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Ganaraska River near Osaca water level

River gauge, Ganaraska River, Ontario, Canada

Directions

Low for mid-October

Water level

0.37m Steady over the last 24 hours

Flow
0.55 m³/s
0.35 0.40 0.45 0.50

History

0.400.450.50mOct 12Oct 14Oct 15Oct 17Oct 190.400.450.50mOct 12Oct 15Oct 19
0.40.5mSep 19Sep 26Oct 4Oct 11Oct 190.40.5mSep 19Oct 4Oct 19
0.40.6mOct 2025Jan 2026Apr 2026Jul 2026Oct 20260.40.6mOct 2025Apr 2026Oct 2026
0.40.6mJanMarMayJulSepNov20260.40.6mJanAprJulOct2026

20252026

Water level Normal range (10–90 %)

What this means

Low water at Ganaraska River near Osaca: the gauge reads 0.37 m, below normal for mid-October.

The median for mid-October is 0.44 m, based on 20 years of readings, so the water level is 0.07 m below typical. On the same day last year the reading was 0.36 m, a difference of +0.01 m.

It has barely moved over the past 24 hours. Without real rain upstream, that is unlikely to change quickly. The 30-day range is 0.35 m – 0.53 m.

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

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

Key numbers

Median for this date
0.44 m0.07 m below the median for this date
Normal for this date
0.37 m – 0.50 m8 years in 10 fall in this range (20 years of records)
Same day last year
0.36 m+0.01 m
Lowest and highest in 30 days
0.35 m – 0.53 m
Lowest and highest in 12 months
0.35 m – 0.44 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 Ganaraska River

Ganaraska River

The Ganaraska River is a river in Northumberland County and the Regional Municipality of Durham in Southern Ontario, Canada. It is part of the Great Lakes Basin, and is a tributary of Lake Ontario, which it reaches at the central community of the municipality of Port Hope. The river's name is thought to be derived from Ganaraske, the Cayuga name for the village this Iroquoian nation had established in this area in 1779.

Read more on Wikipedia

Text and image from Wikipedia and Wikimedia Commons, licensed under CC BY-SA.

Weather at the gauge

Rain in the last 3 days: 4.0 mm. Rain that falls upstream can take hours or days to show up at a river gauge.

19 Mon 19° 5° – Wind 15 km/h
20 Tue 15° 6° – Wind 20 km/h
21 Wed 13° 3° – Wind 11 km/h
22 Thu 18° 5° – Wind 13 km/h
23 Fri 13° 4° – Wind 15 km/h
24 Sat 14° 3° – Wind 13 km/h
25 Sun 16° 8° – Wind 29 km/h

Forecast: Open-Meteo

Sunrise 07:34 AM Sunset 06:25 PM Daylight 10 hr, 51 min First quarter 57%

Map

Other gauges on the Ganaraska River

Gauge Level Compared with normal 24 hours Distance
Ganaraska River above DaleRiver gauge, Ganaraska River 0.96 m Low ±0 9.1 km

Nearby gauges

Gauge Level Compared with normal 24 hours Distance
North West Ganaraska River near OsacaRiver gauge, North West Ganaraska River 2.48 m Normal ±0 0.2 km
Baxter Creek at MillbrookRiver gauge, Baxter Creek 2.42 m Low ±0 15 km
Wilmot Creek near LeskardRiver gauge, Wilmot Creek 1.15 m Normal ±0 16 km
Wilmot Creek near NewcastleRiver gauge, Wilmot Creek 3.52 m Low ±0 17 km
Cobourg Brook near Precious CornersRiver gauge, Cobourg Brook 2.47 m Very high +0.01 m 18 km
Mackie Creek near HamptonRiver gauge, Mackie Creek 2.83 m Very low ±0 20 km
Cobourg Brook at CobourgRiver gauge, Cobourg Brook 6.42 m Normal ±0 21 km
Baltimore Creek at BaltimoreRiver gauge, Baltimore Creek 1.35 m Very low ±0 23 km

Questions and answers

Is the Ganaraska River near Osaca higher than last year?

Yes, it is 0.01 m higher than on the same day last year, when the reading was 0.36 m.

What is a normal level for the Ganaraska River near Osaca in mid-October?

The median for mid-October is 0.44 m. In 8 years out of 10 the reading falls between 0.37 m and 0.50 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 0.37 m on the gauge does not mean the water is that deep.

What is the water level of Ganaraska River near Osaca today?

On Oct 19, 2026, 03:55 AM EDT, the water level was 0.37 m. Steady over the last 24 hours.

Is Ganaraska River near Osaca rising or falling?

Steady over the last 24 hours. Steady over the last 7 days.

Is the level of Ganaraska River near Osaca normal?

Low 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:02HD003 (Agency page)
Coordinates
44.01514, -78.43747 (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

ParameterLast valueTime (UTC)Quality
Water level 0.37 m 2026-10-19 07:55 Provisional
Flow 0.55 m³/s 2026-10-19 07:55 Provisional

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How to cite

Environment and Climate Change Canada – Water Survey of Canada: Ganaraska River near Osaca (eccc:02HD003). Accessed October 19, 2026 via Nivelmap, https://nivelmap.com/en/canada/ontario/ganaraska-river-near-osaca

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