Road & rail noise map for Lewes
Town in East Sussex, South East
We analysed 888 postcodes in and around Lewes, East Sussex against DEFRA's Strategic Noise Mapping (Round 4, 2022). 30% of them (264) have mapped road noise of 55 dB or more by day, and 2% have mapped rail noise. 70% of postcodes have no mapped road or rail noise at all — though that reflects major-source modelling, not guaranteed quiet. The highest modelled level we found is at BN7 2DD (road noise 70.0–74.9 dB by day).
Noise map of Lewes
How many postcodes are affected?
Road noise
| Band | Day (LAeq,16h) | Night (Lnight) |
|---|---|---|
| 55.0–59.9 dB day · 50.0–54.9 dB night | 17% (149) | 7% (61) |
| 60.0–64.9 dB day · 55.0–59.9 dB night | 8% (75) | 5% (47) |
| 65.0–69.9 dB day · 60.0–64.9 dB night | 4% (36) | 3% (30) |
| 70.0–74.9 dB day · 65.0–69.9 dB night | <1% (4) | <1% (2) |
| 75.0 dB or more day · 70.0 dB or more night | 0% (0) | 0% (0) |
| Below mapped bands / not mapped | 70% | 84% |
Rail noise
| Band | Day (LAeq,16h) | Night (Lnight) |
|---|---|---|
| 55.0–59.9 dB day · 50.0–54.9 dB night | 1% (13) | 1% (13) |
| 60.0–64.9 dB day · 55.0–59.9 dB night | <1% (1) | <1% (1) |
| 65.0–69.9 dB day · 60.0–64.9 dB night | 0% (0) | 0% (0) |
| 70.0–74.9 dB day · 65.0–69.9 dB night | 0% (0) | 0% (0) |
| 75.0 dB or more day · 70.0 dB or more night | 0% (0) | 0% (0) |
| Below mapped bands / not mapped | 98% | 98% |
Share of the 888 postcodes within ~5 km of the Lewes centre. Source: DEFRA Strategic Noise Mapping Round 4 (2022), Open Government Licence.
Noisiest postcodes in and around Lewes
Check a specific postcode
Example searches: BN7 2RJ · BN8 5RL · BN7 2DD · BN7 2DE · BN7 1PQ · BN7 1RJ
What this data does — and doesn't — cover
- Modelled, not measured.These are DEFRA's computer-modelled estimates (Round 4, 2022), not microphone readings at your door.
- Major sources only. The model covers major roads, major railways and large urban areas. Smaller local roads, neighbours, pubs, building sites and aircraft are not included.
- No mapped noise ≠ quiet. If a location shows no band, it means it falls outside the mapped contours — not that it is silent.
- 2022 snapshot.New roads, developments or traffic changes since 2022 won't show. The next DEFRA round is due around 2027.
More detail on the methodology page.
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Nearby areas
Frequently asked questions
- How noisy is Lewes?
- We analysed 888 postcodes in and around Lewes, East Sussex against DEFRA's Strategic Noise Mapping (Round 4, 2022). 30% of them (264) have mapped road noise of 55 dB or more by day, and 2% have mapped rail noise. 70% of postcodes have no mapped road or rail noise at all — though that reflects major-source modelling, not guaranteed quiet. The highest modelled level we found is at BN7 2DD (road noise 70.0–74.9 dB by day).
- Where is the most road noise in Lewes?
- The postcodes with the highest modelled daytime levels in and around Lewes are BN7 2DD, BN7 2DE, BN8 5RL, based on DEFRA's 2022 model of major roads and railways.