The Roxbourne at Harrow, Thistledene Avenue Water Level
Live river level, flow, historical records and forecast for The Roxbourne at Harrow, Thistledene Avenue in England, United Kingdom, built from official government gauge data.
- Location England, United Kingdom
- Primary gauge ea-3626TH (Environment Agency)
About The Roxbourne at Harrow, Thistledene Avenue
The Roxbourne at Harrow, Thistledene Avenue is a gauged river in England.
The watershed
This station has 24 years on record from the Environment Agency. The seasonal pattern is modest but clear: the highest typical month is January at 0.06 m (0.18 ft), and the lowest typical month is June at 0.04 m (0.12 ft). That leaves a typical annual swing of 1.9 cm (0.7 in), so day-to-day changes are usually small at this gauge.
For people living near the channel or watching it for access, that means the water level is often close to a narrow band for much of the year. The record still shows larger departures when conditions line up. The record high is 0.59 m (1.92 ft), set in November 2002. The record low is -0.11 m (-0.36 ft), set in July 2005.
What the numbers say
The seasonal high in January fits a temperate river with its wet season influence showing up in winter. June is the low month in the record summary, which is the part of the year when a shallow channel can matter most for small craft, bank access, and anything that sits close to the waterline.
The gap between the typical months is small, but the extremes are not. A rise to 0.59 m (1.92 ft) is well above the usual monthly values, while -0.11 m (-0.36 ft) shows that this gauge can sit below zero in dry periods. If you use the river for fishing or for a waterside intake, the record is a reminder to watch both ends of the range, not just the average.
Reading the hero number
The hero number on this page is meant to compare today’s reading with the median for the same calendar day across the station’s record. That is more useful than a raw level because it puts today in context: a simple height by itself does not say whether the river is running typical, high, or low for this date.
At this site, that comparison is based on more than 24 years of record from the Environment Agency.
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
Nibi Metrics - live water levels, flow, and forecasts for lakes and rivers across Canada, the US and the UK
Real-time water levels, forecasts, and alerts for lakes and rivers across Canada, the US and the UK. Built on official government data.
Nibi Metrics tracks more than 13,000 gauged lakes and rivers across Canada, the United States and the United Kingdom, reading directly from official federal monitoring networks: the Water Survey of Canada, the United States Geological Survey, Quebec's provincial hydrometric network, and the Environment Agency for England. Every number on the platform is measured, not modelled - taken from a government gauge on the water itself and compared against that location's own historical record for this exact date.
What you can see for any monitored lake or river
The level right now, in feet or metres, updated as the source agency publishes new readings - for many stations that is every five to fifteen minutes. How today compares to typical: every location carries its own typical-for-this-date band built from its historical record, so a reading is never just a number - it is above, below, or near what this water usually does on this calendar day. Which way it is moving: a measured RISING, FALLING, or STEADY verdict computed from the gauge's own recent readings, with the rate of change - the difference between a flood ending and one beginning. What comes next: level forecasts up to 72 hours ahead, driven by the gauge's recent behaviour, upstream water, and quantitative precipitation forecasts, alongside live radar, lightning, and weather for the surrounding region.
Alerts that watch the water for you
Set a threshold on any location - a level, a distance above typical, or a rate of climb - and Nibi emails or notifies you the moment the gauge crosses it. Cottagers use it for spring freshet, anglers for river conditions, marinas and municipalities for operations. The scanning runs around the clock against the same measured data shown on every page.
Where Nibi comes from
Nibi means water in Anishinaabemowin. The platform began at a family cottage on Lake Muskoka, Ontario, where the spring melt floods the shoreline most years and the only forecast was standing on the dock, looking, and guessing. It grew into an independent, member-funded platform run by Muskoka Research Inc. - no investors, no data resale, and a privacy policy shorter than most cookie banners. The core data is free for everyone, forever; paid plans add automation like multi-location alerts, deep history, and reports.
Coverage
Nibi spans the continent: every Canadian province and territory with active federal gauges - from Vancouver Island rivers to the Muskoka lakes, prairie reservoirs, and Quebec's hydrometric network - and the United States from Maine to the Texas Hill Country, the Ohio Valley, and the Pacific Northwest. Coverage grows where the water news is: when a basin floods, its gauges join the platform with their full historical records attached. Many stations report every five to fifteen minutes; most report at least hourly; every page states exactly when its gauge last spoke.
Free forever, funded by members
The core promise is simple: the water data is free, for everyone, forever. Live levels, maps, radar, and recent history never sit behind a paywall. Paid plans fund the platform by adding automation - multi-location alerts, decades of history, longer forecasts, and PDF reports - so the people who need more carry the cost for everyone who just needs to check the lake before driving up. There are no investors and no advertising deals shaping what the data says.
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