This article is about the tidal Thames. For the tunnel to divert sewage from the Thames, see Thames Tideway Scheme.

Teddington Weir marks the start of the Tideway

The Tideway is that part of the River Thames in England which is subject to tides. This stretch of water is downstream from Teddington Lock. The Tideway comprises the upper Thames Estuary including the Pool of London.


Tidal activity

Depending on the time of year, the river tide rises and falls twice a day by up to 7:m (24:ft). Because the tide goes against the outflow of fresh water from the Thames Basin, it takes longer to subside (6–9 hours) than it does to flow in (4–5 hours).

London Bridge is used as the basis for published tide tables giving the times of high tide. High tide reaches Putney about 30 minutes later.

Low-lying banks of London are naturally vulnerable to flooding by storm surges. The threat has increased due to a slow but continuous rise in high water level, caused by the extremely slow 'tilting' of Britain (up in the north and down in the south) due to post-glacial rebound and the gradual rise in sea levels due to climate change. The city and state have erected defensive barriers, including the Thames Barrier, which was constructed across the Thames at Woolwich to deal with this threat.


A Fast Response Targa 31 boat of the Marine Support Unit of the Metropolitan Police

The Tideway, often referred to as the Port of London, is managed by the Port of London Authority (PLA). The upstream limi... ...read more

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