Christmas is right around the corner, and the weather gurus have peered into their crystal (weather) ball to reveal what's in store for 25 December 2025. Will it be a scorcher fit for backyard barbecues, pool parties, and prawns on the deck, or will we be taking cover under Nana's pergola with a cuppa and Christmas pudding? Christmas Day 2025 is looking like a mixed bag weather-wise, with temperatures expected to be 27°C, and scattered rain and even thunderstorms are predicted in the morning and afternoon. 

Australia's Christmas Day weather forecast is always a hot topic (literally), and this year's early predictions are already giving families clues about whether to prep the sunscreen or the umbrellas. Here's what the experts are saying about Australia's Christmas weather for 2025 and how it could shape your festive celebrations.

Will it Rain on Christmas Day in Sydney 2025?

Sydney weather is wildly unpredictable at the best of times, but when Christmas rolls around, you better believe we're crossing fingers, toes, and arms to banish any dark clouds from spoiling our day. 

When it comes to the all-important question of will it rain on Christmas Day in Sydney? the early forecast for Sydney's Christmas weather in 2025 is shaping up to be pleasantly warm, but with cloudy skies predicted and a few showers and even thunderstorms on the horizon - but wait, there's good news!

According to AccuWeather's forecast, Thursday, 25 December 2025, is expected to be a humid day, with temperatures sitting at a balmy 27°C. Cloudy skies are predicted throughout the day, with a 55% chance of rain and a 33% chance of thunderstorms, most likely in the morning and then again in the afternoon. The weather gurus are predicting just 1 hour of rain all day, so luckily, it's not going to ruin the whole day.

The temperature will drop to a refreshing 20°C on Christmas night, and the probability of rain will rise to 65%.

Boxing Day Weather in Sydney 2025

The weather on Boxing Day 2025 is going to take quite a turn, with the temperature dropping to a mild 24°C. There's a 55% chance of rain (around 2 hours throughout the day) and a 13% chance of thunderstorms.  

Don't Forget About the UV Index

As always, Christmas and Boxing Day are a fantastic time for families to enjoy the outdoors, but it's also a day to stay sun-smart and heat-aware. UV levels can be high even when the temperature feels comfortable. The UV index is expected to be 3.0 (Moderate), so make sunscreen a priority before heading out for the day, and remember to reapply throughout the day, especially after swimming or sweating. If you're heading to a beach or park, set up a base with plenty of shade from umbrellas, cabanas, pop-up tents or even under a shady tree. Keep everyone hydrated by packing plenty of water and encouraging regular sips, even if no one is thirsty. 

The Best Outdoor Activities For Families

With just an hour or two of rain predicted for this Christmas, it's the perfect opportunity to lap up the outdoors with some wholesome family activities. You can start the morning by soaking up some stunning views with these spectacular Coastal Walks in Sydney, or strap on your walking shoes and get off the beaten track on a Family-Friendly Bushwalk. For something a little more relaxing, go for a refreshing dip at Sydney's Best Beaches or a playful splash at these Free Water Parks. And go with tradition on the 26th and head out for an epic Boxing Day Picnic - don't forget your cricket gear! 

What's Open On Christmas Day in Sydney?

If you are looking for a Christmas lunch without the clean-up, book one of the Best Christmas Day Lunches For Families and see What's Open On Christmas Day in Sydney.

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