River level River Thames at Chertsey Lock (downstream data)

Check for flood warnings in this area

Latest recorded level 2.66m at 8:00am Saturday 4 July 2020.

View upstream data for this station

Why are there 2 sets of data for this station?

Some monitoring stations are located near to a man-made structure which affects the river's flow characteristics, for example a weir, or lock. For these stations, we provide river levels from both the upstream and downstream sides of the structure.

River levels at this location in the last 5 days

Now
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• Measured level
• When the water level reaches 3.63m here, minor flooding is possible in this area
• Highest recorded level. Hide
• Show highest recorded level

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Observed data

DateTime	Value	Error
2020-07-04T07:00Z	2.658	false
2020-07-04T06:45Z	2.657	false
2020-07-04T06:30Z	2.653	false
2020-07-04T06:15Z	2.656	false
2020-07-04T06:00Z	2.655	false
2020-07-04T05:45Z	2.658	false
2020-07-04T05:30Z	2.658	false
2020-07-04T05:15Z	2.659	false
2020-07-04T05:00Z	2.66	false
2020-07-04T04:45Z	2.657	false
2020-07-04T04:30Z	2.654	false
2020-07-04T04:15Z	2.657	false
2020-07-04T04:00Z	2.656	false
2020-07-04T03:45Z	2.658	false
2020-07-04T03:30Z	2.655	false
2020-07-04T03:15Z	2.657	false
2020-07-04T03:00Z	2.66	false
2020-07-04T02:45Z	2.656	false
2020-07-04T02:30Z	2.659	false
2020-07-04T02:15Z	2.657	false
2020-07-04T02:00Z	2.662	false
2020-07-04T01:45Z	2.662	false
2020-07-04T01:30Z	2.662	false
2020-07-04T01:15Z	2.661	false
2020-07-04T01:00Z	2.661	false
2020-07-04T00:45Z	2.662	false
2020-07-04T00:30Z	2.659	false
2020-07-04T00:15Z	2.664	false
2020-07-04T00:00Z	2.661	false
2020-07-03T23:45Z	2.66	false
2020-07-03T23:30Z	2.664	false
2020-07-03T23:15Z	2.664	false
2020-07-03T23:00Z	2.665	false
2020-07-03T22:45Z	2.664	false
2020-07-03T22:30Z	2.667	false
2020-07-03T22:15Z	2.662	false
2020-07-03T22:00Z	2.663	false
2020-07-03T21:45Z	2.663	false
2020-07-03T21:30Z	2.664	false
2020-07-03T21:15Z	2.667	false
2020-07-03T21:00Z	2.66	false
2020-07-03T20:45Z	2.664	false
2020-07-03T20:30Z	2.663	false
2020-07-03T20:15Z	2.666	false
2020-07-03T20:00Z	2.671	false
2020-07-03T19:45Z	2.666	false
2020-07-03T19:30Z	2.67	false
2020-07-03T19:15Z	2.665	false
2020-07-03T19:00Z	2.672	false
2020-07-03T18:45Z	2.67	false
2020-07-03T18:30Z	2.666	false
2020-07-03T18:15Z	2.671	false
2020-07-03T18:00Z	2.671	false
2020-07-03T17:45Z	2.676	false
2020-07-03T17:30Z	2.674	false
2020-07-03T17:15Z	2.671	false
2020-07-03T17:00Z	2.68	false
2020-07-03T16:45Z	2.66	false
2020-07-03T16:30Z	2.673	false
2020-07-03T16:15Z	2.668	false
2020-07-03T16:00Z	2.674	false
2020-07-03T15:45Z	2.672	false
2020-07-03T15:30Z	2.67	false
2020-07-03T15:15Z	2.674	false
2020-07-03T15:00Z	2.673	false
2020-07-03T14:45Z	2.67	false
2020-07-03T14:30Z	2.683	false
2020-07-03T14:15Z	2.669	false
2020-07-03T14:00Z	2.67	false
