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Nibi Metrics

Real-time water levels, forecasts, and alerts for lakes and rivers across Canada and the US. Built on official government data.

Nibi Metrics turns raw gauge readings from official hydrometric networks into something a person standing on a dock can actually use: is the water high or low for today, which way is it moving, and how unusual is this? This page explains where every number on the platform comes from and what we do to it along the way.

Water Stories

The flood of record that was overtaken

For five years, spring 2019 was the mark every Lake Muskoka decision answered to. In April 2026 the lake went two centimeters higher - and the official books have not caught up yet.

Why the Assiniboine floods every spring

Inside the freshet cycle that puts Manitoba shorelines at risk each year - and why 2026 broke the script.

How snowpack becomes summer water

The science of snow water equivalent and why it drives the season ahead.

Reading a staff gauge like a hydrologist

What the numbers on the measuring stick actually tell you.

Flash Flood Alley: how Texas rivers rise in hours

Why Central and South Texas rivers go from gravel beds to fifty-year records in an afternoon - including July 2026 on the Nueces.

What a "100-year flood" actually means

One percent, every year, forever - unwrapping hydrology's most misunderstood phrase, and how it differs from our own percentiles.

Rideau River above Rideau Falls Water Level

Live river level, flow, historical records and forecast for Rideau River above Rideau Falls in Canada, ON, Canada, built from official government gauge data.

About Rideau River above Rideau Falls

Rideau River above Rideau Falls - A flowing stretch of the Rideau watershed.

The Rideau River above Rideau Falls is an essential segment of the Rideau watershed in Ontario. This river stretch captures the water's journey, pooling together tributaries and runoff from an expansive drainage area of approximately 3,860 square kilometres upstream of the gauge. The river plays a vital role in the local ecosystem and supports communities along its banks.

The watershed context

Nestled in the region's diverse landscapes, the Rideau River connects a chain of waterways, with notable peers including Kemptville Creek near Kemptville, and the main stem of the Rideau River flowing towards Ottawa. Each of these bodies of water contributes to the larger hydrological framework, feeding into the rich basin that characterizes this area. Given the snowmelt-driven seasonal hydrology typical of Ontario, the Rideau River showcases significant fluctuations in water levels, particularly during the spring freshet which occurs late April through May, followed by natural reductions during the summer months as evaporation and low inflow take their toll.

Why the data matters here

Today's water reading from the Rideau River above Rideau Falls provides an important benchmark in gauging the river's health and behavior. By comparing current levels against the median for this calendar day over the station's historical record of 14 years, we gain insights into seasonal trends and potential flood risks. This information, gathered by Water Survey of Canada, is critical for understanding the river's response to annual climatic cycles, ensuring residents, anglers, and farmers can adapt their activities accordingly.

How this page is built

Readings come from official government gauges and are rolled into daily records: the daily mean, high and low for every day on record. Each calendar day gets its own baseline from the full history, so the level you see is compared against what this specific date usually looks like rather than an annual average.

How Nibi Metrics works · Water stories