Why Does My 6-Month-Old Wake Up Every 2 Hours?

A 6-month-old who wakes every two hours is almost always linking sleep to something they can’t recreate on their own — usually feeding, rocking, or a pacifier — and calling for you each time they surface between sleep cycles. It’s developmentally normal, it’s not a sign you did anything wrong, and it’s one of the most fixable sleep problems at this age.

Here’s what’s actually happening. Around 4 months, babies shift from newborn sleep into mature, cycled sleep. Every 60 to 120 minutes they rise into a light stage and briefly wake — adults do this too, we just roll over and forget it. Your baby does the same thing, but if they fell asleep in your arms and wake up alone in a crib, that surface becomes a full wake-up. They’re not being difficult. They’re checking whether the conditions have changed.

The three things I look at first, in this order:

How they fall asleep at bedtime. Whatever gets your baby to sleep at 7pm is what they’ll ask for at 11pm, 1am, and 3am. This is the single biggest lever, and it’s usually the only one that needs to move.

Whether the day is set up to support the night. At 6 months, most babies do well on wake windows of about 2 to 3 hours and 3 naps, with roughly 3 to 3.5 hours of total day sleep. Overtired babies wake more, not less — an overtired baby produces more cortisol, which fragments the night.

Whether they’re getting enough calories during the day. Babies who under-eat between 7am and 7pm will genuinely make it up overnight. Sometimes the fix is daytime, not nighttime.

What I’d skip: adding rice cereal to the bottle, dropping naps to tire them out, or waiting it out because it’s a phase. At 6 months this pattern doesn’t usually resolve on its own — it consolidates.

If you’d like a plan built around your baby’s actual schedule and your family’s comfort level, I work with families in Skokie, Evanston, Wilmette and across the Chicago area, and virtually with families nationwide — in English and in Spanish.