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Water Level Easing
Easing — down from 0.55 at 04:00, now 0.48
0.48

Three Bridges

Gatwick Stream
Mole catchment • Three Bridges • West Sussex • ID: 3225TH • Level
(25m ago) • 4 readings/hr • 190 views

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⤴ Unusual rise — FloodRadar+Top 1% rise rate for this gauge.
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Not an emergency service — if in danger call 999. Alerts rely on EA/SEPA/NRW data and are best-efforts. Terms

Current Level
0.482 mASD
▼ Easing (+2cm/hr)
24h Max
0.716 mASD
24h Min
0.465 mASD
Typical Range
0.20 - 3.06
mASD
Highest Recorded
3.26 mASD
EA official record
A 3.91 reading (16 Mar 2013) sits in our unverified raw history and is not treated as the record
Current level is 15% of this
🚽 Sewage overflows nearby

Recent Water Levels

🌍 floodradar.co.uk
1 day

Recent Readings

Falling · -6 cm over 7h
08 Oct 13:30 ▲ +0.8 cm 0.482 mASD
08 Oct 13:15 ▲ +0.3 cm 0.474 mASD
08 Oct 13:00 ▲ +0.3 cm 0.471 mASD
08 Oct 12:45 ▲ +0.3 cm 0.468 mASD
08 Oct 12:15 ▼ -0.4 cm 0.465 mASD
08 Oct 11:45 ▼ -1 cm 0.469 mASD
08 Oct 11:30 ▼ -2 cm 0.479 mASD
08 Oct 11:15 ▼ -2 cm 0.502 mASD
08 Oct 11:00 ▼ -0.8 cm 0.519 mASD
08 Oct 10:30 ▲ +1 cm 0.527 mASD
08 Oct 10:15 ▲ +0.7 cm 0.515 mASD
08 Oct 10:00 ▲ +0.2 cm 0.508 mASD
08 Oct 09:15 ▼ -0.7 cm 0.506 mASD
08 Oct 09:00 ▼ -1 cm 0.513 mASD
08 Oct 08:45 ▼ -1 cm 0.527 mASD
08 Oct 08:15 ▲ +0.1 cm 0.541 mASD
08 Oct 07:45 ▲ +0.3 cm 0.540 mASD
08 Oct 07:00 ▼ -0.1 cm 0.537 mASD
08 Oct 06:30 ▲ +0.1 cm 0.538 mASD
08 Oct 06:15 0.537 mASD

Station Details

  • Monitoring Station: Three Bridges
  • Watercourse: Gatwick Stream
  • Nearest Town: Three Bridges
  • County: West Sussex
  • Nearest reservoir: Ardingly (8.6 km) · 22.8% full (as of 27 Sep 2026)
  • Coordinates: 51°7'1"N 0°9'45"W (51.116941, -0.162605)
  • Open in: Google Maps · Apple Maps (opens your maps app)
  • Date Opened: 1 Jan 2001
  • Status: Active
  • Station Type: River level station
Technical details: references, datum, range, flow archive
  • Station Reference: 3225TH
  • RLOI id: 7252 (the EA's check-for-flooding station id)
  • EA Gauge ID: 3225TH-level-stage-i-15_min-mASD
  • Parameter: Level
  • Unit: mASD
  • Typical rise rate: 5 cm/hr (p95 sustained over 90 days)
  • Typical data delay: ~22 min (measured reading→publication lag)
  • Tidal: No
  • Lock / structure: No
  • Catchment Area: Mole
  • Typical Range: 0.198 – 3.060 mASD
  • EA Cross-check: 0.47 mASD (EA at 8 Oct 13:15)

Geographic coordinates may reflect the access point for the gauge, and not the precise location in the watercourse that it is taking readings from.

Nearby Stations

Gauges connected to this river, and others nearby. A distance “by river” follows the river on the map; any other is in a straight line.

Connected upstream

Connected downstream

Same river system, separate branch

Distances by river: OS Open Rivers. Contains OS data © Crown copyright and database rights 2026.

