River level River Thames at Sonning Lock (downstream data)

Check for flood warnings in this area

Latest recorded level 2.56m at 2:00am Sunday 26 January 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
▼

• 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

You're missing out. A graph should be visible here.
Upgrade your browser to see and use all the features of this service.

You're missing out. A graph should be visible here.

Javascript must be enabled.

Observed data

DateTime	Value	Error
2020-01-26T02:00Z	2.562	false
2020-01-26T01:45Z	2.561	false
2020-01-26T01:30Z	2.566	false
2020-01-26T01:15Z	2.568	false
2020-01-26T01:00Z	2.567	false
2020-01-26T00:45Z	2.564	false
2020-01-26T00:30Z	2.567	false
2020-01-26T00:15Z	2.562	false
2020-01-26T00:00Z	2.565	false
2020-01-25T23:45Z	2.567	false
2020-01-25T23:30Z	2.566	false
2020-01-25T23:15Z	2.568	false
2020-01-25T23:00Z	2.564	false
2020-01-25T22:45Z	2.566	false
2020-01-25T22:30Z	2.563	false
2020-01-25T22:15Z	2.567	false
2020-01-25T22:00Z	2.565	false
2020-01-25T21:45Z	2.566	false
2020-01-25T21:30Z	2.566	false
2020-01-25T21:15Z	2.559	false
2020-01-25T21:00Z	2.567	false
2020-01-25T20:45Z	2.564	false
2020-01-25T20:30Z	2.559	false
2020-01-25T20:15Z	2.555	false
2020-01-25T20:00Z	2.554	false
2020-01-25T19:45Z	2.56	false
2020-01-25T19:30Z	2.556	false
2020-01-25T19:15Z	2.548	false
2020-01-25T19:00Z	2.551	false
2020-01-25T18:45Z	2.551	false
2020-01-25T18:30Z	2.549	false
2020-01-25T18:15Z	2.551	false
2020-01-25T18:00Z	2.549	false
2020-01-25T17:45Z	2.544	false
2020-01-25T17:30Z	2.543	false
2020-01-25T17:15Z	2.542	false
2020-01-25T17:00Z	2.538	false
2020-01-25T16:45Z	2.534	false
2020-01-25T16:30Z	2.531	false
2020-01-25T16:15Z	2.528	false
2020-01-25T16:00Z	2.522	false
2020-01-25T15:45Z	2.522	false
2020-01-25T15:30Z	2.523	false
2020-01-25T15:15Z	2.521	false
2020-01-25T15:00Z	2.513	false
2020-01-25T14:45Z	2.516	false
2020-01-25T14:30Z	2.536	false
2020-01-25T14:15Z	2.534	false
2020-01-25T14:00Z	2.537	false
2020-01-25T13:45Z	2.544	false
2020-01-25T13:30Z	2.547	false
2020-01-25T13:15Z	2.549	false
2020-01-25T13:00Z	2.552	false
2020-01-25T12:45Z	2.552	false
2020-01-25T12:30Z	2.548	false
2020-01-25T12:15Z	2.531	false
2020-01-25T12:00Z	2.584	false
2020-01-25T11:45Z	2.583	false
2020-01-25T11:30Z	2.581	false
2020-01-25T11:15Z	2.579	false
2020-01-25T11:00Z	2.581	false
2020-01-25T10:45Z	2.58	false
2020-01-25T10:30Z	2.585	false
2020-01-25T10:15Z	2.584	false
2020-01-25T10:00Z	2.58	false
2020-01-25T09:45Z	2.58	false
2020-01-25T09:30Z	2.585	false
