The Best Time of Day to Drink Coffee

If you’re like most people, your first instinct after waking up is to reach for a cup of coffee. But according to a video from the science YouTube channel AsapScience, that morning cup might not be giving you the boost you think — and there’s a much better time to drink it based on how your body naturally wakes up.

The best time to drink coffee is around 10 a.m. That’s when your cortisol levels — the hormone that helps you wake up — are lower, making caffeine more effective. Most people mistakenly drink coffee right after waking, when cortisol is already peaking.

Why Cortisol Matters for Coffee Timing

Cortisol is often called the “stress hormone,” but it also plays a key role in your body’s natural wake-up process. Your cortisol levels rise sharply after you wake up, increasing by about 50% regardless of what time you get out of bed. This natural spike helps you feel alert without any caffeine.

According to AsapScience, cortisol peaks at three key times during the day: between 8 a.m. and 9 a.m., again between 12 p.m. and 1 p.m., and finally between 5:30 p.m. and 6:30 p.m. Drinking coffee during these peaks means the caffeine has to compete with your body’s own alertness chemicals — reducing its impact.

When Should You Actually Drink Coffee?

Most people wake up between 6 a.m. and 7 a.m. That means your first cortisol peak hits around 8 a.m. to 9 a.m. — prime coffee time for many, but actually when you’re already feeling most alert naturally. Science suggests waiting at least one hour after waking before drinking coffee. For an average person waking at 7 a.m., that puts the optimal coffee time around 10 a.m.

At that point, your cortisol level has dipped from its morning spike, and your body can benefit more from the stimulating effects of caffeine. The result? You feel more awake, more focused, and get a better energy boost from your coffee.

What If You’re a Night Owl or Early Riser?

Your personal cortisol rhythm may shift depending on whether you’re a morning person or a night owl. Early risers might hit their cortisol peak earlier than 8 a.m., while late risers might experience it later. The general rule still applies: wait at least an hour after waking before drinking coffee, then reassess how you feel.

Rather than sticking rigidly to 10 a.m., pay attention to when you naturally feel most sluggish during the day. That’s often a better cue than the clock. But as a guideline, the hours when cortisol is lower — such as mid-morning after its first peak — are when coffee will have the biggest impact.

What Happens If You Drink Coffee at the Wrong Time?

Drinking coffee during a cortisol peak — such as right after waking (8–9 a.m.), around noon (12–1 p.m.), or in the late afternoon (5:30–6:30 p.m.) — means the caffeine has less effect. Your body doesn’t need the extra stimulation because it’s already producing enough cortisol to keep you alert. You might feel a slight boost, but it won’t be as strong as it could be, and you may build a faster tolerance to caffeine over time.

Frequently Asked Questions

What is the best time to drink coffee for maximum effectiveness?

The best time is around 10 a.m., when your cortisol levels have dropped from their morning peak (usually 8–9 a.m.). At this time, caffeine has a stronger effect because it isn’t competing with your body’s natural alertness hormones.

Why shouldn’t I drink coffee right after I wake up?

Right after waking, your cortisol levels spike by about 50%, making you feel more awake naturally. Drinking coffee during this peak (usually 8–9 a.m.) means the caffeine is less effective because your body doesn’t need the extra stimulation.

How long should I wait after waking up to drink coffee?

You should wait at least one hour after waking before drinking coffee. For most people who wake around 7 a.m., that means around 10 a.m. is the optimal time.

Does cortisol peak more than once a day?

Yes, cortisol peaks three times a day: between 8 a.m. and 9 a.m., 12 p.m. and 1 p.m., and 5:30 p.m. and 6:30 p.m. Drinking coffee during these times reduces its effectiveness.

What if I’m an early or late riser? Does that change the best coffee time?

Yes. Your individual cortisol cycle may shift. Early risers may hit cortisol peaks earlier, while late risers may experience them later. The one-hour-after-waking rule still applies, but your ideal coffee time may differ slightly from 10 a.m.

Can drinking coffee at the wrong time make me more tired?

Not directly, but drinking coffee during a cortisol peak means you get less stimulation from the caffeine. Over time, you might feel like you need more coffee to get the same effect, leading to faster tolerance and potential energy crashes later.

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