River level River Thames at Sunbury Lock (downstream data)

Flooding is possible - Be prepared

The latest information indicates flooding is possible - Take action.

Check for flood warnings in this area

Latest recorded level 3.42m at 8:00pm Saturday 18 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
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• Measured level
• When the water level reaches 3.34m 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
2020-01-18T20:00Z	3.421	false
2020-01-18T19:45Z	3.417	false
2020-01-18T19:30Z	3.423	false
2020-01-18T19:15Z	3.427	false
2020-01-18T19:00Z	3.424	false
2020-01-18T18:45Z	3.421	false
2020-01-18T18:30Z	3.419	false
2020-01-18T18:15Z	3.405	false
2020-01-18T18:00Z	3.406	false
2020-01-18T17:45Z	3.416	false
2020-01-18T17:30Z	3.411	false
2020-01-18T17:15Z	3.412	false
2020-01-18T17:00Z	3.416	false
2020-01-18T16:45Z	3.411	false
2020-01-18T16:30Z	3.413	false
2020-01-18T16:15Z	3.416	false
2020-01-18T16:00Z	3.415	false
2020-01-18T15:45Z	3.419	false
2020-01-18T15:30Z	3.421	false
2020-01-18T15:15Z	3.418	false
2020-01-18T15:00Z	3.42	false
2020-01-18T14:45Z	3.422	false
2020-01-18T14:30Z	3.414	false
2020-01-18T14:15Z	3.419	false
2020-01-18T14:00Z	3.421	false
2020-01-18T13:45Z	3.416	false
2020-01-18T13:30Z	3.419	false
2020-01-18T13:15Z	3.421	false
2020-01-18T13:00Z	3.419	false
2020-01-18T12:45Z	3.422	false
2020-01-18T12:30Z	3.427	false
2020-01-18T12:15Z	3.416	false
2020-01-18T12:00Z	3.425	false
2020-01-18T11:45Z	3.429	false
2020-01-18T11:30Z	3.426	false
2020-01-18T11:15Z	3.425	false
2020-01-18T11:00Z	3.435	false
2020-01-18T10:45Z	3.431	false
2020-01-18T10:30Z	3.431	false
2020-01-18T10:15Z	3.439	false
2020-01-18T10:00Z	3.436	false
2020-01-18T09:45Z	3.44	false
2020-01-18T09:30Z	3.444	false
2020-01-18T09:15Z	3.445	false
2020-01-18T09:00Z	3.448	false
2020-01-18T08:45Z	3.45	false
2020-01-18T08:30Z	3.445	false
2020-01-18T08:15Z	3.445	false
2020-01-18T08:00Z	3.445	false
2020-01-18T07:45Z	3.439	false
2020-01-18T07:30Z	3.435	false
2020-01-18T07:15Z	3.436	false
2020-01-18T07:00Z	3.427	false
2020-01-18T06:45Z	3.434	false
2020-01-18T06:30Z	3.435	false
2020-01-18T06:15Z	3.425	false
2020-01-18T06:00Z	3.429	false
2020-01-18T05:45Z	3.429	false
2020-01-18T05:30Z	3.428	false
2020-01-18T05:15Z	3.432	false
2020-01-18T05:00Z	3.435	false
2020-01-18T04:45Z	3.434	false
2020-01-18T04:30Z	3.433	false
2020-01-18T04:15Z	3.436	false
2020-01-18T04:00Z	3.433	false
2020-01-18T03:45Z	3.441	false
2020-01-18T03:30Z	3.445	false
2020-01-18T03:15Z	3.438	false
2020-01-18T03:00Z	3.44	false