2020-01-25T09:15Z	2.585	false
2020-01-25T09:00Z	2.584	false
2020-01-25T08:45Z	2.586	false
2020-01-25T08:30Z	2.589	false
2020-01-25T08:15Z	2.585	false
2020-01-25T08:00Z	2.587	false
2020-01-25T07:45Z	2.588	false
2020-01-25T07:30Z	2.589	false
2020-01-25T07:15Z	2.588	false
2020-01-25T07:00Z	2.589	false
2020-01-25T06:45Z	2.593	false
2020-01-25T06:30Z	2.594	false
2020-01-25T06:15Z	2.594	false
2020-01-25T06:00Z	2.597	false
2020-01-25T05:45Z	2.595	false
2020-01-25T05:30Z	2.596	false
2020-01-25T05:15Z	2.598	false
2020-01-25T05:00Z	2.6	false
2020-01-25T04:45Z	2.598	false
2020-01-25T04:30Z	2.6	false
2020-01-25T04:15Z	2.601	false
2020-01-25T04:00Z	2.6	false
2020-01-25T03:45Z	2.603	false
2020-01-25T03:30Z	2.6	false
2020-01-25T03:15Z	2.604	false
2020-01-25T03:00Z	2.605	false
2020-01-25T02:45Z	2.606	false
2020-01-25T02:30Z	2.604	false
2020-01-25T02:15Z	2.608	false
2020-01-25T02:00Z	2.607	false
2020-01-25T01:45Z	2.609	false
2020-01-25T01:30Z	2.61	false
2020-01-25T01:15Z	2.612	false
2020-01-25T01:00Z	2.616	false
2020-01-25T00:45Z	2.618	false
2020-01-25T00:30Z	2.619	false
2020-01-25T00:15Z	2.623	false
2020-01-25T00:00Z	2.618	false
2020-01-24T23:45Z	2.625	false
2020-01-24T23:30Z	2.625	false
2020-01-24T23:15Z	2.627	false
2020-01-24T23:00Z	2.627	false
2020-01-24T22:45Z	2.624	false
2020-01-24T22:30Z	2.629	false
2020-01-24T22:15Z	2.632	false
2020-01-24T22:00Z	2.632	false
2020-01-24T21:45Z	2.636	false
2020-01-24T21:30Z	2.636	false
2020-01-24T21:15Z	2.634	false
2020-01-24T21:00Z	2.634	false
2020-01-24T20:45Z	2.637	false
2020-01-24T20:30Z	2.64	false
2020-01-24T20:15Z	2.64	false
2020-01-24T20:00Z	2.638	false
2020-01-24T19:45Z	2.641	false
2020-01-24T19:30Z	2.64	false
2020-01-24T19:15Z	2.641	false
2020-01-24T19:00Z	2.641	false
2020-01-24T18:45Z	2.643	false
2020-01-24T18:30Z	2.64	false
2020-01-24T18:15Z	2.646	false
2020-01-24T18:00Z	2.648	false
2020-01-24T17:45Z	2.647	false
2020-01-24T17:30Z	2.648	false
2020-01-24T17:15Z	2.646	false
2020-01-24T17:00Z	2.648	false
2020-01-24T16:45Z	2.647	false
2020-01-24T16:30Z	2.643	false
2020-01-24T16:15Z	2.643	false
2020-01-24T16:00Z	2.642	false
2020-01-24T15:45Z	2.639	false
2020-01-24T15:30Z	2.632	false
2020-01-24T15:15Z	2.635	false
2020-01-24T15:00Z	2.635	false
2020-01-24T14:45Z	2.631	false
2020-01-24T14:30Z	2.632	false
2020-01-24T14:15Z	2.634	false
2020-01-24T14:00Z	2.636	false
2020-01-24T13:45Z	2.63	false
2020-01-24T13:30Z	2.629	false
2020-01-24T13:15Z	2.631	false
2020-01-24T13:00Z	2.63	false
2020-01-24T12:45Z	2.638	false
2020-01-24T12:30Z	2.65	false
