Does SL4 flood?

Yes — parts of the SL4 district carry real flood risk: 71 of its 574 at-risk postcodes reach the Environment Agency's High likelihood band. The SL4 postcode district covers Old Windsor, Clewer East, Clewer & Dedworth East, close to Eton, Datchet, Windsor, and surrounding villages in parts of Surrey and Windsor and Maidenhead.

574 postcodes in the SL4 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 71 high, 80 medium, 347 low, 76 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 SL4 postcodes are at risk?

SL4 1JE up to High SL4 1QE up to High SL4 1QN up to High SL4 1QX up to High SL4 2AB up to High SL4 2AD up to High SL4 2AG up to High SL4 2AH up to High SL4 2AJ up to High SL4 2AN up to High SL4 2AP up to High SL4 2AW up to High SL4 2FB up to High SL4 2FF up to High SL4 2JL up to High SL4 2JQ up to High SL4 2JT up to High SL4 2JW up to High SL4 2JX up to High SL4 2JY up to High SL4 2JZ up to High SL4 2NS up to High SL4 2PG up to High SL4 2QG up to High SL4 2QL up to High SL4 2QY up to High SL4 2RB up to High SL4 2RD up to High SL4 2RE up to High SL4 2RJ up to High SL4 2RQ up to High SL4 2SE up to High SL4 2SR up to High SL4 2SS up to High SL4 3AL up to High SL4 3ER up to High SL4 3JQ up to High SL4 4SF up to High SL4 5HZ up to High SL4 5JB up to High SL4 5JH up to High SL4 5JJ up to High SL4 5TG up to High SL4 5TH up to High SL4 5UG up to High SL4 5UL up to High SL4 6AR up to High SL4 6BJ up to High SL4 6BQ up to High SL4 6BS up to High SL4 6BT up to High SL4 6BU up to High SL4 6BW up to High SL4 6DB up to High SL4 6DU up to High SL4 6DW up to High SL4 6EG up to High SL4 6ES up to High SL4 6EW up to High SL4 6FB up to High SL4 6HD up to High SL4 6HL up to High SL4 6HN up to High SL4 6HP up to High SL4 6HR up to High SL4 6HU up to High SL4 6HW up to High SL4 6HX up to High SL4 6QS up to High SL4 6QU up to High SL4 6RF up to High SL4 1AN up to Medium SL4 1QT up to Medium SL4 1QY up to Medium SL4 1RB up to Medium SL4 1RF up to Medium SL4 1RS up to Medium SL4 1SE up to Medium SL4 1SQ up to Medium SL4 1TG up to Medium SL4 2BF up to Medium SL4 2JG up to Medium SL4 2JJ up to Medium SL4 2JR up to Medium SL4 2LA up to Medium SL4 2LR up to Medium SL4 2NP up to Medium SL4 2NR up to Medium SL4 2NW up to Medium SL4 2NX up to Medium SL4 2NY up to Medium SL4 2PA up to Medium SL4 2PB up to Medium SL4 2PT up to Medium SL4 2PU up to Medium SL4 2RN up to Medium SL4 2RW up to Medium SL4 2SA up to Medium SL4 2SG up to Medium SL4 2SL up to Medium SL4 3HS up to Medium SL4 3JL up to Medium SL4 3JN up to Medium SL4 3JR up to Medium SL4 3JS up to Medium SL4 3JU up to Medium SL4 3JX up to Medium SL4 4PZ up to Medium SL4 5JA up to Medium SL4 5JQ up to Medium SL4 5TJ up to Medium SL4 5TL up to Medium SL4 5TN up to Medium SL4 5TS up to Medium SL4 5TU up to Medium SL4 5TX up to Medium SL4 6AN up to Medium SL4 6AP up to Medium SL4 6AQ up to Medium SL4 6AS up to Medium SL4 6AW up to Medium SL4 6AX up to Medium SL4 6AZ up to Medium SL4 6BB up to