Posted by Peekaboo Baby on 3rd Jun 2026
What TOG Does My Baby Need? The Australian Winter Sleep Guide
The temperature drops, your baby's bedroom gets colder, and suddenly you're wide awake at 2am wondering if they're warm enough. Every Australian parent knows this feeling. The good news: you don't need to guess. That's exactly what TOG ratings are for.
Australian winters are tricky - Melbourne can hit 8 degrees overnight, Sydney stays milder, and Queensland barely dips below 14. There's no single answer, but there is a simple formula for getting it right every night. This guide covers everything you need to know.
What Is a TOG Rating?
TOG stands for Thermal Overall Grade - it's a standard measure of thermal resistance used for bedding and baby sleepwear across Australia, New Zealand, and the UK. The higher the TOG number, the more warmth the item provides.
For baby sleeping bags and sleep suits, you'll typically see these values:
| TOG Rating | Warmth Level | AU Room Temp Guide |
|---|---|---|
| 0.2 TOG | Ultralight | 27 degrees and above |
| 0.5-1 TOG | Light | 22-27 degrees |
| 1.5-2 TOG | Medium | 18-22 degrees |
| 2.5 TOG | Warm | 16-20 degrees |
| 3.5 TOG | Extra warm | Below 16 degrees |
Note: These are general guidelines. Always check your room's actual overnight temperature - not just the weather forecast.
Which TOG Do I Need for Australian Winter?
Australia doesn't have a standard "winter TOG" because bedroom temperatures vary enormously. A family in Brisbane in June will sleep at 20+ degrees with good insulation; a family in a drafty Melbourne terrace might see 14 degrees in the same room.
The rule is simple: measure the room, not the season.
- Below 16 degrees: 3.5 TOG sleep suit or 2.5 TOG sleeping bag plus a long-sleeve onesie underneath
- 16-20 degrees: 2.5 TOG sleeping bag with a long-sleeve bodysuit
- 20-22 degrees: 1 TOG sleeping bag with a short or long-sleeve bodysuit
- Above 22 degrees: 0.2 or 0.5 TOG bag, light bodysuit only
Practical tip: Get a cheap digital thermometer for the nursery
Room temperature fluctuates during the night. A room that's 22 degrees at bedtime can drop to 16 degrees by 3am in Melbourne winter. A small digital thermometer on the dresser tells you what the room actually did overnight - not what you guessed at 7pm.
Sleeping Bag vs Sleep Suit: What's the Difference?
Both are rated in TOG, but they work differently.
Sleeping bags are wearable sacks - your baby's arms are free but their legs and body are enclosed. They're safe alternatives to loose bedding (which isn't recommended for babies under 12 months). Most parents transition to sleeping bags around 4-6 months when the swaddle phase ends.
Sleep suits are full-body pyjama-style garments rated in TOG - so the warmth comes from the suit itself rather than a separate bag. These are popular for babies who roll, crawl, or have outgrown a standard sleeping bag and want to move freely in bed. Some parents layer both a long-sleeve onesie under a sleep suit for extra-cold nights.
Swaddle bags add the TOG warmth plus a swaddling function for newborns. At the newborn stage, many parents use a 1 TOG or 2.5 TOG swaddle bag instead of loose swaddle wraps - it contains the startle reflex AND keeps the room temperature comfortable.
Our Pick: ergoPouch for Australian Winters
ergoPouch is an Australian brand designed specifically for Australian temperature ranges. Their TOG ratings are calibrated for our climate - not European or US winters - which is why they're a consistent parent favourite here.
ergoPouch Organic Sleep Suit Winter 3.5 TOG
For rooms below 16 degrees. OEKO-TEX certified 100% organic cotton jersey, two-way zip, fold-over cuffs to double as mittens in the coldest weather. Available in Berries + Night Sky colourways.