2020-01-18T02:45Z	3.446	false
2020-01-18T02:30Z	3.444	false
2020-01-18T02:15Z	3.455	false
2020-01-18T02:00Z	3.457	false
2020-01-18T01:45Z	3.455	false
2020-01-18T01:30Z	3.463	false
2020-01-18T01:15Z	3.466	false
2020-01-18T01:00Z	3.461	false
2020-01-18T00:45Z	3.461	false
2020-01-18T00:30Z	3.468	false
2020-01-18T00:15Z	3.472	false
2020-01-18T00:00Z	3.47	false
2020-01-17T23:45Z	3.479	false
2020-01-17T23:30Z	3.483	false
2020-01-17T23:15Z	3.478	false
2020-01-17T23:00Z	3.485	false
2020-01-17T22:45Z	3.489	false
2020-01-17T22:30Z	3.489	false
2020-01-17T22:15Z	3.493	false
2020-01-17T22:00Z	3.501	false
2020-01-17T21:45Z	3.496	false
2020-01-17T21:30Z	3.492	false
2020-01-17T21:15Z	3.5	false
2020-01-17T21:00Z	3.496	false
2020-01-17T20:45Z	3.487	false
2020-01-17T20:30Z	3.48	false
2020-01-17T20:15Z	3.472	false
2020-01-17T20:00Z	3.462	false
2020-01-17T19:45Z	3.453	false
2020-01-17T19:30Z	3.458	false
2020-01-17T19:15Z	3.445	false
2020-01-17T19:00Z	3.45	false
2020-01-17T18:45Z	3.448	false
2020-01-17T18:30Z	3.442	false
2020-01-17T18:15Z	3.446	false
2020-01-17T18:00Z	3.439	false
2020-01-17T17:45Z	3.438	false
2020-01-17T17:30Z	3.442	false
2020-01-17T17:15Z	3.438	false
2020-01-17T17:00Z	3.433	false
2020-01-17T16:45Z	3.435	false
2020-01-17T16:30Z	3.441	false
2020-01-17T16:15Z	3.438	false
2020-01-17T16:00Z	3.448	false
2020-01-17T15:45Z	3.453	false
2020-01-17T15:30Z	3.46	false
2020-01-17T15:15Z	3.461	false
2020-01-17T15:00Z	3.46	false
2020-01-17T14:45Z	3.449	false
2020-01-17T14:30Z	3.431	false
2020-01-17T14:15Z	3.437	false
2020-01-17T14:00Z	3.443	false
2020-01-17T13:45Z	3.438	false
2020-01-17T13:30Z	3.432	false
2020-01-17T13:15Z	3.435	false
2020-01-17T13:00Z	3.424	false
2020-01-17T12:45Z	3.419	false
2020-01-17T12:30Z	3.419	false
2020-01-17T12:15Z	3.408	false
2020-01-17T12:00Z	3.4	false
2020-01-17T11:45Z	3.396	false
2020-01-17T11:30Z	3.394	false
2020-01-17T11:15Z	3.396	false
2020-01-17T11:00Z	3.397	false
2020-01-17T10:45Z	3.399	false
2020-01-17T10:30Z	3.394	false
2020-01-17T10:15Z	3.392	false
2020-01-17T10:00Z	3.383	false
2020-01-17T09:45Z	3.389	false
2020-01-17T09:30Z	3.386	false
2020-01-17T09:15Z	3.383	false
2020-01-17T09:00Z	3.384	false
2020-01-17T08:45Z	3.379	false
2020-01-17T08:30Z	3.371	false
2020-01-17T08:15Z	3.357	false
2020-01-17T08:00Z	3.351	false
2020-01-17T07:45Z	3.35	false
2020-01-17T07:30Z	3.345	false
2020-01-17T07:15Z	3.339	false
2020-01-17T07:00Z	3.341	false
2020-01-17T06:45Z	3.336	false
2020-01-17T06:30Z	3.336	false
2020-01-17T06:15Z	3.331	false
2020-01-17T06:00Z	3.33	false
2020-01-17T05:45Z	3.328	false
2020-01-17T05:30Z	3.33	false
2020-01-17T05:15Z	3.328	false
2020-01-17T05:00Z	3.328	false
2020-01-17T04:45Z	3.326	false
2020-01-17T04:30Z	3.327	false
2020-01-17T04:15Z	3.324	false
2020-01-17T04:00Z	3.323	false
2020-01-17T03:45Z	3.32	false
2020-01-17T03:30Z	3.324	false
2020-01-17T03:15Z	3.323	false
2020-01-17T03:00Z	3.324	false
2020-01-17T02:45Z	3.326	false
2020-01-17T02:30Z	3.323	false
2020-01-17T02:15Z	3.325	false
2020-01-17T02:00Z	3.328	false
2020-01-17T01:45Z	3.325	false
2020-01-17T01:30Z	3.325	false
2020-01-17T01:15Z	3.325	false
2020-01-17T01:00Z	3.328	false
2020-01-17T00:45Z	3.332	false
2020-01-17T00:30Z	3.325	false
2020-01-17T00:15Z	3.331	false
2020-01-17T00:00Z	3.327	false
2020-01-16T23:45Z	3.33	false
2020-01-16T23:30Z	3.33	false
2020-01-16T23:15Z	3.332	false
2020-01-16T23:00Z	3.331	false
2020-01-16T22:45Z	3.332	false
2020-01-16T22:30Z	3.334	false
2020-01-16T22:15Z	3.335	false
2020-01-16T22:00Z	3.341	false
2020-01-16T21:45Z	3.34	false
2020-01-16T21:30Z	3.339	false
2020-01-16T21:15Z	3.347	false
2020-01-16T21:00Z	3.343	false
2020-01-16T20:45Z	3.348	false
2020-01-16T20:30Z	3.346	false
2020-01-16T20:15Z	3.347	false
2020-01-16T20:00Z	3.344	false
2020-01-16T19:45Z	3.334	false
2020-01-16T19:30Z	3.33	false
2020-01-16T19:15Z	3.334	false
2020-01-16T19:00Z	3.327	false
2020-01-16T18:45Z	3.322	false
2020-01-16T18:30Z	3.32	false
2020-01-16T18:15Z	3.321	false
2020-01-16T18:00Z	3.316	false
2020-01-16T17:45Z	3.312	false
2020-01-16T17:30Z	3.316	false
2020-01-16T17:15Z	3.307	false
2020-01-16T17:00Z	3.305	false
2020-01-16T16:45Z	3.31	false
2020-01-16T16:30Z	3.316	false
2020-01-16T16:15Z	3.315	false
2020-01-16T16:00Z	3.309	false
2020-01-16T15:45Z	3.297	false
2020-01-16T15:30Z	3.299	false
2020-01-16T15:15Z	3.308	false
2020-01-16T15:00Z	3.307	false
2020-01-16T14:45Z	3.309	false
2020-01-16T14:30Z	3.316	false
2020-01-16T14:15Z	3.329	false
2020-01-16T14:00Z	3.339	false
2020-01-16T13:45Z	3.354	false
2020-01-16T13:30Z	3.368	false
2020-01-16T13:15Z	3.371	false
2020-01-16T13:00Z	3.376	false
2020-01-16T12:45Z	3.389	false
2020-01-16T12:30Z	3.384	false
2020-01-16T12:15Z	3.378	false
2020-01-16T12:00Z	3.377	false
2020-01-16T11:45Z	3.372	false
2020-01-16T11:30Z	3.318	false
2020-01-16T11:15Z	3.313	false
2020-01-16T11:00Z	3.311	false
2020-01-16T10:45Z	3.321	false
2020-01-16T10:30Z	3.317	false
2020-01-16T10:15Z	3.326	false
2020-01-16T10:00Z	3.342	false
2020-01-16T09:45Z	3.334	false
2020-01-16T09:30Z	3.334	false
2020-01-16T09:15Z	3.332	false
2020-01-16T09:00Z	3.332	false
2020-01-16T08:45Z	3.336	false