2020-07-03T13:45Z	2.674	false
2020-07-03T13:30Z	2.679	false
2020-07-03T13:15Z	2.69	false
2020-07-03T13:00Z	2.68	false
2020-07-03T12:45Z	2.684	false
2020-07-03T12:30Z	2.68	false
2020-07-03T12:15Z	2.694	false
2020-07-03T12:00Z	2.696	false
2020-07-03T11:45Z	2.69	false
2020-07-03T11:30Z	2.697	false
2020-07-03T11:15Z	2.704	false
2020-07-03T11:00Z	2.706	false
2020-07-03T10:45Z	2.701	false
2020-07-03T10:30Z	2.691	false
2020-07-03T10:15Z	2.702	false
2020-07-03T10:00Z	2.695	false
2020-07-03T09:45Z	2.695	false
2020-07-03T09:30Z	2.696	false
2020-07-03T09:15Z	2.698	false
2020-07-03T09:00Z	2.696	false
2020-07-03T08:45Z	2.693	false
2020-07-03T08:30Z	2.697	false
2020-07-03T08:15Z	2.695	false
2020-07-03T08:00Z	2.696	false
2020-07-03T07:45Z	2.698	false
2020-07-03T07:30Z	2.697	false
2020-07-03T07:15Z	2.694	false
2020-07-03T07:00Z	2.695	false
2020-07-03T06:45Z	2.696	false
2020-07-03T06:30Z	2.694	false
2020-07-03T06:15Z	2.695	false
2020-07-03T06:00Z	2.694	false
2020-07-03T05:45Z	2.694	false
2020-07-03T05:30Z	2.693	false
2020-07-03T05:15Z	2.692	false
2020-07-03T05:00Z	2.692	false
2020-07-03T04:45Z	2.691	false
2020-07-03T04:30Z	2.691	false
2020-07-03T04:15Z	2.691	false
2020-07-03T04:00Z	2.691	false
2020-07-03T03:45Z	2.691	false
2020-07-03T03:30Z	2.691	false
2020-07-03T03:15Z	2.691	false
2020-07-03T03:00Z	2.691	false
2020-07-03T02:45Z	2.691	false
2020-07-03T02:30Z	2.691	false
2020-07-03T02:15Z	2.691	false
2020-07-03T02:00Z	2.691	false
2020-07-03T01:45Z	2.692	false
2020-07-03T01:30Z	2.693	false
2020-07-03T01:15Z	2.693	false
2020-07-03T01:00Z	2.694	false
2020-07-03T00:45Z	2.694	false
2020-07-03T00:30Z	2.695	false
2020-07-03T00:15Z	2.694	false
2020-07-03T00:00Z	2.696	false
2020-07-02T23:45Z	2.696	false
2020-07-02T23:30Z	2.696	false
2020-07-02T23:15Z	2.697	false
2020-07-02T23:00Z	2.697	false
2020-07-02T22:45Z	2.696	false
2020-07-02T22:30Z	2.698	false
2020-07-02T22:15Z	2.696	false
2020-07-02T22:00Z	2.697	false
2020-07-02T21:45Z	2.697	false
2020-07-02T21:30Z	2.697	false
2020-07-02T21:15Z	2.697	false
2020-07-02T21:00Z	2.699	false
2020-07-02T20:45Z	2.699	false
2020-07-02T20:30Z	2.699	false
2020-07-02T20:15Z	2.7	false
2020-07-02T20:00Z	2.698	false
2020-07-02T19:45Z	2.7	false
2020-07-02T19:30Z	2.688	false
2020-07-02T19:15Z	2.699	false
2020-07-02T19:00Z	2.699	false
2020-07-02T18:45Z	2.699	false
2020-07-02T18:30Z	2.698	false
2020-07-02T18:15Z	2.697	false
2020-07-02T18:00Z	2.7	false
2020-07-02T17:45Z	2.707	false
2020-07-02T17:30Z	2.698	false
2020-07-02T17:15Z	2.703	false
2020-07-02T17:00Z	2.71	false
2020-07-02T16:45Z	2.704	false
2020-07-02T16:30Z	2.7	false
2020-07-02T16:15Z	2.705	false
2020-07-02T16:00Z	2.701	false
2020-07-02T15:45Z	2.7	false
2020-07-02T15:30Z	2.701	false
2020-07-02T15:15Z	2.702	false
2020-07-02T15:00Z	2.701	false
2020-07-02T14:45Z	2.701	false
2020-07-02T14:30Z	2.695	false
2020-07-02T14:15Z	2.7	false
2020-07-02T14:00Z	2.7	false
2020-07-02T13:45Z	2.696	false
