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Last update: 21:00, 5 Oct 2026
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Rain in Croydon: What You Need to Know
Croydon lies on the northern slope of the North Downs in south London, with East Croydon station and the town centre in the valley and the Downs rising to the south. Rain arrives from the south-west across the Downs, and the ridge lifts it before it reaches the town. That is the situation a live Croydon rain radar handles well: hyperlocal radar reads the cell over your street, not the average for the region.
The North Downs lift showers as they cross to the south, so Croydon can see the band earlier than Central London, and the built-up town warms the air and builds summer cells over the centre. Frontal rain arrives from the south-west, but summer storms are the real forecasting problem. Heat trapped over the city and the Chilterns and North Downs steer and trigger cells, and drainage can be overwhelmed within minutes by a storm that a forecast rated as a chance of showers.
The radar map covering Croydon, England, draws directly on Met Office data, refreshed about every 5 minutes as new scans arrive. The live map shows whether a shower is over the Downs, on the Purley Way or already at Surrey Street, which a forecast for Croydon cannot tell you.
Rain by Season in Croydon
Autumn and winter frontal season (October to January)
Autumn and winter fronts bring steady rain over the Downs, and the Wandle and the Croydon streams run high after prolonged wet weather. Between October and January, one frontal band follows another, and named storms bring wind alongside the rain. The Thames and its tributaries respond to all that repeated rain by rising, with roads, rail lines and low-lying streets typically the first to be hit.
Transition months (February to April)
Cold showers, hail and sun alternate, and forecasts are least reliable because the showers are small and fast. Spring races, park events and weekend sport are the most exposed. Spring showers cross the Downs, and walks in Crystal Palace Park and Selsdon Wood are the plans most often caught.
Summer storm season (May to September)
From May to September, heat builds over the built-up area until thunderstorms break, producing short, intense rain that can flood roads and stations within minutes. Festivals, tennis and open-air events hinge on which way a storm cell tracks, which radar reveals before the sky itself does. Summer thunderstorms build over the warm urban ground, and open-air events in Croydon and at Crystal Palace depend on the cell track.
Why You Need a Rain Radar in Croydon
Crystal Palace fans at Selhurst Park
Fans walking to Selhurst Park from the stations cross open streets before kick-off. Check the radar for the next dry window and time the leave.
Tram and rail commuters at East Croydon
Tramlink stops are open-air, and the walk to East Croydon is exposed. Follow the shower on the radar and time the leave.
Surrey Street market shoppers
Surrey Street market is open to the sky. See whether the cell will pass and choose the gap.
Crystal Palace Park and Downs walkers
Crystal Palace Park and the North Downs paths are open-air with little shelter. Check the radar and decide whether to start the walk.
RainViewer Radar Coverage in Croydon
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 Croydon the map also covers Sutton, Bromley and Purley.
Croydon Rain Radar: Frequently Asked Questions
- How does rain affect match days at Selhurst Park?
Fans walk from Selhurst, Norwood Junction and Thornton Heath stations across open streets, and heavy rain turns the approach into a soak. Supporters and stewards watch the sky. RainViewer shows the shower crossing the Downs.
- Does rain affect the A23 and the trams in Croydon?
Yes, heavy rain slows the A23 Purley Way and the ring road, and standing water can hold up Tramlink at low points. Look at the map before setting off. A glance at the map shows whether the shower is behind you or still ahead.
- Does Croydon flood when it rains?
Croydon has flash flooding on low streets and underpasses when intense rain overwhelms the drains, and the Wandle rises after wet spells. Avoid flooded underpasses and dips in the road. The live radar picture shows whether a heavier cell is closing in.
- When is the best time to visit Croydon to avoid rain?
May to September is the best window to visit Croydon, with Crystal Palace Park, Surrey Street and the North Downs at their best. Summer downpours are brief. A morning radar check shows the clearest stretch for time outside.
- Why can it rain on the Downs while Surrey Street stays dry around Croydon?
The North Downs lift showers as they cross, so the ridge south of the town can be wet while Surrey Street in the centre stays dry until the band comes down the slope. RainViewer draws each shower where it actually is, which is why a look at the Downs and Surrey Street can give different answers.
- How does RainViewer's radar work in Croydon?
The Croydon radar in RainViewer uses Met Office data, updated every 5 minutes, to show precipitation as it falls rather than a modelled prediction. Met Office dual-polarization radars separate heavy convective rain from lighter frontal rain, which matters here because the intense summer downpours are the ones that flood underpasses and stations. That hyperlocal radar picture shows where a shower starts and stops, which a forecast cannot.
- What can I do with RainViewer in Croydon beyond checking current rain?
Set a rain alert on East Croydon or Selhurst Park and RainViewer warns you before rain arrives. That lets you time a match-day walk or a commute. The 2-hour forecast in 5-minute slices shows the next gap, and saved locations track Crystal Palace Park and Purley.
Track Rain in Croydon in Real Time
A match-day walk and a tram commute both depend on a dry gap, and RainViewer shows the next one.
Rain in Croydon arrives in bands from the south-west, and summer storms can appear within minutes.
Your weather app says rain in Croydon this afternoon. RainViewer's live hyperlocal radar shows the cell over the Downs with East Croydon still dry, and that decides when the match-day walk starts.
Track rain in Croydon — free Upgrade to Essential for alerts, forecasts, and full radar history
2-hour forecast in 5-minute slices
Two hours of 5-minute steps let you time the walk to Selhurst Park to the minute.
Rain alerts before arrival
Put an alert on East Croydon station. RainViewer warns you minutes ahead, which settles whether to leave for the ground now or wait.
Direction arrows on the map
Rain reaches Croydon most often from the south-west, so the arrows tell you at a glance whether a cell is heading your way.
48 hours of radar history
The 48-hour history shows what fell on the North Downs, which is the fastest way to judge ground conditions.
Multiple locations
Save East Croydon, Selhurst Park and Crystal Palace Park and check all three in one look.
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