River level River Thames at Sonning Lock (downstream data)

Check for flood warnings in this area

Latest recorded level 1.95m at 2:00pm Wednesday 21 August 2019.

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 3.18m 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
2019-08-21T13:00Z	1.949	false
2019-08-21T12:45Z	1.951	false
2019-08-21T12:30Z	1.95	false
2019-08-21T12:15Z	1.953	false
2019-08-21T12:00Z	1.958	false
2019-08-21T11:45Z	1.952	false
2019-08-21T11:30Z	1.955	false
2019-08-21T11:15Z	1.956	false
2019-08-21T11:00Z	1.953	false
2019-08-21T10:45Z	1.961	false
2019-08-21T10:30Z	1.955	false
2019-08-21T10:15Z	1.957	false
2019-08-21T10:00Z	1.955	false
2019-08-21T09:45Z	1.953	false
2019-08-21T09:30Z	1.954	false
2019-08-21T09:15Z	1.954	false
2019-08-21T09:00Z	1.956	false
2019-08-21T08:45Z	1.957	false
2019-08-21T08:30Z	1.962	false
2019-08-21T08:15Z	1.951	false
2019-08-21T08:00Z	1.953	false
2019-08-21T07:45Z	1.951	false
2019-08-21T07:30Z	1.949	false
2019-08-21T07:15Z	1.949	false
2019-08-21T07:00Z	1.95	false
2019-08-21T06:45Z	1.949	false
2019-08-21T06:30Z	1.946	false
2019-08-21T06:15Z	1.947	false
2019-08-21T06:00Z	1.946	false
2019-08-21T05:45Z	1.947	false
2019-08-21T05:30Z	1.947	false
2019-08-21T05:15Z	1.947	false
2019-08-21T05:00Z	1.947	false
2019-08-21T04:45Z	1.947	false
2019-08-21T04:30Z	1.947	false
2019-08-21T04:15Z	1.948	false
2019-08-21T04:00Z	1.947	false
2019-08-21T03:45Z	1.948	false
2019-08-21T03:30Z	1.947	false
2019-08-21T03:15Z	1.947	false
2019-08-21T03:00Z	1.947	false
2019-08-21T02:45Z	1.947	false
2019-08-21T02:30Z	1.946	false
2019-08-21T02:15Z	1.946	false
2019-08-21T02:00Z	1.946	false
2019-08-21T01:45Z	1.946	false
2019-08-21T01:30Z	1.946	false
2019-08-21T01:15Z	1.945	false
2019-08-21T01:00Z	1.946	false
2019-08-21T00:45Z	1.946	false
2019-08-21T00:30Z	1.946	false
2019-08-21T00:15Z	1.945	false
2019-08-21T00:00Z	1.945	false
2019-08-20T23:45Z	1.945	false
2019-08-20T23:30Z	1.945	false
2019-08-20T23:15Z	1.945	false
2019-08-20T23:00Z	1.946	false
2019-08-20T22:45Z	1.945	false
2019-08-20T22:30Z	1.946	false
2019-08-20T22:15Z	1.946	false
2019-08-20T22:00Z	1.945	false
2019-08-20T21:45Z	1.945	false
2019-08-20T21:30Z	1.945	false
2019-08-20T21:15Z	1.945	false
2019-08-20T21:00Z	1.945	false
2019-08-20T20:45Z	1.945	false
2019-08-20T20:30Z	1.946	false
2019-08-20T20:15Z	1.945	false
2019-08-20T20:00Z	1.945	false
2019-08-20T19:45Z	1.945	false
2019-08-20T19:30Z	1.946	false
2019-08-20T19:15Z	1.946	false
2019-08-20T19:00Z	1.946	false
2019-08-20T18:45Z	1.947	false
2019-08-20T18:30Z	1.948	false
2019-08-20T18:15Z	1.947	false
2019-08-20T18:00Z	1.948	false
2019-08-20T17:45Z	1.949	false
2019-08-20T17:30Z	1.946	false
2019-08-20T17:15Z	1.951	false
2019-08-20T17:00Z	1.949	false
2019-08-20T16:45Z	1.952	false
2019-08-20T16:30Z	1.951	false
2019-08-20T16:15Z	1.953	false
2019-08-20T16:00Z	1.949	false
2019-08-20T15:45Z	1.956	false
2019-08-20T15:30Z	1.951	false
2019-08-20T15:15Z	1.95	false
2019-08-20T15:00Z	1.955	false
2019-08-20T14:45Z	1.952	false
2019-08-20T14:30Z	1.957	false
2019-08-20T14:15Z	1.953	false
2019-08-20T14:00Z	1.957	false
2019-08-20T13:45Z	1.962	false
2019-08-20T13:30Z	1.956	false
2019-08-20T13:15Z	1.953	false
2019-08-20T13:00Z	1.96	false
2019-08-20T12:45Z	1.962	false
2019-08-20T12:30Z	1.955	false
2019-08-20T12:15Z	1.957	false
2019-08-20T12:00Z	1.956	false
2019-08-20T11:45Z	1.957	false
2019-08-20T11:30Z	1.959	false
2019-08-20T11:15Z	1.957	false
2019-08-20T11:00Z	1.96	false
2019-08-20T10:45Z	1.958	false
2019-08-20T10:30Z	1.962	false
2019-08-20T10:15Z	1.966	false
2019-08-20T10:00Z	1.958	false
2019-08-20T09:45Z	1.957	false
2019-08-20T09:30Z	1.963	false
2019-08-20T09:15Z	1.956	false
2019-08-20T09:00Z	1.953	false
2019-08-20T08:45Z	1.96	false
2019-08-20T08:30Z	1.951	false
2019-08-20T08:15Z	1.954	false
2019-08-20T08:00Z	1.956	false
2019-08-20T07:45Z	1.952	false
2019-08-20T07:30Z	1.954	false
2019-08-20T07:15Z	1.958	false
2019-08-20T07:00Z	1.952	false
2019-08-20T06:45Z	1.948	false
2019-08-20T06:30Z	1.948	false
2019-08-20T06:15Z	1.955	false
2019-08-20T06:00Z	1.947	false
2019-08-20T05:45Z	1.948	false
2019-08-20T05:30Z	1.948	false
2019-08-20T05:15Z	1.948	false
2019-08-20T05:00Z	1.948	false
2019-08-20T04:45Z	1.949	false
2019-08-20T04:30Z	1.95	false
2019-08-20T04:15Z	1.95	false
2019-08-20T04:00Z	1.95	false
2019-08-20T03:45Z	1.951	false
2019-08-20T03:30Z	1.951	false
2019-08-20T03:15Z	1.951	false
2019-08-20T03:00Z	1.951	false
2019-08-20T02:45Z	1.951	false
2019-08-20T02:30Z	1.952	false
2019-08-20T02:15Z	1.953	false
2019-08-20T02:00Z	1.953	false
2019-08-20T01:45Z	1.953	false
2019-08-20T01:30Z	1.953	false
2019-08-20T01:15Z	1.953	false
2019-08-20T01:00Z	1.952	false
2019-08-20T00:45Z	1.953	false
2019-08-20T00:30Z	1.953	false
2019-08-20T00:15Z	1.953	false
2019-08-20T00:00Z	1.952	false
2019-08-19T23:45Z	1.953	false
2019-08-19T23:30Z	1.953	false
2019-08-19T23:15Z	1.953	false
2019-08-19T23:00Z	1.953	false
2019-08-19T22:45Z	1.953	false
2019-08-19T22:30Z	1.953	false
2019-08-19T22:15Z	1.953	false
2019-08-19T22:00Z	1.953	false
2019-08-19T21:45Z	1.952	false
2019-08-19T21:30Z	1.952	false
2019-08-19T21:15Z	1.952	false
