Does SG15 flood?

Yes — parts of the SG15 district carry real flood risk: 3 of its 11 at-risk postcodes reach the Environment Agency's High likelihood band. The SG15 postcode district sits close to Arlesey, Shefford, Biggleswade and surrounding villages in parts of Central Bedfordshire and Hertfordshire.

11 postcodes in the SG15 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 3 high, 2 medium, 6 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 SG15 postcodes are at risk?

SG15 6RF up to High SG15 6XB up to High SG15 6XL up to High SG15 6GH up to Medium SG15 6SE up to Medium SG15 6UX up to Low SG15 6XA up to Low SG15 6XD up to Low SG15 6XE up to Low SG15 6XH up to Low SG15 6XT up to Low

Rivers and flooding history near SG15

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

ARLESEY GS — 0.7 km away
Arlesey on the River Hiz — 0.7 km away, highest on record 1.40m
SHEFFORD GS — 5.4 km away
Shefford on the River Flit — 5.4 km away, highest on record 1.74m

55 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (23 at warning level or above), most recently 15 February 2026. Warnings cover flood areas, not individual addresses.

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

October 1993 (1993) — about 0.6 km from the centre
January 1988 (1988) — about 2.9 km from the centre
October 1987 (1987) — about 3.2 km from the centre
March 1947 (1947) — about 6.5 km from the centre

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

🏠 Buying or renting in SG15? 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

SG14 SG16 SG13 SG17 SG12 SG18 SG11 SG19

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.