River level River Thames at Sonning Lock (downstream data)

Check for flood warnings in this area

Latest recorded level 2.06m at 10:00pm Monday 2 August 2021.

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
2021-08-02T21:00Z	2.058	false
2021-08-02T20:45Z	2.059	false
2021-08-02T20:30Z	2.067	false
2021-08-02T20:15Z	2.079	false
2021-08-02T20:00Z	2.085	false
2021-08-02T19:45Z	2.112	false
2021-08-02T19:30Z	2.112	false
2021-08-02T19:15Z	2.11	false
2021-08-02T19:00Z	2.11	false
2021-08-02T18:45Z	2.11	false
2021-08-02T18:30Z	2.109	false
2021-08-02T18:15Z	2.107	false
2021-08-02T18:00Z	2.11	false
2021-08-02T17:45Z	2.11	false
2021-08-02T17:30Z	2.11	false
2021-08-02T17:15Z	2.111	false
2021-08-02T17:00Z	2.114	false
2021-08-02T16:45Z	2.111	false
2021-08-02T16:30Z	2.11	false
2021-08-02T16:15Z	2.112	false
2021-08-02T16:00Z	2.121	false
2021-08-02T15:45Z	2.124	false
2021-08-02T15:30Z	2.125	false
2021-08-02T15:15Z	2.12	false
2021-08-02T15:00Z	2.118	false
2021-08-02T14:45Z	2.119	false
2021-08-02T14:30Z	2.125	false
2021-08-02T14:15Z	2.123	false
2021-08-02T14:00Z	2.12	false
2021-08-02T13:45Z	2.117	false
2021-08-02T13:30Z	2.126	false
2021-08-02T13:15Z	2.118	false
2021-08-02T13:00Z	2.119	false
2021-08-02T12:45Z	2.116	false
2021-08-02T12:30Z	2.118	false
2021-08-02T12:15Z	2.116	false
2021-08-02T12:00Z	2.116	false
2021-08-02T11:45Z	2.116	false
2021-08-02T11:30Z	2.114	false
2021-08-02T11:15Z	2.112	false
2021-08-02T11:00Z	2.111	false
2021-08-02T10:45Z	2.108	false
2021-08-02T10:30Z	2.11	false
2021-08-02T10:15Z	2.105	false
2021-08-02T10:00Z	2.109	false
2021-08-02T09:45Z	2.114	false
2021-08-02T09:30Z	2.107	false
2021-08-02T09:15Z	2.105	false
2021-08-02T09:00Z	2.105	false
2021-08-02T08:45Z	2.109	false
2021-08-02T08:30Z	2.108	false
2021-08-02T08:15Z	2.105	false
2021-08-02T08:00Z	2.106	false
2021-08-02T07:45Z	2.106	false
2021-08-02T07:30Z	2.103	false
2021-08-02T07:15Z	2.113	false
2021-08-02T07:00Z	2.104	false
2021-08-02T06:45Z	2.104	false
2021-08-02T06:30Z	2.102	false
2021-08-02T06:15Z	2.103	false
2021-08-02T06:00Z	2.102	false
2021-08-02T05:45Z	2.102	false
2021-08-02T05:30Z	2.103	false
2021-08-02T05:15Z	2.103	false
2021-08-02T05:00Z	2.102	false
2021-08-02T04:45Z	2.102	false
2021-08-02T04:30Z	2.103	false
2021-08-02T04:15Z	2.102	false
2021-08-02T04:00Z	2.102	false
2021-08-02T03:45Z	2.102	false
2021-08-02T03:30Z	2.101	false
2021-08-02T03:15Z	2.101	false
2021-08-02T03:00Z	2.101	false
2021-08-02T02:45Z	2.101	false
2021-08-02T02:30Z	2.101	false
2021-08-02T02:15Z	2.1	false
2021-08-02T02:00Z	2.101	false
2021-08-02T01:45Z	2.1	false
2021-08-02T01:30Z	2.1	false
2021-08-02T01:15Z	2.1	false
2021-08-02T01:00Z	2.1	false
2021-08-02T00:45Z	2.1	false
2021-08-02T00:30Z	2.099	false
2021-08-02T00:15Z	2.1	false
2021-08-02T00:00Z	2.099	false
2021-08-01T23:45Z	2.099	false
2021-08-01T23:30Z	2.099	false
2021-08-01T23:15Z	2.098	false
2021-08-01T23:00Z	2.098	false
2021-08-01T22:45Z	2.098	false
2021-08-01T22:30Z	2.098	false
2021-08-01T22:15Z	2.097	false