2019-08-19T21:00Z	1.952	false
2019-08-19T20:45Z	1.952	false
2019-08-19T20:30Z	1.952	false
2019-08-19T20:15Z	1.952	false
2019-08-19T20:00Z	1.954	false
2019-08-19T19:45Z	1.954	false
2019-08-19T19:30Z	1.954	false
2019-08-19T19:15Z	1.953	false
2019-08-19T19:00Z	1.955	false
2019-08-19T18:45Z	1.954	false
2019-08-19T18:30Z	1.955	false
2019-08-19T18:15Z	1.954	false
2019-08-19T18:00Z	1.954	false
2019-08-19T17:45Z	1.958	false
2019-08-19T17:30Z	1.953	false
2019-08-19T17:15Z	1.956	false
2019-08-19T17:00Z	1.953	false
2019-08-19T16:45Z	1.955	false
2019-08-19T16:30Z	1.957	false
2019-08-19T16:15Z	1.956	false
2019-08-19T16:00Z	1.96	false
2019-08-19T15:45Z	1.954	false
2019-08-19T15:30Z	1.955	false
2019-08-19T15:15Z	1.951	false
2019-08-19T15:00Z	1.955	false
2019-08-19T14:45Z	1.956	false
2019-08-19T14:30Z	1.957	false
2019-08-19T14:15Z	1.951	false
2019-08-19T14:00Z	1.952	false
2019-08-19T13:45Z	1.949	false
2019-08-19T13:30Z	1.95	false
2019-08-19T13:15Z	1.949	false
2019-08-19T13:00Z	1.95	false
2019-08-19T12:45Z	1.954	false
2019-08-19T12:30Z	1.96	false
2019-08-19T12:15Z	1.956	false
2019-08-19T12:00Z	1.952	false
2019-08-19T11:45Z	1.959	false
2019-08-19T11:30Z	1.96	false
2019-08-19T11:15Z	1.96	false
2019-08-19T11:00Z	1.96	false
2019-08-19T11:00Z	1.96	false
2019-08-19T10:45Z	1.959	false
2019-08-19T10:45Z	1.959	false
2019-08-19T10:30Z	1.955	false
2019-08-19T10:30Z	1.955	false
2019-08-19T10:15Z	1.961	false
2019-08-19T10:15Z	1.961	false
2019-08-19T10:00Z	1.953	false
2019-08-19T09:45Z	1.951	false
2019-08-19T09:30Z	1.949	false
2019-08-19T09:15Z	1.951	false
2019-08-19T09:00Z	1.951	false
2019-08-19T08:45Z	1.951	false
2019-08-19T08:30Z	1.951	false
2019-08-19T08:15Z	1.952	false
2019-08-19T08:00Z	1.947	false
2019-08-19T07:45Z	1.957	false
2019-08-19T07:30Z	1.948	false
2019-08-19T07:15Z	1.953	false
2019-08-19T07:00Z	1.947	false
2019-08-19T06:45Z	1.945	false
2019-08-19T06:30Z	1.942	false
2019-08-19T06:15Z	1.943	false
2019-08-19T06:00Z	1.941	false
2019-08-19T05:45Z	1.943	false
2019-08-19T05:30Z	1.942	false
2019-08-19T05:15Z	1.943	false
2019-08-19T05:00Z	1.943	false
2019-08-19T04:45Z	1.944	false
2019-08-19T04:30Z	1.944	false
2019-08-19T04:15Z	1.944	false
2019-08-19T04:00Z	1.945	false
2019-08-19T03:45Z	1.945	false
2019-08-19T03:30Z	1.945	false
2019-08-19T03:15Z	1.945	false
2019-08-19T03:00Z	1.946	false
2019-08-19T02:45Z	1.946	false
2019-08-19T02:30Z	1.946	false
2019-08-19T02:15Z	1.947	false
2019-08-19T02:00Z	1.947	false
2019-08-19T01:45Z	1.945	false
2019-08-19T01:30Z	1.947	false
2019-08-19T01:15Z	1.946	false
2019-08-19T01:00Z	1.945	false
2019-08-19T00:45Z	1.947	false
2019-08-19T00:30Z	1.947	false
2019-08-19T00:15Z	1.946	false
2019-08-19T00:00Z	1.948	false
2019-08-18T23:45Z	1.947	false
2019-08-18T23:30Z	1.947	false
2019-08-18T23:15Z	1.948	false
2019-08-18T23:00Z	1.948	false
2019-08-18T22:45Z	1.949	false
2019-08-18T22:30Z	1.949	false
2019-08-18T22:15Z	1.949	false
2019-08-18T22:00Z	1.949	false
2019-08-18T21:45Z	1.949	false
2019-08-18T21:30Z	1.949	false
2019-08-18T21:15Z	1.95	false
2019-08-18T21:00Z	1.951	false
2019-08-18T20:45Z	1.95	false
2019-08-18T20:30Z	1.95	false
2019-08-18T20:15Z	1.951	false
2019-08-18T20:00Z	1.951	false
2019-08-18T19:45Z	1.953	false
2019-08-18T19:30Z	1.951	false
2019-08-18T19:15Z	1.952	false
2019-08-18T19:00Z	1.955	false
2019-08-18T18:45Z	1.953	false
2019-08-18T18:30Z	1.954	false
2019-08-18T18:15Z	1.957	false
2019-08-18T18:00Z	1.955	false
2019-08-18T17:45Z	1.954	false
2019-08-18T17:30Z	1.953	false
2019-08-18T17:15Z	1.961	false
2019-08-18T17:00Z	1.955	false
2019-08-18T16:45Z	1.956	false
2019-08-18T16:30Z	1.957	false
2019-08-18T16:15Z	1.957	false
2019-08-18T16:00Z	1.957	false
2019-08-18T15:45Z	1.966	false
2019-08-18T15:30Z	1.961	false
2019-08-18T15:15Z	1.962	false
2019-08-18T15:00Z	1.955	false
2019-08-18T14:45Z	1.964	false
2019-08-18T14:30Z	1.961	false
2019-08-18T14:15Z	1.958	false
2019-08-18T14:00Z	1.968	false
2019-08-18T13:45Z	1.959	false
2019-08-18T13:30Z	1.958	false
2019-08-18T13:15Z	1.967	false
2019-08-18T13:00Z	1.96	false
2019-08-18T12:45Z	1.96	false
2019-08-18T12:30Z	1.957	false
2019-08-18T12:15Z	1.965	false
2019-08-18T12:00Z	1.958	false
2019-08-18T11:45Z	1.956	false
2019-08-18T11:30Z	1.963	false
2019-08-18T11:15Z	1.963	false
2019-08-18T11:00Z	1.964	false
2019-08-18T10:45Z	1.966	false
2019-08-18T10:30Z	1.958	false
2019-08-18T10:15Z	1.959	false
2019-08-18T10:00Z	1.96	false
2019-08-18T09:45Z	1.96	false
2019-08-18T09:30Z	1.963	false
2019-08-18T09:15Z	1.961	false
2019-08-18T09:00Z	1.962	false
2019-08-18T08:45Z	1.961	false
2019-08-18T08:30Z	1.967	false
2019-08-18T08:15Z	1.968	false
2019-08-18T08:00Z	1.967	false
2019-08-18T07:45Z	1.966	false
2019-08-18T07:30Z	1.968	false
2019-08-18T07:15Z	1.966	false
2019-08-18T07:00Z	1.967	false
2019-08-18T06:45Z	1.968	false
2019-08-18T06:30Z	1.969	false
2019-08-18T06:15Z	1.969	false
2019-08-18T06:00Z	1.97	false
2019-08-18T05:45Z	1.971	false
2019-08-18T05:30Z	1.972	false
2019-08-18T05:15Z	1.973	false
2019-08-18T05:00Z	1.974	false
2019-08-18T04:45Z	1.974	false
2019-08-18T04:30Z	1.976	false
2019-08-18T04:15Z	1.975	false
2019-08-18T04:00Z	1.977	false
2019-08-18T03:45Z	1.978	false
