Thames NOW

Latest news on what the river is actually doing: Barrier, Tides, River flow, Floods

Caution: Based on automated data capture. Accuracy not guaranteed. See notes below.

SUMMARY as at 12:06 on 14 Aug 2018

 - Thames Barrier open
 - River level in Central London close to prediction
 - River flow at Kingston is lower than normal. This may result in slightly lower water levels than predicted (at both high and low tide) between Richmond and Putney.
 - Flood Alert for Thames Riverside properties

FLOOD ALERT for Thames Riverside, Putney to Teddington

Message from the Environment Agency:
The river flow at Teddington Weir is low for this time of year at 16 cubic metres per second and is steady. We anticipate the flows to remain low for the next few days. The forecast high tide at Richmond will be 4.77mAOD at 05:45 BST on 14 AUG 2018 with a high confidence and 4.64mAOD at 18:00 BST on 14 AUG 2018 with a high confidence. Astronomical tide levels are peaking.

The locations potentially affected by flooding are Putney Embankment (SW15), Chiswick Mall and Strand on the Green (W4), Thames Bank at Mortlake (SW14), Ranelagh Drive (TW1), Friars Lane and Water Lane (TW9), Riverside and The Embankment at Twickenham, and the Towpath below Teddington Lock.

Message updated: 19:41, 13 Aug
For flood alerts and warnings for other Thames areas, see the Environment Agency's Flood Information Service.

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If the PLA flow status differs from the reported Kingston flow above, this is usually because the latter is more recent.

RAW DATA as at 12:06 on 14 Aug 2018

For those of you who prefer to see the actual numbers on which the summary above was based, here is the raw data. Please note the explanations and legal note below the data.

Tide GaugeObservedPredictedSurge
Kingston flow gauge
flow rate 7.1 cumecs (m3/sec) and increasing
as at 11:00, 14 Aug - latest available data

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Tide gauge data is obtained in real time from the Port of London Authority (PLA), based normally on measurements in the previous 5 minutes. "Observed" is the actual gauged height in metres above local chart datum. "Predicted" is the astronomical prediction from the tide tables. "Surge" is the difference between the two, which typically is caused by current or recent weather conditions. The Kingston flow gauge reading and flood alert information are extracted in real time from the Environment Agency (EA). The barrier open/closed status is based solely on the difference in recorded river levels either side of the barrier (Charlton & Silvertown) and assumes accurate readings from those gauges.

I am grateful to PLA and EA for permission to use the above data.

Legal note: The recording and capture of the data is performed by automatic processes, and the data is essentially unvalidated at the time of display here. Accuracy is not guaranteed. PLA, EA and I do not accept any responsibility in law for the information presented here. - Richard Jennings

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