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Does PO12 flood?

Yes — parts of the PO12 district carry real flood risk: 51 of its 124 at-risk postcodes reach the Environment Agency's High likelihood band. The PO12 postcode district covers Harbourside & Town, Forton, Anglesey, Alverstoke, close to Gosport, Ryde, Wallington, and surrounding villages in parts of Hampshire and Isle of Wight.

124 postcodes in the PO12 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 51 high, 22 medium, 47 low, 4 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 PO12 postcodes are at risk?

PO12 1AF up to High PO12 1AH up to High PO12 1AJ up to High PO12 1AL up to High PO12 1AX up to High PO12 1BG up to High PO12 1BJ up to High PO12 1DP up to High PO12 1EP up to High PO12 1EQ up to High PO12 1FJ up to High PO12 1FN up to High PO12 1FX up to High PO12 1GJ up to High PO12 1GL up to High PO12 1HJ up to High PO12 1RG up to High PO12 1SU up to High PO12 2AB up to High PO12 2AS up to High PO12 2AT up to High PO12 2AX up to High PO12 2BL up to High PO12 2BY up to High PO12 2FA up to High PO12 2FD up to High PO12 2FE up to High PO12 2HT up to High PO12 2LA up to High PO12 2LD up to High PO12 2LE up to High PO12 2LF up to High PO12 2LL up to High PO12 2LN up to High PO12 2LP up to High PO12 2LR up to High PO12 2LX up to High PO12 2PZ up to High PO12 2QU up to High PO12 2TR up to High PO12 4DQ up to High PO12 4FS up to High PO12 4LE up to High PO12 4LJ up to High PO12 4LX up to High PO12 4QE up to High PO12 4QF up to High PO12 4QN up to High PO12 4UE up to High PO12 4UG up to High PO12 4WF up to High PO12 1FA up to Medium PO12 1GF up to Medium PO12 1GX up to Medium PO12 1QH up to Medium PO12 1QJ up to Medium PO12 1RB up to Medium PO12 1RD up to Medium PO12 1RE up to Medium PO12 1SR up to Medium PO12 2AQ up to Medium PO12 2AR up to Medium PO12 2BD up to Medium PO12 2DA up to Medium PO12 2HQ up to Medium PO12 2LB up to Medium PO12 2LJ up to Medium PO12 2LS up to Medium PO12 4QB up to Medium PO12 4QD up to Medium PO12 4QL up to Medium PO12 4RH up to Medium PO12 4RJ up to Medium PO12 1AA up to Low PO12 1AD up to Low PO12 1AE up to Low PO12 1AN up to Low PO12 1BS up to Low PO12 1DS up to Low PO12 1FY up to Low PO12 1HP up to Low PO12 1HT up to Low PO12 1ND up to Low PO12 1NF up to Low PO12 1QL up to Low PO12 1QU up to Low PO12 1QX up to Low PO12 1QZ up to Low PO12 1RA up to Low PO12 2AH up to Low PO12 2AJ up to Low PO12 2AZ up to Low PO12 2FF up to Low PO12 2HE up to Low PO12 2HH up to Low PO12 2JG up to Low PO12 2LY up to Low PO12 2PX up to Low PO12 2QX up to Low PO12 2UE up to Low PO12 2UQ up to Low PO12 3EJ up to Low PO12 3HA up to Low PO12 3HB up to Low PO12 3HD up to Low PO12 3HE up to Low PO12 3HF up to Low PO12 3HG up to Low PO12 3HJ up to Low PO12 3HN up to Low PO12 3HP up to Low PO12 3HW up to Low PO12 3JE up to Low PO12 3JN up to Low PO12 3JW up to Low PO12 4FL up to Low PO12 4QG up to Low PO12 4SJ up to Low PO12 4UA up to Low PO12 4XJ up to Low PO12 1EN up to Very low PO12 2DN up to Very low PO12 2LU up to Very low PO12 2QT up to Very low

Rivers and flooding history near PO12

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

346 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (38 at warning level or above), most recently 19 February 2026. Warnings cover flood areas, not individual addresses.

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

🏠 Buying or renting in PO12? 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

PO11 PO13 PO10 PO14 PO15 PO9 PO16 PO8

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.