East Sussex flood risk 2026
Gera Flood Exposure Score & home insurance context
What is the flood risk in East Sussex?
East Sussex has a Gera Flood Exposure Score of 4/10 (Moderate), based on 72 Environment Agency flood warning areas attributed to the county. The GFES is a 1–10 index of EA flood warning area density per English county, from the EA Flood Monitoring API (OGL v3.0), as of June 2026.
| Metric | Value |
|---|---|
| Gera Flood Exposure Score (GFES) | 4 / 10 |
| Risk band | Moderate |
| EA flood warning areas | 72 |
| EA operational region | Kent S London and E Sussex |
| National rank | 22 of 151 counties |
| Data as of | June 2026 |
Explore flood exposure interactively
Compare East Sussex to any other English county, or recalculate for a different area.
Gera Flood Exposure Score (GFES)
4 / 10
Moderate flood exposure
East Sussex — flood risk summary
- EA Flood Warning Areas
- 72
- EA Region
- Kent S London and E Sussex
- GFES / 10
- 4
- Risk band
- Moderate
What this means for your home insurance
East Sussex has a Moderate GFES (4/10). Some areas within the county carry elevated flood risk. The GFES covers the whole county — your individual property risk may be higher or lower.
Source: Environment Agency Flood Monitoring API (OGL v3.0), June 2026. The GFES measures EA flood warning area density per county — see full methodology.
Frequently asked questions
- What is the flood risk in East Sussex?
- East Sussex has a Gera Flood Exposure Score (GFES) of 4/10 — rated Moderate. The score is based on 72 EA flood warning areas in the county (Environment Agency Flood Monitoring API, OGL v3.0, June 2026). A score of 10 is the highest in England (North Yorkshire).
- How many EA flood warning areas does East Sussex have?
- As of June 2026, the Environment Agency has designated 72 flood warning areas attributed to East Sussex. These are the zones the EA monitors for river and sea flooding risk. The data comes from the EA Flood Monitoring API (OGL v3.0).
- Will my home insurance be affected by flood risk in East Sussex?
- A GFES of 4/10 in East Sussex indicates moderate flood exposure. Insurers factor flood zone classification and proximity to water into home insurance pricing. The GFES is a county-level index — your individual property risk may differ. Check your specific address via the free EA Long Term Flood Risk service before comparing quotes.
- Which EA region covers East Sussex?
- East Sussex falls primarily within the Kent S London and E Sussex Environment Agency operational area. EA regions manage flood monitoring, alerting, and risk management for their geography.
- How does East Sussex compare to other counties?
- East Sussex ranks 22 of 151 counties by GFES. The highest-scoring county in England is North Yorkshire (GFES 10/10, 238 EA flood areas). Compare all counties at gerasure.com/flood-risk-by-area.
Counties with similar flood exposure
Get flood insurance quotes for East Sussex
GeraInsure helps homeowners in moderate flood-risk counties find specialist cover. Join the waitlist for early access to our quote engine.
Contains public sector information published by Environment Agency and licensed under the Open Government Licence v3.0. Source: Environment Agency Flood Monitoring API — Flood Warning Areas (June 2026, published 20 June 2026).
The GFES is a county-level density index — it does not replace an individual property risk check. Use the free EA Long Term Flood Risk service for property-level assessment. See full methodology.