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Last update: 21:00, 5 Oct 2026
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Seaford sits on the East Sussex coast between Newhaven and the chalk cliffs of Seaford Head, with the Cuckmere valley opening onto the sea nearby. The open seafront and the exposed clifftop both catch weather coming straight off the Channel, while the town behind the promenade sits more sheltered. That is the situation a live Seaford rain radar handles well: hyperlocal radar reads the cell over your street, not the average for the region.
Seaford's open seafront and the chalk cliffs above it give a hyperlocal shower nothing to slow it, so a band blowing in off the Channel can reach the promenade before it climbs the slope to Seaford Head. Frontal rain reaches the south coast up the English Channel from the south-west, and the Isle of Wight, the Downs and the coastline split bands as they move east. Warm sea in autumn adds energy to showers, which can build quickly along the shore while inland areas stay dry.
RainViewer shows Seaford, England, on a live weather map fed by the Met Office radar network, so the precipitation you see is what is falling now. The live map shows whether a shower is still out over the Channel or already crossing Seaford seafront, which a forecast for Seaford cannot tell you.
Autumn and winter fronts and named storms bring rain and strong winds along the coast, and the seafront and the Cuckmere valley are the first areas affected. Atlantic depressions track along or across the Channel, and named storms bring heavy rain with strong winds and high seas. Seafront roads, ferries and coastal paths are affected first, and heavy rain on saturated ground raises flood risk in low-lying areas.
As fronts weaken, cold showers move across the coast, sometimes carrying hail. Because they are narrow and quick, forecasts struggle to keep up, and seafront events and spring outdoor plans carry the most exposure. Cold spring showers cross the Channel fast, and walks along the seafront and up to Seaford Head are the plans most often caught.
A cooler sea against warm land triggers sea-breeze storms, and thunderstorms drifting in from the continent add to them. The cell track decides beach days, festivals and air shows, because a storm can be over the seafront within minutes. Summer storms build along the coast, and beach days and walks out to the Cuckmere depend on gaps between showers.
The clifftop path out towards the Cuckmere valley and the Seven Sisters is fully exposed to weather coming off the Channel. Watch the cell approach before setting out from the town.
Seaford's shingle beach and promenade have little shelter, and a shower can empty it within minutes. Check the radar before heading down to the sea.
The walk out to the river mouth at Cuckmere Haven crosses open water meadows with no cover. See whether the cell will pass before setting out.
Seaford's high street has some cover from shopfronts, but the open crossings near the seafront catch a shower fast. A look at the radar shows whether the cell is heading in or has passed.
RainViewer shows UK precipitation using data from the Met Office, the national weather service, which runs a network of C-band dual-polarization weather radars. The Met Office network also feeds the European OPERA composite, and the RainViewer map refreshes with each new scan, about every 5 minutes. From Seaford the map also covers Newhaven, Eastbourne and Alfriston.
Seaford Head's clifftop path towards the Seven Sisters is fully exposed to weather coming straight off the Channel, so a shower there can soak walkers with little warning and no shelter nearby. Regular walkers keep an eye on the sky before setting out from town. RainViewer shows the cell approaching over the Channel before it reaches the cliff.
Yes, the route out to Cuckmere Haven crosses open water meadows and low ground that can flood after heavy rain, and the path offers no cover along the way. Check the radar before setting out from Seaford. Checking the map shows whether the cell is still to arrive or already past.
Seaford's seafront itself drains quickly, but the low water meadows around the Cuckmere valley just west of town can flood after heavy rain and hold water for some time. The high street on firmer ground stays clear. The map shows whether further rain is approaching.
May to September is the best window to visit Seaford, with the seafront, Seaford Head and Cuckmere Haven at their best. Storms in summer pass quickly. Check the radar first thing and plan the rest of the day around whatever dry gap it shows.
The clifftop at Seaford Head catches wind-driven showers coming straight off the Channel first, while the town centre, set back and lower behind the seafront, can stay dry a little longer under the same band. Live radar shows the edge of each cell, so checking Seaford Head and the town centre separately shows which side of the line you are on.
The short-range forecast for Seaford covers the next two hours in 5-minute steps, built from the same Met Office radar the live map uses. Met Office C-band radar over the south coast measures precipitation across the Channel as well as the land, showing an approaching band before it reaches the shore. That hyperlocal nowcast is far tighter than a general daily outlook.
Set a rain alert on Seaford Head or the seafront and RainViewer warns you before rain arrives, with hyperlocal detail a single Sussex coast forecast cannot give. The 2-hour forecast in 5-minute slices shows the next gap, and saved locations track Newhaven and Eastbourne together.
A walk up Seaford Head and a stroll along the seafront both depend on a dry gap, and RainViewer shows the next one.
Seaford feels rain move up the Channel from the south-west, with the coastline shaping how the band arrives.
Your phone forecast says showers in Seaford this evening. RainViewer's live street level radar shows the cell still out over the Channel with the seafront still dry, which decides whether the clifftop walk starts now.
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Two hours of 5-minute steps let you time the walk up Seaford Head to the minute.
Put an alert on Seaford seafront. RainViewer warns you minutes ahead, which settles whether to start the clifftop walk or wait it out.
Rain reaches Seaford most often from the south-west, up the English Channel, so the arrows tell you at a glance whether a cell is heading your way.
The 48-hour history shows what fell on the Channel off Seaford, which is the fastest way to judge ground conditions.
Save Seaford Head, the seafront and Cuckmere Haven and check all three in one look.