2019-08-18T03:30Z	1.978	false
2019-08-18T03:15Z	1.979	false
2019-08-18T03:00Z	1.98	false
2019-08-18T02:45Z	1.98	false
2019-08-18T02:30Z	1.981	false
2019-08-18T02:15Z	1.982	false
2019-08-18T02:00Z	1.982	false
2019-08-18T01:45Z	1.982	false
2019-08-18T01:30Z	1.984	false
2019-08-18T01:15Z	1.984	false
2019-08-18T01:00Z	1.985	false
2019-08-18T00:45Z	1.986	false
2019-08-18T00:30Z	1.986	false
2019-08-18T00:15Z	1.987	false
2019-08-18T00:00Z	1.988	false
2019-08-17T23:45Z	1.989	false
2019-08-17T23:30Z	1.991	false
2019-08-17T23:15Z	1.991	false
2019-08-17T23:00Z	1.992	false
2019-08-17T22:45Z	1.993	false
2019-08-17T22:30Z	1.994	false
2019-08-17T22:15Z	1.993	false
2019-08-17T22:00Z	1.994	false
2019-08-17T21:45Z	1.994	false
2019-08-17T21:30Z	1.995	false
2019-08-17T21:15Z	1.999	false
2019-08-17T21:00Z	1.997	false
2019-08-17T20:45Z	1.999	false
2019-08-17T20:30Z	2.002	false
2019-08-17T20:15Z	2.005	false
2019-08-17T20:00Z	2.004	false
2019-08-17T19:45Z	2.009	false
2019-08-17T19:30Z	2.005	false
2019-08-17T19:15Z	2.008	false
2019-08-17T19:00Z	2.005	false
2019-08-17T18:45Z	2.011	false
2019-08-17T18:30Z	2.011	false
2019-08-17T18:15Z	2.013	false
2019-08-17T18:00Z	2.012	false
2019-08-17T17:45Z	2.017	false
2019-08-17T17:30Z	2.013	false
2019-08-17T17:15Z	2.025	false
2019-08-17T17:00Z	2.016	false
2019-08-17T16:45Z	2.022	false
2019-08-17T16:30Z	2.018	false
2019-08-17T16:15Z	2.022	false
2019-08-17T16:00Z	2.02	false
2019-08-17T15:45Z	2.027	false
2019-08-17T15:30Z	2.026	false
2019-08-17T15:15Z	2.027	false
2019-08-17T15:00Z	2.026	false
2019-08-17T14:45Z	2.026	false
2019-08-17T14:30Z	2.03	false
2019-08-17T14:15Z	2.029	false
2019-08-17T14:00Z	2.027	false
2019-08-17T13:45Z	2.032	false
2019-08-17T13:30Z	2.031	false
2019-08-17T13:15Z	2.032	false
2019-08-17T13:00Z	2.03	false
2019-08-17T12:45Z	2.037	false
2019-08-17T12:30Z	2.036	false
2019-08-17T12:15Z	2.036	false
2019-08-17T12:00Z	2.04	false
2019-08-17T11:45Z	2.038	false
2019-08-17T11:30Z	2.036	false
2019-08-17T11:15Z	2.039	false
2019-08-17T11:00Z	2.037	false
2019-08-17T10:45Z	2.037	false
2019-08-17T10:30Z	2.033	false
2019-08-17T10:15Z	2.046	false
2019-08-17T10:00Z	2.04	false
2019-08-17T09:45Z	2.038	false
2019-08-17T09:30Z	2.031	false
2019-08-17T09:15Z	2.034	false
2019-08-17T09:00Z	2.032	false
2019-08-17T08:45Z	2.036	false
2019-08-17T08:30Z	2.034	false
2019-08-17T08:15Z	2.034	false
2019-08-17T08:00Z	2.034	false
2019-08-17T07:45Z	2.037	false
2019-08-17T07:30Z	2.034	false
2019-08-17T07:15Z	2.035	false
2019-08-17T07:00Z	2.033	false
2019-08-17T06:45Z	2.03	false
2019-08-17T06:30Z	2.031	false
2019-08-17T06:15Z	2.031	false
2019-08-17T06:00Z	2.03	false
2019-08-17T05:45Z	2.03	false
2019-08-17T05:30Z	2.031	false
2019-08-17T05:15Z	2.029	false
2019-08-17T05:00Z	2.028	false
2019-08-17T04:45Z	2.027	false
2019-08-17T04:30Z	2.026	false
2019-08-17T04:15Z	2.024	false
2019-08-17T04:00Z	2.023	false
2019-08-17T03:45Z	2.022	false
2019-08-17T03:30Z	2.019	false
2019-08-17T03:15Z	2.016	false
2019-08-17T03:00Z	2.015	false
2019-08-17T02:45Z	2.012	false
2019-08-17T02:30Z	2.01	false
2019-08-17T02:15Z	2.007	false
2019-08-17T02:00Z	2.004	false
2019-08-17T01:45Z	2.004	false
2019-08-17T01:30Z	2.002	false
2019-08-17T01:15Z	2	false
2019-08-17T01:00Z	1.999	false
2019-08-17T00:45Z	1.997	false
2019-08-17T00:30Z	1.996	false
2019-08-17T00:15Z	1.994	false
2019-08-17T00:00Z	1.991	false
2019-08-16T23:45Z	1.991	false
2019-08-16T23:30Z	1.99	false
2019-08-16T23:15Z	1.988	false
2019-08-16T23:00Z	1.987	false
2019-08-16T22:45Z	1.984	false
2019-08-16T22:30Z	1.983	false
2019-08-16T22:15Z	1.981	false
2019-08-16T22:00Z	1.978	false
2019-08-16T21:45Z	1.976	false
2019-08-16T21:30Z	1.973	false
2019-08-16T21:15Z	1.969	false
2019-08-16T21:00Z	1.965	false
2019-08-16T20:45Z	1.961	false
2019-08-16T20:30Z	1.956	false
2019-08-16T20:15Z	1.954	false
2019-08-16T20:00Z	1.951	false
2019-08-16T19:45Z	1.95	false
2019-08-16T19:30Z	1.949	false
2019-08-16T19:15Z	1.945	false
2019-08-16T19:00Z	1.943	false
2019-08-16T18:45Z	1.938	false
2019-08-16T18:30Z	1.941	false
2019-08-16T18:15Z	1.934	false
2019-08-16T18:00Z	1.934	false
2019-08-16T17:45Z	1.933	false
2019-08-16T17:30Z	1.93	false
2019-08-16T17:15Z	1.928	false
2019-08-16T17:00Z	1.932	false
2019-08-16T16:45Z	1.929	false
2019-08-16T16:30Z	1.934	false
2019-08-16T16:15Z	1.932	false
2019-08-16T16:00Z	1.93	false
2019-08-16T15:45Z	1.937	false
2019-08-16T15:30Z	1.931	false
2019-08-16T15:15Z	1.927	false
2019-08-16T15:00Z	1.934	false
2019-08-16T14:45Z	1.917	false
2019-08-16T14:30Z	1.921	false
2019-08-16T14:15Z	1.913	false
2019-08-16T14:00Z	1.915	false
2019-08-16T13:45Z	1.906	false
2019-08-16T13:30Z	1.911	false
2019-08-16T13:15Z	1.908	false
2019-08-16T13:00Z	1.908	false
2019-08-16T12:45Z	1.908	false
2019-08-16T12:30Z	1.91	false
2019-08-16T12:15Z	1.91	false

Forecast data

Key information

• Station name: Sonning Lock (downstream)
• Station ID: 7132
• River name: River Thames
• Typical range: 2.00m to 3.18m
• Highest level on record: 3.96m on 04 January 2003
• Site datum: 31.61mAOD (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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