2021-08-01T22:00Z	2.097	false
2021-08-01T21:45Z	2.098	false
2021-08-01T21:30Z	2.098	false
2021-08-01T21:15Z	2.098	false
2021-08-01T21:00Z	2.098	false
2021-08-01T20:45Z	2.098	false
2021-08-01T20:30Z	2.098	false
2021-08-01T20:15Z	2.099	false
2021-08-01T20:00Z	2.099	false
2021-08-01T19:45Z	2.1	false
2021-08-01T19:30Z	2.098	false
2021-08-01T19:15Z	2.103	false
2021-08-01T19:00Z	2.097	false
2021-08-01T18:45Z	2.097	false
2021-08-01T18:30Z	2.099	false
2021-08-01T18:15Z	2.101	false
2021-08-01T18:00Z	2.101	false
2021-08-01T17:45Z	2.099	false
2021-08-01T17:30Z	2.108	false
2021-08-01T17:15Z	2.111	false
2021-08-01T17:00Z	2.105	false
2021-08-01T16:45Z	2.111	false
2021-08-01T16:30Z	2.101	false
2021-08-01T16:15Z	2.104	false
2021-08-01T16:00Z	2.103	false
2021-08-01T15:45Z	2.108	false
2021-08-01T15:30Z	2.102	false
2021-08-01T15:15Z	2.103	false
2021-08-01T15:00Z	2.111	false
2021-08-01T14:45Z	2.108	false
2021-08-01T14:30Z	2.103	false
2021-08-01T14:15Z	2.126	false
2021-08-01T14:00Z	2.101	false
2021-08-01T13:45Z	2.106	false
2021-08-01T13:30Z	2.103	false
2021-08-01T13:15Z	2.11	false
2021-08-01T13:00Z	2.103	false
2021-08-01T12:45Z	2.102	false
2021-08-01T12:30Z	2.1	false
2021-08-01T12:15Z	2.11	false
2021-08-01T12:00Z	2.104	false
2021-08-01T11:45Z	2.103	false
2021-08-01T11:30Z	2.098	false
2021-08-01T11:15Z	2.104	false
2021-08-01T11:00Z	2.106	false
2021-08-01T10:45Z	2.101	false
2021-08-01T10:30Z	2.101	false
2021-08-01T10:15Z	2.104	false
2021-08-01T10:00Z	2.103	false
2021-08-01T09:45Z	2.096	false
2021-08-01T09:30Z	2.108	false
2021-08-01T09:15Z	2.107	false
2021-08-01T09:00Z	2.101	false
2021-08-01T08:45Z	2.105	false
2021-08-01T08:30Z	2.102	false
2021-08-01T08:15Z	2.11	false
2021-08-01T08:00Z	2.104	false
2021-08-01T07:45Z	2.102	false
2021-08-01T07:30Z	2.101	false
2021-08-01T07:15Z	2.103	false
2021-08-01T07:00Z	2.102	false
2021-08-01T06:45Z	2.103	false
2021-08-01T06:30Z	2.102	false
2021-08-01T06:15Z	2.103	false
2021-08-01T06:00Z	2.102	false
2021-08-01T05:45Z	2.103	false
2021-08-01T05:30Z	2.102	false
2021-08-01T05:15Z	2.102	false
2021-08-01T05:00Z	2.104	false
2021-08-01T04:45Z	2.102	false
2021-08-01T04:30Z	2.103	false
2021-08-01T04:15Z	2.103	false
2021-08-01T04:00Z	2.102	false
2021-08-01T03:45Z	2.101	false
2021-08-01T03:30Z	2.102	false
2021-08-01T03:15Z	2.102	false
2021-08-01T03:00Z	2.101	false
2021-08-01T02:45Z	2.101	false
2021-08-01T02:30Z	2.101	false
2021-08-01T02:15Z	2.102	false
2021-08-01T02:00Z	2.102	false
2021-08-01T01:45Z	2.103	false
2021-08-01T01:30Z	2.103	false
2021-08-01T01:15Z	2.106	false
2021-08-01T01:00Z	2.106	false
2021-08-01T00:45Z	2.11	false
2021-08-01T00:30Z	2.11	false
2021-08-01T00:15Z	2.11	false
2021-08-01T00:00Z	2.111	false
2021-07-31T23:45Z	2.111	false
2021-07-31T23:30Z	2.112	false
2021-07-31T23:15Z	2.111	false
2021-07-31T23:00Z	2.112	false
2021-07-31T22:45Z	2.112	false
2021-07-31T22:30Z	2.112	false
2021-07-31T22:15Z	2.114	false
2021-07-31T22:00Z	2.114	false
2021-07-31T21:45Z	2.114	false
2021-07-31T21:30Z	2.114	false
2021-07-31T21:15Z	2.114	false
2021-07-31T21:00Z	2.115	false
2021-07-31T20:45Z	2.116	false
2021-07-31T20:30Z	2.116	false
2021-07-31T20:15Z	2.115	false
2021-07-31T20:00Z	2.119	false
2021-07-31T19:45Z	2.119	false
2021-07-31T19:30Z	2.118	false
2021-07-31T19:15Z	2.118	false
2021-07-31T19:00Z	2.12	false
2021-07-31T18:45Z	2.118	false
2021-07-31T18:30Z	2.116	false
2021-07-31T18:15Z	2.114	false
2021-07-31T18:00Z	2.119	false
2021-07-31T17:45Z	2.113	false
2021-07-31T17:30Z	2.122	false
2021-07-31T17:15Z	2.117	false
2021-07-31T17:00Z	2.11	false
2021-07-31T16:45Z	2.115	false
2021-07-31T16:30Z	2.112	false
2021-07-31T16:15Z	2.112	false
2021-07-31T16:00Z	2.119	false
2021-07-31T15:45Z	2.114	false
2021-07-31T15:30Z	2.111	false
2021-07-31T15:15Z	2.119	false
2021-07-31T15:00Z	2.112	false
2021-07-31T14:45Z	2.114	false
2021-07-31T14:30Z	2.119	false
2021-07-31T14:15Z	2.115	false
2021-07-31T14:00Z	2.11	false
2021-07-31T13:45Z	2.121	false
2021-07-31T13:30Z	2.108	false
2021-07-31T13:15Z	2.114	false
2021-07-31T13:00Z	2.114	false
2021-07-31T12:45Z	2.109	false
2021-07-31T12:30Z	2.109	false
2021-07-31T12:15Z	2.107	false
2021-07-31T12:00Z	2.114	false
2021-07-31T11:45Z	2.101	false
2021-07-31T11:30Z	2.114	false
2021-07-31T11:15Z	2.1	false
2021-07-31T11:00Z	2.1	false
2021-07-31T10:45Z	2.108	false
2021-07-31T10:30Z	2.11	false
2021-07-31T10:15Z	2.096	false
2021-07-31T10:00Z	2.092	false
2021-07-31T09:45Z	2.101	false
2021-07-31T09:30Z	2.094	false
2021-07-31T09:15Z	2.099	false
2021-07-31T09:00Z	2.104	false
2021-07-31T08:45Z	2.093	false
2021-07-31T08:30Z	2.096	false
2021-07-31T08:15Z	2.093	false
2021-07-31T08:00Z	2.092	false
2021-07-31T07:45Z	2.092	false
2021-07-31T07:30Z	2.092	false
2021-07-31T07:15Z	2.091	false
2021-07-31T07:00Z	2.09	false
2021-07-31T06:45Z	2.086	false
2021-07-31T06:30Z	2.089	false
2021-07-31T06:15Z	2.09	false
2021-07-31T06:00Z	2.088	false
2021-07-31T05:45Z	2.089	false
2021-07-31T05:30Z	2.087	false
2021-07-31T05:15Z	2.087	false
2021-07-31T05:00Z	2.085	false
2021-07-31T04:45Z	2.086	false
2021-07-31T04:30Z	2.086	false
2021-07-31T04:15Z	2.085	false
2021-07-31T04:00Z	2.086	false
2021-07-31T03:45Z	2.087	false
2021-07-31T03:30Z	2.087	false
2021-07-31T03:15Z	2.088	false
2021-07-31T03:00Z	2.089	false
2021-07-31T02:45Z	2.091	false
2021-07-31T02:30Z	2.091	false
2021-07-31T02:15Z	2.094	false
2021-07-31T02:00Z	2.096	false
2021-07-31T01:45Z	2.098	false
2021-07-31T01:30Z	2.1	false
2021-07-31T01:15Z	2.103	false
2021-07-31T01:00Z	2.105	false
2021-07-31T00:45Z	2.107	false
2021-07-31T00:30Z	2.111	false
2021-07-31T00:15Z	2.112	false
2021-07-31T00:00Z	2.117	false
2021-07-30T23:45Z	2.118	false
2021-07-30T23:30Z	2.122	false
2021-07-30T23:15Z	2.123	false
2021-07-30T23:00Z	2.125	false
2021-07-30T22:45Z	2.127	false
2021-07-30T22:30Z	2.13	false
2021-07-30T22:15Z	2.13	false
2021-07-30T22:00Z	2.13	false
2021-07-30T21:45Z	2.128	false
2021-07-30T21:30Z	2.126	false
2021-07-30T21:15Z	2.123	false
