The morning after is one of the most common ways Croatian drivers end up over the limit. Your body clears alcohol at a steady, slow rate of roughly 0.1 – 0.15 ‰ per hour, and nothing speeds that up. If you finished the night around midnight at about 1.2 ‰, you can still be above the 0.5 ‰ legal limit at 8 am the next morning — even after a full night's sleep, a hot shower, and a strong coffee. Sleep, caffeine, and a big breakfast may make you feel sharper than you are, but they do not lower your BAC.
For drivers under 24, anyone in the first two years after passing their test, professional drivers, motorcyclists, and instructors, the limit is 0.0 ‰ — so residual alcohol from the night before is still an offence. Use the SmartBAC calculator to estimate roughly when your BAC should be back to zero, then add a buffer of 1 – 2 hours because clearance varies between people, and if you are anywhere near the limit, do not drive. Croatian police checkpoints (česte kontrole) operate at any hour, including early mornings.