How to avoid a caffeine crash in the afternoon?

Keep your last coffee before 3pm and make sure your second coffee lands before the post-lunch dip starts, not after — timing avoids the crash better than cutting total intake does.

Caffeine Timing Cheat Sheet: When to Have Your Second Coffee

2 min readUpdated 2026-05-02

The short version

First coffee: 90 minutes after waking, not immediately.
Second coffee: 13:00-14:00, before the post-lunch dip starts, not after.
Cutoff: 6pm, full stop, unless you enjoy debugging your sleep at midnight.

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First coffee ~90 minutes after wakingCortisol is still elevated in that window — waiting lines caffeine up with its natural dip instead of stacking on top of it.
Second coffee between 13:00 and 14:00This is deliberately before the post-lunch energy dip starts, not a reaction to it — reacting to the crash means you're already behind it.
No third coffee after 15:00A 3pm-or-later coffee is the single most common cause of a caffeine-shaped hole in that night's sleep, even for people who claim caffeine 'doesn't affect' their sleep.
Hard cutoff at 18:005-6 hour half-life means anything after this is still meaningfully active at bedtime.

Most caffeine crashes aren't caused by too much caffeine — they're caused by bad timing. This cheat sheet is the timing half of the equation: when to have it, not how much.

The second-coffee slot (13:00-14:00) is the one people get backwards most often — reaching for coffee once the post-lunch dip has already hit means you're using caffeine to climb out of a hole instead of avoiding it. Move it earlier in that window and the dip is smaller to begin with.

Questions people actually ask

Between 1pm and 2pm, ahead of the typical post-lunch energy dip rather than in reaction to it — waiting until you've already crashed means using caffeine to recover instead of to prevent the dip.

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Caffeine Timing Cheat Sheet: When to Have Your Second Coffee

Questions people actually ask

Best time for second coffee?−

How to avoid a caffeine crash in the afternoon?+

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