SW12: 10 m clear of the highest tide in the London Bridge ledgers

The lowest postcode in SW12, SW12 8UA, stands 10 m above the highest tide in the London Bridge ledgers (5.41 m, 1 February 1953). The highest, SW12 9HL, stands 31 m above it.
- Ground at eight in ten of its postcodes: between 22 m and 31 m, measured from Ordnance Datum; the middle one stands at 26 m.
- None lies in the Environment Agency's Flood Zone 3 from the sea.
- Mostly in Wandsworth; partly in Lambeth.