River Thames level downstream at Marlow Lock

This measuring station takes 2 measurements. You're viewing the downstream level. View the upstream level.

Latest at 7:00am on 14 May

• Height: 2.18m
• Trend: Steady
• State: Normal

Normal range 2.02m to 3.23m

Height in metres over the last 5 days

We take measurements more often as the risk of flooding increases.

Download data CSV (12KB)

How levels here could affect nearby areas

• 4.73m:
  Water reaches the highest level recorded at this measuring station (10 February 2014)
• 4.27m:
  Property flooding is possible above this level
• 3.23m:
  Top of normal range. Low-lying land flooding possible above this level. One or more flood alerts may be issued.
• 2.18m:
  Latest level

Flooding might not happen again at the same historical levels. This may be because flood management schemes are now in place.

How we measure river, sea and groundwater levels

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