Our website uses cookies so that we can provide a better service. Continue to use the site as normal if you're happy with this, or find out how to manage cookies.


The PLA Hydrographic Service provides a wide range of services to river users

Continuous monitoring of the river and estuary are essential to the safe navigation of the Thames. Regular surveys are completed of the tidal Thames from Teddington to the Outer Estuary. Many types of survey are carried out - main, periodic, engineering and berth surveys are all now produced digitally to improve efficiency and accuracy.
We produce a wide range of charts and other survey products
Contents include: Tide tables | Sunset times | Port Comms | Bridge Clearances | Distance Tables
We maintain 16 Tide Gauges and provide live and predicted tidal information
Published surveys issued by the PLA Hydrographic Service
Select your gauge
Bridge heights, survey data, chemical and physical analysis
A short film about the tidal flow at Tilburyness