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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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Last Level
0.091 mASD
⚠ 3h ago · may be out of date
24h Max
0.091 mASD
24h Min
0.061 mASD
Typical Range
0.08 - 0.37
mASD
Highest Recorded
1.17 mASD
EA official record
1.17 in our data (since Nov 2012)
Current level is 8% 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.
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.
43 storm overflows are traced upstream of this gauge, the nearest 9.9 km away along the river. 0 report discharging now, 36 report not discharging, and for 7 the monitor is offline or has not reported, so their status is not known.
Anglian Water · into Ouse (Newport Pagnell To Roxton) · 5.6 km away in a straight line · several watercourses close by, nothing to choose between them
5 spills · 18 hours in 2025
Not discharging now · last
2 other overflows within 6 km are downstream of this gauge or on another branch of the river network, so they are 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 0.37 m
on about 10 days.
This year so far: 0 days.
20260 days so far
20252 days, 2 of them high · 2 high
202421 days, 20 of them high · 20 high
20230 days
20221 day
202162 days, 14 of them high · 14 high
20206 days, 3 of them high · 3 high
20192 days, 1 of them high · 1 high
20180 days
20170 days
Counted from each day's highest reading. Days with missing or implausible readings are left out.
The darker part is days above 0.46 m, the level this gauge tops only a few days a year.
Flood history near this gauge
Official Environment Agency warnings issued since 2008 for the 10 flood
areas linked to this gauge (nearest 1.7 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 Olney flood history.
Flood areas linked to this gauge
Flood warnings and alerts are issued for whole areas. These are the 10 areas linked to this gauge, nearest first.
The current level is 0.09m, which is within the typical range of 0.08 to 0.37m. Flooding is unlikely at this level.
Is the river level rising or falling at Olney?
Based on the most recent readings, the level is currently rising slightly. The chart above shows the last 12 hours of measurements by default (up to 7 days), updated roughly every 15 minutes.
What is a normal level for the River Great Ouse at Olney?
The typical range at this station is 0.08m to 0.37m, based on Environment Agency historical data. Levels above 0.37m 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.
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📮 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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