M25

M25 Traffic on Saturdays

On a Saturday the M25 serves days out rather than offices: Bluewater and Lakeside, the theme parks near Chertsey and Windsor, football grounds and family visits.

See how the latest Saturday moved through the day. Without the weekday peaks, the hours when shoppers and day-trippers set off and come home show up on their own.

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M25 on Saturdays: Saturday 17 October 2026

How traffic on the M25 has moved hour by hour, compared with the same day a week earlier (Saturday 10 October 2026) and with National Highways’ usual speed for each hour. Updated every five minutes.

Speeds are colour-coded the same way as our live M25 speed flow map: 50 mph and over, 30 mph to 49 mph, under 30 mph. The colour shows the speed actually achieved; the usual speed is shown in bold beside it.

11:00 (11am)

Clockwise · slowest hour against usual

average 58 mph across the road, against a usual 55 mph.

13:00 (1pm)

Clockwise · slowest stretch

J10–J11 12 mph, against a usual 54 mph.

16:00 (4pm)

Anticlockwise · slowest stretch

J8–J9 21 mph, against a usual 62 mph.

22:00 (10pm)

Anticlockwise · slowest hour against usual

average 62 mph across the road, against a usual 59 mph.

Across the day

Clockwise · stop-start

J30–J31 traffic below 15 mph somewhere on this stretch for about 70 minutes (1.17 hours), between 22:00 (10pm) and 00:00 (midnight).

Anticlockwise · stop-start

J24–J25 traffic below 15 mph somewhere on this stretch for about 105 minutes (1.75 hours), between 01:00 (1am) and 05:00 (5am).

Clockwise: average speed by hour

Anticlockwise: average speed by hour

Saturday 17 October 2026usual speed (National Highways)

How we worked this out. We regularly take National Highways’ live speed data for each stretch of the M25 and keep the average for each hour. These figures cover 24 hours of Saturday 17 October 2026 (we have no readings for Saturday 10 October 2026, so there is no week-earlier line yet). Hours are UK time. A speed shown for the whole road is the average across its stretches, so a short queue may not move it much: the cards point to the slowest stretches.

© 2026 Corporate Ace Limited. The analysis, wording, charts and conclusions on this page are our own, produced from the live information we collect, including National Highways’ data. You may not copy, republish or reproduce them on any website, app, broadcast or publication without our prior written permission, which must set out how and where they will be used. To ask, please contact us. Powered by National Highways’ Transport Data Feeds.

The M25 on Other Days

For the road right now, see the live M25 speed flow map and the latest M25 traffic news, or look up any junction on the M25 junctions page.