In short

To sleep better in perimenopause you need to work with the two hormones disrupting it: falling progesterone (your natural calming hormone) and unpredictable cortisol spikes that leave you wired but tired at bedtime and wide awake at 3am. According to Sarah McLachlan, The Perimenopause Naturopath (BHSc Naturopathy), sleep is fixable at this age - but the old “just have an early night” advice isn’t how.

In this post:

• Why perimenopause wrecks sleep: progesterone, cortisol, and the second wind
• What poor sleep does to your weight, brain, and hormones (why this is worth fixing first)
• Your better-sleep plan: tonight, this week, and for good
• Waking at 3am: what it means and what actually helps

I see you there, contemplating the ceiling fan and about ready to sell your soul for a decent night’s sleep. Is there anything more frustrating than not being able to fall asleep - or stay asleep - after a long day of running around after everyone else?

“Without enough sleep, we all become tall two-year-olds.” - JoJo Jensen

Why can’t you sleep in perimenopause?

Two hormones are behind most perimenopausal sleep problems. Progesterone, nature’s calming hormone, helps you relax, fall asleep, and stay in deep sleep - and it’s the first to decline in perimenopause. Meanwhile cortisol, your stress hormone, starts spiking unpredictably, which makes it harder to wind down and can snap you awake at 2 or 3am.

That’s the biology behind the “second wind”: you’re crashing by mid-afternoon, scraping yourself off the couch at a reasonable bedtime… and then suddenly you’re vacuuming the curtains at 11pm. That last-minute surge of stress hormones is real, and it’s fixable.

What does poor sleep actually do to you in your 40s and 50s?

Short version: there isn’t a single hormone in your body that goes unscathed when you’re deprived of sleep. Poor sleep raises stress hormones and anxiety, fogs your memory (your brain consolidates the day while you sleep), increases hunger hormones, appetite and cravings, worsens insulin resistance (which makes your body cling to fat stores - exactly what you don’t need when fluctuating oestrogen is already making you more susceptible), suppresses thyroid function, and weakens immune defences.

This isn’t just about feeling tired. A 2026 clinical review in Menopause, the journal of The Menopause Society, notes that sleep disturbances including insomnia and sleep apnoea become more prevalent through the menopause transition, and that poor sleep quality worsens blood pressure, insulin resistance and inflammation. Shorter sleep and poorer sleep quality are linked to worse cardiovascular health specifically in postmenopausal women, which the authors describe as a menopause-specific vulnerability (Shufelt, Menopause, 2026). In other words: fixing your sleep in perimenopause isn’t a luxury. It’s one of the highest-value things you can do for your long-term health.

What is good sleep in perimenopause?

Aim for 7 to 9 hours - and quality matters as much as quantity. Good sleep looks like: falling asleep within 30 minutes, minimal waking overnight (unless a burglar or possum wakes you, of course), and waking refreshed. During the night you cycle through light sleep, deep sleep (your body’s repair shop) and REM sleep (your brain’s filing system) - deep sleep dominates early, REM comes in the second half of the night, which is why a short night steals disproportionately from your memory and mood.

How to sleep better tonight

Good sleep (like sex) is all about foreplay. What you do in the hours before bed decides how the night goes:

• Dim the lights after sundown - warm lamps or candles rather than bright overheads
• Warm (not hot) shower or bath; a few drops of lavender if you like it
• Book instead of screens - the blue light and the stimulation both work against you
• A dusk walk outside: evening light helps trigger melatonin
• Brain-dump the to-do list into a journal so your head doesn’t do it at lights-out
• Herbal tea to settle the nervous system
• Caffeine curfew: nothing after about 1pm. I know. I’m sorry, truly.
• Dinner 3 to 4 hours before bed, with protein, healthy fats and complex carbs - a blood sugar crash at 2am is a very effective alarm clock
• Bedroom: cool and ventilated, uncluttered, no TV, phone on flight mode, and an eye mask and earplugs if light or noise disturb you. The bed is for two things, and scrolling isn’t either of them.

And if you can’t sleep? Don’t panic and don’t lie there fighting it. Get up, read in another room for twenty minutes, try a sleep meditation or an audiobook. Even resting comfortably is doing your body good.

How to fix your sleep for good

• Sync with the light. Your circadian rhythm runs on light exposure: 20 minutes outside soon after waking (ideally well before 10am), catch the sunset when you can, warm low lighting after dinner.
• Bank an early night. Once a week, pick a quiet evening, be in bed by 9pm with 30 minutes of unwinding first. It resets your rhythm beautifully.
• Feed your magnesium stores. Dark leafy greens, almonds and seeds; an epsom salt bath before bed; talk to your practitioner about whether a quality magnesium supplement suits you.
• Support your progesterone. Because it’s your in-built sleep aid, everything that protects progesterone - managing stress load, eating enough (including some carbs, please), not over-training - protects your sleep.
• Treat stress as a body-wide load. Not just mental stress: alcohol, caffeine, under-eating, and chronic pain all count. Reduce the total, and cortisol settles.

Why do I keep waking at 3am?

The classic perimenopause pattern. In most of the women I see, the biggest cause is stress - a cortisol spike in the small hours snaps you out of your sleep cycle, sometimes with a racing heart. Blood sugar dips do the same thing (another reason dinner matters), and night sweats from fluctuating oestrogen add their own wake-ups.

When snoring is worth taking seriously

One thing that often gets missed: sleep apnoea risk rises in up to 11% of women after menopause, and higher again after surgical menopause (Shufelt, Menopause, 2026). If you snore, wake gasping, or feel unrefreshed no matter how many hours you get, that’s worth raising with your GP rather than filing under “perimenopause”. Treating it changes everything downstream - blood pressure, blood sugar, energy, and mood.

Sleep in perimenopause can be tough, but you don’t have to white-knuckle through years of 3am ceilings. If you’d like a plan built for your body - what to eat, drink, and do so sleep comes back - book a free Clarity Call and let’s find what’s keeping you awake.

Source: Shufelt CA. Cardiometabolic changes in the menopause transition. Menopause. 2026;33(5):608-610. The Menopause Society.