Rose 0.09 m since 08:15 — peaked 0.29 at 13:00, now 0.29 and holding
0.29
Wandle Park Main Channel
Wandle
London catchment
• Merton • Greater London • ID: 4180_w1TH • Level
(21m ago) • 4 readings/hr • 171 views
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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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Current Level
0.286 mASD
▲▼ Crested · peaked 0.29
24h Max
0.302 mASD
24h Min
0.194 mASD
Typical Range
0.21 - 0.54
mASD
Highest Recorded
2.00 mASD
EA official record
1.46 in our data (since Mar 1986)
Current level is 14% 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.
Wandle Park Side Channel (4180_w2TH) — level at this site
7 days
A separate gauge 0 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.
Connollys Mill GS (4180TH) — flow at this site
7 days
A separate gauge 7.1 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.
None of the storm overflows FloodRadar holds is traced upstream of this gauge on the mapped river network. That is not the same as none: the map leaves out many small streams and culverts, so an overflow it cannot place may still drain here, and not every company publishes every overflow. Those nearby are listed below.
Nearby, connection not known
Within 6 km in a straight line, but the river map cannot say whether their water passes this gauge.
Thames Water · into Graveney · 2.5 km away in a straight line · its watercourse is not on the river map
0 spills · 0 hours in 2025
Not discharging now
16 more within 6 km whose connection is not known.
10 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 0.54 m
on about 35 days.
This year so far: 15 days.
202615 days so far
202523 days, 1 of them high · 1 high
202448 days, 3 of them high · 3 high
202336 days, 2 of them high · 2 high
202218 days, 3 of them high · 3 high
202149 days, 11 of them high · 11 high
202069 days, 5 of them high · 5 high
201922 days, 3 of them high · 3 high
201835 days, 2 of them high · 2 high
201718 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 0.91 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 11 flood
areas linked to this gauge (nearest 0.3 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 Merton flood history.
Flood areas linked to this gauge
Flood warnings and alerts are issued for whole areas. These are the 11 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 Wandle at Wandle Park Main Channel flooding today?
The current level is 0.29m, which is within the typical range of 0.21 to 0.54m. Flooding is unlikely at this level.
Is the river level rising or falling at Wandle Park Main Channel?
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.
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. Only about 8.4mm of rain has fallen nearby in the last 7 days, so the flow is being sustained mainly by groundwater. 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 Wandle at Wandle Park Main Channel?
The typical range at this station is 0.21m to 0.54m, based on Environment Agency historical data. Levels above 0.54m 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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