Twins Waking at the Same Time Every Night: 3 Causes

A twin who wakes at the same time every night is usually doing one of three things. They are hungry and still need that feed. They are surfacing between sleep cycles and cannot get back down alone. Or they are waking for a feed that has become a habit. The clock time alone will not tell you which. What happens after the wake will. With twins there is a step before that: work out whether it is one twin on the clock, both, or one twin waking the other. Whether a night feed is still needed is a pediatrician’s call, especially for twins born early.

First, whose clock is it?

“The twins wake at 3 every night” covers three different situations, and they need different fixes.

1. One twin wakes on the clock, and the other sleeps through. This is the simplest case, and the rest of this page is mostly about it.
2. One twin wakes on the clock, and the other wakes because of the noise. The second wake is a knock-on, not a habit of its own. Work on the room first, using the order in twins waking each other up. If the pair is in their second year and the waking looks deliberate, one twin waking the other on purpose is a different problem with different fixes.
3. Both twins wake on their own at the same time. Look for something that happens at that hour, such as heating switching on or early light round a blind, or a shared late feed that leaves both hungry at the same point.

Four or five nights of a per-twin log settles this: who woke first, when, for how long, and what got them back down. The A|B feeding and sleep log has a column for each.

The three causes, and how each one looks

Hunger: a feed that is still doing a job

What it looks like: a full, steady feed, then quick settling and deep sleep.

What the sources say: the NHS page on helping your baby to sleep says that from 3 to 6 months babies “need fewer night feeds and may be able to sleep for longer”. It adds that “some babies may sleep for 5 to 8 hours or longer at night, but not all.” For 6 to 12 months it says “night feeds may no longer be necessary” for some babies, and that “teething discomfort or hunger may wake some babies during the night.” Western Australia’s Department of Health puts it this way on its sleep page for 6 months to 3 years: “At 6 months a lot of babies are still waking for a night feed. By 12 months night feeds are no longer necessary.”

What to do: feed them. A hunger wake is not a problem to fix.

A sleep-cycle wake: surfacing and not getting back down

What it looks like: a short wake at roughly the same point after bedtime. Some nights the twin drops off again within minutes; other nights they need whatever got them to sleep at bedtime, such as a feed, a rock or you in the room.

What the sources say: the Healthy WA page describes this directly. Many babies “wake in the lighter time of sleep, just as we wake (or almost wake)”. They may turn over and go back to sleep, “or they may cry because they are uncomfortable, afraid or unsettled in some other way, or in the habit of waking up.” The AAP’s Getting Your Baby to Sleep page says “it is normal for a 6-month-old to wake up during the night and then go back to sleep after a few minutes”. It also advises against rushing in, because babies “need time to put themselves back to sleep.”

What to do: give that twin a minute before you go in, and keep your response small and the same each night. Steady white noise from a fan-based machine like the Yogasleep Dohm smooths over house noises and helps keep the co-twin asleep while you wait.

A learned feed: hungry for the routine, not the milk

What it looks like: a few sucks or a small part of a bottle, asleep before it is finished, and often a smaller first feed in the morning. The timing holds even when bedtime moved.

What the sources say: Healthy WA suggests encouraging your baby “to eat and drink well during the day, so that he does not need a night-time feed,” and notes that “if you cut down night feeds, your baby’s daytime appetite will increase.” It also suggests offering a feed “a little while before he usually wakes, for example about 10.00 pm without fully waking him up.” Betteroo’s guide to dropping night feeds gently is careful on this point. It says whether a feed is hunger or comfort “is individual”. It says to confirm growth with your pediatrician first, then reduce gradually by stretching the interval or trimming the feed, rather than cutting it all at once.

What to do: once your pediatrician agrees that twin no longer needs the calories, shrink the feed a little at a time.

The twin part: decide per baby, not per pair

Twins share a room, a routine and usually a feeding plan, so it is tempting to run one answer for both. That is where same-time waking gets stuck.

• The newborn rule has an end date. The AAP’s feeding twins on a schedule page gives the golden rule for the early weeks: “when one wakes up to eat, both must wake up to eat.” That is how two newborns end up on one clock. Months later, if one twin wakes at 3 out of habit and you feed both because you are up anyway, you may be building a second learned feed in the twin who was sleeping through.
• Each twin can be at a different stage. One twin can still need a 3 a.m. feed while the other is ready to drop it. Twins often grow at different rates, so ask the pediatrician about each baby by name.
• Born early changes the timeline. Run every comparison on adjusted age, counted from the due date. A pair born at 34 weeks is not yet doing six-month sleep at six months, as twins waking each other up explains. Preterm twins on a feeding plan from the NICU or the pediatrician stay on it until that clinician changes it.
• Work on one twin at a time. If both have a habit feed, change one baby’s night first, so you know which change did what.

When it is not a habit at all

A twin who starts waking at the same time after weeks of sleeping well, especially with a cold, a fever, feeding changes or signs of pain, needs a call to the pediatrician, not a habit plan. So does a twin who snores, gasps or has pauses in breathing. The full list, and what to bring to the appointment, is in six-month-old twins waking every two hours.

One plan per twin

Sorting three causes across two babies at 3 a.m. is a lot. Betteroo builds a sleep plan around one child’s age and temperament, so each twin gets their own plan instead of a compromise. It costs about $20 a month. It is a planning tool, not a medical one: whether a night feed is still needed is your pediatrician’s call.

Same clock, different reasons When one twin wakes at 3 every night and the other doesn't, one plan won't fit both. Betteroo's quiz builds a plan around one baby's age and temperament. Take the sleep quiz →

FAQ: twins waking at the same time every night

Why does my baby wake at the exact same time every night?

Usually hunger, a wake between sleep cycles, or a night feed that has become a habit. A full feed and quick, deep sleep suggest hunger; a short, sleepy feed and a smaller breakfast suggest habit. Ask your pediatrician before dropping any night feed.

Should I wake the other twin to feed when one wakes at night?

In the newborn weeks the AAP’s advice is to feed both, so they stay on one schedule. Later, if one twin’s wake is habit rather than hunger, feeding the sleeping twin too can build a second habit. Check each twin with your pediatrician.

When does same-time night waking need a doctor?

When it starts suddenly after a period of good sleep, or comes with illness, fever, breathing noises, pain, or feeding or weight worries. Those are reasons to call the pediatrician rather than treat the wake as a habit.