Grassy Narrows Lake at Grassy Narrows water level

Name: Grassy Narrows Lake at Grassy Narrows 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

Lake, Grassy Narrows Lake, Ontario, Canada

Directions

Normal for mid-October

Surface elevation

318.73m Down 0.02 m over the last 24 hours

Measured Oct 19, 2026, 03:25 PM CDT (1 hour ago)

History

What this means

The water level at Grassy Narrows Lake at Grassy Narrows reads 318.73 m, about where it usually sits at this time of year.

The median for mid-October is 318.74 m, based on 11 years of readings, so the water level is 0.01 m below typical. On the same day last year the reading was 318.49 m, a difference of +0.24 m.

It is still going down, by 0.02 m over the past 24 hours. The 30-day range is 318.71 m – 318.82 m.

Lakes and reservoirs often sit lower in fall after a summer of evaporation and use, and recover with winter rain and spring snowmelt.

Compared with 11 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date: 318.74 m0.01 m below the median for this date
Normal for this date: 318.40 m – 320.31 m8 years in 10 fall in this range (11 years of records)
Same day last year: 318.49 m+0.24 m
Lowest and highest in 30 days: 318.71 m – 318.82 m
Lowest and highest in 12 months: 318.48 m – 319.28 m

Boating and fishing at Grassy Narrows Lake at Grassy Narrows

A lake in its usual range is what most ramps, docks and swimming areas are built for.

Conditions at the shore change with the level, so check with the agency that runs the lake before a trip.

Weather at the gauge

No rain in the last 3 days.

19 Mon 13° 3° – Wind 13 km/h

20 Tue 14° 4° – Wind 17 km/h

21 Wed 14° 5° – Wind 12 km/h

22 Thu 18° 4° – Wind 10 km/h

23 Fri 21° 11° – Wind 15 km/h

24 Sat 20° 8° 1.2 mm, 58% Wind 27 km/h

25 Sun 7° 0° 1.0 mm Wind 32 km/h

Forecast: Open-Meteo

Sunrise 07:45 AM Sunset 06:18 PM Daylight 10 hr, 33 min First quarter 62%

Map

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Forest Lake above Canyon LakeLake, Forest Lake	1.90 m	Very low	±0	35 km
Sturgeon River at Outlet of Salvesen LakeRiver gauge, Sturgeon River	0.34 m	Low	±0	39 km
Wabigoon River near QuibellRiver gauge, Wabigoon River	337.03 m	Low	+0.01 m	48 km
Winnipeg River at MinakiRiver gauge, Winnipeg River	316.03 m	Normal	−0.01 m	50 km
Lake of the Woods Eastern Outlet at Kenora PowerhouseLake, Lake of the Woods Eastern Outlet	322.62 m	Normal	±0	55 km
Winnipeg River below Kenora PowerhouseRiver gauge, Winnipeg River	316.20 m	Low	−0.01 m	55 km
Winnipeg River Western Channel near Tunnel IslandRiver gauge, Winnipeg River Western Channel	1.33 m	Low	±0	56 km
Lake of the Woods Western Outlet above Norman Dam and Powerhouse Site No.2Lake, Lake of the Woods Western Outlet	322.62 m	Normal	±0	56 km

Questions and answers

Is Grassy Narrows Lake at Grassy Narrows higher than last year?

Yes, it is 0.24 m higher than on the same day last year, when the reading was 318.49 m.

What is a normal level for Grassy Narrows Lake at Grassy Narrows in mid-October?

The median for mid-October is 318.74 m. In 8 years out of 10 the reading falls between 318.40 m and 320.31 m, based on 11 years of records.

Is Grassy Narrows Lake at Grassy Narrows really 318.73 m deep?

No. 318.73 m is the height of the water surface above sea level (or the agency's vertical datum), not the depth of the water.

What is the water level of Grassy Narrows Lake at Grassy Narrows today?

On Oct 19, 2026, 03:25 PM CDT, the surface elevation was 318.73 m. Down 0.02 m over the last 24 hours.

Is Grassy Narrows Lake at Grassy Narrows rising or falling?

Down 0.02 m over the last 24 hours. Down 0.03 m over the last 7 days.

Is the level of Grassy Narrows Lake at Grassy Narrows normal?

Normal for mid-October. Compared with 11 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:05QE015 (Agency page)
Coordinates: 50.15197, -94.00561 (WGS84)
Vertical datum: GEODETIC SURVEY OF CANADA DATUM (LOCAL 1929 ADJ.)
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
Surface elevation	318.73 m	2026-10-19 20:25	Provisional

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How to cite

Environment and Climate Change Canada – Water Survey of Canada: Grassy Narrows Lake at Grassy Narrows (eccc:05QE015). Accessed October 19, 2026 via Nivelmap, https://nivelmap.com/en/canada/ontario/grassy-narrows-lake-at-grassy-narrows

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