Slate River near Thunder Bay water level

Name: Slate River near Thunder Bay 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, Slate River, Ontario, Canada

Directions

Normal for mid-October

Water level

25.57m Steady over the last 24 hours

Measured Oct 18, 2026, 01:35 PM EDT (2 hours ago)

Flow: 0.08 m³/s

History

7 days 30 days 1 year Years compared

20252026

Water level Normal range (10–90 %)

What this means

Water levels are unremarkable at Slate River near Thunder Bay, where the gauge shows 25.57 m.

The median for mid-October is 25.58 m, based on 20 years of readings, so the water level is 0.02 m below typical. On the same day last year the reading was 25.52 m, a difference of +0.04 m.

It has barely moved over the past 24 hours. The 30-day range is 25.49 m – 25.57 m.

Fall is often low-water season on rivers, until steadier rain returns.

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

Key numbers

Median for this date: 25.58 m0.02 m below the median for this date
Normal for this date: 25.49 m – 25.81 m8 years in 10 fall in this range (20 years of records)
Same day last year: 25.52 m+0.04 m
Lowest and highest in 30 days: 25.49 m – 25.57 m
Lowest and highest in 12 months: 25.49 m – 25.87 m

Freshet, ice and paddling

Open-water season is the time for canoe trips and fishing, though rapids change character with every few centimetres of water.

Flood advisories come from the provincial river forecast centre.

Weather at the gauge

The forecast is not available right now.

Sunrise 08:22 AM Sunset 07:05 PM Daylight 10 hr, 42 min First quarter 52%

Map

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Kaministiquia River at West Fort WilliamRiver gauge, Kaministiquia River	183.19 m	Normal	+0.07 m	4.1 km
Neebing River near Thunder BayRiver gauge, Neebing River	184.42 m	Normal	±0	9.7 km
Neebing River near IntolaRiver gauge, Neebing River	27.16 m	Very low	−0.01 m	13 km
Whitefish River near StanleyRiver gauge, Whitefish River	4.06 m	Low	−0.01 m	15 km
Corbett Creek near MurilloRiver gauge, Corbett Creek	5.84 m	Normal	+0.01 m	15 km
McIntyre River above Thunder BayRiver gauge, McIntyre River	307.74 m	Very high	+0.01 m	18 km
McVicar Creek at Thunder BayRiver gauge, McVicar Creek	4.98 m	Low	±0	19 km
Kaministiquia River at KaministiquiaRiver gauge, Kaministiquia River	301.79 m	Low	−0.01 m	27 km

Questions and answers

Is the Slate River near Thunder Bay higher than last year?

Yes, it is 0.04 m higher than on the same day last year, when the reading was 25.52 m.

What is a normal level for the Slate River near Thunder Bay in mid-October?

The median for mid-October is 25.58 m. In 8 years out of 10 the reading falls between 25.49 m and 25.81 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 25.57 m on the gauge does not mean the water is that deep.

What is the water level of Slate River near Thunder Bay today?

On Oct 18, 2026, 01:35 PM EDT, the water level was 25.57 m. Steady over the last 24 hours.

Is Slate River near Thunder Bay rising or falling?

Steady over the last 24 hours. Up 0.07 m over the last 7 days.

Is the level of Slate River near Thunder Bay normal?

Normal 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:02AB023 (Agency page)
Coordinates: 48.32576, -89.40421 (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	25.57 m	2026-10-18 17:35	Provisional
Flow	0.08 m³/s	2026-10-18 17:35	Provisional

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How to cite

Environment and Climate Change Canada – Water Survey of Canada: Slate River near Thunder Bay (eccc:02AB023). Accessed October 18, 2026 via Nivelmap, https://nivelmap.com/en/canada/ontario/slate-river-near-thunder-bay

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