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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.

Saint John River at Gagetown Water Level

Live river level, flow, historical records and forecast for Saint John River at Gagetown in Canada, NB, Canada, built from official government gauge data.

About Saint John River at Gagetown

Saint John River at Gagetown - A key point in the Lower Saint John watershed.

The Saint John River flows gracefully through the heart of New Brunswick, with the monitoring station at Gagetown providing vital data about this significant waterway. Draining an expansive area of approximately 48,900 square kilometres, this river is a central feature of the Lower Saint John - Grand Lake watershed. Nearby, you can find other notable water bodies such as French Lake, Grand Lake, and the Jemseg River, each contributing to the intricate network that sustains the region's biodiversity and water quality.

Why the data matters here

The readings from the Saint John River at Gagetown are essential for understanding the river's behaviour and health throughout the year. Seasonal patterns are strongly influenced by Atlantic hydrology, with spring snowmelt ushering in the potential for freshet conditions and ice-jam risks on the major rivers. As fall approaches, rain can lead to flooding events, which emphasizes the need for close monitoring of river levels.

Today’s water level reading at Gagetown is consistently compared against the median for this calendar day based on more than 31 years of historical data recorded by Water Survey of Canada. Using this comparison is crucial, as it provides context and highlights trends over time, beyond simply tracking raw elevation numbers.

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