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Last update: 21:00, 5 Oct 2026
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Rain in Cobham: What You Need to Know
Cobham sits on the River Mole in Surrey, a well-off commuter village close to the M25 with the ornamental grounds of Painshill Park on its edge. Rain here arrives in bands from the south-west or builds as summer storms over the warm Surrey countryside, and the Mole can rise quickly after heavy rain further upstream near the North Downs. Pulling up a Cobham rain radar clears this up quickly, as hyperlocal radar shows the rain's real position rather than a general outlook.
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 North Downs to the south lift rain that then drains north through the Mole valley towards Cobham, so heavy rain on the hills can raise the river through the village even on an otherwise dry day.
The radar map covering Cobham, England, draws directly on Met Office data, refreshed about every 5 minutes as new scans arrive. The live map shows whether rain is falling on the North Downs upstream or is still building locally over Cobham.
Rain by Season in Cobham
Autumn and winter frontal season (October to January)
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. Frontal rain arrives in repeated bands through autumn and winter, and the River Mole through Cobham rises fast after heavy rain on the North Downs upstream.
Transition months (February to April)
Cold showers, hail and sun alternate in spring, and walks around Painshill Park's lake and grounds are the plans most often caught out. 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.
Summer storm season (May to September)
Summer storms can build over the warm Surrey countryside and catch outdoor plans within minutes. 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.
Why You Need a Rain Radar in Cobham
Visitors to Painshill Park
Painshill Park's ornamental grounds and lake on the edge of Cobham are largely open-air. Watch the shower approach on the radar and decide whether to start the visit or wait.
Walkers and anglers along the River Mole
The Mole through Cobham can rise quickly after heavy rain on the North Downs upstream, even while the village itself stays dry. Check the radar over the wider catchment before heading down to the water.
Commuters on the M25 and A3
The M25 and the A3 near Cobham slow in heavy rain, and spray builds fast where traffic bunches at the junctions. Check the map and weigh up leaving now against waiting for the gap.
Golfers at Cobham's courses
The golf courses around Cobham are fully exposed, and a summer storm can build over the countryside and reach them within the hour. Check the radar before teeing off.
RainViewer Radar Coverage in Cobham
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 Cobham the map also covers Esher, Leatherhead and Weybridge.
Cobham Rain Radar: Frequently Asked Questions
- How does rain on the North Downs affect the Mole at Cobham?
Heavy rain on the North Downs south of Cobham can raise the River Mole through the village quickly, sometimes while the sky over Cobham itself has already cleared. Anglers and walkers along the riverbank watch the hills rather than the local forecast. RainViewer shows where rain is still falling upstream.
- Does rain affect the M25 near Cobham?
Yes, the M25 and the A3 near Cobham slow in heavy rain, and spray builds fast where traffic bunches at the junctions. Check the live radar before setting off. A look at the map shows whether the cell has passed or is still on the way.
- Does Cobham flood when it rains?
Yes, the River Mole through Cobham can rise quickly after heavy rain on the North Downs upstream, and low ground near the riverbank is the most exposed. Higher parts of the village usually stay clearer. The radar shows whether heavy rain is falling on the hills to the south.
- When is the best time to visit Cobham to avoid rain?
May to September is the best window to visit Cobham, with Painshill Park and the Mole riverside at their best. Summer storms can still build quickly over the countryside. Look at the radar early and plan outdoor time around the gap.
- Why can it rain on Painshill Park while the Mole riverside stays dry around Cobham?
Painshill Park's open grounds on the edge of Cobham catch an approaching shower first, while the Mole riverside a short walk away can rise later, after rain further upstream on the North Downs has had time to drain down. Live radar shows the edge of each cell, so checking Painshill Park and the Mole riverside separately shows which side of the line you are on.
- What does RainViewer show for Cobham that a forecast percentage does not?
A forecast percentage for Cobham gives one number for the whole area, while RainViewer shows the actual shape and position of the rain on the map. Because London's worst flooding comes from short convective downpours rather than steady frontal rain, Met Office dual-polarization radar earns its keep here by telling the two apart before underpasses and stations start to flood. That hyperlocal, live picture is what lets you judge a specific street rather than the whole town.
- What can I do with RainViewer in Cobham beyond checking current rain?
Set a rain alert on Painshill Park or the Mole riverside and RainViewer warns you before rain arrives. That lets you time a visit or a walk. The 2-hour forecast in 5-minute slices shows the next gap, and saved locations track Esher and Leatherhead together.
Track Rain in Cobham in Real Time
A visit to Painshill Park and a walk beside the Mole both depend on a dry gap, and RainViewer shows the next one.
Rain around Cobham can turn into a downpour within minutes, so a quick radar check first is worth it.
Your phone forecast says rain in Cobham this afternoon. RainViewer's live hyperlocal radar shows the cell still building locally with Painshill Park dry, which decides whether the visit starts now.
Track rain in Cobham — free Upgrade to Essential for alerts, forecasts, and full radar history
2-hour forecast in 5-minute slices
The 5-minute steps show whether the walk beside the River Mole fits inside the dry gap.
Rain alerts before arrival
Set the alert at Painshill Park, and the warning arrives in time to decide whether to head down to the riverbank now or wait.
Direction arrows on the map
Storms usually arrive from the south-west over Cobham, and the arrows show which way each cell is moving.
48 hours of radar history
Check the North Downs upstream in the last 48 hours to see how much rain came down.
Multiple locations
Keep Painshill Park, Esher and Leatherhead on the same list, each with its own alert.
RainViewer
