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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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Not an emergency service — if in danger call 999. Alerts rely on
EA/SEPA/NRW data and are best-efforts. Terms
Last Level
0.116 mASD
⚠ 16h ago · may be out of date
24h Max
0.131 mASD
24h Min
0.113 mASD
Typical Range
0.11 - 0.30
mASD
Highest Recorded
0.35 mASD
EA official record
0.35 in our data (since Jun 1989)
🚽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
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.
Wessex Water · into Trib Of Weymouth Bay (Via Sws) · 5.2 km away in a straight line · discharges to the sea, an estuary or tidal water
13 spills · 4 hours in 2025
Not discharging now · last
2 more within 6 km whose connection is not known.
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 →
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 Upwey flood history.
Flood areas linked to this gauge
Flood warnings and alerts are issued for whole areas. These are the 13 areas linked to this gauge, nearest first.
🌊 Groundwater-fedSlow and steady — fed largely by groundwater, so levels change gradually, not in sudden spikes.
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
0.87
groundwater-fed — slow & steady
Avg Annual Rainfall
819 mm/yr
1991–2020 · +7% since 1941–70
Urban Extent
1.1%
largely rural
Median Annual Flood
5.49 m³/s
QMED — typical yearly peak flow
Highest Daily Mean Flow
10.62 m³/s
4 Jan 2014 · 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.
Land Cover (2023)
Woodland 2%Grassland 37%Arable 58%Urban 3%
Grassland 45% → 37% since 1990
Flow affected by: groundwater abstraction.
Photos
Gauging-station photographs from the National River Flow Archive (UKCEH).
Crump weir on the West Avon. Adjacent station on the East Avon also gauges flow as the two meet on the confluence at Upavon.
More detail
The catchment
Predominantly Upper Greensand and Lower Chalk. Small amount of river gravel and alluvium in valley bottom. The remaining geology consists of Upper and Middle Chalk, Clay and some Gault. Upper Chalk and Clay form the northern and extreme southern borders of the catchment. Rural land use. No major catchment changes.
The station
Crump profile weir, crest 4.57m wide constructed just u/s of the confluence of the East and West Avon just north of Upavon. Station adjacent to East Avon at Upavon (43014); the two weirs gauge the two branches of the Avon immediately upstream of their confluence at Upavon.
How it measures flow
Full range station, no drowning but susceptible to algal growth problems. Suspicion of small errors within the stilling well caused by increased buoyancy of the counter weight when submerged - may cause small errors in stage measurement in the order of a few millimeters only. Theoretical, original rating; few high flow spot gaugings to confirm. Upper limit of rating is 0.40m/2.46cumecs. It is extrapolated beyond that limit.
Flow regime
Minor groundwater abstractions in catchment. Frequent hatch activity throughout the flow range with potential for exaggerated or false peaks.
The flow record
High flow on 18/01/2011 - level of 0.586m, modularity was observed at 83.5%. A hydraulic jump was still present and there was no by-passing. Full period of record peak flow data reviewed and released in September 2020 (WINFAP Files v9).
Timing, not cause. Gauges can move together simply because the same rain fell on both.
Frequently asked questions
Is the River Wey at Upwey flooding today?
The current level is 0.12m, which is within the typical range of 0.11 to 0.30m. Flooding is unlikely at this level.
Is the river level rising or falling at Upwey?
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 Wey at Upwey?
The typical range at this station is 0.11m to 0.30m, based on Environment Agency historical data. Levels above 0.30m 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: