Set the alarm clock for 6:40 am

Leave this tab open — the alarm only rings while the tab stays open.

The alarm goes off in: ::

You can also try the other alarm clocks

Alarm clock for 6:38 am Alarm clock for 6:39 am Alarm clock for 6:41 am Alarm clock for 6:42 am

Going to bed for a 6:40 am alarm

Asleep by 9:25 pm — 6 full sleep cycles, about 9 hours
Asleep by 10:55 pm — 5 full sleep cycles, about 7 hours
Asleep by 12:25 am — 4 full sleep cycles, about 6 hours

A sleep cycle runs about 90 minutes, and most people take around 15 minutes to drop off. Waking at the end of a cycle feels easier than waking in the middle of one.

6:40 am across the country

London	6:40 am
Birmingham	6:40 am
Manchester	6:40 am
Glasgow	6:40 am
Belfast	6:40 am

Times are worked out live in your browser, so daylight saving is already accounted for.

How to use the online alarm clock

While you wait to check the Met Office ice warning, set the alarm for 6:40 am and keep an eye on the current time. That gives you a defined moment to look at the latest information before 7:00 am, rather than repeatedly refreshing the forecast or becoming distracted by another early-morning task.

Keep this page open after setting the alarm and leave the browser running. Closing it cancels the alarm, and it will not sound if your phone or computer goes to sleep, so the Met Office warning could remain unchecked when you meant to read it. Keep the screen awake, confirm that the volume is audible, and avoid switching to a setting that silences browser audio while you wait.

A weather check at 6:40 am may happen while other people in the house are still asleep or only beginning to stir. Use a moderate volume, keep the phone close to you, and choose vibration as an additional cue if available. Once the alarm sounds, stop it promptly before reading the ice warning, especially if bedrooms are nearby and the household does not need to get up at the same time.

Common questions

Will it still be right when the clocks change?

Yes. It reads your device's local clock, so the move between GMT and BST at the end of March and October is picked up automatically, as long as the computer's date, time and time zone are set correctly.

Can I use this on a phone?

It works in a mobile browser, but phones lock the screen and suspend background tabs far more readily than a laptop does, which can stop the alarm sounding. For anything important, a desktop or a plugged-in laptop is the steadier option.

Does the alarm still work if I close the tab?

No. Everything runs inside this page, so closing the tab — or quitting the browser altogether — ends the countdown there and then. Leaving it open in the background is all it asks, and switching to another tab makes no difference.

What happens if my laptop goes to sleep before 6:40 am?

The tab sleeps along with it and the alarm will not sound on time, if at all. If you are relying on it, change the power settings so the machine stays awake, or keep a phone alarm running as well.