2020-01-16T08:30Z	3.336	false
2020-01-16T08:15Z	3.337	false
2020-01-16T08:00Z	3.336	false
2020-01-16T07:45Z	3.339	false
2020-01-16T07:30Z	3.337	false
2020-01-16T07:15Z	3.33	false
2020-01-16T07:00Z	3.328	false
2020-01-16T06:45Z	3.325	false
2020-01-16T06:30Z	3.322	false
2020-01-16T06:15Z	3.319	false
2020-01-16T06:00Z	3.316	false
2020-01-16T05:45Z	3.314	false
2020-01-16T05:30Z	3.315	false
2020-01-16T05:15Z	3.313	false
2020-01-16T05:00Z	3.311	false
2020-01-16T04:45Z	3.314	false
2020-01-16T04:30Z	3.307	false
2020-01-16T04:15Z	3.311	false
2020-01-16T04:00Z	3.31	false
2020-01-16T03:45Z	3.307	false
2020-01-16T03:30Z	3.304	false
2020-01-16T03:15Z	3.304	false
2020-01-16T03:00Z	3.302	false
2020-01-16T02:45Z	3.305	false
2020-01-16T02:30Z	3.303	false
2020-01-16T02:15Z	3.303	false
2020-01-16T02:00Z	3.302	false
2020-01-16T01:45Z	3.299	false
2020-01-16T01:30Z	3.303	false
2020-01-16T01:15Z	3.303	false
2020-01-16T01:00Z	3.294	false
2020-01-16T00:45Z	3.291	false
2020-01-16T00:30Z	3.294	false
2020-01-16T00:15Z	3.29	false
2020-01-16T00:00Z	3.289	false
2020-01-15T23:45Z	3.292	false
2020-01-15T23:30Z	3.293	false
2020-01-15T23:15Z	3.295	false
2020-01-15T23:00Z	3.297	false
2020-01-15T22:45Z	3.306	false
2020-01-15T22:30Z	3.306	false
2020-01-15T22:15Z	3.302	false
2020-01-15T22:00Z	3.291	false
2020-01-15T21:45Z	3.273	false
2020-01-15T21:30Z	3.267	false
2020-01-15T21:15Z	3.263	false
2020-01-15T21:00Z	3.258	false
2020-01-15T20:45Z	3.257	false
2020-01-15T20:30Z	3.255	false
2020-01-15T20:15Z	3.253	false
2020-01-15T20:00Z	3.251	false
2020-01-15T19:45Z	3.253	false
2020-01-15T19:30Z	3.247	false
2020-01-15T19:15Z	3.241	false
2020-01-15T19:00Z	3.232	false
2020-01-15T18:45Z	3.229	false
2020-01-15T18:30Z	3.22	false
2020-01-15T18:15Z	3.217	false
2020-01-15T18:00Z	3.208	false
2020-01-15T17:45Z	3.205	false
2020-01-15T17:30Z	3.201	false
2020-01-15T17:15Z	3.202	false
2020-01-15T17:00Z	3.203	false
2020-01-15T16:45Z	3.204	false
2020-01-15T16:30Z	3.213	false
2020-01-15T16:15Z	3.229	false
2020-01-15T16:00Z	3.23	false
2020-01-15T15:45Z	3.231	false
2020-01-15T15:30Z	3.228	false
2020-01-15T15:15Z	3.213	false
2020-01-15T15:00Z	3.203	false
2020-01-15T14:45Z	3.184	false
2020-01-15T14:30Z	3.158	false
2020-01-15T14:15Z	3.152	false
2020-01-15T14:00Z	3.148	false
2020-01-15T13:45Z	3.141	false
2020-01-15T13:30Z	3.145	false
2020-01-15T13:15Z	3.154	false
2020-01-15T13:00Z	3.151	false
2020-01-15T12:45Z	3.143	false
2020-01-15T12:30Z	3.148	false
2020-01-15T12:15Z	3.147	false
2020-01-15T12:00Z	3.149	false
2020-01-15T11:45Z	3.144	false
