Sydney is the perfect city of IAC 2025
Sydney is an iconic, international city and stands ready to ensure that the 76th IAC is a resounding success for the IAF and the broader international space community.
Sydney has a successful track record in hosting large, international events, including the 2000 Olympic Games.
Australia is home to the world’s oldest, continuous culture. The Sydney of today sits on the traditional lands of the Gadigal and 29 clans of the Eora nation. The city is now a melting pot of every culture, where the cultural strength of an ancient people and culture mixes with the exciting vibrancy of the whole world.
A combination of iconic attractions and unforgettable experiences will ensure IAC 2025 delegates and accompanying persons and their children leave Sydney with memories that will last a lifetime.

Key dates
REGISTRATION
Early bird closes
Standard commences /
Standard closes
29 AUG 2025
Late open /
Closes
SOLD OUT
IAC 2025 call for papers
IAC 2025 PLENARY EVENTS, SPECIAL SESSIONS, TECHNICAL SESSIONS, AND ABSTRACT SUBMISSIONS CLOSE
IAC 2025 GNF SESSIONS CLOSE
IAC 2025 ABSTRACT SELECTION NOTIFICATION
IAC 2025 IN SYDNEY, AUSTRALIA
Weather for IAC 2025
October is generally a very pleasant 23 degrees Celsius (73.4 degrees Fahrenheit). It is no wonder Sydney is the fourth most liveable city. Sydney also enjoys a reputation as one of the safest cities in the world.
Spring (September – November)
In spring, days are warmer but the humidity is not as high as summer. Average daily temperatures range from 11 – 23°C (51.8 – 73.4°F).

Your adventure starts in Sydney
Whether you are interested in history, culture, nature, or just soaking up the atmosphere of this vibrant city, Sydney has something for everyone.

Cosmopolitan Sydney is set on one of the world’s most beautiful harbours complete with the Sydney Opera House and Sydney Harbour Bridge, and a wealth of beaches, museums, galleries, nature, and wildlife. You can even climb the Harbour Bridge for spectacular views of the Opera House and harbour.

No trip to Sydney is complete without visiting one of the world’s most famous beaches, Bondi Beach. It is well known for its surfing culture and stunning coastal views.


Explore World Heritage-listed Blue Mountains National Park, home of the famous Three Sisters in Katoomba. Discover iconic lookouts and waterfalls, historic walking tracks, mountain biking, adventure sports and camping – right on Sydney’s doorstep.