M25 Weekend Closures: What’s Happening in March 2025?
If you rely on the M25 in Surrey, brace yourself. In March 2025, National Highways will shut down both directions of the M25 closures for major improvements at Junction 10 (Wisley Interchange) and Junction 11 (Chertsey). This isn’t just a late-night lane closure—think empty motorway in both directions for two whole weekends, with knock-on effects for tens of thousands of drivers.
The first big closure lands Friday, March 7 at 9pm, running nonstop until 6am on Monday, March 10. Everything between J10 and J11 will be off-limits. But if you’re heading northbound on the A3 from J10 towards Painshill, you’ve got one last pass—this stretch stays open this weekend. The second closure comes just two weeks later, March 21 to 24. This time, the A3 northbound between J10 and Painshill will also shut, making things even more complicated. Crews will be knocking down the old gyratory system, a key piece of the project.
Why These Closures, and What’s Changing?
The M25 plays a central role in southern England’s road network—around 200,000 vehicles travel through this section daily. It’s a known headache at the Wisley Interchange, with bottlenecks and long delays all too common, especially during rush hours. This £15 million project is more than just resurfacing—the whole idea is to replace the outdated central gyratory at J10 with a modern traffic-flow system, making it less of a stress point for drivers heading to the A3 or looping around London.
The March closures are only the most visible moments. After those weekends, more work will hit the A3. Expect another full closure northbound from Junction 10 to Painshill between April 11 and 14. On top of that, several slip-road shutdowns at J10 are planned through early spring, each one set to shake up the usual driving routine. All this is mapped out as part of a wider schedule, and the ultimate goal is to wrap everything up by summer 2025.
National Highways says diversion routes will be marked and real-time updates posted online, but let’s be realistic: anyone in the area—commuters, delivery vans, airport hoppers—should get ready for longer journeys and possible gridlocks on all the usual detour roads. It makes sense to check road updates before leaving home, or even better, plan an alternative route altogether if possible. The silver lining? When all’s done, the hope is the new system will finally unclog one of the M25’s worst pinch-points. But for now, drivers have some traffic pain on the horizon.
May, 15 2025