Wollongong weather in September

September in Wollongong: nice, a little rain, with clean air — an excellent time to visit.

Updated September 2026 · climate normals from ERA5 reanalysis

Wollongong🇦🇺 Australia · Australian East Coast · Beach80
  1. 85Jan
  2. 83Feb
  3. 78Mar
  4. 82Apr
  5. 77May
  6. 70Jun
  7. 71Jul
  8. 75Aug
  9. 80Sep
  10. 82Oct
  11. 81Nov
  12. 84Dec

#7 of 12 months in Wollongong · #709 of 1413 destinations to visit in September · comfort 80/100 (tier A)

Days
20°C
Nights
12°C
Wet days
6
Sun
10.1 h
Humidity
67%
Daylight
12 h
Wollongong, Australia
Photo: Onin · Pexels

Traveller notes on Wollongong in September

Notes from nearby Sydney (68 km away)

Wollongong doesn't have its own notes for September yet — these are about Sydney, close enough to share the season.

September is early spring in Sydney: cool-to-warm sunny days, low humidity, and sunshine reliable enough that it is the city's busy wedding month. The caveat regulars attach is that it is the first month of spring and notoriously unpredictable - summery or even hot one day, properly cold the next - so the packing is layered. Two September draws come with it: the jacarandas begin, with McDougall Street in Kirribilli the name everyone gives and the ferry to Woolwich the quieter alternative, and the whales are still passing, though one September report notes the wind on the boat was properly cold. The record: 20C days that feel like 19C, 13.2C nights, 6.6 precipitation days carrying 73.4mm and an 18.3C sea.
TheWeddingMonth · September · 1 month ago · about Sydney · Read more on Tripadvisor ↗

Other months in Wollongong

Forum posters describe Wollongong's July as squarely winter, cool with genuinely variable weather, and recommend wind-proof clothing given how biting the coastal wind can turn, especially once the dry southwesterlies pick up later in winter into August-September. Posters note Wollongong sees heavy-rain days regularly but overall fewer stretches of mixed, changeable weather than Melbourne, with roughly 137 rainy days a year on average. Posters describing the following spring, September through November, note those months bring markedly clearer, crisper conditions - useful context for anyone deciding between a winter or spring visit. Posters generally rate July as cool, wind-affected and genuinely wintry for Wollongong, workable with proper layers and wind protection.
Tripadvisor community · July · 1 month ago · Read more on Tripadvisor ↗
Forum posters note Wollongong genuinely gets a lot of rain year-round - more than twice London's annual rainfall by one poster's count, with roughly 137 days of some rain a typical year - so a summer visit is never a sure bet for wall-to-wall sun. One visitor's five-day December trip (similar seasonal pattern to January) landed three good tourist days and two stormy ones spent mostly near the hotel, which posters treat as a fairly representative mix for this time of year. Despite the rain risk, posters describe January days as warm and pleasant when the weather does cooperate, with the coastal escarpment scenery and beaches making it worth building in flexibility rather than a rigid day-by-day plan.
Tripadvisor community · January · 1 month ago · Read more on Tripadvisor ↗

Add your own note from Wollongong's card on the map.

Wollongong climate normals — September

Daytime high20°C / 69°F😎 nice
Nighttime low12°C / 54°F
Feels like (high)19°C / 66°F
Sea temperature18°C / 65°F🧊 bracing
Rainfall72 mm / 2.8 in🌦 some rain
Rainy days6 days
Humidity67%💧 humid
Dew point8°C / 46°F
Sunshine10.1 h/day
Daylight11.9 h
Wind22 km/h / 14 mph
Air quality (US AQI)34🍃 good

Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.

Crowds in Wollongong in September

How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.

BusySpring break in Australia, school holidays in 2 of the markets that fill it(estimated)

JFMAMJJASOND

Peak crowdsBusyShoulder seasonQuiet

Best months for Wollongong's weather

Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).

Fair weatherWollongong's weather doesn't swing hard through the year — comfort stays fairly steady in every month.

JFMAMJJASOND

What's on in Wollongong in September

Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.

  • Nature

    Humpbacks past the escarpment

    15 May – 15 Nov · usuallyWhale season

    The whole east-coast migration passes close in below the escarpment, and the headlands at Bald Hill and Hill 60 are free grandstands. Northbound from late May, mothers and calves loitering closer from September. Source ↗

What's on around the world in September →

Nearby, and something's on

Within 300 km of Wollongong — a day trip or a short hop — with something on this month. Never part of the comfort score.

Where is Wollongong?

Loading map…

Wollongong in September — FAQ

Is September a good time to visit Wollongong?
September in Wollongong: nice, a little rain, with clean air — an excellent time to visit. It ranks #7 of 12 months for Wollongong on SeasonMap's comfort score (80/100).
What is the weather like in Wollongong in September?
In September, Wollongong averages a daily high of 20.3°C and a low of 12.4°C, with about 71.7 mm of rain over roughly 5.5 rainy days.
What is the air quality in Wollongong in September?
Wollongong has a mean US Air Quality Index of about 34 in September.

Within 300 km: Sydney's Humpback migration around 15 May – 15 Nov, and Katoomba's Waratahs and heath in flower around 15 Sep – 15 Nov.