Is it raining now in Egham?
Sunny
5 OctNo upcoming precipitation for the next hour.
Last update: 21:00, 5 Oct 2026
Free to download * Essential from $0.83 * Prices vary by region and promotions.
- App Only
Track up to 20 locations
Home, office, kids' school - all at once, no switching tabs.
- App Only
Alerts for each of them
Get notified 15 minutes before rain - while you can still change your plans.
- App Only
Widgets on your home screen
Live radar without opening the app - on your lock screen or home screen.
Rain in Egham: What You Need to Know
Egham sits on the Thames in Surrey, with Royal Holloway's Founder's Building above the town and Runnymede's water meadows stretching along the river towards Windsor. The Thames here floods its banks readily, and low ground near Egham Hythe is the first to feel a rise after rain on the upper catchment. Pulling up an Egham rain radar clears this up quickly, as hyperlocal radar shows the rain's real position rather than a general outlook.
Two separate mechanisms bring rain to London and the Thames Valley: frontal bands sweeping in from the south-west, and convective storms that build locally once the ground has warmed. The city itself adds heat on top of that, and the Chilterns and North Downs help steer and set off individual cells, so one part of town can be soaked while a neighbouring borough stays completely dry. Rain on the upper Thames catchment upstream of Egham can take a day or more to reach the town, so the river keeps rising at Runnymede and Egham Hythe well after the rain overhead has stopped.
RainViewer shows Egham, 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 gives a hyperlocal read on whether a shower is still over Windsor or already crossing Royal Holloway, which a forecast for Egham cannot tell you.
Rain by Season in Egham
Autumn and winter frontal season (October to January)
Frontal rain arrives in repeated bands, and named storms bring wind as well as rain. Repeated rain raises the Thames and its tributaries, and roads, rail and low-lying streets are affected first. Winter rain on the upper Thames raises the river through Egham, and the meadows at Runnymede are the first to go under water.
Transition months (February to April)
Cold spring showers cross Surrey quickly, and the walk across the water meadows to the Magna Carta memorials is the plan most often cut short. February to April swings between cold showers, hail and bursts of sun, and forecasting is at its least reliable because these showers are small and move fast. That leaves spring races, park events and weekend sport the most exposed to a sudden change.
Summer storm season (May to September)
Summer brings visitors to Runnymede and the riverside path, and the day depends on the gaps between short showers off the Thames valley. Between May and September, heat built up over the city triggers thunderstorms that dump short, intense rain, flooding roads and stations within minutes. For festivals, tennis and open-air events, the storm cell's track matters most, and radar shows that track before it appears in the sky.
Why You Need a Rain Radar in Egham
Royal Holloway students and visitors
The walk between the station and the Founder's Building crosses open ground with little cover once a shower starts. Check the radar before setting out across campus.
Runnymede meadow walkers
Runnymede's water meadows sit right beside the Thames and flood readily after heavy rain upstream. See whether the river is rising before heading out towards the memorials.
Thorpe Park visitors nearby
Families heading to Thorpe Park from Egham cross open roads with little shelter in a downpour. Watch the cell approach and decide whether to leave now or wait for a gap.
Commuters on the M25 and A30
The M25 near junction 13 and the A30 through Egham slow fast in heavy rain, and spray builds on the open stretches. The radar shows whether now is the moment to leave or wait it out.
RainViewer Radar Coverage in Egham
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 Egham the map also covers Staines-upon-Thames, Windsor and Chertsey.
Egham Rain Radar: Frequently Asked Questions
- How does rain affect a visit to Runnymede near Egham?
Runnymede's water meadows sit close to the Thames and can flood within hours of heavy rain further up the catchment, even when the sky over Egham itself has cleared. Visitors walking to the Magna Carta memorials are the first to feel the wet ground underfoot. RainViewer shows whether the river is still rising or the meadow path has firmed up.
- Does rain affect the M25 near Egham?
Yes, heavy rain slows the M25 around junction 13 and the A30 through Egham, and spray builds fast on the open stretches near Runnymede. Look at the radar before merging onto the road. Checking the map shows whether the cell is still to arrive or already past.
- Does Egham flood when it rains?
Yes, the Thames can flood the water meadows at Runnymede and low ground around Egham Hythe after heavy rain on the upper catchment, and the river can keep rising for a day or more after the rain has stopped. Royal Holloway and the town centre sit on higher ground above the worst of it. The radar shows whether rain higher up the catchment is continuing.
- When is the best time to visit Egham to avoid rain?
May to September is the best window to visit Egham, with Runnymede and the riverside path at their most pleasant. Showers are shorter in summer but the Thames valley still catches its share. Check the radar in the morning and plan the outdoor part of the day around the gap.
- Why can it rain on Runnymede by the Thames while Royal Holloway on higher ground stays dry around Egham?
The water meadows at Runnymede sit right beside the river and flood easily, while Royal Holloway's campus stands on higher ground above the flood plain and stays dry through the same wet spell. RainViewer draws each shower where it actually is, which is why a look at Runnymede by the Thames and Royal Holloway on higher ground can give different answers.
- How accurate is the Egham rain radar?
The Egham rain radar is as accurate as the Met Office scans behind it, which RainViewer refreshes about every 5 minutes. 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. Hyperlocal radar shows the actual edge of each shower rather than a probability for the whole town.
- What can I do with RainViewer in Egham beyond checking current rain?
Set a rain alert on Runnymede or Royal Holloway and RainViewer warns you before rain arrives, with a hyperlocal view down to street level. That lets you time a walk by the river or the drive to Thorpe Park. The 2-hour forecast in 5-minute slices shows the next gap, and saved locations track Windsor and Staines-upon-Thames together.
Track Rain in Egham in Real Time
A walk across Runnymede and a visit to Royal Holloway both depend on a dry gap, and RainViewer shows the next one.
Showers and storms cross Egham quickly, so timing shifts faster than a forecast updates.
A weather app says rain for Egham this afternoon. RainViewer's live hyperlocal radar shows the cell still over Windsor with Runnymede still dry, and that decides whether the walk to the memorials starts now.
Track rain in Egham — 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 across Runnymede fits inside the dry gap.
Rain alerts before arrival
Set the alert at Runnymede, and the warning arrives in time to decide whether to walk the water meadows or take the road.
Direction arrows on the map
Storms usually arrive from the south-west over Egham, and the arrows show which way each cell is moving.
48 hours of radar history
Check the upper Thames catchment above Egham in the last 48 hours to see how much rain came down.
Multiple locations
Keep Runnymede, Royal Holloway and Windsor on the same list, each with its own alert.
RainViewer
