Does Terrington St John flood?

What the Environment Agency's rivers-and-sea flood-risk data says about Terrington St John

Ordnance Survey places 26 postcodes in Terrington St John 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 505 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.

Rivers and live river levels near Terrington St John

Environment Agency gauges within 10 km of Terrington St John watch River Great Ouse, River Nar.

• Magdalen Bridge Tidal
  River Great Ouse · 6.9 km away No recent reading
• Freebridge Tidal
  River Great Ouse · 8.4 km away 3.29 m
  rises and falls with the tide · 24 min ago
• King's Lynn Tidal
  River Great Ouse · 9.3 km away 3.29 mAOD
  rises and falls with the tide · 24 min ago
• Setchey Bridge
  River Nar · 9.7 km away 0.39 m
  normal range · 24 min ago

Distances are from the middle of Terrington St John's at-risk postcodes. Tidal and structure gauges are shown as readings only — the tide and sluice gates move them, not floods. A gauge with no recent reading shows no level.

Flood warning areas near Terrington St John

12 Environment Agency flood warning areas lie within 10 km of Terrington St John. The EA has issued 44 flood warnings and alerts for them since 2006, most recently on 8 Oct 2025.

• Terrington St Clement, Walpole St Andrew, Walpole St Peter, Terrington St John, Walpole Highway, West Walton, Walton Highway, Wisbech, Emneth, Walsoken, Marshland St James and St Johns Fen End
  no warning on record since 2006 3.1 km
• Eau Brink, Saddle Bow, the Wiggenhalls, Tilney St Lawrence, West Walton, Walpole St Peters, Walpole Highway, Watlington, Nordelph, Barroway Drive and Salters Lode
  no warning on record since 2006 3.9 km
• Wiggenhall St Mary The Virgin, Tilney St Lawrence, Tilney cum Islington, Tilney Fen End and Outwell
  no warning on record since 2006 4.1 km
• Saddlebow, Wiggenhall St Germans, Wiggenhall St Peter and Wiggenhall St Mary Magdalen
  no warning on record since 2006 6.4 km
• Admiralty Point, Terrington St Clement, Clenchwarton, Tilney All Saints, Tilney High End, Walpole Cross Keys and Eau Brink
  no warning on record since 2006 7.1 km
• King's Lynn, West Lynn, Clenchwarton, Terrington St Clement, Walpole Cross Keys and Tilney All Saints
  44 warnings and alerts since 2006, latest Oct 2025 7.3 km
• Wash Frontage and the right bank of the Tidal Nene from Walton Dam to Admiralty Point, including Walpole Marsh, Walpole Cross Keys, Bellmount and Wingland Marsh
  no warning on record since 2006 7.7 km
• Saddlebow, South Lynn, and Nelson Street, Queen Street, King Street, Central Road and Estuary Road in Kings Lynn
  no warning on record since 2006 8.2 km
• Wisbech including Leverington Road, Barton Road, Lynn Road, Mount Pleasant Road and Waterlees road
  no warning on record since 2006 8.5 km
• Clenchwarton Road, Poppyfields, St Peter's Road, St Peter's Close, Hare Road, Sculthorpe Avenue, Ferry Road and Fox's Lane in West Lynn
  no warning on record since 2006 8.8 km
• Stow Bridge, Watlington, Setchey and Saddlebow
  no warning on record since 2006 9.0 km
• Nordelph, Salters Lode, Barroway Drove and Stow Bridge
  no warning on record since 2006 9.5 km

Recorded floods near Terrington St John

None mapped within ~5 km of Terrington St John.

No recorded outline within ~5 km of Terrington St John means no flood was mapped here, which is not evidence none happened: the Environment Agency mapped only some floods, mapping effort rose sharply after about 2000, and surface-water flooding is largely absent from this record. Open the recorded-floods map →

Rainfall near Terrington St John

Terrington St John gets about 592 mm of rain a year on average (wettest month October, 59 mm; driest March, 36 mm). That is 49% 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 (14.4 km away), recorded 3.9 mm in the last 24 hours and 51.8 mm in the last 7 days (latest reading 24 min ago).

At-risk postcodes in Terrington St John

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

Medium likelihood (26)

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.