2020-01-15T11:30Z	3.147	false
2020-01-15T11:15Z	3.153	false
2020-01-15T11:00Z	3.161	false
2020-01-15T10:45Z	3.158	false
2020-01-15T10:30Z	3.171	false
2020-01-15T10:15Z	3.185	false
2020-01-15T10:00Z	3.191	false
2020-01-15T09:45Z	3.192	false
2020-01-15T09:30Z	3.185	false
2020-01-15T09:15Z	3.184	false
2020-01-15T09:00Z	3.131	false
2020-01-15T08:45Z	3.138	false
2020-01-15T08:30Z	3.154	false
2020-01-15T08:15Z	3.186	false
2020-01-15T08:00Z	3.185	false
2020-01-15T07:45Z	3.181	false
2020-01-15T07:30Z	3.18	false
2020-01-15T07:15Z	3.178	false
2020-01-15T07:00Z	3.177	false
2020-01-15T06:45Z	3.171	false
2020-01-15T06:30Z	3.168	false
2020-01-15T06:15Z	3.17	false
2020-01-15T06:00Z	3.161	false
2020-01-15T05:45Z	3.151	false
2020-01-15T05:30Z	3.15	false
2020-01-15T05:15Z	3.148	false
2020-01-15T05:00Z	3.144	false
2020-01-15T04:45Z	3.143	false
2020-01-15T04:30Z	3.138	false
2020-01-15T04:15Z	3.129	false
2020-01-15T04:00Z	3.124	false
2020-01-15T03:45Z	3.115	false
2020-01-15T03:30Z	3.107	false
2020-01-15T03:15Z	3.099	false
2020-01-15T03:00Z	3.098	false
2020-01-15T02:45Z	3.09	false
2020-01-15T02:30Z	3.078	false
2020-01-15T02:15Z	3.075	false
2020-01-15T02:00Z	3.057	false
2020-01-15T01:45Z	3.053	false
2020-01-15T01:30Z	3.041	false
2020-01-15T01:15Z	3.044	false
2020-01-15T01:00Z	3.04	false
2020-01-15T00:45Z	3.038	false
2020-01-15T00:30Z	3.031	false
2020-01-15T00:15Z	3.036	false
2020-01-15T00:00Z	3.034	false
2020-01-14T23:45Z	3.024	false
2020-01-14T23:30Z	3.029	false
2020-01-14T23:15Z	3.018	false
2020-01-14T23:00Z	3.023	false
2020-01-14T22:45Z	3.019	false
2020-01-14T22:30Z	3.016	false
2020-01-14T22:15Z	3.022	false
2020-01-14T22:00Z	3.026	false
2020-01-14T21:45Z	3.015	false
2020-01-14T21:30Z	3.018	false
2020-01-14T21:15Z	3.018	false
2020-01-14T21:00Z	3.02	false
2020-01-14T20:45Z	3.017	false
2020-01-14T20:30Z	3.012	false
2020-01-14T20:15Z	3.016	false
2020-01-14T20:00Z	3.016	false
2020-01-14T19:45Z	3.014	false
2020-01-14T19:30Z	3.022	false
2020-01-14T19:15Z	3.006	false
2020-01-14T19:00Z	3.023	false
2020-01-14T18:45Z	3.025	false
2020-01-14T18:30Z	3.014	false
2020-01-14T18:15Z	3.019	false
2020-01-14T18:00Z	3.019	false
2020-01-14T17:45Z	2.995	false
2020-01-14T17:30Z	2.988	false
2020-01-14T17:15Z	2.986	false
2020-01-14T17:00Z	2.974	false
2020-01-14T16:45Z	2.962	false
2020-01-14T16:30Z	2.952	false
2020-01-14T16:15Z	2.935	false
2020-01-14T16:00Z	2.917	false
2020-01-14T15:45Z	2.874	false
2020-01-14T15:30Z	2.863	false
2020-01-14T15:15Z	2.861	false
2020-01-14T15:00Z	2.862	false
2020-01-14T14:45Z	2.853	false
2020-01-14T14:30Z	2.841	false
