Does SE18 flood?

Yes — parts of the SE18 district carry real flood risk: 9 of its 124 at-risk postcodes reach the Environment Agency's High likelihood band. The SE18 postcode district covers Plumstead & Glyndon, Woolwich Arsenal, Woolwich Dockyard, close to Silvertown, Charlton, Sidcup, and surrounding villages in parts of Greater London and Kent.

124 postcodes in the SE18 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 9 high, 2 medium, 5 low, 108 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 SE18 postcodes are at risk?

SE18 2DN up to High SE18 2DP up to High SE18 2DW up to High SE18 5BA up to High SE18 5BB up to High SE18 5BF up to High SE18 5NH up to High SE18 5QH up to High SE18 6DX up to High SE18 1JU up to Medium SE18 1JX up to Medium SE18 1EG up to Low SE18 1EH up to Low SE18 1EQ up to Low SE18 5BG up to Low SE18 5NP up to Low SE18 1BG up to Very low SE18 1BN up to Very low SE18 1BS up to Very low SE18 1BT up to Very low SE18 1BU up to Very low SE18 1BW up to Very low SE18 1BX up to Very low SE18 1BY up to Very low SE18 1BZ up to Very low SE18 1DA up to Very low SE18 1DB up to Very low SE18 1DD up to Very low SE18 1DE up to Very low SE18 1DF up to Very low SE18 1DG up to Very low SE18 1DJ up to Very low SE18 1DL up to Very low SE18 1DN up to Very low SE18 1DQ up to Very low SE18 1DW up to Very low SE18 1EA up to Very low SE18 1EB up to Very low SE18 1ED up to Very low SE18 1EE up to Very low SE18 1EF up to Very low SE18 1EJ up to Very low SE18 1EL up to Very low SE18 1EN up to Very low SE18 1EP up to Very low SE18 1ER up to Very low SE18 1ES up to Very low SE18 1ET up to Very low SE18 1EW up to Very low SE18 1HJ up to Very low SE18 1HN up to Very low SE18 1HS up to Very low SE18 1HT up to Very low SE18 1HU up to Very low SE18 1HX up to Very low SE18 1HY up to Very low SE18 1HZ up to Very low SE18 1SA up to Very low SE18 1SB up to Very low SE18 1SF up to Very low SE18 1SG up to Very low SE18 1SH up to Very low SE18 1SL up to Very low SE18 1SN up to Very low SE18 1SP up to Very low SE18 1SQ up to Very low SE18 1SR up to Very low SE18 1SS up to Very low SE18 1SW up to Very low SE18 3EY up to Very low SE18 5AQ up to Very low SE18 5AS up to Very low SE18 5AT up to Very low SE18 5BX up to Very low SE18 5NJ up to Very low SE18 5NN up to Very low SE18 5NR up to Very low SE18 5NS up to Very low SE18 5NU up to Very low SE18 5NX up to Very low SE18 5PG up to Very low SE18 5PH up to Very low SE18 5QS up to Very low SE18 5QX up to Very low SE18 5QY up to Very low SE18 5QZ up to Very low SE18 5SP up to Very low SE18 5ST up to Very low SE18 5SU up to Very low SE18 5SZ up to Very low SE18 5TA up to Very low SE18 5TD up to Very low SE18 5TF up to Very low SE18 5TL up to Very low SE18 5TR up to Very low SE18 5TS up to Very low SE18 5TT up to Very low SE18 6LA up to Very low SE18 6LB up to Very low SE18 6PG up to Very low SE18 6PJ up to Very low SE18 6PL up to Very low SE18 6PP up to Very low SE18 6RE up to Very low SE18 6RS up to Very low SE18 6RU up to Very low SE18 6RY up to Very low SE18 6SE up to Very low SE18 6SF up to Very low SE18 6SG up to Very low SE18 6SN up to Very low SE18 6ST up to Very low SE18 6SY up to Very low SE18 6TA up to Very low SE18 6TB up to Very low SE18 6TD up to Very low SE18 6TE up to Very low SE18 6TG up to Very low SE18 6TH up to Very low SE18 6TL up to Very low SE18 6WD up to Very low SE18 6XB up to Very low SE18 6XD up to Very low SE18 7EA up to Very low

Rivers and flooding history near SE18

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

269 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (11 at warning level or above), most recently 28 August 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 SE18? 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

SE17 SE16 SE20 SE15 SE14 SE13 SE12 SE11

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.