2020-01-24T12:15Z	2.652	false
2020-01-24T12:00Z	2.654	false
2020-01-24T11:45Z	2.654	false
2020-01-24T11:30Z	2.656	false
2020-01-24T11:15Z	2.656	false
2020-01-24T11:00Z	2.654	false
2020-01-24T10:45Z	2.652	false
2020-01-24T10:30Z	2.657	false
2020-01-24T10:15Z	2.659	false
2020-01-24T10:00Z	2.657	false
2020-01-24T09:45Z	2.654	false
2020-01-24T09:30Z	2.658	false
2020-01-24T09:15Z	2.656	false
2020-01-24T09:00Z	2.659	false
2020-01-24T08:45Z	2.659	false
2020-01-24T08:30Z	2.656	false
2020-01-24T08:15Z	2.658	false
2020-01-24T08:00Z	2.662	false
2020-01-24T07:45Z	2.664	false
2020-01-24T07:30Z	2.663	false
2020-01-24T07:15Z	2.662	false
2020-01-24T07:00Z	2.664	false
2020-01-24T06:45Z	2.662	false
2020-01-24T06:30Z	2.663	false
2020-01-24T06:15Z	2.663	false
2020-01-24T06:00Z	2.667	false
2020-01-24T05:45Z	2.664	false
2020-01-24T05:30Z	2.665	false
2020-01-24T05:15Z	2.665	false
2020-01-24T05:00Z	2.667	false
2020-01-24T04:45Z	2.668	false
2020-01-24T04:30Z	2.669	false
2020-01-24T04:15Z	2.67	false
2020-01-24T04:00Z	2.672	false
2020-01-24T03:45Z	2.674	false
2020-01-24T03:30Z	2.671	false
2020-01-24T03:15Z	2.677	false
2020-01-24T03:00Z	2.676	false
2020-01-24T02:45Z	2.677	false
2020-01-24T02:30Z	2.679	false
2020-01-24T02:15Z	2.678	false
2020-01-24T02:00Z	2.681	false
2020-01-24T01:45Z	2.681	false
2020-01-24T01:30Z	2.681	false
2020-01-24T01:15Z	2.681	false
2020-01-24T01:00Z	2.685	false
2020-01-24T00:45Z	2.686	false
2020-01-24T00:30Z	2.687	false
2020-01-24T00:15Z	2.684	false
2020-01-24T00:00Z	2.687	false
2020-01-23T23:45Z	2.688	false
2020-01-23T23:30Z	2.687	false
2020-01-23T23:15Z	2.686	false
2020-01-23T23:00Z	2.691	false
2020-01-23T22:45Z	2.694	false
2020-01-23T22:30Z	2.693	false
2020-01-23T22:15Z	2.695	false
2020-01-23T22:00Z	2.695	false
2020-01-23T21:45Z	2.698	false
2020-01-23T21:30Z	2.7	false
2020-01-23T21:15Z	2.697	false
2020-01-23T21:00Z	2.703	false
2020-01-23T20:45Z	2.701	false
2020-01-23T20:30Z	2.703	false
2020-01-23T20:15Z	2.7	false
2020-01-23T20:00Z	2.708	false
2020-01-23T19:45Z	2.704	false
2020-01-23T19:30Z	2.706	false
2020-01-23T19:15Z	2.709	false
2020-01-23T19:00Z	2.707	false
2020-01-23T18:45Z	2.705	false
2020-01-23T18:30Z	2.708	false
2020-01-23T18:15Z	2.712	false
2020-01-23T18:00Z	2.713	false
2020-01-23T17:45Z	2.716	false
2020-01-23T17:30Z	2.717	false
2020-01-23T17:15Z	2.716	false
2020-01-23T17:00Z	2.723	false
2020-01-23T16:45Z	2.72	false
2020-01-23T16:30Z	2.721	false
2020-01-23T16:15Z	2.723	false
2020-01-23T16:00Z	2.723	false
2020-01-23T15:45Z	2.721	false
2020-01-23T15:30Z	2.726	false
