Cam and Ely Ouse (Including South Level) catchment
• Grantchester • Cambridgeshire • ID: E21732 • Level
(21m ago) • 3 readings/hr • 143 views
Set water level alerts
Get notified about Cambridge Byron's Pool — tick as many as you like, they all share the notify settings below.
Alert me when (tick one or more)
⤴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
Quick pick:
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.
Notify by (tick one or more)
Your browser will ask permission, then you'll get a notification even when FloodRadar isn't open.
On iPhone: tap Share → Add to Home Screen first, then open it from there and set the alert. Show me how
Each one is saved as its own alert — pause or remove them individually any time.
Not an emergency service — if in danger call 999. Alerts rely on
EA/SEPA/NRW data and are best-efforts. Terms
Current Level
0.450 mASD
▬ Steady
24h Max
0.453 mASD
24h Min
0.448 mASD
Typical Range
0.48 - 0.65
mASD
Highest Recorded
1.63 mASD
EA official record
1.14 in our data (since Nov 2012)
Current level is 28% 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. The nearest rain gauge has sent no readings in the last day, so Nimbus has no recent measured rain to work from here.
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.
12 storm overflows are traced upstream of this gauge, the nearest 9.4 km away along the river. 0 report discharging now, 11 report not discharging, and for 1 the monitor is offline or has not reported, so their status is not known.
Anglian Water · into Tit Brook · 3.9 km away in a straight line · no mapped watercourse close enough to be sure
18 spills · 190 hours in 2025
No live feed for this overflow
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 0.65 m
on about 18 days.
This year so far: 9 days.
20269 days so far
20255 days
202454 days, 17 of them high · 17 high
202327 days, 4 of them high · 4 high
20222 days
202122 days, 9 of them high · 9 high
202013 days, 3 of them high · 3 high
20193 days patchy data
20189 days, 1 of them high · 1 highpatchy data
20173 days
Counted from each day's highest reading. Days with missing or implausible readings are left out, so a year marked patchy may have run high more often than shown.
The darker part is days above 0.92 m, the level this gauge tops only a few days a year.
Flood history near this gauge
Official Environment Agency warnings issued since 2012 for the 14 flood
areas linked to this gauge (nearest 1.3 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 Grantchester flood history.
Flood areas linked to this gauge
Flood warnings and alerts are issued for whole areas. These are the 14 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 Rhee at Cambridge Byron's Pool flooding today?
The current level is 0.45m, which is below the typical range. Flooding is very unlikely at this level.
Is the river level rising or falling at Cambridge Byron's Pool?
Based on the most recent readings, the level is currently steady. 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 Rhee at Cambridge Byron's Pool?
The typical range at this station is 0.48m to 0.65m, based on Environment Agency historical data. Levels above 0.65m 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
Log inCreate free account