Dimensions of the River Thames in London

The River Thames flows 135 km (84 mi) from its source in the Cotswolds to the North Sea, passing through the heart of London. Key dimensions in the London stretch:

• Width: 200‑300 m (650‑1,000 ft) in central London; widens to ~1,800 m (6,000 ft) near Southend‑on‑Sea.
• Depth: Typically 10‑15 m (33‑49 ft); deepest point ~27 m (88 ft) near Tower Bridge.
• Tidal Influence: Tidal up to Teddington Lock (19 km/12 mi upstream); average tidal range ~7 m (23 ft).

These dimensions make it a major navigable waterway and a defining feature of London's geography.