Town CLIMATE RISK

Bethesda Climate Risk Data

Bethesda is a town in Gwynedd, within Gwynedd council area. This page shows flood, heat, air quality, and subsidence risk data for Bethesda, drawn from official UK government sources. LocalRisk tracks 12 postcodes within Bethesda.

Bethesda has relatively low flood risk based on Environment Agency NaFRA2 data. 4.8% of postcodes in Bethesda fall into high or higher flood risk bands. Flood risk at street level can differ significantly from these area-wide averages — elevation, proximity to watercourses, and local drainage all affect individual postcode risk bands. Check a specific postcode above for your exact Environment Agency flood risk rating.

Heat risk in Bethesda is relatively low under current projections. Met Office UKCP18 data suggests around 8 days above 25°C per year in this area by the 2021-2040 period (central estimate, high emissions scenario). These are probabilistic projections — actual outcomes depend on future emissions levels. Properties in Bethesda without adequate ventilation or insulation may face increasing summer heat stress and higher cooling costs as temperatures rise.

Air quality in Bethesda averages 4.3 µg/m³ PM2.5, which is relatively low — meeting the WHO annual mean guideline of 5 µg/m³. Defra UK-AIR monitoring data underpins this figure. PM2.5 levels are typically higher near busy roads, industrial areas, and dense urban centres, and lower in parks, green corridors, and residential backstreets.

Subsidence data for Bethesda is sourced from the British Geological Survey GeoSure dataset, which maps clay shrink-swell risk across Great Britain. In areas with shrink-swell clay, foundations can shift as soils dry out in summer and re-wet in winter. Properties built before 1980 on clay-rich ground are most exposed. Check a specific postcode for Bethesda for a property-level subsidence risk band.

Anyone buying, renting, or advising on property in Bethesda can use LocalRisk to run a free climate risk check on any UK postcode. Each report covers flood risk (Environment Agency), heat projections (Met Office), air quality (Defra), subsidence (BGS), and coastal erosion where applicable — the same underlying datasets used by insurers, conveyancers, and local planning authorities. Use the postcode links above to check a specific address in Bethesda.

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