Does NN18 flood?

Yes — parts of the NN18 district carry real flood risk: 5 of its 23 at-risk postcodes reach the Environment Agency's High likelihood band. The NN18 postcode district covers Lloyds & Corby Village, Oakley, Gretton & Weldon, Kingswood, close to Weldon, Newton, Brigstock, and surrounding villages in parts of North Northamptonshire and Leicestershire.

23 postcodes in the NN18 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 5 high, 3 medium, 11 low, 4 very low. A postcode not listed here has no properties in any recorded risk band (which is good news, but never proof it cannot flood).

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Which NN18 postcodes are at risk?

Rivers and flooding history near NN18

The rivers that matter here, each monitored live on FloodRadar:

Barford Bridge on the River Ise — 5.1 km away, highest on record 1.90m
Brigstock on the Harpers Brook — 6.2 km away, highest on record 3.04m
Ashley on the River Welland — 7.8 km away, highest on record 2.95m
Medbourne on the Medbourne Brook — 10.8 km away, highest on record 1.22m

74 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (16 at warning level or above), most recently 1 March 2026. Warnings cover flood areas, not individual addresses.

Recorded flood extents near the district (Environment Agency record):

LNA_1998_April_River Welland (1998) — about 12.5 km from the centre
LNA_1998_April_River Nene_d/s Northampton (1998) — about 13.3 km from the centre
LNA_1998_April_Harpers Brook_Great Oakley (1998) — about 2.2 km from the centre
LNA_1947_March_River Nene_d/s Northampton (1947) — about 13.9 km from the centre

Records, not floods: no outline on the record is not evidence a place has not flooded.

🏠 Buying or renting in NN18? The full property flood-risk report covers any postcode here — the official likelihood band, every recorded flood nearby with distances, warning history year by year, how the local rivers behave, and an insurance outlook, print-ready for £19. See what's in the report →

Flood risk in nearby postcode districts

NN17 NN16 NN15 NN14 NN13 NN12 NN11 NN10

Band = the worst likelihood band of any property in that postcode (EA Risk of Flooding from Rivers & Sea, defence-adjusted, area-level). Check any postcode in detail — or get the full £19 property report — at the property flood-risk report. © Environment Agency copyright and/or database right 2025. All rights reserved. Some features of this map are based on digital spatial data from the Centre for Ecology & Hydrology, © NERC (CEH). © Crown Copyright and Database Rights 2025 OS AC0000807064. This product is produced in part from PAF® and Multiple Residence Data, the copyright in which is owned by Royal Mail Group Limited and/or Royal Mail Group plc. All rights reserved. Licence number AC0000807064.