2021-07-30T21:00Z	2.12	false
2021-07-30T20:45Z	2.116	false
2021-07-30T20:30Z	2.112	false
2021-07-30T20:15Z	2.109	false
2021-07-30T20:00Z	2.099	false
2021-07-30T19:45Z	2.103	false
2021-07-30T19:30Z	2.1	false
2021-07-30T19:15Z	2.1	false
2021-07-30T19:00Z	2.1	false
2021-07-30T18:45Z	2.102	false
2021-07-30T18:30Z	2.103	false
2021-07-30T18:15Z	2.104	false
2021-07-30T18:00Z	2.101	false
2021-07-30T17:45Z	2.103	false
2021-07-30T17:30Z	2.103	false
2021-07-30T17:15Z	2.103	false
2021-07-30T17:00Z	2.102	false
2021-07-30T16:45Z	2.105	false
2021-07-30T16:30Z	2.103	false
2021-07-30T16:15Z	2.102	false
2021-07-30T16:00Z	2.103	false
2021-07-30T15:45Z	2.104	false
2021-07-30T15:30Z	2.104	false
2021-07-30T15:15Z	2.101	false
2021-07-30T15:00Z	2.11	false
2021-07-30T14:45Z	2.107	false
2021-07-30T14:30Z	2.103	false
2021-07-30T14:15Z	2.101	false
2021-07-30T14:00Z	2.104	false
2021-07-30T13:45Z	2.104	false
2021-07-30T13:30Z	2.108	false
2021-07-30T13:15Z	2.1	false
2021-07-30T13:00Z	2.099	false
2021-07-30T12:45Z	2.094	false
2021-07-30T12:30Z	2.099	false
2021-07-30T12:15Z	2.093	false
2021-07-30T12:00Z	2.096	false
2021-07-30T11:45Z	2.098	false
2021-07-30T11:30Z	2.098	false
2021-07-30T11:15Z	2.089	false
2021-07-30T11:00Z	2.093	false
2021-07-30T10:45Z	2.092	false
2021-07-30T10:30Z	2.095	false
2021-07-30T10:15Z	2.093	false
2021-07-30T10:00Z	2.1	false
2021-07-30T09:45Z	2.091	false
2021-07-30T09:30Z	2.096	false
2021-07-30T09:15Z	2.087	false
2021-07-30T09:00Z	2.096	false
2021-07-30T08:45Z	2.091	false
2021-07-30T08:30Z	2.096	false
2021-07-30T08:15Z	2.094	false
2021-07-30T08:00Z	2.097	false
2021-07-30T07:45Z	2.094	false
2021-07-30T07:30Z	2.104	false
2021-07-30T07:15Z	2.098	false
2021-07-30T07:00Z	2.097	false
2021-07-30T06:45Z	2.099	false
2021-07-30T06:30Z	2.099	false
2021-07-30T06:15Z	2.099	false
2021-07-30T06:00Z	2.099	false
2021-07-30T05:45Z	2.1	false
2021-07-30T05:30Z	2.099	false
2021-07-30T05:15Z	2.1	false
2021-07-30T05:00Z	2.1	false
2021-07-30T04:45Z	2.101	false
2021-07-30T04:30Z	2.102	false
2021-07-30T04:15Z	2.102	false
2021-07-30T04:00Z	2.102	false
2021-07-30T03:45Z	2.102	false
2021-07-30T03:30Z	2.103	false
2021-07-30T03:15Z	2.103	false
2021-07-30T03:00Z	2.103	false
2021-07-30T02:45Z	2.103	false
2021-07-30T02:30Z	2.104	false
2021-07-30T02:15Z	2.102	false
2021-07-30T02:00Z	2.103	false
2021-07-30T01:45Z	2.102	false
2021-07-30T01:30Z	2.102	false
2021-07-30T01:15Z	2.103	false
2021-07-30T01:00Z	2.103	false
2021-07-30T00:45Z	2.102	false
2021-07-30T00:30Z	2.102	false
2021-07-30T00:15Z	2.102	false
2021-07-30T00:00Z	2.103	false
2021-07-29T23:45Z	2.102	false
2021-07-29T23:30Z	2.103	false
2021-07-29T23:15Z	2.103	false
2021-07-29T23:00Z	2.103	false
2021-07-29T22:45Z	2.104	false
2021-07-29T22:30Z	2.103	false
2021-07-29T22:15Z	2.103	false
2021-07-29T22:00Z	2.103	false
2021-07-29T21:45Z	2.102	false
2021-07-29T21:30Z	2.102	false
2021-07-29T21:15Z	2.103	false
2021-07-29T21:00Z	2.102	false
2021-07-29T20:45Z	2.102	false
2021-07-29T20:30Z	2.1	false
