NW6: 18 m clear of the highest tide in the London Bridge ledgers

The lowest postcode in NW6, NW6 5FE, stands 18 m above the highest tide in the London Bridge ledgers (5.41 m, 1 February 1953). The highest, NW6 1DP, stands 77 m above it.
- Ground at eight in ten of its postcodes: between 30 m and 62 m, measured from Ordnance Datum; the middle one stands at 42 m.
- None lies in the Environment Agency's Flood Zone 3 from the sea.
- Mostly in Camden; partly in Brent.