2020-07-02T13:30Z	2.695	false
2020-07-02T13:15Z	2.698	false
2020-07-02T13:00Z	2.697	false
2020-07-02T12:45Z	2.695	false
2020-07-02T12:30Z	2.692	false
2020-07-02T12:15Z	2.693	false
2020-07-02T12:00Z	2.693	false
2020-07-02T11:45Z	2.691	false
2020-07-02T11:30Z	2.69	false
2020-07-02T11:15Z	2.686	false
2020-07-02T11:00Z	2.684	false
2020-07-02T10:45Z	2.688	false
2020-07-02T10:30Z	2.694	false
2020-07-02T10:15Z	2.687	false
2020-07-02T10:00Z	2.689	false
2020-07-02T09:45Z	2.694	false
2020-07-02T09:30Z	2.69	false
2020-07-02T09:15Z	2.691	false
2020-07-02T09:00Z	2.688	false
2020-07-02T08:45Z	2.688	false
2020-07-02T08:30Z	2.686	false
2020-07-02T08:15Z	2.685	false
2020-07-02T08:00Z	2.685	false
2020-07-02T07:45Z	2.682	false
2020-07-02T07:30Z	2.682	false
2020-07-02T07:15Z	2.681	false
2020-07-02T07:00Z	2.678	false
2020-07-02T06:45Z	2.68	false
2020-07-02T06:30Z	2.68	false
2020-07-02T06:15Z	2.679	false
2020-07-02T06:00Z	2.68	false
2020-07-02T05:45Z	2.679	false
2020-07-02T05:30Z	2.68	false
2020-07-02T05:15Z	2.679	false
2020-07-02T05:00Z	2.679	false
2020-07-02T04:45Z	2.678	false
2020-07-02T04:30Z	2.679	false
2020-07-02T04:15Z	2.679	false
2020-07-02T04:00Z	2.678	false
2020-07-02T03:45Z	2.679	false
2020-07-02T03:30Z	2.679	false
2020-07-02T03:15Z	2.678	false
2020-07-02T03:00Z	2.679	false
2020-07-02T02:45Z	2.679	false
2020-07-02T02:30Z	2.679	false
2020-07-02T02:15Z	2.679	false
2020-07-02T02:00Z	2.679	false
2020-07-02T01:45Z	2.679	false
2020-07-02T01:30Z	2.679	false
2020-07-02T01:15Z	2.678	false
2020-07-02T01:00Z	2.679	false
2020-07-02T00:45Z	2.679	false
2020-07-02T00:30Z	2.68	false
2020-07-02T00:15Z	2.679	false
2020-07-02T00:00Z	2.679	false
2020-07-01T23:45Z	2.679	false
2020-07-01T23:30Z	2.679	false
2020-07-01T23:15Z	2.68	false
2020-07-01T23:00Z	2.68	false
2020-07-01T22:45Z	2.679	false
2020-07-01T22:30Z	2.679	false
2020-07-01T22:15Z	2.68	false
2020-07-01T22:00Z	2.68	false
2020-07-01T21:45Z	2.68	false
2020-07-01T21:30Z	2.682	false
2020-07-01T21:15Z	2.68	false
2020-07-01T21:00Z	2.682	false
2020-07-01T20:45Z	2.682	false
2020-07-01T20:30Z	2.683	false
2020-07-01T20:15Z	2.683	false
2020-07-01T20:00Z	2.684	false
2020-07-01T19:45Z	2.684	false
2020-07-01T19:30Z	2.686	false
2020-07-01T19:15Z	2.687	false
2020-07-01T19:00Z	2.685	false
2020-07-01T18:45Z	2.688	false
2020-07-01T18:30Z	2.685	false
2020-07-01T18:15Z	2.685	false
2020-07-01T18:00Z	2.686	false
2020-07-01T17:45Z	2.683	false
2020-07-01T17:30Z	2.69	false
2020-07-01T17:15Z	2.684	false
2020-07-01T17:00Z	2.68	false
2020-07-01T16:45Z	2.68	false
2020-07-01T16:30Z	2.681	false
2020-07-01T16:15Z	2.679	false
2020-07-01T16:00Z	2.678	false
2020-07-01T15:45Z	2.668	false
2020-07-01T15:30Z	2.683	false
2020-07-01T15:15Z	2.685	false
2020-07-01T15:00Z	2.678	false
2020-07-01T14:45Z	2.68	false
2020-07-01T14:30Z	2.68	false
2020-07-01T14:15Z	2.669	false
2020-07-01T14:00Z	2.682	false
2020-07-01T13:45Z	2.681	false
2020-07-01T13:30Z	2.673	false
2020-07-01T13:15Z	2.676	false
2020-07-01T13:00Z	2.684	false
2020-07-01T12:45Z	2.671	false
2020-07-01T12:30Z	2.681	false
2020-07-01T12:15Z	2.674	false
2020-07-01T12:00Z	2.686	false
2020-07-01T11:45Z	2.689	false
2020-07-01T11:30Z	2.685	false
2020-07-01T11:15Z	2.675	false
2020-07-01T11:00Z	2.693	false
2020-07-01T10:45Z	2.684	false
2020-07-01T10:30Z	2.671	false
2020-07-01T10:15Z	2.677	false
2020-07-01T10:00Z	2.677	false
2020-07-01T09:45Z	2.679	false
2020-07-01T09:30Z	2.682	false
2020-07-01T09:15Z	2.683	false
2020-07-01T09:00Z	2.671	false
2020-07-01T08:45Z	2.678	false
2020-07-01T08:30Z	2.676	false
2020-07-01T08:15Z	2.681	false
2020-07-01T08:00Z	2.679	false
2020-07-01T07:45Z	2.68	false
2020-07-01T07:30Z	2.683	false
2020-07-01T07:15Z	2.678	false
2020-07-01T07:00Z	2.684	false
2020-07-01T06:45Z	2.683	false
2020-07-01T06:30Z	2.687	false
2020-07-01T06:15Z	2.686	false
2020-07-01T06:00Z	2.686	false
2020-07-01T05:45Z	2.691	false
2020-07-01T05:30Z	2.69	false
2020-07-01T05:15Z	2.69	false
2020-07-01T05:00Z	2.69	false
2020-07-01T04:45Z	2.69	false
2020-07-01T04:30Z	2.691	false
2020-07-01T04:15Z	2.69	false
2020-07-01T04:00Z	2.69	false
2020-07-01T03:45Z	2.69	false
2020-07-01T03:30Z	2.691	false
2020-07-01T03:15Z	2.69	false
2020-07-01T03:00Z	2.691	false
2020-07-01T02:45Z	2.69	false
2020-07-01T02:30Z	2.69	false
2020-07-01T02:15Z	2.691	false
2020-07-01T02:00Z	2.691	false
2020-07-01T01:45Z	2.691	false
2020-07-01T01:30Z	2.691	false
2020-07-01T01:15Z	2.691	false
2020-07-01T01:00Z	2.689	false
2020-07-01T00:45Z	2.688	false
2020-07-01T00:30Z	2.69	false
2020-07-01T00:15Z	2.69	false
2020-07-01T00:00Z	2.69	false
2020-06-30T23:45Z	2.69	false
2020-06-30T23:30Z	2.69	false
2020-06-30T23:15Z	2.689	false
2020-06-30T23:00Z	2.69	false
2020-06-30T22:45Z	2.69	false
2020-06-30T22:30Z	2.689	false
2020-06-30T22:15Z	2.689	false
2020-06-30T22:00Z	2.689	false
2020-06-30T21:45Z	2.688	false
2020-06-30T21:30Z	2.688	false
2020-06-30T21:15Z	2.687	false
2020-06-30T21:00Z	2.688	false
2020-06-30T20:45Z	2.687	false
2020-06-30T20:30Z	2.689	false
2020-06-30T20:15Z	2.687	false
2020-06-30T20:00Z	2.686	false
2020-06-30T19:45Z	2.689	false
2020-06-30T19:30Z	2.685	false
2020-06-30T19:15Z	2.685	false
2020-06-30T19:00Z	2.687	false
2020-06-30T18:45Z	2.686	false
2020-06-30T18:30Z	2.686	false
2020-06-30T18:15Z	2.685	false
2020-06-30T18:00Z	2.685	false
2020-06-30T17:45Z	2.685	false
2020-06-30T17:30Z	2.688	false
2020-06-30T17:15Z	2.686	false
2020-06-30T17:00Z	2.685	false
2020-06-30T16:45Z	2.685	false
2020-06-30T16:30Z	2.686	false
2020-06-30T16:15Z	2.685	false
2020-06-30T16:00Z	2.683	false
2020-06-30T15:45Z	2.684	false
2020-06-30T15:30Z	2.685	false
2020-06-30T15:15Z	2.685	false
2020-06-30T15:00Z	2.693	false
2020-06-30T14:45Z	2.68	false
2020-06-30T14:30Z	2.68	false
2020-06-30T14:15Z	2.695	false
2020-06-30T14:00Z	2.687	false
2020-06-30T13:45Z	0.018	false
2020-06-30T13:30Z	0	false
2020-06-29T12:30Z	2.621	false
2020-06-29T12:15Z	2.621	false
2020-06-29T12:00Z	2.621	false
2020-06-29T11:45Z	2.621	false
2020-06-29T08:45Z	2.707	false
2020-06-29T08:45Z	2.707	false
2020-06-29T08:30Z	2.707	false
2020-06-29T08:30Z	2.707	false
2020-06-29T08:15Z	2.713	false
2020-06-29T08:15Z	2.713	false
2020-06-29T08:00Z	2.71	false
2020-06-29T08:00Z	2.71	false
2020-06-29T07:45Z	2.713	false
2020-06-29T07:45Z	2.713	false
2020-06-29T07:30Z	2.717	false
2020-06-29T07:30Z	2.717	false
2020-06-29T07:15Z	2.717	false
2020-06-29T07:15Z	2.717	false
2020-06-29T07:00Z	2.72	false
2020-06-29T07:00Z	2.72	false
2020-06-29T06:45Z	2.727	false
2020-06-29T06:45Z	2.727	false
2020-06-29T06:30Z	2.725	false
2020-06-29T06:30Z	2.725	false
2020-06-29T06:15Z	2.724	false
2020-06-29T06:15Z	2.724	false
2020-06-29T06:00Z	2.729	false
2020-06-29T05:45Z	2.73	false
2020-06-29T05:30Z	2.728	false
2020-06-29T05:15Z	2.725	false
2020-06-29T05:00Z	2.723	false
2020-06-29T04:45Z	2.717	false
2020-06-29T04:30Z	2.717	false
2020-06-29T04:15Z	2.722	false
2020-06-29T04:00Z	2.719	false
2020-06-29T03:45Z	2.72	false
2020-06-29T03:30Z	2.721	false
2020-06-29T03:15Z	2.722	false
2020-06-29T03:00Z	2.72	false
2020-06-29T02:45Z	2.722	false
2020-06-29T02:30Z	2.721	false
2020-06-29T02:15Z	2.722	false
2020-06-29T02:00Z	2.721	false
2020-06-29T01:45Z	2.719	false
2020-06-29T01:30Z	2.718	false
2020-06-29T01:15Z	2.714	false
2020-06-29T01:00Z	2.711	false
2020-06-29T00:45Z	2.708	false
2020-06-29T00:30Z	2.705	false
2020-06-29T00:15Z	2.698	false
2020-06-29T00:00Z	2.698	false
2020-06-28T23:45Z	2.694	false
2020-06-28T23:30Z	2.695	false
2020-06-28T23:15Z	2.692	false
2020-06-28T23:00Z	2.691	false
2020-06-28T22:45Z	2.689	false
2020-06-28T22:30Z	2.689	false
2020-06-28T22:15Z	2.689	false
2020-06-28T22:00Z	2.688	false
2020-06-28T21:45Z	2.688	false
2020-06-28T21:30Z	2.688	false
2020-06-28T21:15Z	2.687	false
2020-06-28T21:00Z	2.684	false
2020-06-28T20:45Z	2.686	false
2020-06-28T20:30Z	2.684	false
2020-06-28T20:15Z	2.684	false
2020-06-28T20:00Z	2.67	false
2020-06-28T19:45Z	2.683	false
2020-06-28T19:30Z	2.681	false
2020-06-28T19:15Z	2.677	false
2020-06-28T19:00Z	2.676	false
2020-06-28T18:45Z	2.674	false
2020-06-28T18:30Z	2.677	false
2020-06-28T18:15Z	2.671	false
2020-06-28T18:00Z	2.673	false
2020-06-28T17:45Z	2.669	false
2020-06-28T17:30Z	2.674	false
2020-06-28T17:15Z	2.667	false
2020-06-28T17:00Z	2.663	false
2020-06-28T16:45Z	2.67	false
2020-06-28T16:30Z	2.67	false
2020-06-28T16:15Z	2.659	false
2020-06-28T16:00Z	2.652	false
2020-06-28T15:45Z	2.655	false
2020-06-28T15:30Z	2.659	false
2020-06-28T15:15Z	2.66	false
2020-06-28T15:00Z	2.653	false
2020-06-28T14:45Z	2.658	false
2020-06-28T14:30Z	2.651	false
2020-06-28T14:15Z	2.655	false
2020-06-28T14:00Z	2.653	false
2020-06-28T13:45Z	2.654	false
2020-06-28T13:30Z	2.662	false
2020-06-28T13:15Z	2.656	false
2020-06-28T13:00Z	2.658	false
2020-06-28T12:45Z	2.659	false
2020-06-28T12:30Z	2.654	false
2020-06-28T12:15Z	2.653	false
2020-06-28T12:00Z	2.654	false

Forecast data

Key information

• Station name: Chertsey Lock (downstream)
• Station ID: 7215
• River name: River Thames
• Typical range: 2.62m to 3.63m
• Highest level on record: 4.59m on 11 February 2014
• Site datum: 7.63mAOD (what does this mean?)

How are river levels measured?

The Environment agency uses a network of monitoring stations across the country. Each one has its own datum - a height in metres fixed relative to mean sea level. This height is expressed as metres above ordnance datum (mAOD). The river levels we provide for each monitoring station are all relative to its site datum.

If we didn't do this, we'd show some very high measurements, which could cause confusion. By using a local site datum, the river levels are easier to understand, especially by users familiar with the data from a particular monitoring station.

A river's height above ordnance datum can be seen by adding the site datum to the river level.

How often are river levels measured?

We use measuring stations like this one to collect water level data, usually once or twice a day. We collect data more frequently when there's a greater risk of flooding. That's why the graph might show a short time lag since the last measurement.

How might river levels affect flood risk?

Typical range

This is the usual range of river levels at this station, based on historical data.

Above typical

This means that flooding is possible because river levels at this station are currently higher than usual.
Many factors can influence the possibility of flooding - river levels are only one indicator. Always check if there's a flood warning in place at a particular location.

Below typical

This means that river levels at this station are currently lower than usual.
Drought or water management measures may be in place. Please check for the latest information on water resources and restrictions in your area.

• View nearby measuring stations

• View the flood information service for England
• View your property's long term risk of flooding

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