Medium SL4 6BN up to Medium SL4 6BP up to Medium SL4 6DL up to Medium SL4 6DQ up to Medium SL4 6EJ up to Medium SL4 6ER up to Medium SL4 6ET up to Medium SL4 6FE up to Medium SL4 6HJ up to Medium SL4 6JN up to Medium SL4 6JT up to Medium SL4 6JX up to Medium SL4 6JZ up to Medium SL4 6LA up to Medium SL4 6LE up to Medium SL4 6LF up to Medium SL4 6LG up to Medium SL4 6LL up to Medium SL4 6LQ up to Medium SL4 6PB up to Medium SL4 6PD up to Medium SL4 6PG up to Medium SL4 6QD up to Medium SL4 6QY up to Medium SL4 6QZ up to Medium SL4 6RA up to Medium SL4 6RH up to Medium SL4 1AE up to Low SL4 1BF up to Low SL4 1JF up to Low SL4 1PJ up to Low SL4 1PL up to Low SL4 1PU up to Low SL4 1PX up to Low SL4 1QF up to Low SL4 1QL up to Low SL4 1QP up to Low SL4 1QW up to Low SL4 1QZ up to Low SL4 1RD up to Low SL4 1RH up to Low SL4 1RT up to Low SL4 1RU up to Low SL4 1RX up to Low SL4 1RY up to Low SL4 1RZ up to Low SL4 1SA up to Low SL4 1SB up to Low SL4 1SH up to Low SL4 1SJ up to Low SL4 1SP up to Low SL4 1SR up to Low SL4 1SS up to Low SL4 1ST up to Low SL4 1SU up to Low SL4 1SX up to Low SL4 1SY up to Low SL4 1SZ up to Low SL4 1TA up to Low SL4 1TB up to Low SL4 1TD up to Low SL4 1TH up to Low SL4 1TQ up to Low SL4 1TX up to Low SL4 2AQ up to Low SL4 2GA up to Low SL4 2JN up to Low SL4 2JU up to Low SL4 2LB up to Low SL4 2LF up to Low SL4 2LH up to Low SL4 2LJ up to Low SL4 2LN up to Low SL4 2LP up to Low SL4 2LS up to Low SL4 2LT up to Low SL4 2LU up to Low SL4 2LX up to Low SL4 2LY up to Low SL4 2LZ up to Low SL4 2NA up to Low SL4 2NB up to Low SL4 2NE up to Low SL4 2NG up to Low SL4 2NH up to Low SL4 2NJ up to Low SL4 2NQ up to Low SL4 2NT up to Low SL4 2NU up to Low SL4 2NZ up to Low SL4 2PD up to Low SL4 2PF up to Low SL4 2PH up to Low SL4 2PL up to Low SL4 2PP up to Low SL4 2PQ up to Low SL4 2PR up to Low SL4 2PS up to Low SL4 2PW up to Low SL4 2PX up to Low SL4 2PZ up to Low SL4 2QA up to Low SL4 2QB up to Low SL4 2QD up to Low SL4 2QE up to Low SL4 2QJ up to Low SL4 2QN up to Low SL4 2QQ up to Low SL4 2QS up to Low SL4 2QW up to Low SL4 2QX up to Low SL4 2RL up to Low SL4 2RP up to Low SL4 2RR up to Low SL4 2RS up to Low SL4 2SB up to Low SL4 2SD up to Low SL4 2SH up to Low SL4 2SJ up to Low SL4 2SP up to Low SL4 2SQ up to Low SL4 2SZ up to Low SL4 3BA up to Low SL4 3HH up to Low SL4 3HJ up to Low SL4 3HL up to Low SL4 3HN up to Low SL4 3HP up to Low SL4 3HQ up to Low SL4 3HR up to Low SL4 3HU up to Low SL4 3HW up to Low SL4 3QD up to Low SL4 3QL up to Low SL4 3QN up to Low SL4 3SA up to Low SL4 3SE up to Low SL4 3SF up to Low SL4 3SH up to Low SL4 3SL up to Low SL4 3TP up to Low SL4 4QQ up to Low SL4 4SE up to Low SL4 4SH up to Low SL4 5AA up to Low SL4 5AB up to Low SL4 5AH up to Low SL4 5AN up to Low SL4 5AP up to Low SL4 5AQ up to Low SL4 5AR up to Low SL4 5AS up to Low SL4 5AT up to Low SL4 5AU up to Low SL4 5AW up to Low SL4 5AX up to Low SL4 5AY up to Low SL4 5BG up to Low SL4 5BL up to Low SL4 5BP up to Low SL4 5BQ up to Low SL4 