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Does PO18 flood?

Yes — parts of the PO18 district carry real flood risk: 52 of its 106 at-risk postcodes reach the Environment Agency's High likelihood band. The PO18 postcode district covers Harbour Villages, Goodwood, Lavant, Westbourne, close to Bosham, Graylingwell, Chichester, and surrounding villages in parts of West Sussex and Hampshire.

106 postcodes in the PO18 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 52 high, 12 medium, 32 low, 10 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).

Free preview first · full report £19

Which PO18 postcodes are at risk?

PO18 0AH up to High PO18 0AT up to High PO18 0EX up to High PO18 0HA up to High PO18 0HB up to High PO18 0HN up to High PO18 0JD up to High PO18 0JT up to High PO18 0QY up to High PO18 8DS up to High PO18 8DX up to High PO18 8HG up to High PO18 8HH up to High PO18 8HL up to High PO18 8HP up to High PO18 8HR up to High PO18 8HS up to High PO18 8HX up to High PO18 8HY up to High PO18 8HZ up to High PO18 8JB up to High PO18 8JD up to High PO18 8JF up to High PO18 8JG up to High PO18 8JJ up to High PO18 8JN up to High PO18 8LL up to High PO18 8LP up to High PO18 8LR up to High PO18 8LS up to High PO18 8LU up to High PO18 8LY up to High PO18 8LZ up to High PO18 8QB up to High PO18 8QJ up to High PO18 8QL up to High PO18 8QQ up to High PO18 8QW up to High PO18 8RB up to High PO18 8RL up to High PO18 8RQ up to High PO18 8RZ up to High PO18 8SA up to High PO18 8SB up to High PO18 8TE up to High PO18 9DX up to High PO18 9EA up to High PO18 9EE up to High PO18 9HP up to High PO18 9HW up to High PO18 9JL up to High PO18 9JQ up to High PO18 0DD up to Medium PO18 0DJ up to Medium PO18 0HR up to Medium PO18 0HU up to Medium PO18 0HX up to Medium PO18 0SB up to Medium PO18 8JA up to Medium PO18 8LJ up to Medium PO18 8RY up to Medium PO18 8TF up to Medium PO18 8TG up to Medium PO18 9ED up to Medium PO18 0AL up to Low PO18 0AZ up to Low PO18 0DH up to Low PO18 0DL up to Low PO18 0DR up to Low PO18 0DW up to Low PO18 0EZ up to Low PO18 0FB up to Low PO18 0HP up to Low PO18 0HW up to Low PO18 0JA up to Low PO18 0JB up to Low PO18 0JF up to Low PO18 0JR up to Low PO18 0NL up to Low PO18 0NR up to Low PO18 0PR up to Low PO18 0RX up to Low PO18 8DY up to Low PO18 8ET up to Low PO18 8HA up to Low PO18 8HQ up to Low PO18 8JE up to Low PO18 8JP up to Low PO18 8LH up to Low PO18 8LT up to Low PO18 8QP up to Low PO18 8TQ up to Low PO18 8UJ up to Low PO18 8XA up to Low PO18 9EG up to Low PO18 9JW up to Low PO18 8AP up to Very low PO18 8ES up to Very low PO18 8EZ up to Very low PO18 8HT up to Very low PO18 8HU up to Very low PO18 8NA up to Very low PO18 8PL up to Very low PO18 8PS up to Very low PO18 8SF up to Very low PO18 8TB up to Very low

Rivers and flooding history near PO18

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

483 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (67 at warning level or above), most recently 31 March 2026. Warnings cover flood areas, not individual addresses.

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

🏠 Buying or renting in PO18? 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

PO17 PO19 PO16 PO20 PO15 PO21 PO14 PO22

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.