for mid-October is 1.26 m. In 8 years out of 10 the reading falls between 1.11 m and 1.65 m, based on 21 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 1.66 m on the gauge does not mean the water is that deep.

What is the water level of Grand River near Dundalk today?

On Oct 19, 2026, 04:35 PM EDT, the water level was 1.66 m. Steady over the last 24 hours.

Is Grand River near Dundalk rising or falling?

Steady over the last 24 hours. Up 0.04 m over the last 7 days.

Is the level of Grand River near Dundalk normal?

Very high for mid-October. Compared with 21 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:02GA041 (Agency page)
Coordinates: 44.14003, -80.36270 (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

Parameter	Last value	Time (UTC)	Quality
Water level	1.66 m	2026-10-19 20:35	Provisional
Flow	2.60 m³/s	2026-10-19 20:35	Provisional

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How to cite

Environment and Climate Change Canada – Water Survey of Canada: Grand River near Dundalk (eccc:02GA041). Accessed October 19, 2026 via Nivelmap, https://nivelmap.com/en/canada/ontario/grand-river-near-dundalk

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.

Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer