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⤴Unusual rise — FloodRadar+Top 1% rise rate for this gauge.
Height for "Above a height"
Drag the line on the chart, or type a value:mASD
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You'll be notified when this gauge is rising more than 0.10 m/hr — a sign of rapidly increasing water levels.
You'll be notified when a new storm-overflow (sewage) discharge starts within ~3 km of this gauge, based on the water companies' near-real-time feeds.
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Not an emergency service — if in danger call 999. Alerts rely on
EA/SEPA/NRW data and are best-efforts. Terms
Last Level
0.307 mASD
⚠ 2h ago · may be out of date
24h Max
0.325 mASD
24h Min
0.276 mASD
Typical Range
0.32 - 0.62
mASD
Highest Recorded
1.24 mASD
EA official record
A 1.52 reading (1 Jan 2014) sits in our unverified raw history and is not treated as the record
Current level is 25% of this
🚽Sewage overflows nearby
Recent Water Levels
🌍 floodradar.co.uk
1 day
EA forecast (official)
Prediction V2
Prediction Eris
Nimbus beta
Experimental model fusing soil moisture, river flow, groundwater and catchment
character. The shaded band is its 10–90% range, widened so that about 80% of recent outcomes fall inside it.
Under evaluation — not yet promoted, so treat as a second opinion.
THORNBOROUGH MILL SLUICE AUTOMATION (E24964) — flow at this site
7 days
A separate gauge 8.6 m from this one at the same site, shown here for context.
Its readings are its own and are never merged with this page's.
Storm overflows whose water reaches this gauge on the mapped river network, nearest first by distance along the river. The status is each water company's monitor: it says whether an overflow is discharging, not how much or what it contains.
11 storm overflows are traced upstream of this gauge, the nearest 7.0 km away along the river. 0 report discharging now, 9 report not discharging, and for 2 the monitor is offline or has not reported, so their status is not known.
Anglian Water · into Beachampton Brook · 5.1 km away in a straight line · its watercourse is not on the river map
36 spills · 571 hours in 2025
Not discharging now · last
1 other overflow within 6 km is downstream of this gauge or on another branch of the river network, so it is not listed.
These are the water companies' monitor statuses; a spill does not by itself explain a change in the gauge level. River connections and distances are traced on OS Open Rivers (edition 2026-04), which leaves out many small channels. Explore the sewage map →
In a typical year this gauge reaches its typical high of 0.62 m
on about 7 days.
This year so far: 2 days.
20262 days, 1 of them high · 1 highso far
20256 days, 2 of them high · 2 high
202423 days, 19 of them high · 19 high
20231 day, 1 of them high · 1 high
20220 days
20218 days, 2 of them high · 2 high
202010 days, 8 of them high · 8 high
20196 days, 3 of them high · 3 high
20183 days
20172 days, 1 of them high · 1 high
Counted from each day's highest reading. Days with missing or implausible readings are left out.
The darker part is days above 0.75 m, the level this gauge tops only a few days a year.
Flood history near this gauge
Official Environment Agency warnings issued since 2016 for the 7 flood
areas linked to this gauge (nearest 1.2 km away).
Warnings apply to a whole flood area, not necessarily this exact spot. Years before 2006 aren't covered by the EA's historic record.
See also the Thornborough flood history.
Flood areas linked to this gauge
Flood warnings and alerts are issued for whole areas. These are the 7 areas linked to this gauge, nearest first.
Timing, not cause. Gauges can move together simply because the same rain fell on both.
Frequently asked questions
Is the River Great Ouse at Thornborough flooding today?
The current level is 0.31m, which is below the typical range. Flooding is very unlikely at this level.
Is the river level rising or falling at Thornborough?
Based on the most recent readings, the level is currently falling slightly. The chart above shows the last 12 hours of measurements by default (up to 7 days), updated roughly every 15 minutes.
Why is the level slowly falling?
When little or no rain has fallen for a while, a river level gradually drops as the water stored in the ground and soil drains away with nothing to replace it. This is called baseflow recession and is normal in dry spells. A gentle decline like this is expected and is not a sign of a problem — downstream gauges often recede a little faster than headwaters further upstream, and levels recover once rain returns.
What is a normal level for the River Great Ouse at Thornborough?
The typical range at this station is 0.32m to 0.62m, based on Environment Agency historical data. Levels above 0.62m are higher than usually seen and may indicate a flood risk.
How often is this river level data updated?
Readings are supplied by the Environment Agency gauge. FloodRadar checks for updates roughly every 15 minutes; the timestamp above shows how recent the latest available reading is.
Embed this gauge on your website
Free live river-level widget — ideal for parish councils, angling clubs and local sites. Updates automatically.
Preview
📮 Flood risk by postcode near this gauge
Postcodes within 5 km with properties in the Environment Agency’s rivers-and-sea flood-risk bands:
FloodRadar
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