River Rea at Calthorpe Park Water Level
Live river level, flow, historical records and forecast for River Rea at Calthorpe Park in England, United Kingdom, built from official government gauge data.
- Location England, United Kingdom
- Primary gauge ea-4039 (Environment Agency)
About River Rea at Calthorpe Park
River Rea at Calthorpe Park is a gauged river in England.
Season by season
The seasonal pattern here is modest. Typical levels are highest in January at 0.21 m (0.67 ft) and lowest in September at 0.12 m (0.38 ft), with a typical annual swing of 9 cm (3.5 in). For someone checking a garden edge, footbridge, or bank-side access point, that is a small but real change across the year.
That fits temperate hydrology: higher water tends to show up in the cooler months, while summer and early autumn are lower. On this river, September is the quietest point in the yearly cycle, so shallow margins and exposed edges are more likely then than in winter.
Records and rises
The record high is 1.44 m (4.72 ft) in September 2008. The record low is 0.06 m (0.21 ft) in August 2022. With 50 years on record, those two points set the range local users have to keep in mind.
For anglers, that spread matters because the river can move from a low, tight summer profile to a much fuller channel. For cottagers and people watching access points, the record high gives the upper end of what has been observed here, while the record low shows how far the water can draw down in a dry spell.
Reading the hero number
The hero number on this page is the current reading set against the median for this calendar day, which is the better comparison than raw elevation alone. A level only means much when you know what is normal for the same date.
That lets you see whether the river is running above or below its usual seasonal position at this station. The station is published by the Environment Agency, and the comparison is especially useful here because the same absolute level can mean something different in January than it does in September.
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.
Water Stories
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How every number is computed - About the platform