2020-01-23T15:15Z	2.725	false
2020-01-23T15:00Z	2.724	false
2020-01-23T14:45Z	2.727	false
2020-01-23T14:30Z	2.728	false
2020-01-23T14:15Z	2.726	false
2020-01-23T14:00Z	2.725	false
2020-01-23T13:45Z	2.726	false
2020-01-23T13:30Z	2.722	false
2020-01-23T13:15Z	2.728	false
2020-01-23T13:00Z	2.725	false
2020-01-23T12:45Z	2.731	false
2020-01-23T12:30Z	2.737	false
2020-01-23T12:15Z	2.739	false
2020-01-23T12:00Z	2.764	false
2020-01-23T11:45Z	2.766	false
2020-01-23T11:30Z	2.771	false
2020-01-23T11:15Z	2.773	false
2020-01-23T11:00Z	2.775	false
2020-01-23T10:45Z	2.772	false
2020-01-23T10:30Z	2.773	false
2020-01-23T10:15Z	2.775	false
2020-01-23T10:00Z	2.774	false
2020-01-23T09:45Z	2.774	false
2020-01-23T09:30Z	2.775	false
2020-01-23T09:15Z	2.779	false
2020-01-23T09:00Z	2.779	false
2020-01-23T08:45Z	2.777	false
2020-01-23T08:30Z	2.782	false
2020-01-23T08:15Z	2.777	false
2020-01-23T08:00Z	2.784	false
2020-01-23T07:45Z	2.782	false
2020-01-23T07:30Z	2.786	false
2020-01-23T07:15Z	2.788	false
2020-01-23T07:00Z	2.788	false
2020-01-23T06:45Z	2.787	false
2020-01-23T06:30Z	2.789	false
2020-01-23T06:15Z	2.789	false
2020-01-23T06:00Z	2.788	false
2020-01-23T05:45Z	2.791	false
2020-01-23T05:30Z	2.792	false
2020-01-23T05:15Z	2.793	false
2020-01-23T05:00Z	2.793	false
2020-01-23T04:45Z	2.795	false
2020-01-23T04:30Z	2.798	false
2020-01-23T04:15Z	2.795	false
2020-01-23T04:00Z	2.796	false
2020-01-23T03:45Z	2.797	false
2020-01-23T03:30Z	2.8	false
2020-01-23T03:15Z	2.8	false
2020-01-23T03:00Z	2.802	false
2020-01-23T02:45Z	2.8	false
2020-01-23T02:30Z	2.801	false
2020-01-23T02:15Z	2.803	false
2020-01-23T02:00Z	2.802	false
2020-01-23T01:45Z	2.804	false
2020-01-23T01:30Z	2.804	false
2020-01-23T01:15Z	2.809	false
2020-01-23T01:00Z	2.809	false
2020-01-23T00:45Z	2.808	false
2020-01-23T00:30Z	2.808	false
2020-01-23T00:15Z	2.81	false
2020-01-23T00:00Z	2.812	false
2020-01-22T23:45Z	2.816	false
2020-01-22T23:30Z	2.818	false
2020-01-22T23:15Z	2.817	false
2020-01-22T23:00Z	2.82	false
2020-01-22T22:45Z	2.82	false
2020-01-22T22:30Z	2.822	false
2020-01-22T22:15Z	2.824	false
2020-01-22T22:00Z	2.824	false
2020-01-22T21:45Z	2.825	false
2020-01-22T21:30Z	2.831	false
2020-01-22T21:15Z	2.834	false
2020-01-22T21:00Z	2.836	false
2020-01-22T20:45Z	2.839	false
2020-01-22T20:30Z	2.84	false
2020-01-22T20:15Z	2.836	false
2020-01-22T20:00Z	2.847	false
2020-01-22T19:45Z	2.844	false
2020-01-22T19:30Z	2.847	false
2020-01-22T19:15Z	2.847	false
2020-01-22T19:00Z	2.849	false
2020-01-22T18:45Z	2.854	false
2020-01-22T18:30Z	2.858	false
2020-01-22T18:15Z	2.855	false
2020-01-22T18:00Z	2.86	false
2020-01-22T17:45Z	2.862	false
2020-01-22T17:30Z	2.863	false
2020-01-22T17:15Z	2.861	false
2020-01-22T17:00Z	2.863	false
2020-01-22T16:45Z	2.863	false
2020-01-22T16:30Z	2.864	false
2020-01-22T16:15Z	2.865	false
2020-01-22T16:00Z	2.86	false
2020-01-22T15:45Z	2.865	false
2020-01-22T15:30Z	2.865	false
2020-01-22T15:15Z	2.865	false
2020-01-22T15:00Z	2.864	false
2020-01-22T14:45Z	2.867	false
2020-01-22T14:30Z	2.869	false
2020-01-22T14:15Z	2.865	false
2020-01-22T14:00Z	2.863	false
2020-01-22T13:45Z	2.863	false
2020-01-22T13:30Z	2.857	false
2020-01-22T13:15Z	2.798	false
2020-01-22T13:00Z	2.876	false
2020-01-22T12:45Z	2.889	false
2020-01-22T12:30Z	2.901	false
2020-01-22T12:15Z	2.918	false
2020-01-22T12:00Z	2.946	false
2020-01-22T11:45Z	2.971	false
2020-01-22T11:30Z	2.974	false
2020-01-22T11:15Z	2.976	false
2020-01-22T11:00Z	2.976	false
2020-01-22T10:45Z	2.976	false
2020-01-22T10:30Z	2.979	false
2020-01-22T10:15Z	2.979	false
2020-01-22T10:00Z	2.983	false
2020-01-22T09:45Z	2.984	false
2020-01-22T09:30Z	2.985	false
2020-01-22T09:15Z	2.983	false
2020-01-22T09:00Z	2.985	false
2020-01-22T08:45Z	2.988	false
2020-01-22T08:30Z	2.99	false
2020-01-22T08:15Z	2.992	false
2020-01-22T08:00Z	2.99	false
2020-01-22T07:45Z	2.994	false
2020-01-22T07:30Z	2.996	false
2020-01-22T07:15Z	2.997	false
2020-01-22T07:00Z	2.995	false
2020-01-22T06:45Z	2.997	false
2020-01-22T06:30Z	3.002	false
2020-01-22T06:15Z	3.003	false
2020-01-22T06:00Z	3.006	false
2020-01-22T05:45Z	3.005	false
2020-01-22T05:30Z	3.006	false
2020-01-22T05:15Z	3.01	false
2020-01-22T05:00Z	3.013	false
2020-01-22T04:45Z	3.011	false
2020-01-22T04:30Z	3.013	false
2020-01-22T04:15Z	3.019	false
2020-01-22T04:00Z	3.016	false
2020-01-22T03:45Z	3.018	false
2020-01-22T03:30Z	3.023	false
2020-01-22T03:15Z	3.021	false
2020-01-22T03:00Z	3.024	false
2020-01-22T02:45Z	3.024	false
2020-01-22T02:30Z	3.029	false
2020-01-22T02:15Z	3.024	false
2020-01-22T02:00Z	3.032	false
2020-01-22T01:45Z	3.03	false
2020-01-22T01:30Z	3.03	false
2020-01-22T01:15Z	3.037	false
2020-01-22T01:00Z	3.034	false
2020-01-22T00:45Z	3.04	false
2020-01-22T00:30Z	3.045	false
2020-01-22T00:15Z	3.044	false
2020-01-22T00:00Z	3.047	false
2020-01-21T23:45Z	3.046	false
2020-01-21T23:30Z	3.046	false
2020-01-21T23:15Z	3.051	false
2020-01-21T23:00Z	3.053	false
2020-01-21T22:45Z	3.052	false
2020-01-21T22:30Z	3.057	false
2020-01-21T22:15Z	3.056	false
2020-01-21T22:00Z	3.057	false
2020-01-21T21:45Z	3.061	false
2020-01-21T21:30Z	3.061	false
