FloodRadar
Log inCreate free account
FloodRadar
Log inCreate free account
Caister-on-Sea, Norfolk
Up to Medium likelihood
Properties in NR30 5BS sit in the Environment Agency's Medium flood-likelihood band (worst property). The band is the worst found in the postcode — it describes the land around properties (defence-adjusted, rivers & sea), not any single address, and not today's conditions.
| Likelihood band | Annual chance | Properties | Of which homes |
|---|---|---|---|
| High | greater than 3.3% | 0 | 0 |
| Medium | 1% – 3.3% | 1 | 1 |
| Low | 0.1% – 1% | 1 | 1 |
| Very low | below 0.1% | 0 | 0 |
Over a 25-year mortgage, a property in a medium-likelihood area has a 22–57% chance of flooding at least once.
NR30 5BS gets about 600 mm of rain a year on average (wettest month October, 65 mm; driest April, 32 mm). That is 48% drier than the UK as a whole, which averages 1,163 mm a year.
A thirty-year average for the surrounding area, not a measurement at this address and not a flood risk on its own: a dry area floods when a storm sits over it, and a wet one may drain away perfectly well. Source: Met Office HadUK-Grid 1991–2020 (5 km grid), 1.1 km away. Average rainfall: HadUK-Grid v1.3.2, Met Office. Contains public sector information licensed under the Open Government Licence v3.0.
The river map has no watercourse within 1 km of the centre of NR30 5BS.
That means this spot is not on the river map, not that there is no water here: Ordnance Survey’s river map (OS Open Rivers) leaves out small streams, ditches and culverts. Contains OS data © Crown copyright and database rights 2026.
Because properties in the medium likelihood band; 2 recorded flood outlines mapped nearby; 111 official warnings since 2006.
The map above shows the real EA rivers & sea likelihood cells around NR30 5BS. The small panels are illustrative previews of the report's per-layer map views — the full report draws each layer for real, plus recorded extents, defences and a building picker on an interactive map.
Warnings cover flood areas, not individual addresses.
| Date | Mapped flood extent | Approx. distance |
|---|---|---|
| Dec 2013 | 2013 Flood Outline | ~45.9 km |
| Jan 1953 | 1953 Coast Flood Outline Norfolk | ~56.2 km |
These are extents the Environment Agency has mapped, not a list of every flood. Records, not floods: no outline on the record is not evidence a place has not flooded. The full report tests whether any extent covered the exact spot.
2013-14 UK winter floods (2013, 15 warnings nearby) ▶ replay it here · Corrie (2022, 2 warnings nearby) ▶ replay it here · Bram (2025, 1 warnings nearby) ▶ replay it here · Amy (2025, 1 warnings nearby) ▶ replay it here
| Gauge | River | Distance | Typical high | Highest on record |
|---|---|---|---|---|
| Three Mile House | River Bure | 2.5 km | 1.60 m | 1.93 m |
| Great Yarmouth | Norfolk Coast | 7.7 km | — | 3.32 m |
| Burgh Castle | River Yare | 8.8 km | 1.60 m | 2.36 m |
| Repps | River Thurne | 12.5 km | 0.78 m | 0.93 m |
Live levels, predictions and rain-response behaviour are on each gauge's page and in the property report.
| Overflow | Discharges into | Distance | Spills | Hours |
|---|---|---|---|---|
| Caister- Headworks Ps | Ditch To Marsh Drain System | 0.7 km | 10 (2024) | 13 |
| North Denes/jellicoe Road Pumping S | Tidal River Bure | 1.6 km | 38 (2024) | 42 |
| Tar Works Road Sps | Tidal River Bure | 2.3 km | 58 (2024) | 99 |
| Caister- Headworks Ps | North Sea | 2.7 km | 71 (2024) | 430 |
Official annual EDM figures — a water-quality signal for local watercourses, not a property flood-risk factor.
No mapped flood-defence assets within 500 m of the postcode centre. Defences reduce risk, never remove it.
The interactive flood-risk map with a building picker (your exact house, not the postcode), the 2050s climate view, surface-water and planning flood zones at your building, exact recorded-flood distances, year-by-year warning charts, watercourses including culverted streams, an insurance outlook with the Flood Re rules, and a printable document with every dataset receipt — start with the free preview, unlock for £19.
At-risk postcodes near NR30 5BS — all in the NR30 district.
© Environment Agency copyright and/or database right 2025. All rights reserved. Some features of this map are based on digital spatial data from the Centre for Ecology & Hydrology, © NERC (CEH). © Crown Copyright and Database Rights 2025 OS AC0000807064. This product is produced in part from PAF® and Multiple Residence Data, the copyright in which is owned by Royal Mail Group Limited and/or Royal Mail Group plc. All rights reserved. Licence number AC0000807064. Place names: Contains OS data © Crown copyright and database rights 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026. Contains National Statistics data © Crown copyright and database right 2026. Licensed under the Open Government Licence v3.0. Recorded Flood Outlines and warning history © Environment Agency copyright and/or database right 2025. Storm-overflow figures: EA Event Duration Monitoring (England); live overflow status © the water companies, incl. Dŵr Cymru Welsh Water and Scottish Water. Flood defences © Environment Agency (OGL v3). This page summarises public area-level data — it is not a flood-risk survey and not a substitute for the official GOV.UK service. All data sources & licences. More postcodes: the NR30 district.