Does PO3 flood?

Yes — parts of the PO3 district carry real flood risk: 39 of its 236 at-risk postcodes reach the Environment Agency's High likelihood band. The PO3 postcode district covers Copnor, Hilsea, Baffins, close to Gosport, Havant, Denmead, and surrounding villages in parts of Hampshire and Isle of Wight.

236 postcodes in the PO3 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 39 high, 22 medium, 62 low, 113 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 PO3 postcodes are at risk?

PO3 5FH up to High PO3 5HH up to High PO3 5HU up to High PO3 5JJ up to High PO3 5LY up to High PO3 5LZ up to High PO3 5ND up to High PO3 5NL up to High PO3 5NP up to High PO3 5NR up to High PO3 5NS up to High PO3 5NX up to High PO3 5NY up to High PO3 5PA up to High PO3 5QA up to High PO3 5QG up to High PO3 5QH up to High PO3 5QL up to High PO3 5QP up to High PO3 5QQ up to High PO3 5QS up to High PO3 5QT up to High PO3 5QU up to High PO3 5RB up to High PO3 5RD up to High PO3 5RN up to High PO3 5RY up to High PO3 5RZ up to High PO3 5SD up to High PO3 5SF up to High PO3 5TF up to High PO3 5TG up to High PO3 5TQ up to High PO3 5UL up to High PO3 5UP up to High PO3 5UY up to High PO3 5XT up to High PO3 6QA up to High PO3 6QB up to High PO3 5GP up to Medium PO3 5NU up to Medium PO3 5RA up to Medium PO3 5TB up to Medium PO3 5TE up to Medium PO3 5TJ up to Medium PO3 5TL up to Medium PO3 5TP up to Medium PO3 5TR up to Medium PO3 5TS up to Medium PO3 5UA up to Medium PO3 5UD up to Medium PO3 5UE up to Medium PO3 5UF up to Medium PO3 5UG up to Medium PO3 5UQ up to Medium PO3 5US up to Medium PO3 5UZ up to Medium PO3 5XA up to Medium PO3 5XB up to Medium PO3 5XD up to Medium PO3 6PZ up to Medium PO3 5DX up to Low PO3 5DY up to Low PO3 5DZ up to Low PO3 5EH up to Low PO3 5EJ up to Low PO3 5ER up to Low PO3 5EW up to Low PO3 5FB up to Low PO3 5FF up to Low PO3 5FS up to Low PO3 5FY up to Low PO3 5FZ up to Low PO3 5GD up to Low PO3 5HJ up to Low PO3 5HL up to Low PO3 5HS up to Low PO3 5HT up to Low PO3 5HX up to Low PO3 5HY up to Low PO3 5HZ up to Low PO3 5JA up to Low PO3 5JB up to Low PO3 5JD up to Low PO3 5JE up to Low PO3 5JF up to Low PO3 5JP up to Low PO3 5JT up to Low PO3 5JY up to Low PO3 5JZ up to Low PO3 5LA up to Low PO3 5LD up to Low PO3 5LE up to Low PO3 5LF up to Low PO3 5LG up to Low PO3 5LN up to Low PO3 5LR up to Low PO3 5LS up to Low PO3 5LT up to Low PO3 5LU up to Low PO3 5LW up to Low PO3 5LX up to Low PO3 5PJ up to Low PO3 5PQ up to Low PO3 5PU up to Low PO3 5QY up to Low PO3 5QZ up to Low PO3 5TA up to Low PO3 5TN up to Low PO3 5TT up to Low PO3 5TW up to Low PO3 5TX up to Low PO3 5TZ up to Low PO3 5UB up to Low PO3 5UH up to Low PO3 5UJ up to Low PO3 5UN up to Low PO3 5UR up to Low PO3 5UU up to Low PO3 5UX up to Low PO3 5XE up to Low PO3 5XU up to Low PO3 6EG up to Low PO3 5BJ up to Very low PO3 5BL up to Very low PO3 5BN up to Very low PO3 5BP up to Very low PO3 5BU up to Very low PO3 5EP up to Very low PO3 5ES up to Very low PO3 5FE up to Very low PO3 5FP up to Very low PO3 5FT up to Very low PO3 5FU up to Very low PO3 5FX up to Very low PO3 5GE up to Very low PO3 5GQ up to Very low PO3 5JH up to Very low PO3 5JN up to Very low PO3 5JS up to Very low PO3 5JW up to Very low PO3 5LB up to Very low PO3 5LP up to Very low PO3 5NA up to Very low PO3 5NB up to Very low PO3 5NH up to Very low PO3 5NJ up to Very low PO3 5NN up to Very low PO3 5PB up to Very low PO3 5PD up to Very low PO3 5PE up to Very low PO3 5PF up to Very low PO3 5PL up to Very low PO3 5PR up to Very low PO3 5PS up to Very low PO3 5PW up to Very low PO3 5QD up to Very low PO3 5QN up to Very low PO3 5QR up to Very low PO3 5QW up to Very low PO3 5RE up to Very low PO3 5RF up to Very low PO3 5RJ up to Very low PO3 5RQ up to Very low PO3 5RR up to Very low PO3 5RS up to Very low PO3 5RU up to Very low PO3 5RX up to Very low PO3 5SA up to Very low PO3 5SH up to Very low PO3 5SL up to Very low PO3 5SP up to Very low PO3 5TU up to Very low PO3 5TY up to Very low PO3 5UT up to Very low PO3 5UW up to Very low PO3 5XF up to Very low PO3 5XG up to Very low PO3 5XH up to Very low PO3 5XQ up to Very low PO3 5XR up to Very low PO3 5XS up to Very low PO3 5XX up to Very low PO3 5YB up to Very low PO3 6BT up to Very low PO3 6DJ up to Very low PO3 6DX up to Very low PO3 6DY up to Very low PO3 6DZ up to Very low PO3 6EH up to Very low PO3 6EJ up to Very low PO3 6EQ up to Very low PO3 6FA up to Very low PO3 6FH up to Very low PO3 6HS up to Very low PO3 6HT up to Very low PO3 6HU up to Very low PO3 6HX up to Very low PO3 6HY up to Very low PO3 6HZ up to Very low PO3 6JA up to Very low PO3 6JD up to Very low PO3 6JH up to Very low PO3 6JL up to Very low PO3 6JN up to Very low PO3 6JQ up to Very low PO3 6LG up to Very low PO3 6LH up to Very low PO3 6LL up to Very low PO3 6LP up to Very low PO3 6LY up to Very low PO3 6LZ up to Very low PO3 6NA up to Very low PO3 6NB up to Very low PO3 6ND up to Very low PO3 6NF up to Very low PO3 6NJ up to Very low PO3 6NL up to Very low PO3 6NN up to Very low PO3 6NP up to Very low PO3 6NR up to Very low PO3 6NS up to Very low PO3 6NT up to Very low PO3 6NU up to Very low PO3 6PB up to Very low PO3 6PD up to Very low PO3 6PG up to Very low PO3 6PH up to Very low PO3 6PJ up to Very low PO3 6PL up to Very low PO3 6PN up to Very low PO3 6PP up to Very low PO3 6PQ up to Very low PO3 6PR up to Very low PO3 6PS up to Very low PO3 6PW up to Very low

Rivers and flooding history near PO3

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

550 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (74 at warning level or above), most recently 18 March 2026. Warnings cover flood areas, not individual addresses.

🏠 Buying or renting in PO3? 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

PO2 PO4 PO1 PO5 PO6 PO7 PO8 PO9

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.