Ottawa River at Thorne water level

Name: Ottawa River at Thorne 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, Ottawa River, Ontario, Canada

Directions

Very low for mid-October

Water level

9.48m Down 0.01 m over the last 24 hours

Measured Oct 18, 2026, 12:40 AM EDT (1 hour ago)

History

7 days 30 days

Water level Normal range (10–90 %)

What this means

At 9.48 m, the Ottawa River at Thorne is far below normal for mid-October.

That puts it 0.17 m below the median of 9.65 m for mid-October, based on 9 years of readings.

The level is falling, down 0.01 m over the past 24 hours. Without real rain upstream, that is unlikely to change quickly. Over the past 30 days it has moved between 9.36 m and 9.84 m.

Fall is often low-water season on rivers, and it usually takes a few days of steady rain to change that.

Compared with 9 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date: 9.65 m0.17 m below the median for this date
Normal for this date: 9.55 m – 9.75 m8 years in 10 fall in this range (9 years of records)
Lowest and highest in 30 days: 9.36 m – 9.84 m
Lowest and highest in 12 months: 9.48 m – 9.70 m

Conditions at Ottawa River at Thorne

Low water means shallow riffles on canoe trips and warmer water for fish.

Flood advisories come from the provincial river forecast centre.

About the Ottawa River

The Ottawa River is a river in the Canadian provinces of Ontario and Quebec. It is named after the Algonquin word "to trade", as it was the major trade route of Eastern Canada at the time. For most of its length, it defines the border between these two provinces. It is a major tributary of the St. Lawrence River and the longest river in Quebec.

Weather at the gauge

Rain in the last 3 days: 10 mm. Rain that falls upstream can take hours or days to show up at a river gauge.

18 Sun 14° 2° – Wind 22 km/h

19 Mon 15° 5° – Wind 9 km/h

20 Tue 13° 3° – Wind 10 km/h

21 Wed 14° 2° – Wind 12 km/h

22 Thu 15° 6° – Wind 9 km/h

23 Fri 13° 2° – Wind 8 km/h

24 Sat 14° 4° – Wind 18 km/h

Forecast: Open-Meteo

Sunrise 07:39 AM Sunset 06:26 PM Daylight 10 hr, 47 min First quarter 47%

Map

Other gauges on the Ottawa River

Gauge	Level	Compared with normal	24 hours	Distance
Ottawa River at MattawaRiver gauge, Ottawa River	52.20 m	Very low	+0.03 m	52 km

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Lac Témiscamingue à TémiscamingLake, Lac Témiscamingue	5.05 m	Low	−0.08 m	2.1 km
Lake Timiskaming at McLarens PointLake, Lake Timiskaming	99.11 m	No reference yet	±0	20 km
Mattawa River below Bouillon LakeRiver gauge, Mattawa River	8.47 m	No reference yet	+0.02 m	47 km
Chippewa Creek at North BayRiver gauge, Chippewa Creek	13.23 m	Normal	−0.04 m	51 km
Lake Nipissing at North BayLake, Lake Nipissing	5.67 m	Normal	−0.01 m	52 km
Little Sturgeon River below Booth LakeRiver gauge, Little Sturgeon River	2.65 m	Normal	+0.01 m	53 km
La Vase River at North BayRiver gauge, La Vase River	10.76 m	Normal	−0.10 m	54 km
Wasi River near AstorvilleRiver gauge, Wasi River	8.02 m	Very low	−0.02 m	60 km

Questions and answers

What is a normal level for the Ottawa River at Thorne in mid-October?

The median for mid-October is 9.65 m. In 8 years out of 10 the reading falls between 9.55 m and 9.75 m, based on 9 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 9.48 m on the gauge does not mean the water is that deep.

What is the water level of Ottawa River at Thorne today?

On Oct 18, 2026, 12:40 AM EDT, the water level was 9.48 m. Down 0.01 m over the last 24 hours.

Is Ottawa River at Thorne rising or falling?

Down 0.01 m over the last 24 hours. Steady over the last 7 days.

Is the level of Ottawa River at Thorne normal?

Very low for mid-October. Compared with 9 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.

Where does this data come from?

The values come directly from Environment and Climate Change Canada – Water Survey of Canada, the official operator of this gauge, and are published under the Open Government Licence – Canada. We do not estimate or model live values.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: Environment and Climate Change Canada – Water Survey of Canada
Station code: eccc:02JE032 (Agency page)
Coordinates: 46.70014, -79.09859 (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	9.48 m	2026-10-18 04:40	Provisional

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How to cite

Environment and Climate Change Canada – Water Survey of Canada: Ottawa River at Thorne (eccc:02JE032). Accessed October 18, 2026 via Nivelmap, https://nivelmap.com/en/canada/ontario/ottawa-river-at-thorne

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