Does Gillingham flood?

What the Environment Agency's rivers-and-sea flood-risk data says about Gillingham

Ordnance Survey places 173 postcodes in Gillingham in the Environment Agency's rivers-and-sea flood-risk dataset (Risk of Flooding from Rivers and Sea). Each postcode is counted once, under the worst band any of its properties reaches; together they hold 4,072 properties in the EA dataset's likelihood bands.

This dataset covers flooding from rivers and the sea only — one of five flood sources. Surface water, groundwater, sewers and reservoirs are assessed separately, so a postcode missing from it is not proof that a place cannot flood. The band describes the land around properties (allowing for defences), not any single address and not today's conditions.

Flood warning areas near Gillingham

4 Environment Agency flood warning areas lie within 10 km of Gillingham. The EA has issued 187 flood warnings and alerts for them since 2006, most recently on 26 Oct 2026.

• Areas at risk of flooding from the tidal River Medway and the Medway Estuary, including Aylesford, Larkfield, Wouldham, Medway Towns, Upnor, Hoo and Lower Halstow
  9 warnings and alerts since 2006, latest Apr 2024 3.2 km
• Areas at risk of tidal flooding on the Tidal Medway, Medway estuary and Isle of Grain, including Aylesford, Medway Towns, Lower Halstow, Middle Stoke and Lower Stoke
  89 warnings and alerts since 2006, latest Oct 2026 4.4 km
• Areas at risk of tidal flooding in the North Kent Marshes between Shorne Marsh and Allhallows, including Lower Higham and Cliffe
  no warning on record since 2006 7.1 km
• Areas at risk of tidal flooding from Dartford to Allhallows, including Crayford, Greenhithe, Northfleet, Gravesend and the North Kent Marshes
  89 warnings and alerts since 2006, latest Oct 2026 7.4 km

Recorded floods near Gillingham

Floods whose mapped extent (EA Recorded Flood Outlines) reached within ~5 km of Gillingham, most recent first. Records, not floods: no outline on the record is not evidence a place has not flooded. See them on the map →

• 1 Feb 1953 — 07301B100_FEB1953_Darnet Fort Sea
• 1 Feb 1953 — 07301B100_FEB1953_Nor Marsh Sea
• 1 Feb 1953 — 07301E900/C100_FEB1953_Isle of Grain S24 Sea
• 1 Feb 1953 — 07301C100_FEB1953_Medway Tidal_Snodland Sea
• 1 Feb 1953 — 07301E900/C100_FEB1953_Isle of Grain Sea
• 31 Jan 1953 — 07301E900_FEB1953_Dartford Creek_Denton Sea

Rainfall near Gillingham

Gillingham gets about 576 mm of rain a year on average (wettest month October, 71 mm; driest March, 34 mm). That is 50% drier than the UK as a whole, which averages 1,163 mm a year. Source: Met Office HadUK-Grid 1991–2020 (5 km grid), 2.4 km from the place centre.

The nearest rain gauge, Rainfall station (5.8 km away), recorded 1.4 mm in the last 24 hours and 41.0 mm in the last 7 days (latest reading 29 min ago).

At-risk postcodes in Gillingham

Every postcode Ordnance Survey places in Gillingham that appears in the EA's rivers-and-sea dataset, worst band first. Each links to its own flood-risk page.

High likelihood (29)

Medium likelihood (8)

Low likelihood (96)

Very low likelihood (40)

Postcode districts

Sources

FloodRadar summarises public flood data. It is not a flood-risk survey of any property, and it does not replace official GOV.UK flood warnings or the GOV.UK long-term flood risk service.