Road & rail noise map for Seaford
Town in East Sussex, South East
We analysed 858 postcodes in and around Seaford, East Sussex against DEFRA's Strategic Noise Mapping (Round 4, 2022). 17% of them (146) have mapped road noise of 55 dB or more by day, and <1% have mapped rail noise. 83% 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 BN25 2AW (road noise 65.0–69.9 dB by day).
Noise map of Seaford
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 | 11% (98) | 3% (28) |
| 60.0–64.9 dB day · 55.0–59.9 dB night | 5% (44) | 4% (38) |
| 65.0–69.9 dB day · 60.0–64.9 dB night | <1% (4) | <1% (3) |
| 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 | 83% | 92% |
Rail noise
| Band | Day (LAeq,16h) | Night (Lnight) |
|---|---|---|
| 55.0–59.9 dB day · 50.0–54.9 dB night | <1% (1) | <1% (1) |
| 60.0–64.9 dB day · 55.0–59.9 dB night | 0% (0) | 0% (0) |
| 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 | 100% | 100% |
Share of the 858 postcodes within ~5 km of the Seaford centre. Source: DEFRA Strategic Noise Mapping Round 4 (2022), Open Government Licence.
Noisiest postcodes in and around Seaford
Check a specific postcode
Example searches: BN25 4BL · BN25 4FG · BN25 2AW · BN25 4BJ · BN25 1NP · BN25 1NT
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.
Bothered by road or rail noise at home?
Acoustic and secondary glazing typically cuts perceived traffic noise dramatically. We're building a free quote-matching service with vetted installers — leave your email and we'll contact you when it launches.
Nearby areas
Frequently asked questions
- How noisy is Seaford?
- We analysed 858 postcodes in and around Seaford, East Sussex against DEFRA's Strategic Noise Mapping (Round 4, 2022). 17% of them (146) have mapped road noise of 55 dB or more by day, and <1% have mapped rail noise. 83% 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 BN25 2AW (road noise 65.0–69.9 dB by day).
- Where is the most road noise in Seaford?
- The postcodes with the highest modelled daytime levels in and around Seaford are BN25 2AW, BN25 4FG, BN25 4BJ, based on DEFRA's 2022 model of major roads and railways.