Doona Warmth Rating Guide 2026: GSM by Climate

Doona warmth ratings tell you how much heat a quilt traps, and getting the rating wrong means a doona that either smothers you in July or leaves you cold in August. This guide ranks the four warmth categories Australian bedrooms actually need and tells you which one fits your climate, your bed, and your budget in 2026.

Why this matters

Most doona shopping goes wrong at the GSM stage, not the price stage. GSM (grams per square metre) measures fill weight, and fill weight is the single number that predicts how warm a quilt sleeps, regardless of what the packaging calls it.

Buy a 500 GSM doona for a Brisbane apartment and you'll wake up sweating by 2am in January. Buy a 250 GSM doona for a Hobart winter and you'll be reaching for a blanket by June. The InterContinental Hotels Quilt sits in the mid-weight band precisely because most Australian bedrooms sit between those two extremes.

The fix isn't buying the highest-rated doona you can find. It's matching GSM to your actual climate zone and swapping covers, not quilts, when the season changes.

What makes the best doona warmth rating

• GSM fill weight — the number that actually determines warmth, independent of brand names or marketing language
• Fill type — goose down, duck down, or down-alternative each trap heat differently at the same GSM
• Climate zone — northern Australia, temperate southern states, and alpine regions each need a different default rating
• Casing breathability — a cotton or cotton-blend casing lets a warmer doona breathe better than a synthetic one
• Bed layering — whether you'll pair the doona with a mattress topper or heavier sheet set changes the ideal GSM
• Allergy sensitivity — down-alternative fills matter more than GSM for sleepers with feather allergies

Doona warmth ratings at a glance

Warmth category	Best for	Standout feature	Starting price	Key limitation
Summer-weight (200-300 GSM)	Hot, humid Australian summers	Breathable, low-loft fill	Not listed	Too thin for southern winters
All-season (300-400 GSM)	Most Australian bedrooms year-round	Balanced warmth without overheating	$150 (InterContinental Hotels Quilt)	Runs light for alpine winters
Winter-weight goose down (400-500+ GSM)	Melbourne, Hobart and Canberra winters	High loft-to-weight ratio for real insulation	Not listed	Too warm for northern states most of the year
Down-alternative	Allergy-prone or asthmatic sleepers	Hypoallergenic fill at comparable warmth	Not listed	Slightly heavier per GSM than natural down

1. Summer-weight doona (200-300 GSM): best for hot Australian summers

A summer-weight doona uses a low fill weight so it breathes rather than traps heat, which matters most in Queensland, the NT, and northern WA where overnight temperatures rarely drop below the low 20s. The lighter fill also dries faster after washing, a real advantage in humid coastal climates.

Summer-weight doona pros:

• Stays breathable through hot, humid nights
• Lighter to wash and dries faster
• Pairs well with a lightweight quilt cover for warmer months

Summer-weight doona cons:

• Offers almost no insulation below 15°C
• Needs a full swap, not just a cover change, for winter

Verdict: Buy if you live north of the NSW border or in a climate that doesn't see a real winter. For seasonal layering ideas, the Australian summer quilt guide covers how to combine a lighter doona with sheet weight.

2. All-season doona (300-400 GSM): best all-round pick for Australian bedrooms

The 300-400 GSM band is the default rating for a reason: it covers the temperature swing most Australian capitals see across a year without needing a seasonal swap. The InterContinental Hotels Quilt sits at $150 and uses this mid-weight fill, which is why it works as a single-doona solution for households that don't want two quilts in the linen cupboard.

All-season doona pros:

• One quilt covers most of the year in temperate states
• Mid-weight fill balances warmth against breathability
• Priced at $150 for the InterContinental Hotels Quilt, a fixed cost rather than buying two seasonal doonas

All-season doona cons:

• Not warm enough for alpine winter nights without an added topper or blanket
• Not the coolest option for a Darwin or Cairns summer

All-season doona pricing: the InterContinental Hotels Quilt is $150.

Verdict: Buy as the default doona for most Australian bedrooms, then adjust with cover weight rather than replacing the quilt.

3. Winter-weight goose down doona (400-500+ GSM): best for cold southern states

Goose down at this fill weight lofts higher per gram than duck down or synthetic fill, which is why a 400-500 GSM goose down doona feels warmer than a synthetic doona at the same rated weight. This is the category for Melbourne, Hobart, Canberra, and any bedroom that regularly sits below 12°C overnight through June and July.

Winter-weight goose down pros:

• Highest warmth-to-weight ratio of any fill type
• Genuinely comfortable in single-digit overnight temperatures
• Long-term loft recovery when fluffed regularly

Winter-weight goose down cons:

• Overheats in anything above a mild autumn night
• Requires more careful care than a synthetic quilt

Verdict: Buy for genuinely cold climates; Skip if your bedroom never drops below 15°C. The goose down quilt warm bedroom guide covers how to pair this weight with the right sheet set.

4. Down-alternative doona: best for allergy-prone sleepers

A down-alternative doona replaces feather fill with a synthetic equivalent, which matters for sleepers with feather or dust allergies rather than for warmth performance alone. At a comparable GSM, down-alternative sleeps slightly heavier than natural down but avoids the allergy risk entirely.

Down-alternative doona pros:

• No feather allergy risk
• Machine-washable without the care requirements of natural down
• Comparable warmth at matching GSM ratings

Down-alternative doona cons:

• Slightly heavier per GSM than goose or duck down
• Doesn't loft back to shape as reliably over years of washing

Verdict: Buy if allergies rule out natural down; otherwise goose down at the same GSM is the better long-term fill. The down-alternative doona guide breaks down which fill types suit sensitive sleepers.

How this ranking was built

Each category above is ranked against the six criteria listed earlier: GSM fill weight, fill type, climate zone, casing breathability, layering compatibility, and allergy sensitivity. The all-season band ranks first because it's the only category that satisfies most of those criteria for most Australian postcodes without requiring a seasonal swap.

Which doona warmth rating should you choose?

If you're only buying one doona in 2026, buy the 300-400 GSM all-season weight and adjust with your quilt cover and sheet set as seasons shift. If you live somewhere with a genuine winter, add a 400-500+ GSM goose down doona for June through August and store the lighter one. Allergy sufferers should default to down-alternative at whichever GSM matches their climate zone, not chase the highest warmth number available.

FAQ

One last thing

GSM is a fill-weight measurement, not a universal warmth scale, which is why two doonas rated at the same GSM can sleep differently depending on whether the fill is goose down, duck down, or synthetic. Check fill type alongside GSM before buying, not GSM alone.

Related guides

• Natural vs synthetic quilts guide