Keep in mind that the seasons Down Under are opposite to those in the Northern Hemisphere. Sydney's weather is pleasant year-round, though the winters (June through August) can be clammy. Spring is the wettest season, while summer (December through February) is normally comfortable. The average high in January is 79 degrees F and the average low in July is 45 degrees F.
Check out what festivals, attractions and live performances are happening (see "Attractions and Seasonal Events" below).
Take care of your flight, transportation and accommodations (see Related eHows).
Check the weather forecast for Sydney shortly before leaving.
Take part in the Festival of Sydney. Summer is celebrated during the whole month of January; the biggest events are the jazz, opera and classical weekends. Don't miss the street theater.
Watch the beautiful mayhem of the sailing regattas out of Sydney harbor every Saturday.
Parade through downtown with 700,000 partiers of all orientations at the Sydney Gay and Lesbian Mardi Gras in February or early March.
Cultivate new interests at the Royal Easter Fair, a 10-day gala with equestrian shows and agricultural displays.
Jog the 14km City to Surf Run held in August. Slightly less energetic folk enjoy the scenic 8km walk from Manly (a peninsula) to Spit.
See great films while sitting in a park. Shows start at 8:45 every night in Centennial Park, close to Oxford Street.
Explore the great outdoors. Hard-core travelers make trips into the outback (inner Australia), but Sydney has so much to offer that there's little reason to go so far. South of Sydney are the mountains of the Great Dividing Range (also known as the Blue Mountains), a great place for mountain sports and even skiing from June to September.
Don't miss Sydney's favorite fast food: Yummy and affordable Thai food is available everywhere.
Hang ten in a superb setting. Sydney's beach continues for 1,000 miles in each direction; in addition to surfing, there all types of water sports, including excellent sailing and diving. Bondi Beach is the best in the area.