This gauge is tidally influenced — levels rise and fall with each tide, so rapid changes here
are normal and don't necessarily indicate flooding.
(1h ago) • 4 readings/hr • 316 views
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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
-0.870 mAOD
▲ Rising (+49cm/hr)
24h Max
3.143 mAOD
24h Min
-1.423 mAOD
Typical Range
-
Highest Recorded
4.95 mAOD
EA official record
A 32.34 reading (22 Sep 2022) sits in our unverified raw history and is not treated as the record
ⓘ
Flood alert
Hunstanton coast in Norfolk
Strong winds and large waves tomorrow morning may lead to flooding.
Flooding is possible from 03:15 to 07:15 on Thursday 8th October.
Locations most affected will be low lying land and roads near rivers or on the coast, with spray being seen on the seafront paths. Flood gates in the area will be closed by the Local Authority which will make access difficult. Please take notice of the Flood Sign at the top of South Beach Road. The detailed forecast is for a peak level at King's Lynn of 3.42mAODN at 05:15, on 8 October, which is 0.28m above tide tables, Wind Force 6, North Westerley. Tomorrow evening's tide is not expected to reach alert thresholds. Be aware tides will remain high over the next couple of days.
We are closely monitoring the situation .
Avoid beaches and coastal promenades, which may be flooded.
This message will be updated by 9:00AM on Thursday 08 October or as the situation changes.
Flood predictions aren't generated for
tidal gauges —
their levels are driven by the tide,
not by catchment rainfall, so the forecast models would have no skill here.
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.
162 storm overflows are traced upstream of this gauge, the nearest 530 m away along the river. 0 report discharging now, 150 report not discharging, and for 12 the monitor is offline or has not reported, so their status is not known.
Anglian Water · into Tidal River Great Ouse · 710 m away in a straight line · discharges to the sea, an estuary or tidal water
2 spills · 1 hours in 2025
Not discharging now · last
4 more within 6 km whose connection is not known.
2 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 King's Lynn flood history.
Flood areas linked to this gauge
Flood warnings and alerts are issued for whole areas. These are the 9 areas linked to this gauge, nearest first.
Is the River Great Ouse at King's Lynn flooding today?
The latest recorded level is -0.87m. Compare it with the recent history on the chart above to judge whether levels are unusually high.
Is the river level rising or falling at King's Lynn?
Based on the most recent readings, the level is currently rising. 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 6.0mm 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.
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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