5BT up to Low SL4 5BU up to Low SL4 5BW up to Low SL4 5BX up to Low SL4 5BY up to Low SL4 5BZ up to Low SL4 5DA up to Low SL4 5DB up to Low SL4 5DD up to Low SL4 5DF up to Low SL4 5DG up to Low SL4 5DH up to Low SL4 5DJ up to Low SL4 5DL up to Low SL4 5DP up to Low SL4 5DQ up to Low SL4 5DR up to Low SL4 5DT up to Low SL4 5DU up to Low SL4 5DX up to Low SL4 5DY up to Low SL4 5EA up to Low SL4 5EB up to Low SL4 5ED up to Low SL4 5EG up to Low SL4 5EH up to Low SL4 5EJ up to Low SL4 5EL up to Low SL4 5EN up to Low SL4 5EP up to Low SL4 5EQ up to Low SL4 5ER up to Low SL4 5ES up to Low SL4 5ET up to Low SL4 5EU up to Low SL4 5EW up to Low SL4 5EX up to Low SL4 5EY up to Low SL4 5EZ up to Low SL4 5FF up to Low SL4 5FG up to Low SL4 5FW up to Low SL4 5FY up to Low SL4 5GD up to Low SL4 5GE up to Low SL4 5GG up to Low SL4 5GL up to Low SL4 5GN up to Low SL4 5GP up to Low SL4 5GQ up to Low SL4 5GR up to Low SL4 5GS up to Low SL4 5GW up to Low SL4 5HA up to Low SL4 5HB up to Low SL4 5HD up to Low SL4 5HE up to Low SL4 5HF up to Low SL4 5HG up to Low SL4 5HL up to Low SL4 5HN up to Low SL4 5HP up to Low SL4 5HQ up to Low SL4 5HS up to Low SL4 5HU up to Low SL4 5HW up to Low SL4 5JD up to Low SL4 5JE up to Low SL4 5JF up to Low SL4 5JG up to Low SL4 5JL up to Low SL4 5JN up to Low SL4 5JR up to Low SL4 5JS up to Low SL4 5JT up to Low SL4 5JY up to Low SL4 5JZ up to Low SL4 5LA up to Low SL4 5LB up to Low SL4 5LD up to Low SL4 5LE up to Low SL4 5LG up to Low SL4 5LH up to Low SL4 5LJ up to Low SL4 5LZ up to Low SL4 5NA up to Low SL4 5NB up to Low SL4 5ND up to Low SL4 5NE up to Low SL4 5NF up to Low SL4 5NG up to Low SL4 5NH up to Low SL4 5NL up to Low SL4 5NW up to Low SL4 5PF up to Low SL4 5PG up to Low SL4 5PJ up to Low SL4 5PL up to Low SL4 5PN up to Low SL4 5TP up to Low SL4 5TQ up to Low SL4 5TT up to Low SL4 5TW up to Low SL4 5TY up to Low SL4 5TZ up to Low SL4 5UJ up to Low SL4 5UN up to Low SL4 5UT up to Low SL4 5UU up to Low SL4 6AA up to Low SL4 6AB up to Low SL4 6AE up to Low SL4 6AF up to Low SL4 6AG up to Low SL4 6AH up to Low SL4 6AJ up to Low SL4 6AL up to Low SL4 6AU up to Low SL4 6BA up to Low SL4 6BD up to Low SL4 6BG up to Low SL4 6BH up to Low SL4 6BL up to Low SL4 6BY up to Low SL4 6DD up to Low SL4 6DE up to Low SL4 6DH up to Low SL4 6DN up to Low SL4 6DP up to Low SL4 6DT up to Low SL4 6DX up to Low SL4 6DY up to Low SL4 6EB up to Low SL4 6ED up to Low SL4 6EE up to Low SL4 6EF up to Low SL4 6EH up to Low SL4 6EN up to Low SL4 6EP up to Low SL4 6EQ up to Low SL4 6EU up to Low SL4 6EX up to Low SL4 6EY up to Low SL4 6EZ up to Low SL4 6FD up to Low SL4 6FF up to Low SL4 6FG up to Low SL4 6FJ up to Low SL4 6HA up to Low SL4 6HB up to Low SL4 6HE up to Low SL4 6HF up to Low SL4 6HH up to Low SL4 6JA up to Low SL4 6JB up to Low SL4 6JE up to Low SL4 6JF up to Low SL4 6JG up to Low SL4 6JH up to Low SL4 6JJ up to Low SL4 6JL up to Low SL4 6JP up to Low SL4 6JR up to Low SL4 6JS up to Low SL4 6JU up to Low SL4 6JW up to Low SL4 6JY up to Low SL4 6LB up to Low SL4 6LD up to Low SL4 6LH up to Low SL4 6LJ up to Low SL4 6LN up to Low SL4 6LP up to Low SL4 6LT up to Low SL4 6LU up to Low SL4 6LX up to Low SL4 6LY up to Low SL4 6LZ up to Low SL4 6NA up to Low SL4 6NB up to Low SL4 6ND up to Low SL4 6NE up to Low SL4 6NF up to Low SL4 6NG up to Low SL4 6NH up to Low SL4 6NJ up to Low SL4 6NL up to Low SL4 6NN up to Low SL4 6NP up to Low SL4 6NQ up to Low SL4 6NW up to Low SL4 6PE up to Low SL4 6PF up to Low SL4 6PL up to Low SL4 6PP up to Low SL4 6PQ up to Low SL4 6PR up to Low SL4 6PS up to Low SL4 6PX up to Low SL4 6PY up to Low SL4 6QA up to Low SL4 6QB up to Low SL4 6QE up to Low SL4 6QF up to Low SL4 6QG up to Low SL4 6QH up to Low SL4 6QJ up to Low SL4 6QN up to Low SL4 6QQ up to Low SL4 6QR up to Low SL4 6QW up to Low SL4 6SA up to Low SL4 6SS up to Low SL4 1DP up to Very low SL4 1PS up to Very low SL4 1QB up to Very low SL4 1TF up to Very low SL4 2AF up to Very low SL4 2FD up to Very low SL4 2JH up to Very low SL4 2JS up to Very low SL4 2LG up to Very low SL4 2LQ up to Very low SL4 2ND up to Very low SL4 2NF up to Very low SL4 2PJ up to Very low SL4 2PN up to Very low SL4 2PY up to Very low SL4 2QF up to Very low SL4 2QH up to Very low SL4 2QU up to Very low SL4 2RF up to Very low SL4 2RG up to Very low SL4 2RH up to Very low SL4 2RT up to Very low SL4 2RU up to Very low SL4 2RX up to Very low SL4 2RY up to Very low SL4 2RZ up to Very low SL4 2SN up to Very low SL4 2ST up to Very low SL4 2SY up to Very low SL4 3DR up to Very low SL4 3EG up to Very low SL4 3EQ up to Very low SL4 3HA up to Very low SL4 3HD up to Very low SL4 3HY up to Very low SL4 3JA up to Very low SL4 3JB up to Very low SL4 3JD up to Very low SL4 3JJ up to Very low SL4 3JP up to Very low SL4 3JW up to Very low SL4 3LL up to Very low SL4 3QB up to Very low SL4 3QF up to Very low SL4 3SG up to Very low SL4 3SJ up to Very low SL4 3SS up to Very low SL4 5AZ up to Very low SL4 5BS up to Very low SL4 5HJ up to Very low SL4 5HT up to Very low SL4 5LY up to Very low SL4 5PP up to Very low SL4 5PS up to Very low SL4 5PT up to Very low SL4 5PU up to Very low SL4 5PW up to Very low SL4 5PX up to Very low SL4 5QY up to Very low SL4 5QZ up to Very low SL4 5SE up to Very low SL4 5TR up to Very low SL4 6DG up to Very low SL4 6DJ up to Very low SL4 6DR up to Very low SL4 6DS up to Very low SL4 6DZ up to Very low SL4 6EA up to Very low SL4 6EL up to Very low SL4 6FH up to Very low SL4 6PA up to Very low SL4 6PZ up to Very low SL4 6QL up to Very low SL4 6QP up to Very low SL4 6QT up to Very low SL4 6QX up to Very low

Rivers and flooding history near SL4

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

186 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (72 at warning level or above), most recently 27 February 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 SL4? 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

SL3 SL5 SL2 SL6 SL1 SL7 SL0 SL8

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.