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⤴Unusual rise — FloodRadar+Top 1% rise rate for this gauge.
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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
Current Level
1.445 mASD
▬ Steady
24h Max
1.471 mASD
24h Min
1.419 mASD
Typical Range
1.27 - 4.32
mASD
Highest Recorded
13.34 mASD
28 Feb 2025
Since Dec 1984
Current level is 11% of this
Current Flow
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🚽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.
River Flow
90 days
Daily mean discharge (m³/s) with the daily min–max band, from the EA Hydrology API. Flow is the volume of water passing the gauge — often a more direct flood signal than level.
Flow Data: Daily mean flow (m³/s) to 6 Oct (2 days behind — the EA publishes each day's mean a day or two after it ends; unchecked, provisional)via EA Hydrology
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.
18 storm overflows are traced upstream of this gauge, the nearest 9.4 km away along the river. 0 report discharging now, 17 report not discharging, and for 1 the monitor is offline or has not reported, so their status is not known.
Thames Water · into River Ember And Mole · 30 m away in a straight line · too close to the gauge to say which side
19 spills · 239 hours in 2025
Not discharging now · last
3 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 →
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 Esher flood history.
Flood areas linked to this gauge
Flood warnings and alerts are issued for whole areas. These are the 6 areas linked to this gauge, nearest first.
🌊 Mixed responseA balance of quick runoff and slower groundwater baseflow.
Your catchment is all the land that drains rainfall into the river above this gauge. Its character — how
steep, wet, wooded, urban or chalky that land is — decides how fast rain here turns into a rising river. A steep, bare or clay
catchment is “flashy” (rises and falls quickly, floods easily); a flat, chalk or well-wooded one is
slow and steady. The tiles below put numbers to that; the flow-duration curve reads left-to-right
from the river’s typical high flows (Q5) down to its low flows (Q95) — a steep curve means a flashy river.
The physical character of the land that drains to this gauge, and how it shapes its flood response — from the National River Flow Archive (UKCEH).
Baseflow Index
0.52
mixed response
Avg Annual Rainfall
803 mm/yr
1991–2020 · +5% since 1941–70
Urban Extent
11%
partly urbanised
Median Annual Flood
54.12 m³/s
QMED — typical yearly peak flow
Highest Daily Mean Flow
90.10 m³/s
7 Nov 2000 · daily mean, not the instantaneous peak
Flow-Duration Curve
Daily flow (m³/s) exceeded each % of the time — a steep curve is flashy, a flat one is steady. Q5 high · Q50 median · Q95 low.
Ultrasonic gauging station situation on Mole Flood Aleviation Scheme. Gates upstream and downstream of the section.
More detail
The catchment
A largely impervious catchment divided by the W-E trending ridge of the North Downs (Chalk and Upper Greensand). Diverse land use - rural tracts and considerable suburban development.
The station
New ultrasonic, full range capability and improved reliability. Replaced earlier US just u/s (in a reach created as part of the Mole Flood alleviation Scheme); debris and siltation (blocking transducers) and high temperature gradients caused substantial malfunction particularly at low flows. New gauge is prone to weed in channel, which can cause issues at low flows. Station added to peak flows dataset in September 2022 (WINFAP Files v11).
How it measures flow
Flow and levels are affected by downstream Island Barn Weir and upstream Viaduct Sluice. Both are operated as part of the Lower Mole Flood Aleviation Scheme in high flows.
Flow regime
Responsive regime. Some sewage effluent derives from outside the catchment.
The flow record
Several drop outs in record including December 2016 due to level being dropped downstream to perform channel maintenance work. WY1998/1999 rejected because it is a partial first year of the record, and WY2009/2010 rejected as AMAX likely occured during period of fault with the gauge - GDF infilled.
How this gauging station is built and how long it has measured (NRFA / UKCEH).
Gauge type
Ultrasonic
Operating since
1984
Station datum
10.0 mAOD
Flow record
1984–2024 · 40 yrs · 90% complete
Peak-flow record
since 1998
Hydrometric area
39
Measured by
Environment Agency
Nearby Groundwater
Soil Moisture
Possible storm-overflow correlation
Frequently asked questions
Is the River Mole at Esher flooding today?
The current level is 1.45m, which is within the typical range of 1.27 to 4.32m. Flooding is unlikely at this level.
Is the river level rising or falling at Esher?
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 Mole at Esher?
The typical range at this station is 1.27m to 4.32m, based on Environment Agency historical data. Levels above 4.32m 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:
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