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Does GU33 7AU flood?

Up to Low likelihood

Properties in GU33 7AU sit in the Environment Agency's Low 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 bandAnnual chancePropertiesOf which homes
Highgreater than 3.3%00
Medium1% – 3.3%00
Low0.1% – 1%1010
Very lowbelow 0.1%00

Over a 25-year mortgage, a property in a low-likelihood area has a 2–22% chance of flooding at least once.

The ground around GU33 7AU

The ground here sits at about 66 m above sea level and falls 14 m across the surrounding 800 m. Surface water reaching this point runs off ground lying to the west-north-west, 1.1 m higher.

Shaded relief map of the ground around GU337AU, computed from Environment Agency LiDAR. The ground here sits at about 66 m above sea level and falls 14 m across the surrounding 800 m. Surface water reaching this point runs off ground lying to the west-north-west, 1.1 m higher.
Shaded relief of the bare ground within about 400 m of GU33 7AU, 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.
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Get the full flood report for GU33 7AU — £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 GU33 7AU

FloodRadarProperty Flood-Risk Report
GU33 7AU
Lower flood risk — standard checks apply

Because properties in the low likelihood band; 21 official warnings since 2006.

C 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: Yes ⚑ In flood zone 2 or 3: ···
Rivers & sea
Up to Low
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 GU33 7AU. 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 GU33 7AU

21
flood alerts & warnings within 10 km since 2013
13
of them full flood warnings or severe warnings
2026
most recent warning nearby (2026-01-27)

Warnings cover flood areas, not individual addresses.

Named storms that brought flooding here

Henk (2024, 5 warnings nearby) · 2013-14 UK winter floods (2013, 5 warnings nearby) · Chandra (2026, 2 warnings nearby) · Dennis (2020, 1 warnings nearby)

The rivers that matter for GU33 7AU

GaugeRiverDistanceTypical highHighest on record
Princes Marsh River Rother 1.7 km 0.90 m 1.96 m
Winchester Road Petersfield Stream 6.2 km 66.10 m 66.22 m
Borough Grove Petersfield Stream 6.8 km 60.30 m 60.30 m
Passfield Mill River Wey 7.1 km 1.28 m 1.71 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
Station Road Liss Cso River Rother 0.9 km 6 (2024) 22
Liss Wastewater Treatment Works River Rother & Batt's Brook 1.8 km 79 (2024) 878

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

Flood defences

1 mapped flood-defence asset within 500 m — nearest ~151 m (natural high ground). 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

GU33 7AA up to Low GU33 7AD up to Medium GU33 7AE up to High GU33 7AF up to High GU33 7AG up to High GU33 7BB up to High GU33 7BD up to Low GU33 7BH up to Medium GU33 7BJ up to Low GU33 7DW up to High GU33 7FF up to Low GU33 7JX up to Low

At-risk postcodes near GU33 7AU — all in the GU33 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 GU33 district.