💧 Storm overflows upstream of this gauge

None of the storm overflows FloodRadar holds is traced upstream of this gauge on the mapped river network. That is not the same as none: the map leaves out many small streams and culverts, so an overflow it cannot place may still drain here, and not every company publishes every overflow. Those nearby are listed below.

Nearby, connection not known

Within 6 km in a straight line, but the river map cannot say whether their water passes this gauge.

💧
Thames Water · into Tributary Of Gatwick Stream · 3.4 km away in a straight line · no mapped watercourse close enough to be sure
33 spills · 363 hours in 2025
Not discharging now · last
💧
Thames Water · into Mill Stream · 4.2 km away in a straight line · no mapped watercourse close enough to be sure
5 spills · 23 hours in 2025
Not discharging now · last
💧
Thames Water · into Gatwick Stream · 5.2 km away in a straight line · no mapped watercourse close enough to be sure
12 spills · 98 hours in 2025
Not discharging now · last
💧
Southern Water · into Trib Of The River Medway · 5.8 km away in a straight line · its watercourse is not on the river map
29 spills · 176 hours in 2025
Not discharging now · last

1 other overflow within 6 km is downstream of this gauge or on another branch of the river network, so it is not listed.

These are the water companies' monitor statuses; a spill does not by itself explain a change in the gauge level. River connections and distances are traced on OS Open Rivers (edition 2026-04), which leaves out many small channels. Explore the sewage map →

Contains OS data © Crown copyright and database rights 2026.

Rainfall & Weather

Loading rainfall and weather data...

How often this river runs high

This gauge rarely reaches its typical high of 3.06 m: 0 days since 2017. This year so far: 0 days.

2026 0 days so far
2025 0 days
2024 0 days
2023 0 days
2022 0 days
2021 0 days
2020 0 days
2019 0 days
2018 0 days
2017 0 days

Counted from each day's highest reading. Days with missing or implausible readings are left out.

Flood history near this gauge

Official Environment Agency warnings issued since 2012 for the 7 flood areas linked to this gauge (nearest 1.9 km away).

22flood warnings 120flood alerts

Most recent flood warning: 24 Dec 2022 — Weatherhill Stream at Smallfield

Year by year
YearWarningsAlerts
2026 0 5
2025 0 6
2024 0 14
2023 0 10
2022 3 7
2021 0 6
2020 1 8
2019 3 14
2018 0 2
2017 0 3
2016 0 13
2015 0 4
2014 10 9
2013 4 8
2012 1 11

Warnings apply to a whole flood area, not necessarily this exact spot. Years before 2006 aren't covered by the EA's historic record. See also the Three Bridges flood history.

Flood areas linked to this gauge

Flood warnings and alerts are issued for whole areas. These are the 7 areas linked to this gauge, nearest first.

Frequently asked questions

Is the Gatwick Stream at Three Bridges flooding today?

The current level is 0.48m, which is within the typical range of 0.20 to 3.06m. Flooding is unlikely at this level.

Is the river level rising or falling at Three Bridges?

Based on the most recent readings, the level is currently falling slightly. The chart above shows the last 12 hours of measurements by default (up to 7 days), updated roughly every 15 minutes.

Why is the level slowly falling?

When little or no rain has fallen for a while, a river level gradually drops as the water stored in the ground and soil drains away with nothing to replace it. This is called baseflow recession and is normal in dry spells. A gentle decline like this is expected and is not a sign of a problem — downstream gauges often recede a little faster than headwaters further upstream, and levels recover once rain returns.

What is a normal level for the Gatwick Stream at Three Bridges?

The typical range at this station is 0.20m to 3.06m, based on Environment Agency historical data. Levels above 3.06m are higher than usually seen and may indicate a flood risk.

How often is this river level data updated?

Readings are supplied by the Environment Agency gauge. FloodRadar checks for updates roughly every 15 minutes; the timestamp above shows how recent the latest available reading is.

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📮 Flood risk by postcode near this gauge

Postcodes within 5 km with properties in the Environment Agency’s rivers-and-sea flood-risk bands:

Check any UK postcode’s flood risk →

🏠 Buying or renting around here? Get the Property Flood-Risk Report for any English postcode — official risk band, recorded floods, warning history, river behaviour and nearby storm overflows. £19 one-off. Learn more →