River Thames Society

Welcome to The River Thames Society

Members of The River Thames Society are dedicated to protecting and preserving the natural beauty of the River Thames.


The Thames is one of the World's most fascinating and beautiful rivers. From source to sea, its 215 miles flow from springs in Gloucestershire through rural and developed areas to London and on to the imposing tidal estuary into the North Sea.


If you are inspired by the Society's aims and achievements and would like to help us to protect and promote the Thames, please become a River Thames Society member and join us as we continue our quest to preserve and develop the River Thames.

Important Navigational Information (last updated on Saturday January 23rd 2021)

Tidal Thames (Port of London Authority)
- No vessel may pass under Hammersmith Bridge until further notice.
- A Notice to Mariners published on January 5th 2021 covers restrictions resulting from the current lockdown.

- On Saturday January 23rd, PLA implemented an Ebb Tide warning - Yellow Flag

Non-Tidal Thames (Environment Agency)
- On Wednesday January 5th, the Environment Agency published updated guidance about use of waterways in  the current period on national lockdown.
- Currently, red  warnings cover all of the non-tidal River Thames. For the latest information on river and lock status, please check the information page from the Environment Agency.
- Current and future restrictions and closures  (list updated on January 22nd). The closure period for several locks has been extended as work is taking longer than planned.

- On January 12th, the Environment Agency advised that assisted passage at locks will not be provided during this lockdown period. Public power will remain operational. Also there will be no time limit on EA moorings. More information is here.
- Temple Lock will be closed to all traffic on Thursday January 28th from 8am to 4pm for remedial drainage work. 

- River levels may be viewed on this Government website.
- Flood alerts are in force for many sections of the River Thames.


Almost every day, there is news about the River Thames. Here are some recent headlines.
There are more items on our News page.

January 7th 2021

Authorities have issued updates on use of waterways in lockdown(scroll up).

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January 27th 2021

New edition of Tidal Thames News published by Port of London Authority.

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January 14th 2021

RTS Member raffle - winner announced.

Explore The River Thames

River Thames Society Members have contributed descriptions and pictures of the River Thames from source to sea.

Click on a picture below to read more about a section of the River Thames.

Osney Bridge
Upper Thames
Middle Thames
Teddington Lock Weir
Old Windsor to Teddington
Upper Tideway
Central Tideway and Estuary
Show More


Length in miles




Fish species



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