Arun and Western Streams catchment
• Bosham • West Sussex • ID: E11090 • Level
(40m ago) • 3 readings/hr • 164 views
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⤴Unusual rise — FloodRadar+Top 1% rise rate for this gauge.
Height for "Above a height"
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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
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Current Level
0.227 mASD
▬ Steady
24h Max
0.242 mASD
24h Min
0.227 mASD
Typical Range
0.02 - 0.75
mASD
Highest Recorded
1.00 mASD
EA official record
0.54 in our data (since Dec 2018)
Current level is 23% 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.
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.
Southern Water · into Chichester Hbr Via Little Deep · 4.7 km away in a straight line · its watercourse is not on the river map
12 spills · 119 hours in 2025
Not discharging now · last
1 more within 6 km whose connection is not known.
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 →
This gauge rarely reaches its typical high of 0.75 m:
0 days since 2018.
This year so far: 0 days.
20260 days so far
20250 days
20240 days
20230 days
20220 days
20210 days
20200 days
20190 days
20180 days patchy data
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.
Flood history near this gauge
Official Environment Agency warnings issued since 2011 for the 33 flood
areas linked to this gauge (nearest 0.1 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 Bosham flood history.
Flood areas linked to this gauge
Flood warnings and alerts are issued for whole areas. These are the 33 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 Bosham Stream at Bosham Moreton Road flooding today?
The current level is 0.23m, which is within the typical range of 0.02 to 0.75m. Flooding is unlikely at this level.
Is the river level rising or falling at Bosham Moreton Road?
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 Bosham Stream at Bosham Moreton Road?
The typical range at this station is 0.02m to 0.75m, based on Environment Agency historical data. Levels above 0.75m 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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