FloodRadar
Log inCreate free account

Does PO4 8HU flood?

Not in an at-risk area

PO4 8HU has no properties in any Environment Agency recorded flood-risk band. That is good news — but it is area-level and never proof a place cannot flood (surface-water and sewer flooding are assessed separately). See the at-risk postcodes in PO4 or get the full picture below.

The ground around PO4 8HU

The ground here sits at about 4 m above sea level and falls 10 m across the surrounding 800 m. Surface water reaching this point runs off ground lying to the north, 0.5 m higher.

Shaded relief map of the ground around PO48HU, computed from Environment Agency LiDAR. The ground here sits at about 4 m above sea level and falls 10 m across the surrounding 800 m. Surface water reaching this point runs off ground lying to the north, 0.5 m higher.
Shaded relief of the bare ground within about 400 m of PO4 8HU, computed from the Environment Agency's published LiDAR terrain survey. The ring marks the postcode centre, not a property. This shows the shape of the land, not a flood map — it does not include drains, culverts, walls or kerbs, and the official likelihood band above is the authoritative figure. © Environment Agency copyright and/or database right 2022. All rights reserved.
Instant access · no account needed · 14-day money-back guarantee or see the free preview first
Get the full flood report for PO4 8HU — £19 Free preview first · instant access · no account needed The detail below — flood history, warnings, rivers, overflows — is part of FloodRadar's property flood-risk report. The official band above is free; the preview shows more before you decide.

Inside the full report for PO4 8HU

FloodRadarProperty Flood-Risk Report
PO4 8HU
Moderate flood risk — investigate further

Because 507 official warnings since 2006.

A Today — indicative grade (A best → E)
··· By the 2050s — EA climate scenario (in the full report)
⚑ Official warning within 10 km: Yes ⚑ Recorded flood nearby: No ⚑ Flood defences within 500 m: No ⚑ In flood zone 2 or 3: ···
Rivers & sea
···
Surface water
···
Groundwater
Not assessed
Historic flooding
None within ~1 km
Warning history · flood map with building picker · 2050s view · insurance outlook · every dataset receipt — 18 sections

Flood-risk map of this area

Environment Agency flood-likelihood cells
High (>3.3%/yr) Medium Low Very low Marker = postcode centre Base map © OpenStreetMap contributors

The map above shows the real EA rivers & sea likelihood cells around PO4 8HU. 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.

Official flood warnings near PO4 8HU

507
flood alerts & warnings within 10 km since 2011
61
of them full flood warnings or severe warnings
2026
most recent warning nearby (2026-02-19)

Warnings cover flood areas, not individual addresses.

Named storms that brought flooding here

2013-14 UK winter floods (2013, 82 warnings nearby) · Eleanor (2018, 13 warnings nearby) · Ciara (2020, 11 warnings nearby) · Eunice (2022, 11 warnings nearby)

The rivers that matter for PO4 8HU

GaugeRiverDistanceTypical highHighest on record
West Street River Lavant 8.1 km 7.80 m 7.66 m
Havant Hermitage Stream 8.2 km 6.20 m 6.69 m
Browndown River Alver 8.7 km 1.60 m 1.72 m
Crosslands Drive River Lavant 9.2 km 1.43 m 1.43 m

Live levels, predictions and rain-response behaviour are on each gauge's page and in the property report.

Storm overflows within 5 km

OverflowDischarges intoDistanceSpillsHours
Fort Cumberland Stormwater Tanks Langstone Harbour 1.3 km 13 (2024) 44
Burrfields Road Portsmouth Cso Great Salterns Lake 2.6 km 0 (2024) 0
Holbrook Road/pyning Street Cso Portsmouth Harbour 2.8 km 0 (2024) 0
Green Lane Hayling Island Cso Hayling Bay 4.0 km 1 (2024) 3

Official annual EDM figures — a water-quality signal for local watercourses, not a property flood-risk factor.

Flood defences

No mapped flood-defence assets within 500 m of the postcode centre. Defences reduce risk, never remove it.

What the full property report adds

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.

Flood risk at nearby postcodes

PO4 8DZ up to Low PO4 8HR up to Low PO4 8HY up to Low PO4 8LL up to Medium PO4 8LS up to High PO4 8LT up to High

At-risk postcodes near PO4 8HU — all in the PO4 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. Recorded Flood Outlines and warning history © Environment Agency copyright and/or database right 2025. Storm-overflow figures: EA Event Duration Monitoring. 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 PO4 district.