Does GU11 flood?

Yes — parts of the GU11 district carry real flood risk: 15 of its 16 at-risk postcodes reach the Environment Agency's High likelihood band. The GU11 postcode district covers Aldershot Park, Rowhill, Wellington, Manor Park, close to Ash, Farnham, Tilford, and surrounding villages in parts of Hampshire and Surrey.

16 postcodes in the GU11 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 15 high, 1 low. A postcode not listed here has no properties in any recorded risk band (which is good news, but never proof it cannot flood).

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Which GU11 postcodes are at risk?

GU11 2PT up to High GU11 2PU up to High GU11 2PX up to High GU11 3LR up to High GU11 3LT up to High GU11 3NE up to High GU11 3NF up to High GU11 3QN up to High GU11 3RD up to High GU11 3RJ up to High GU11 3RP up to High GU11 3RR up to High GU11 3RU up to High GU11 3RW up to High GU11 3RY up to High GU11 3RN up to Low

Rivers and flooding history near GU11

The rivers that matter here, each monitored live on FloodRadar:

Tongham on the River Blackwater — 1.4 km away, highest on record 1.79m
Cove Hazel Avenue on the Cove Brook — 5.8 km away, highest on record 1.65m
Tilford on the River Wey — 6.5 km away, highest on record 2.09m
Farnborough on the River Blackwater — 6.5 km away, highest on record 1.94m

146 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (23 at warning level or above), most recently 27 January 2026. Warnings cover flood areas, not individual addresses.

Recorded flood extents near the district (Environment Agency record):

February 1990 flooding — about 1.1 km from the centre
September 1968 flooding — about 0.9 km from the centre

🏠 Buying or renting in GU11? The full property flood-risk report covers any postcode here — the official likelihood band, every recorded flood nearby with distances, warning history year by year, how the local rivers behave, and an insurance outlook, print-ready for £19. See what's in the report →

Flood risk in nearby postcode districts

GU10 GU12 GU9 GU14 GU8 GU15 GU7 GU16

Band = the worst likelihood band of any property in that postcode (EA Risk of Flooding from Rivers & Sea, defence-adjusted, area-level). Check any postcode in detail — or get the full £19 property report — at the property flood-risk report. © 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.