2021-07-29T20:15Z	2.103	false
2021-07-29T20:00Z	2.103	false
2021-07-29T19:45Z	2.103	false
2021-07-29T19:30Z	2.103	false
2021-07-29T19:15Z	2.104	false
2021-07-29T19:00Z	2.105	false
2021-07-29T18:45Z	2.104	false
2021-07-29T18:30Z	2.106	false
2021-07-29T18:15Z	2.107	false
2021-07-29T18:00Z	2.104	false
2021-07-29T17:45Z	2.109	false
2021-07-29T17:30Z	2.1	false
2021-07-29T17:15Z	2.106	false
2021-07-29T17:00Z	2.102	false
2021-07-29T16:45Z	2.105	false
2021-07-29T16:30Z	2.102	false
2021-07-29T16:15Z	2.107	false
2021-07-29T16:00Z	2.107	false
2021-07-29T15:45Z	2.103	false
2021-07-29T15:30Z	2.104	false
2021-07-29T15:15Z	2.11	false
2021-07-29T15:00Z	2.108	false
2021-07-29T14:45Z	2.107	false
2021-07-29T14:30Z	2.105	false
2021-07-29T14:15Z	2.113	false
2021-07-29T14:00Z	2.108	false
2021-07-29T13:45Z	2.106	false
2021-07-29T13:30Z	2.106	false
2021-07-29T13:15Z	2.115	false
2021-07-29T13:00Z	2.109	false
2021-07-29T12:45Z	2.107	false
2021-07-29T12:30Z	2.109	false
2021-07-29T12:15Z	2.109	false
2021-07-29T12:00Z	2.117	false
2021-07-29T11:45Z	2.107	false
2021-07-29T11:30Z	2.109	false
2021-07-29T11:15Z	2.118	false
2021-07-29T11:00Z	2.111	false
2021-07-29T10:45Z	2.106	false
2021-07-29T10:30Z	2.116	false
2021-07-29T10:15Z	2.11	false
2021-07-29T10:00Z	2.11	false
2021-07-29T09:45Z	2.11	false
2021-07-29T09:30Z	2.111	false
2021-07-29T09:15Z	2.103	false
2021-07-29T09:00Z	2.115	false
2021-07-29T08:45Z	2.108	false
2021-07-29T08:30Z	2.101	false
2021-07-29T08:15Z	2.105	false
2021-07-29T08:00Z	2.103	false
2021-07-29T07:45Z	2.107	false
2021-07-29T07:30Z	2.103	false
2021-07-29T07:15Z	2.104	false
2021-07-29T07:00Z	2.105	false
2021-07-29T06:45Z	2.105	false
2021-07-29T06:30Z	2.106	false
2021-07-29T06:15Z	2.106	false
2021-07-29T06:00Z	2.107	false
2021-07-29T05:45Z	2.107	false
2021-07-29T05:30Z	2.107	false
2021-07-29T05:15Z	2.109	false
2021-07-29T05:00Z	2.11	false
2021-07-29T04:45Z	2.11	false
2021-07-29T04:30Z	2.11	false
2021-07-29T04:15Z	2.112	false
2021-07-29T04:00Z	2.112	false
2021-07-29T03:45Z	2.114	false
2021-07-29T03:30Z	2.114	false
2021-07-29T03:15Z	2.116	false
2021-07-29T03:00Z	2.116	false
2021-07-29T02:45Z	2.117	false
2021-07-29T02:30Z	2.117	false
2021-07-29T02:15Z	2.119	false
2021-07-29T02:00Z	2.118	false
2021-07-29T01:45Z	2.119	false
2021-07-29T01:30Z	2.119	false
2021-07-29T01:15Z	2.12	false
2021-07-29T01:00Z	2.12	false
2021-07-29T00:45Z	2.119	false
2021-07-29T00:30Z	2.12	false
2021-07-29T00:15Z	2.122	false
2021-07-29T00:00Z	2.122	false
2021-07-28T23:45Z	2.121	false
2021-07-28T23:30Z	2.121	false
2021-07-28T23:15Z	2.122	false
2021-07-28T23:00Z	2.123	false
2021-07-28T22:45Z	2.121	false
2021-07-28T22:30Z	2.121	false
2021-07-28T22:15Z	2.124	false
2021-07-28T22:00Z	2.123	false
2021-07-28T21:45Z	2.123	false
2021-07-28T21:30Z	2.124	false
2021-07-28T21:15Z	2.123	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
• Check the long term flood risk for an area in England.

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