2020-01-14T14:15Z	2.854	false
2020-01-14T14:00Z	2.851	false
2020-01-14T13:45Z	2.845	false
2020-01-14T13:30Z	2.848	false
2020-01-14T13:15Z	2.842	false
2020-01-14T13:00Z	2.842	false
2020-01-14T12:45Z	2.845	false
2020-01-14T12:30Z	2.841	false
2020-01-14T12:15Z	2.844	false
2020-01-14T12:00Z	2.842	false
2020-01-14T11:45Z	2.839	false
2020-01-14T11:30Z	2.838	false
2020-01-14T11:15Z	2.84	false
2020-01-14T11:00Z	2.838	false
2020-01-14T10:45Z	2.836	false
2020-01-14T10:30Z	2.833	false
2020-01-14T10:15Z	2.831	false
2020-01-14T10:00Z	2.83	false
2020-01-14T09:45Z	2.828	false
2020-01-14T09:30Z	2.824	false
2020-01-14T09:15Z	2.823	false
2020-01-14T09:00Z	2.822	false
2020-01-14T08:45Z	2.819	false
2020-01-14T08:30Z	2.816	false
2020-01-14T08:15Z	2.813	false
2020-01-14T08:00Z	2.81	false
2020-01-14T07:45Z	2.808	false
2020-01-14T07:30Z	2.807	false
2020-01-14T07:15Z	2.805	false
2020-01-14T07:00Z	2.804	false
2020-01-14T06:45Z	2.804	false
2020-01-14T06:30Z	2.794	false
2020-01-14T06:15Z	2.791	false
2020-01-14T06:00Z	2.789	false
2020-01-14T05:45Z	2.784	false
2020-01-14T05:30Z	2.782	false
2020-01-14T05:15Z	2.78	false
2020-01-14T05:00Z	2.778	false
2020-01-14T04:45Z	2.778	false
2020-01-14T04:30Z	2.778	false
2020-01-14T04:15Z	2.778	false
2020-01-14T04:00Z	2.779	false
2020-01-14T03:45Z	2.775	false
2020-01-14T03:30Z	2.775	false
2020-01-14T03:15Z	2.776	false
2020-01-14T03:00Z	2.778	false
2020-01-14T02:45Z	2.777	false
2020-01-14T02:30Z	2.777	false
2020-01-14T02:15Z	2.777	false
2020-01-14T02:00Z	2.774	false
2020-01-14T01:45Z	2.778	false
2020-01-14T01:30Z	2.774	false
2020-01-14T01:15Z	2.778	false
2020-01-14T01:00Z	2.778	false
2020-01-14T00:45Z	2.784	false
2020-01-14T00:30Z	2.785	false
2020-01-14T00:15Z	2.786	false
2020-01-14T00:00Z	2.788	false
2020-01-13T23:45Z	2.797	false
2020-01-13T23:30Z	2.799	false
2020-01-13T23:15Z	2.803	false
2020-01-13T23:00Z	2.802	false
2020-01-13T22:45Z	2.808	false
2020-01-13T22:30Z	2.81	false
2020-01-13T22:15Z	2.815	false
2020-01-13T22:00Z	2.824	false
2020-01-13T21:45Z	2.825	false
2020-01-13T21:30Z	2.831	false
2020-01-13T21:15Z	2.833	false
2020-01-13T21:00Z	2.851	false
2020-01-13T20:45Z	2.856	false
2020-01-13T20:30Z	2.855	false
2020-01-13T20:15Z	2.871	false

Forecast data

Key information

• Station name: Sunbury Lock (downstream)
• Station ID: 7245
• River name: River Thames
• Typical range: 2.29m to 3.34m
• Highest level on record: 5.05m on 11 February 2014
• Site datum: 3.94mAOD (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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