Sydney weather in December
“The kind of pleasant weather you build a trip around.”
Roughly 10 rainy days across the month, on average.
December in Sydney is peak summer, bringing warm and pleasant conditions perfect for beach lovers. Expect average highs of 26°C (79°F) and lows of 17.9°C (64°F). The month sees moderate rainfall with around 65.6mm spread across approximately 10 rainy days, so brief afternoon showers are common but rarely disruptive. You'll enjoy generous sunshine with 11.6 hours per day, ideal for outdoor exploration and water activities.
This is Sydney's festive season—Christmas markets, outdoor concerts, and harbor celebrations fill the calendar. The city buzzes with holiday energy and summer holidays bring both locals and tourists. Beaches are busy but the warm weather makes it perfect for swimming, picnicking, and seaside dining. It's the start of school holidays, so expect moderate to high crowds at popular attractions.
December 2026 is an excellent time to visit if you love warm weather and don't mind occasional rain showers. Pack light, breathable clothing and always carry a compact umbrella. Book accommodations and popular restaurants in advance, as summer is peak season. The combination of sunshine and warm temperatures makes it ideal for experiencing Sydney's outdoor lifestyle.
Sydney is not Australia's capital (Canberra is) and locals resent the assumption. The eastern suburbs (Bondi, Bronte, Coogee) and inner west (Newtown, Marrickville) despise each other's aesthetics — one is model-perfect, the other is Portuguese chicken and Vietnamese pho. 'The bridge' means the Harbour Bridge and 'the coathanger' is its nickname. Never queue-jump at a bakery; the correct phrase is 'sorry mate, you before me?' Order a 'flat white' invented here, not a latte.
What to pack for Sydney in December
December calls for light, breathable summer clothing that handles both heat and occasional rain. Prioritize UV protection and quick-drying fabrics. Pack versatile pieces that work for beach days, casual dining, and exploring the city in warm conditions.
- Lightweight linen shirt or cotton t-shirt
- Shorts or linen pants
- Light rain jacket or compact poncho
- Sundress or casual summer dress
- Comfortable walking sandals or sneakers
- Wide-brimmed sun hat
- Swimsuit and beach cover-up
What to pack for Sydney in December
- →Quick-dry travel shirtAmazon · shop this
- →UPF sun hatAmazon · shop this
- →Compact travel umbrellaAmazon · shop this
- →Reef-safe sunscreen SPF 50Amazon · shop this
- →Polarized sunglassesAmazon · shop this
- →Universal travel adapterAmazon · shop this
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Where to stay in Sydney
We don't review individual hotels — plenty of people do that well. What we do is send you to compare rooms in Sydney across trusted platforms.
Compare hotels on Booking.com→Estimated December trip to Sydney
Peak season prices — book early or shift by 2–3 weeks to save. Rule-based estimates from a couple based in London — actual prices vary.
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Delayed flight to Sydney?
Flights to Sydney in December can be delayed by storms. Claim up to €600 if yours is 3+ hours late. EU regulations cover flights departing from or arriving in the EU/UK.
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Things worth doing
Swim at Bondi or Manly Beach, visit the Blue Mountains for hiking and waterfalls, explore the Royal Botanic Garden, enjoy waterfront dining at Darling Harbour, catch live music at outdoor venues.
December vs. the rest of the year
How this month compares in Sydney. Tap any month to read more.
highlighted months are among the best time to visit.
Best time to visit Sydney
December is one of the best months to visit Sydney — alongside September, October, November. 11-year climate data (2015–2025) confirms it: comfortable temperatures, manageable rainfall, and a healthy dose of sunshine.
See the full best-time-to-visit guide for SydneyOther places with a similar climate right now
Sydney in December — FAQ
Q01Should I visit Sydney in December?
Should I visit Sydney in December?
Yes — it is a good time to visit, with pleasant, comfortable weather. In December, Sydney averages a high of 26°C (79°F) and a low of 18°C (64°F), with 66mm of rainfall across roughly 10 rainy days. March-April is autumn: harbor water still 22C, humidity drops, and the Sydney Royal Easter Show fills Homebush with country show-bag culture.
Q02What temperatures should I expect in Sydney during December?
What temperatures should I expect in Sydney during December?
The average high temperature in Sydney during December is 26°C (79°F), with an average low of 18°C (64°F). These figures are averaged from 11 complete years of daily records (2015–2025, Open-Meteo Archive). July nights drop to 8C and Sydney homes have no insulation; locals layer up and huddle in the Australian Museum or the Blue Mountains for actual snow at Katoomba.
Q03Is December a rainy month in Sydney?
Is December a rainy month in Sydney?
Sydney averages approximately 10 rainy days in December, with a total monthly rainfall of about 66mm. This is based on daily precipitation records where days with 1mm or more of rain are counted as rainy days.
Q04How should I dress for Sydney in December?
How should I dress for Sydney in December?
For Sydney in December, pack a compact umbrella or waterproof jacket, sunscreen and sunglasses, comfortable walking shoes. These recommendations are based on 11 complete years of weather averages for this specific month. Reef-safe zinc stick — Australia banned oxybenzone at reef beaches and pharmacists actively refuse to sell chemical sunscreens near Manly.
Q05Is December a busy travel month for Sydney?
Is December a busy travel month for Sydney?
Tourist crowds in Sydney during December are typically moderate — winter is high season for tropical destinations. Consider this when planning accommodation — prices track crowd levels closely. Sydney is not Australia's capital (Canberra is) and locals resent the assumption. The eastern suburbs (Bondi, Bronte, Coogee) and inner west (Newtown, Marrickville) despise each other's aesthetics — one is model-perfect, the other is Portuguese chicken and Vietnamese pho. 'The bridge' means the Harbour Bridge and 'the coathanger' is its nickname. Never queue-jump at a bakery; the correct phrase is 'sorry mate, you before me?' Order a 'flat white' invented here, not a latte.