Does GU31 flood?

Yes — parts of the GU31 district carry real flood risk: 7 of its 19 at-risk postcodes reach the Environment Agency's High likelihood band. The GU31 postcode district covers Harting, close to Petersfield, Princes Marsh, East Meon, and surrounding villages in parts of Hampshire and West Sussex.

19 postcodes in the GU31 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 7 high, 2 medium, 8 low, 2 very 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 GU31 postcodes are at risk?

GU31 4AH up to High GU31 4AZ up to High GU31 4FG up to High GU31 4FH up to High GU31 4LR up to High GU31 5LF up to High GU31 5RS up to High GU31 4DA up to Medium GU31 5BD up to Medium GU31 4AE up to Low GU31 4JS up to Low GU31 4JX up to Low GU31 4LQ up to Low GU31 5AZ up to Low GU31 5JN up to Low GU31 5JT up to Low GU31 5SE up to Low GU31 4JJ up to Very low GU31 4JR up to Very low

Rivers and flooding history near GU31

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

Borough Grove on the Petersfield Stream — 2 km away, highest on record 60.30m
Winchester Road on the Petersfield Stream — 2.4 km away, highest on record 66.22m
Princes Marsh on the River Rother — 4.7 km away, highest on record 1.96m
East Meon on the River Meon — 8.2 km away, highest on record 0.72m

21 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (13 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):

East Hampshire Winter 13/14 (2014) — about 12.5 km from the centre

🏠 Buying or renting in GU31? 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

GU30 GU32 GU29 GU33 GU28 GU34 GU27 GU35

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.