Why Do I Sleep Hot?Why You Sleep Hot on Your Period (and the Week Before)
By the Good Sleep team · October 22, 2026
Short answer: after ovulation, progesterone rises and nudges your body temperature up slightly. Cleveland Clinic notes this is why basal body temperature climbs in the second half of the cycle. Many people feel it as warmer, more restless nights in the week before a period. Cooling the bed for those nights helps.
The hormone pattern
In the first half of the cycle, estrogen leads. After ovulation, progesterone takes over and body temperature rises a little until your period starts. Then both hormones drop, which can bring its own temperature swings, sometimes with night sweats.
Why it feels worse at night
Your body needs to shed heat to fall and stay asleep. Starting from a slightly higher baseline means you hit "too hot" sooner, especially under a heavy duvet. Cramps, bloating and a heating pad don't help.
What helps
- Track it. Note which nights you run hot; for many it's the same few days each cycle.
- Use heat where you need it, then remove it. A heating pad for cramps is fine; take it out of the bed before you sleep.
- Drop the room a degree or two for that week.
- Lighter bedding and breathable sleepwear.
- Cool the sleep surface. Good Sleep's topper can be set to cool, and on a King each side is separate, so a partner isn't stuck at your temperature.
Good Sleep lists hormones among the main causes of sleeping hot on trygoodsleep.com. For a general plan, see sleeping cooler at night.
When to see a doctor
See a doctor if premenstrual symptoms seriously affect your sleep or mood, if periods become very irregular, or if heavy night sweats start in your late 30s or 40s, which can be an early sign of perimenopause.