Staines Ash water level
River gauge, River Ash, Surrey, United Kingdom
Right now
Very high for mid-October
Water level
History
20252026
What this means
High water at Staines Ash: the latest reading is 0.10 m, well above normal for mid-October.
The median for mid-October is 0.07 m, based on 21 years of readings, so the river level is 0.03 m above typical. On the same day last year the reading was 0.04 m, a difference of +0.06 m. The record high is 0.37 m, set on September 27, 1995.
It has barely moved over the past 24 hours. The 30-day range is 0.04 m – 0.11 m.
Autumn rain usually starts to lift rivers again after the summer low.
Compared with 21 years of daily readings for this time of year. How to read levels
Key numbers
- Median for this date
- 0.07 m0.03 m above the median for this date
- Normal for this date
- 0.04 m – 0.10 m8 years in 10 fall in this range (21 years of records)
- Normal range
- 0.05 m – 0.50 m
- Same day last year
- 0.04 m+0.06 m
- Lowest and highest in 30 days
- 0.04 m – 0.11 m
- Lowest and highest in 12 months
- 0.04 m – 0.10 m
- Highest on record
- 0.37 mSeptember 27, 1995
- Lowest on record
- 0.02 mOctober 10, 2009
High water: what to watch for
Fast water is stronger than it looks. Even shallow water across a road can move a car, and riverbanks can be undercut and give way without warning.
Upstream gauges on the same river usually show a rise first, which is a useful early warning.
About the River Ash
The River Ash is a small, shallow river in Surrey, England. Its course of 10 kilometres (6.2 mi) is just outside Greater London. Work has been carried out to re-align, clear and build up a small, Littleton head of water and create two backwaters. One backwater dates to the medieval period; the other to the 1990s. It flows as one of the six distributaries of the River Colne from the south of Staines Moor immediately south of the Staines Bypass eastwards through the rest of the borough of Spelthorne before meeting the River Thames.
Text and image from Wikipedia and Wikimedia Commons, licensed under CC BY-SA.
Weather at the gauge
Rain in the last 3 days: 2.7 mm. Rain that falls upstream can take hours or days to show up at a river gauge.
Forecast: Open-Meteo
Map
Other gauges on the River Ash
| Gauge | Level | Compared with normal | 24 hours | Distance |
|---|---|---|---|---|
| Knowle GreenRiver gauge, River Ash | 0.51 m | Normal | ±0 | 1.5 km |
| MardockRiver gauge, River Ash | 0.10 m | Normal | ±0 | 56 km |
| Little HadhamRiver gauge, River Ash | 0.02 m | Normal | ±0 | 65 km |
| Furneux PelhamRiver gauge, River Ash | 0.06 m | Lowest on record | −0.02 m | 68 km |
Nearby gauges
| Gauge | Level | Compared with normal | 24 hours | Distance |
|---|---|---|---|---|
| Staines Trading EstateRiver gauge, River Colne | 1.18 m | Normal | −0.01 m | 0.4 km |
| Pound Mill, StainesRiver gauge, Wraysbury River | 0.08 m | Very low | −0.01 m | 0.5 km |
| StainesRiver gauge, River Thames | 2.66 m | Low | −0.01 m | 1.0 km |
| Hythe EndRiver gauge, Colne Brook | 0.43 m | Normal | −0.01 m | 1.6 km |
| Bell WeirRiver gauge, River Thames | 0.25 m | Very high | ±0 | 1.8 km |
| Stanwell MillRiver gauge, River Colne | 0.68 m | Very high | −0.01 m | 3.0 km |
| Penton HookRiver gauge, River Thames | 0.15 m | Normal | −0.01 m | 3.0 km |
| Horton MillRiver gauge, Colne Brook | 0.12 m | Low | −0.01 m | 3.7 km |
Questions and answers
Is the River Ash at Staines Ash higher than last year?
Yes, it is 0.06 m higher than on the same day last year, when the reading was 0.04 m.
What is a normal level for the River Ash at Staines Ash in mid-October?
The median for mid-October is 0.07 m. In 8 years out of 10 the reading falls between 0.04 m and 0.10 m, based on 21 years of records.
Is the river level the same as the depth of the water?
No. The reading is measured from a fixed zero mark at the gauge, so 0.10 m on the gauge does not mean the water is that deep.
What is the water level of Staines Ash today?
On 18 Oct 2026, 04:30 BST, the water level was 0.10 m. Steady over the last 24 hours.
Is Staines Ash rising or falling?
Steady over the last 24 hours. Steady over the last 7 days.
Is the level of Staines Ash normal?
Very high for mid-October. Compared with 21 years of daily readings for this time of year.
What is the highest water level ever recorded at Staines Ash?
The highest level on record is 0.37 m on September 27, 1995. The lowest is 0.02 m on October 10, 2009.
For specialists
Station codes, datum, parameters, data quality and downloads
- Operator
- Environment Agency
- Station code
ea:3110TH(Agency page)- Coordinates
51.44038, -0.51204(WGS84)- Vertical datum
- station datum
- Update interval
- every 15 minutes
- Licence
- Open Government Licence v3.0. Contains Environment Agency data licensed under the Open Government Licence v3.0
Published series
| Parameter | Last value | Time (UTC) | Quality |
|---|---|---|---|
| Water level | 0.10 m | 2026-10-18 03:30 | Provisional |
Download
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How to cite
Environment Agency: Staines Ash (ea:3110TH). Accessed October 18, 2026 via Nivelmap, https://nivelmap.com/en/united-kingdom/surrey/staines-ash
How we check values
Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.
Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer