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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 mASD/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 data and are best-efforts. Terms
Current Level
0.377 mASD
▬ Steady
24h Max
0.476 mASD
24h Min
0.373 mASD
Typical Range
0.30 - 1.57
mASD
Highest Recorded
1.60 mASD
9 Aug 2002
Since Oct 2001
Current level is 24% of this
🚽Sewage overflows nearby
Recent Water Levels
🌍 floodradar.co.uk
1 day
Prediction V2
Prediction Eris
Nimbus beta
Experimental model fusing soil moisture, river flow, groundwater and catchment
character. Shown with its calibrated 10–90% confidence band. Under evaluation —
not yet promoted, so treat as a second opinion.
Long Term
🌍 floodradar.co.uk
—
Consecutive rainy days0 → 10+
Days Above Normal
This year vs 5-year monthly range
Recent Readings
Steady over 6h
24 Aug 00:00▲ +0.1 cm0.377 mASD
23 Aug 23:45▼ -0.1 cm0.376 mASD
23 Aug 23:30▼ -0.1 cm0.377 mASD
23 Aug 23:15▼ -0.1 cm0.378 mASD
23 Aug 23:00▼ -0.1 cm0.379 mASD
23 Aug 22:45▼ -0.3 cm0.380 mASD
23 Aug 21:30▬ steady0.383 mASD
23 Aug 21:15▬ steady0.383 mASD
23 Aug 21:00▬ steady0.383 mASD
23 Aug 20:45▲ +0.1 cm0.383 mASD
23 Aug 20:30▲ +0.2 cm0.382 mASD
23 Aug 20:15▲ +0.2 cm0.380 mASD
23 Aug 20:00▲ +0.3 cm0.378 mASD
23 Aug 19:45▲ +0.2 cm0.375 mASD
23 Aug 19:30▬ steady0.373 mASD
23 Aug 19:15▼ -0.1 cm0.373 mASD
23 Aug 19:00▼ -0.1 cm0.374 mASD
23 Aug 18:45▼ -0.1 cm0.375 mASD
23 Aug 18:30▼ -0.2 cm0.376 mASD
23 Aug 18:150.378 mASD
Rainfall & Weather
Loading rainfall and weather data...
Flood history near this gauge
Official Environment Agency warnings issued since 2009 for the 6 flood
areas linked to this gauge (nearest 1.0 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 Radlett flood history.
Geographic coordinates may reflect the access point for the gauge, and not the precise location in the watercourse that it is taking readings from.
Nearby Groundwater
Soil Moisture
Possible storm-overflow correlation
🚽 Storm overflows on this river
Frequently asked questions
Is the Radlett Brook at Radlett flooding today?
The current level is 0.38m, which is within the typical range of 0.30 to 1.57m. Flooding is unlikely at this level.
Is the river level rising or falling at Radlett?
Based on the most recent readings, the level is currently steady. The chart above shows the last 7 days of measurements, updated roughly every 15 minutes.
What is a normal level for the Radlett Brook at Radlett?
The typical range at this station is 0.30m to 1.57m, based on Environment Agency historical data. Levels above 1.57m are higher than usually seen and may indicate a flood risk.
How often is this river level data updated?
Readings are taken by the Environment Agency gauge roughly every 15 minutes and FloodRadar refreshes its data continuously, so the level shown is normally less than an hour old.
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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:
