W3: no postcode below a spring high tide, the lowest 1.4 m above it

W3 on the relief of London, with a tide staff: Its lowest postcode is 1.4 m above a spring high tide.

No postcode in W3 stands below an ordinary spring high tide at London Bridge. The lowest, W3 7EU, is 1.4 m above it and 0.0 m below the tide of 1 February 1953.

Ground at eight in ten of its postcodes: between 7.8 m and 33 m, measured from Ordnance Datum; the middle one stands at 24 m.
One of 1,158 stands lower than the 1953 tide (5.41 m).
5 lie in the Environment Agency's Flood Zone 3 from the sea, mapped without defences.
Mostly in Ealing; partly in Hounslow.

Open W3 on the map