Shop the Sleep Suit 3.5 TOGergoPouch Organic Cotton Padded Sleep Onesie 2.5 TOG
For rooms 16-20 degrees. Padded-panel design keeps core warmth without overheating the face or neck. 100% organic cotton outer, 85% organic cotton fill. Grows with your toddler through multiple size ranges. OEKO-TEX certified.
Shop the Padded Sleep Onesie 2.5 TOGergoPouch ergoCocoon Swaddle Bag 1 TOG
For newborns in rooms 20-22 degrees. Adjustable wings contain the startle reflex while the TOG-rated jersey bag regulates temperature. Converts to a standard sleeping bag as your baby outgrows the swaddle phase. Organic cotton jersey.
Shop the ergoCocoon 1 TOGLayering for Extra-Cold Nights
On the coldest nights, layering is the safest and most effective approach. The key is to add warmth to the body without adding anything loose to the sleep space.
- Layer 1: Long-sleeve organic cotton onesie or bodysuit (directly on skin)
- Layer 2: TOG-rated sleeping bag or sleep suit on top
- Optional: ergoPouch ergoArms organic arm warmers - these slip over the arms under a 1 or 2.5 TOG bag to add warmth without the safety risks of loose sleeves
ergoPouch ergoArms - Organic Arm Warmers
A clever winter hack: 100% organic cotton jersey tube sleeves that layer under a sleeping bag to warm your baby's arms without adding loose clothing. Compatible with ergoPouch sleeping bags and most standard bags. One size fits most 3-24 month babies.
Shop ergoArmsCommon TOG Mistakes Australian Parents Make
- Dressing for the forecast, not the room: The overnight low might be 8 degrees outside, but a well-insulated apartment stays at 18. Measure your actual room temperature.
- Using the 3.5 TOG on a "just in case" basis: Overheating is a risk too. If your room sits at 20+ degrees with heating on, a 3.5 TOG bag is too warm. Signs of overheating include sweating, flushed cheeks, and a damp neck.
- Adding loose blankets or extra layers inside the cot: The Australian Department of Health recommends against loose bedding for babies under 12 months. TOG-rated sleeping bags are the safe alternative.
- Buying only one TOG rating: Many Australian parents find they need two - one for milder autumn/spring nights (1 TOG) and one for winter (2.5 or 3.5 TOG). Temperatures in the nursery can swing 10 degrees between seasons.
Frequently Asked Questions
Melbourne bedroom temperatures in winter typically fall between 14 and 19 degrees overnight. A 2.5 TOG sleeping bag with a long-sleeve onesie underneath suits most Melbourne winter nights. For particularly cold periods (14-16 degrees or below), add ergoArms or layer a long-sleeve bodysuit under a 3.5 TOG sleep suit.
A 3.5 TOG is only appropriate when the room temperature drops below 16 degrees. If your home has central heating, reverse-cycle air conditioning running overnight, or your nursery sits above 18 degrees, a 2.5 TOG will serve you better. Always check the room thermometer rather than assuming a high TOG is "safer."
Not recommended - layering a sleeping bag over a swaddle creates too much fabric in the sleep space and can cause overheating. Instead, choose a combined swaddle bag (like the ergoPouch ergoCocoon) that provides the TOG rating and swaddle function in one safe garment.
Most parents use sleeping bags until around 2-3 years old. When your child can safely step out of a cot, climb, or if they are actively trying to escape the bag at night, it may be time to transition to a junior quilt. The ergoPouch Sleep Suit range caters to toddlers who want to move freely but still benefit from TOG-rated warmth.
Yes - in most cases. Sydney winters are milder, with average overnight temperatures around 8-13 degrees outside, but well-insulated homes often sit at 18-20 degrees. A 1-2 TOG is typically enough for Sydney winters. Melbourne homes regularly see 14-17 degrees overnight, making a 2.5 TOG more appropriate. Always defer to what your room thermometer actually reads.
Ready to find the right TOG for your nursery?
Browse the full ergoPouch sleeping bag and sleep suit range at Peekaboo Baby - curated for Australian winters, with genuine stock and fast delivery.
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