2020-01-21T21:15Z	3.062	false
2020-01-21T21:00Z	3.063	false
2020-01-21T20:45Z	3.065	false
2020-01-21T20:30Z	3.071	false
2020-01-21T20:15Z	3.072	false
2020-01-21T20:00Z	3.071	false
2020-01-21T19:45Z	3.072	false
2020-01-21T19:30Z	3.075	false
2020-01-21T19:15Z	3.074	false
2020-01-21T19:00Z	3.073	false
2020-01-21T18:45Z	3.081	false
2020-01-21T18:30Z	3.08	false
2020-01-21T18:15Z	3.083	false
2020-01-21T18:00Z	3.087	false
2020-01-21T17:45Z	3.084	false
2020-01-21T17:30Z	3.086	false
2020-01-21T17:15Z	3.085	false
2020-01-21T17:00Z	3.091	false
2020-01-21T16:45Z	3.088	false
2020-01-21T16:30Z	3.091	false
2020-01-21T16:15Z	3.092	false
2020-01-21T16:00Z	3.098	false
2020-01-21T15:45Z	3.095	false
2020-01-21T15:30Z	3.099	false
2020-01-21T15:15Z	3.098	false
2020-01-21T15:00Z	3.095	false
2020-01-21T14:45Z	3.097	false
2020-01-21T14:30Z	3.1	false
2020-01-21T14:15Z	3.099	false
2020-01-21T14:00Z	3.1	false
2020-01-21T13:45Z	3.102	false
2020-01-21T13:30Z	3.1	false
2020-01-21T13:15Z	3.104	false
2020-01-21T13:00Z	3.107	false
2020-01-21T12:45Z	3.107	false
2020-01-21T12:30Z	3.111	false
2020-01-21T12:15Z	3.112	false
2020-01-21T12:00Z	3.115	false
2020-01-21T11:45Z	3.115	false
2020-01-21T11:30Z	3.117	false
2020-01-21T11:15Z	3.12	false
2020-01-21T11:00Z	3.123	false
2020-01-21T10:45Z	3.126	false
2020-01-21T10:30Z	3.136	false
2020-01-21T10:15Z	3.137	false
2020-01-21T10:00Z	3.14	false
2020-01-21T09:45Z	3.137	false
2020-01-21T09:30Z	3.146	false
2020-01-21T09:15Z	3.145	false
2020-01-21T09:00Z	3.145	false
2020-01-21T08:45Z	3.15	false
2020-01-21T08:30Z	3.149	false
2020-01-21T08:15Z	3.153	false
2020-01-21T08:00Z	3.154	false
2020-01-21T07:45Z	3.158	false
2020-01-21T07:30Z	3.158	false
2020-01-21T07:15Z	3.159	false
2020-01-21T07:00Z	3.16	false
2020-01-21T06:45Z	3.162	false
2020-01-21T06:30Z	3.164	false
2020-01-21T06:15Z	3.165	false
2020-01-21T06:00Z	3.166	false
2020-01-21T05:45Z	3.168	false
2020-01-21T05:30Z	3.171	false
2020-01-21T05:15Z	3.172	false
2020-01-21T05:00Z	3.173	false
2020-01-21T04:45Z	3.172	false
2020-01-21T04:30Z	3.179	false
2020-01-21T04:15Z	3.177	false
2020-01-21T04:00Z	3.18	false
2020-01-21T04:00Z	3.18	false
2020-01-21T03:45Z	3.181	false
2020-01-21T03:45Z	3.181	false
2020-01-21T03:30Z	3.182	false
2020-01-21T03:30Z	3.182	false
2020-01-21T03:15Z	3.183	false
2020-01-21T03:15Z	3.183	false
2020-01-21T03:00Z	3.187	false
2020-01-21T02:45Z	3.188	false
2020-01-21T02:30Z	3.188	false
2020-01-21T02:15Z	3.193	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

Share this page

• Twitter
• Facebook
• Email