St. Marys River near Garden River water level

Name: St. Marys River near Garden River 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, St. Marys River, Ontario, Canada

Directions

Normal for mid-October

Water level

24.08m Down 0.12 m over the last 24 hours

Measured Oct 19, 2026, 05:55 PM EDT (1 hour ago)

History

7 days 30 days 1 year Years compared

20252026

Water level Normal range (10–90 %)

What this means

Water levels are unremarkable at St. Marys River near Garden River, where the gauge shows 24.08 m.

The median for mid-October is 24.06 m, based on 21 years of readings, so the water level is 0.02 m above typical. On the same day last year the reading was 23.86 m, a difference of +0.21 m.

It is still going down, by 0.12 m over the past 24 hours. The 30-day range is 23.83 m – 24.21 m.

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

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

Key numbers

Median for this date: 24.06 m0.02 m above the median for this date
Normal for this date: 23.51 m – 24.71 m8 years in 10 fall in this range (21 years of records)
Same day last year: 23.86 m+0.21 m
Lowest and highest in 30 days: 23.83 m – 24.21 m
Lowest and highest in 12 months: 23.55 m – 24.12 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.

About the St. Marys River

The St. Marys River, sometimes written St. Mary's River, drains Lake Superior, starting at the end of Whitefish Bay and flowing 74.5 miles (119.9 km) southeast into Lake Huron, with a fall of 23 feet (7.0 m). For its entire length, it is an international border, separating Michigan in the United States from Ontario, Canada.

Weather at the gauge

Rain in the last 3 days: 8.4 mm. Rain that falls upstream can take hours or days to show up at a river gauge.

19 Mon 17° 6° – Wind 9 km/h

20 Tue 13° 3° – Wind 12 km/h

21 Wed 17° 5° – Wind 11 km/h

22 Thu 18° 7° – Wind 5 km/h

23 Fri 15° 7° – Wind 17 km/h

24 Sat 19° 9° – Wind 15 km/h

25 Sun 16° 9° 1.2 mm Wind 15 km/h

Forecast: Open-Meteo

Sunrise 08:00 AM Sunset 06:44 PM Daylight 10 hr, 44 min First quarter 63%

Map

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Root River at Sault Ste. MarieRiver gauge, Root River	13.00 m	Very high	−0.03 m	12 km
St. Marys River at Sault Ste. Marie, OntarioRiver gauge, St. Marys River	65,800 cfs	Low	−13,700.0 cfs	9 mi
Goulais River near Kirby'S CornerRiver gauge, Goulais River	2.71 m	Very low	−0.01 m	24 km
Big Carp River near Sault Ste. MarieRiver gauge, Big Carp River	2.46 m	Normal	−0.04 m	26 km
Thessalon River near Poplar DaleRiver gauge, Thessalon River	1.89 m	Very low	−0.02 m	32 km
Goulais River near SearchmontRiver gauge, Goulais River	7.35 m	Low	−0.02 m	38 km
Pine River near RudyardRiver gauge, Pine River	1.11 ft	Below flood stage	−0.06 ft	33 mi
Batchawana River near BatchawanaRiver gauge, Batchawana River	2.18 m	Low	−0.01 m	60 km

Questions and answers

Is the St. Marys River near Garden River higher than last year?

Yes, it is 0.21 m higher than on the same day last year, when the reading was 23.86 m.

What is a normal level for the St. Marys River near Garden River in mid-October?

The median for mid-October is 24.06 m. In 8 years out of 10 the reading falls between 23.51 m and 24.71 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 24.08 m on the gauge does not mean the water is that deep.

What is the water level of St. Marys River near Garden River today?

On Oct 19, 2026, 05:55 PM EDT, the water level was 24.08 m. Down 0.12 m over the last 24 hours.

Is St. Marys River near Garden River rising or falling?

Down 0.12 m over the last 24 hours. Up 0.05 m over the last 7 days.

Is the level of St. Marys River near Garden River normal?

Normal 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:02CA003 (Agency page)
Coordinates: 46.53258, -84.13125 (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	24.08 m	2026-10-19 21:55	Provisional

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How to cite

Environment and Climate Change Canada – Water Survey of Canada: St. Marys River near Garden River (eccc:02CA003). Accessed October 19, 2026 via Nivelmap, https://nivelmap.com/en/canada/ontario/st-marys-river-near-garden-river

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