Does PO16 flood?

Yes — parts of the PO16 district carry real flood risk: 33 of its 99 at-risk postcodes reach the Environment Agency's High likelihood band. The PO16 postcode district covers Portchester Castle, Portchester Wicor, Fareham Town, close to Wallington, Titchfield, Gosport, and surrounding villages in parts of Hampshire and Isle of Wight.

99 postcodes in the PO16 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 33 high, 16 medium, 37 low, 13 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 PO16 postcodes are at risk?

PO16 0DG up to High PO16 0DQ up to High PO16 0DX up to High PO16 0LY up to High PO16 0LZ up to High PO16 0RA up to High PO16 0RJ up to High PO16 0SD up to High PO16 0SE up to High PO16 0XH up to High PO16 8SJ up to High PO16 8SL up to High PO16 8SN up to High PO16 8SP up to High PO16 8SS up to High PO16 8ST up to High PO16 8SU up to High PO16 8SW up to High PO16 8SX up to High PO16 8TB up to High PO16 8TE up to High PO16 8TJ up to High PO16 8XL up to High PO16 9DR up to High PO16 9EL up to High PO16 9EP up to High PO16 9HN up to High PO16 9HP up to High PO16 9NG up to High PO16 9PW up to High PO16 9SD up to High PO16 9SE up to High PO16 9SF up to High PO16 0RL up to Medium PO16 7BZ up to Medium PO16 9EH up to Medium PO16 9HW up to Medium PO16 9LT up to Medium PO16 9NB up to Medium PO16 9NJ up to Medium PO16 9PN up to Medium PO16 9PP up to Medium PO16 9PR up to Medium PO16 9PS up to Medium PO16 9PU up to Medium PO16 9PX up to Medium PO16 9PY up to Medium PO16 9QG up to Medium PO16 9XT up to Medium PO16 0DE up to Low PO16 0SU up to Low PO16 0UT up to Low PO16 0XR up to Low PO16 7PB up to Low PO16 7PE up to Low PO16 8SE up to Low PO16 8SG up to Low PO16 8UP up to Low PO16 8XJ up to Low PO16 9EN up to Low PO16 9ER up to Low PO16 9EW up to Low PO16 9EZ up to Low PO16 9FB up to Low PO16 9FF up to Low PO16 9HA up to Low PO16 9HL up to Low PO16 9HQ up to Low PO16 9HT up to Low PO16 9HU up to Low PO16 9JG up to Low PO16 9LR up to Low PO16 9LS up to Low PO16 9LU up to Low PO16 9NH up to Low PO16 9NN up to Low PO16 9NP up to Low PO16 9NQ up to Low PO16 9NW up to Low PO16 9PZ up to Low PO16 9QD up to Low PO16 9QH up to Low PO16 9QN up to Low PO16 9QS up to Low PO16 9QX up to Low PO16 9UZ up to Low PO16 8BD up to Very low PO16 8BE up to Very low PO16 8BH up to Very low PO16 9PD up to Very low PO16 9PT up to Very low PO16 9QA up to Very low PO16 9QJ up to Very low PO16 9QQ up to Very low PO16 9SU up to Very low PO16 9UN up to Very low PO16 9UW up to Very low PO16 9UY up to Very low PO16 9XB up to Very low

Rivers and flooding history near PO16

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

329 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (46 at warning level or above), most recently 18 March 2026. Warnings cover flood areas, not individual addresses.

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

Records, not floods: no outline on the record is not evidence a place has not flooded.

🏠 Buying or renting in PO16? 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

PO15 PO17 PO14 PO18 PO13 PO19 PO12 PO20

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.