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Does Newhaven flood? 90 postcodes in Newhaven are in the Environment Agency's rivers-and-sea flood-risk data (35 High, 37 Medium likelihood) — the breakdown is further down this page.
No official flood warning is active nearby and the closest river stations are within normal ranges.
Updated 2026-10-10 04:45:06 UTC · Official GOV.UK warnings · Flood preparation & help guide
Newhaven is a port town in the Lewes district of East Sussex, England, lying at the mouth of the River Ouse.
Ordnance Survey places 90 postcodes in Newhaven in the Environment Agency's rivers-and-sea flood-risk dataset (Risk of Flooding from Rivers and Sea). Each postcode is counted once, under the worst band any of its properties reaches; together they hold 1,490 properties in the EA dataset's likelihood bands.
| EA likelihood band | Postcodes (worst band) | Properties in the EA dataset | of which homes |
|---|---|---|---|
| High | 35 | 332 | 119 |
| Medium | 37 | 936 | 506 |
| Low | 17 | 221 | 185 |
| Very low | 1 | 1 | 0 |
| All bands | 90 | 1,490 | 810 |
This dataset covers flooding from rivers and the sea only — one of five flood sources. Surface water, groundwater, sewers and reservoirs are assessed separately, so a postcode missing from it is not proof that a place cannot flood. The band describes the land around properties (allowing for defences), not any single address and not today's conditions.
Flood-risk bands: © 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.
Place names: Contains OS data © Crown copyright and database rights 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026. Contains National Statistics data © Crown copyright and database right 2026. Licensed under the Open Government Licence v3.0.
The nearest watercourse on the river map is the River Ouse (Newhaven Harbour) (tidal here), about 50 m from the middle of Newhaven's gauges.
A gauge downstream shows water that has already passed this point; one upstream sees it first. Distances along the river are from the point on the River Ouse (Newhaven Harbour) nearest the middle of Newhaven's gauges. From Ordnance Survey’s river map (OS Open Rivers), which leaves out small streams, ditches and culverts, so a nearer one may exist. This describes where water goes on the map; it says nothing about flooding at any address. Contains OS data © Crown copyright and database rights 2026.
Newhaven is monitored by 1 Environment Agency river level station on the Tide, in East Sussex. Water levels are updated every 15 minutes, providing real-time flood monitoring for the area.
The Tide is monitored by 1 station (Newhaven). Each station records water levels continuously, with data synced to FloodRadar every 5 minutes.
There are 8 Environment Agency flood warning areas within 10km of Newhaven. When the EA issues a flood warning for any of these areas, it will appear on this page. These include: Newhaven including Avis Way Industrial estate, Newhaven Marina, the A26, A259, West Quay, Riverside North, Denton Island, and the east bank; Tidal areas of Newhaven including Newhaven Marina, West Quay, Riverside North, Denton Island, and the East bank; Coastal areas of Seaford seafront including The Esplanade, areas behind and near the Martello Tower, Buckle Caravan and Camping Park and Salts Recreation Ground; Coastal areas of Seaford seafront including The Esplanade, areas behind and near the Martello Tower, Buckle Caravan and Camping Park and Salts Recreation Ground.
There are 7 storm overflows within 5km of Newhaven. None of the 5 with a reporting monitor are currently discharging (2 have no live status right now). Enable "Sewage" on the map above to see their locations.
6 of them, nearest first, with their own page of live status and past discharges:
If flooding is forecast in Newhaven, call Floodline on 0345 988 1188 for the latest information. Move valuables upstairs, turn off gas and electricity if safe to do so, and avoid walking or driving through flood water. Sign up for flood warnings on any station page above to receive email alerts when water levels rise. For emergency numbers, a preparation checklist and insurance guidance, see our flood help & preparation guide.
Newhaven gets about 807 mm of rain a year on average (wettest month November, 103 mm; driest April, 44 mm). That is 31% drier than the UK as a whole, which averages 1,163 mm a year. See the rain gauges →
A thirty-year average for the area, not a forecast and not a flood risk on its own. Source: Met Office HadUK-Grid 1991–2020 (5 km grid), 3.4 km away. Average rainfall: HadUK-Grid v1.3.2, Met Office. Contains public sector information licensed under the Open Government Licence v3.0.
Floods whose mapped extent (EA Recorded Flood Outlines) reached within ~5 km of the town centre — most recent first. These are records of mapped extents, not a full list of floods. See them on the map →
Records, not floods: no outline on the record is not evidence a place has not flooded.
Current verdict: Normal. No official flood warning is active nearby and the closest river stations are within normal ranges.
Newhaven has river level monitoring on Tide — 1 monitoring station in total.
Use the GOV.UK Check for Flooding service (check-for-flooding.service.gov.uk) or call Floodline on 0345 988 1188 (24 hours). You can also set up free FloodRadar email or browser alerts from any station page above.
Follow official advice: move valuables and vehicles to safety, never walk or drive through flood water, turn off gas and electricity if safe, and check on vulnerable neighbours. See our flood preparation guide at floodradar.co.uk/flood-help.
No recorded flood outline is mapped around the Newhaven town centre means no flood was mapped here, which is not evidence none happened: the Environment Agency mapped only some floods, mapping effort rose sharply after about 2000, and surface-water flooding is largely absent from this record. FloodRadar has separately logged 10 flood warnings or alerts for the East Sussex area since February 2026. See the flood history link below.
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