Does PO4 flood?

Yes — parts of the PO4 district carry real flood risk: 76 of its 136 at-risk postcodes reach the Environment Agency's High likelihood band. The PO4 postcode district covers Eastney and Craneswater, Milton, close to Gosport, Ryde, Havant, and surrounding villages in parts of Hampshire and Isle of Wight.

136 postcodes in the PO4 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 76 high, 10 medium, 45 low, 5 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 PO4 postcodes are at risk?

PO4 0AQ up to High PO4 0BW up to High PO4 0BX up to High PO4 0BY up to High PO4 0DE up to High PO4 0NQ up to High PO4 0QJ up to High PO4 0RA up to High PO4 0RB up to High PO4 0RD up to High PO4 0RF up to High PO4 0RH up to High PO4 0RJ up to High PO4 0RL up to High PO4 0RN up to High PO4 0RP up to High PO4 0RQ up to High PO4 0RR up to High PO4 0RS up to High PO4 0RT up to High PO4 0RU up to High PO4 0RW up to High PO4 0RY up to High PO4 0SA up to High PO4 0SB up to High PO4 0SD up to High PO4 0SE up to High PO4 0SF up to High PO4 0SG up to High PO4 0SH up to High PO4 0SJ up to High PO4 0SL up to High PO4 0SN up to High PO4 0SP up to High PO4 0SQ up to High PO4 0ST up to High PO4 0SU up to High PO4 0SW up to High PO4 0SX up to High PO4 0SY up to High PO4 0TA up to High PO4 0TB up to High PO4 0TR up to High PO4 0UD up to High PO4 0UU up to High PO4 8LS up to High PO4 8LT up to High PO4 9AG up to High PO4 9GB up to High PO4 9JF up to High PO4 9JQ up to High PO4 9JU up to High PO4 9LD up to High PO4 9LG up to High PO4 9LN up to High PO4 9LP up to High PO4 9LQ up to High PO4 9LS up to High PO4 9LW up to High PO4 9LX up to High PO4 9LY up to High PO4 9NB up to High PO4 9QF up to High PO4 9QJ up to High PO4 9QL up to High PO4 9RA up to High PO4 9RE up to High PO4 9RF up to High PO4 9RG up to High PO4 9RJ up to High PO4 9RR up to High PO4 9SJ up to High PO4 9TA up to High PO4 9TB up to High PO4 9TE up to High PO4 9UD up to High PO4 0DD up to Medium PO4 0QS up to Medium PO4 0RX up to Medium PO4 0RZ up to Medium PO4 8LL up to Medium PO4 9LT up to Medium PO4 9QS up to Medium PO4 9RD up to Medium PO4 9RH up to Medium PO4 9TF up to Medium PO4 0JS up to Low PO4 0JY up to Low PO4 0NH up to Low PO4 0NJ up to Low PO4 0NN up to Low PO4 0NU up to Low PO4 0NZ up to Low PO4 0PJ up to Low PO4 0PL up to Low PO4 0PN up to Low PO4 0PT up to Low PO4 0PZ up to Low PO4 0QB up to Low PO4 0QL up to Low PO4 0QP up to Low PO4 0QR up to Low PO4 0QT up to Low PO4 0QW up to Low PO4 0QY up to Low PO4 0QZ up to Low PO4 0RE up to Low PO4 0TD up to Low PO4 8DZ up to Low PO4 8HR up to Low PO4 8HY up to Low PO4 9FZ up to Low PO4 9JB up to Low PO4 9JJ up to Low PO4 9JL up to Low PO4 9JY up to Low PO4 9LR up to Low PO4 9NR up to Low PO4 9NT up to Low PO4 9NU up to Low PO4 9PH up to Low PO4 9PL up to Low PO4 9PP up to Low PO4 9QB up to Low PO4 9QE up to Low PO4 9QN up to Low PO4 9QP up to Low PO4 9QR up to Low PO4 9RP up to Low PO4 9SU up to Low PO4 9TD up to Low PO4 9EH up to Very low PO4 9GE up to Very low PO4 9JZ up to Very low PO4 9NX up to Very low PO4 9RB up to Very low

Rivers and flooding history near PO4

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

408 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (49 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 PO4? 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

PO3 PO5 PO2 PO6 PO1 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.