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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
0.069 mASD
▬ Steady
24h Max
0.073 mASD
24h Min
0.063 mASD
Typical Range
0.03 - 0.92
mASD
Highest Recorded
1.63 mASD
EA official record
1.63 in our data (since Nov 2018)
Current level is 4% 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.
FROGMILL GS (E12022) — flow at this site
7 days
A separate gauge 9 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.
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.
1 storm overflow is traced upstream of this gauge, the nearest 2.3 km away along the river. 0 report discharging now, 1 reports not discharging.
Southern Water · into Tributary Of River Itchen · 3.7 km away in a straight line · its watercourse is not on the river map
11 spills · 93 hours in 2025
Not discharging now · last
4 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 →
In a typical year this gauge reaches its typical high of 0.92 m
on about 3 days.
This year so far: 7 days.
20267 days so far
20253 days
20246 days
20236 days
20220 days
20212 days
20202 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 11 flood
areas linked to this gauge (nearest 1.9 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 Curdridge 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.
The current level is 0.07m, which is within the typical range of 0.03 to 0.92m. Flooding is unlikely at this level.
Is the river level rising or falling at Frogmill?
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 Hamble at Frogmill?
The typical range at this station is 0.03m to 0.92m, based on Environment Agency historical data. Levels above 0.92m 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.
Embed this gauge on your website
Free live river-level widget — ideal for parish councils, angling clubs and local sites. Updates automatically.
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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:
FloodRadar
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