Does DT4 flood?

Yes — parts of the DT4 district carry real flood risk: 51 of its 154 at-risk postcodes reach the Environment Agency's High likelihood band. The DT4 postcode district covers Melcombe Regis, Radipole, Rodwell & Wyke, Westham, close to Weymouth, Portland, Upwey, and surrounding villages in Dorset.

154 postcodes in the DT4 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 51 high, 28 medium, 37 low, 38 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 DT4 postcodes are at risk?

DT4 0ED up to High DT4 7AN up to High DT4 7DW up to High DT4 7EA up to High DT4 7EY up to High DT4 7RN up to High DT4 7RW up to High DT4 7SW up to High DT4 7SX up to High DT4 7TY up to High DT4 8AD up to High DT4 8AF up to High DT4 8AG up to High DT4 8AJ up to High DT4 8AL up to High DT4 8AP up to High DT4 8AQ up to High DT4 8AR up to High DT4 8AW up to High DT4 8AX up to High DT4 8AY up to High DT4 8BE up to High DT4 8BG up to High DT4 8BJ up to High DT4 8BN up to High DT4 8DT up to High DT4 8DU up to High DT4 8DX up to High DT4 8EA up to High DT4 8EB up to High DT4 8ET up to High DT4 8NG up to High DT4 8PU up to High DT4 8QE up to High DT4 8TJ up to High DT4 8TR up to High DT4 8TS up to High DT4 8TU up to High DT4 8TX up to High DT4 8UF up to High DT4 8UR up to High DT4 9JZ up to High DT4 9NR up to High DT4 9RN up to High DT4 9RT up to High DT4 9RU up to High DT4 9RX up to High DT4 9RY up to High DT4 9SE up to High DT4 9SS up to High DT4 9UW up to High DT4 7BG up to Medium DT4 7DQ up to Medium DT4 7DX up to Medium DT4 7NB up to Medium DT4 7TZ up to Medium DT4 7UQ up to Medium DT4 8AH up to Medium DT4 8AS up to Medium DT4 8AT up to Medium DT4 8AU up to Medium DT4 8DE up to Medium DT4 8DF up to Medium DT4 8DG up to Medium DT4 8DH up to Medium DT4 8DJ up to Medium DT4 8EN up to Medium DT4 8NF up to Medium DT4 8NH up to Medium DT4 8NN up to Medium DT4 8NP up to Medium DT4 8NQ up to Medium DT4 8NS up to Medium DT4 8NU up to Medium DT4 8NW up to Medium DT4 8TT up to Medium DT4 8TW up to Medium DT4 9UJ up to Medium DT4 9XH up to Medium DT4 0UA up to Low DT4 7AA up to Low DT4 7AP up to Low DT4 7AR up to Low DT4 7AW up to Low DT4 7DA up to Low DT4 7DE up to Low DT4 7DF up to Low DT4 7DG up to Low DT4 7DU up to Low DT4 8AA up to Low DT4 8BB up to Low DT4 8BP up to Low DT4 8BT up to Low DT4 8BW up to Low DT4 8BZ up to Low DT4 8DL up to Low DT4 8DN up to Low DT4 8DR up to Low DT4 8ED up to Low DT4 8EH up to Low DT4 8EQ up to Low DT4 8HQ up to Low DT4 8JE up to Low DT4 8LY up to Low DT4 8NA up to Low DT4 8NJ up to Low DT4 8PP up to Low DT4 8SU up to Low DT4 8TE up to Low DT4 8TG up to Low DT4 8XE up to Low DT4 9UL up to Low DT4 9UP up to Low DT4 9XE up to Low DT4 9XS up to Low DT4 9XX up to Low DT4 7AG up to Very low DT4 7AT up to Very low DT4 7AX up to Very low DT4 7BH up to Very low DT4 7BJ up to Very low DT4 7BP up to Very low DT4 7DD up to Very low DT4 7DH up to Very low DT4 7DL up to Very low DT4 7DN up to Very low DT4 7DP up to Very low DT4 7DS up to Very low DT4 7DT up to Very low DT4 7DZ up to Very low DT4 7EN up to Very low DT4 7HX up to Very low DT4 7HZ up to Very low DT4 7JB up to Very low DT4 7JD up to Very low DT4 7RA up to Very low DT4 7RG up to Very low DT4 7RH up to Very low DT4 7RJ up to Very low DT4 7RL up to Very low DT4 7RQ up to Very low DT4 7TL up to Very low DT4 7TP up to Very low DT4 7TS up to Very low DT4 7UA up to Very low DT4 7UB up to Very low DT4 7UD up to Very low DT4 7UE up to Very low DT4 7UF up to Very low DT4 9AF up to Very low DT4 9DN up to Very low DT4 9GB up to Very low DT4 9GE up to Very low DT4 9YU up to Very low

Rivers and flooding history near DT4

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

377 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (189 at warning level or above), most recently 15 March 2026. Warnings cover flood areas, not individual addresses.

🏠 Buying or renting in DT4? 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

DT3 DT5 DT2 DT6 DT1 DT7 DT8 DT9

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.