Set the alarm clock for 8:18 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 8:16 am Alarm clock for 8:17 am Alarm clock for 8:19 am Alarm clock for 8:20 am

Going to bed for a 8:18 am alarm

Asleep by 11:03 pm — 6 full sleep cycles, about 9 hours
Asleep by 12:33 am — 5 full sleep cycles, about 7 hours
Asleep by 2:03 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.

8:18 am across the country

London	8:18 am
Birmingham	8:18 am
Manchester	8:18 am
Glasgow	8:18 am
Belfast	8:18 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 watch the clock for the moment to leave on your rock-pool hunt, an 8:18 am alarm keeps the departure from drifting. It gives you time to gather a small bucket, waterproof shoes and a towel without repeatedly checking the screen. The alert also leaves 42 minutes before 9:00 am, a useful reference if that round hour marks another part of the morning.

Your choice of sound should match the setting around this particular departure. A gentle tone can work when you are waiting quietly with the phone nearby, while a more persistent sound suits a busy kitchen or a hallway full of people getting ready. Set the volume before relying on it, and keep the alarm page available. Your rock-pool hunt could start late if the page is closed, and the alert may remain silent when the phone has gone to sleep.

Getting ready for the shore early in a British morning can mean stepping from warm indoor air into cool, damp conditions. Moisture may settle on paths, rocks and railings even when rain is absent, so footwear with reliable grip belongs near the door. A light outer layer also helps with the humid sea air, and it can be packed away if the morning becomes milder after 8:18 am.

Common questions

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 8:18 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.

Do I need an account or an app?

Neither. Choose a time and a sound, press Start, and it runs in this browser tab. Nothing is downloaded, nothing is registered, and closing the page leaves nothing behind on the device.