SeasonMapKangaroo Island (Kingscote) weather in September
Australia
September in Kangaroo Island: cool, a little rain, with clean air — a great time to visit.
#8 of 12 months in Kangaroo Island · #837 of 1383 destinations to visit in September · comfort 75/100 (tier B)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Kangaroo Island in September
Other months in Kangaroo Island
Kangaroo Island's forum calls February usually the hottest month in the south, part of a Mediterranean climate with warm summer days that rarely turn genuinely uncomfortable. Regulars are split on how much to love it — some rate February among the best months, others avoid it for the heat — and are unanimous that wind off the ocean is a constant here year-round, worth a windbreaker regardless of season.
Add your own note from Kangaroo Island's card on the map.
Kangaroo Island climate normals — September
| Daytime high | 17°C / 63°F | 🙂 cool |
|---|---|---|
| Nighttime low | 7°C / 45°F | |
| Feels like (high) | 15°C / 59°F | |
| Sea temperature | 15°C / 59°F | 🥶 cold sea |
| Rainfall | 48 mm / 1.9 in | 🌦 some rain |
| Rainy days | 8 days | |
| Humidity | 72% | 💧 humid |
| Dew point | 8°C / 46°F | |
| Sunshine | 9.8 h/day | |
| Daylight | 11.9 h | |
| Wind | 25 km/h / 15 mph | |
| Air quality (US AQI) | 29 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Kangaroo Island 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)
Peak crowdsBusyShoulder seasonQuiet
Best months for Kangaroo Island'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 weatherKangaroo Island's weather peaks January–March, best around February.
Best weatherFair weatherToughest weather
What's on in Kangaroo Island in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Rule
Seal Bay, ranger access only
1 Jan – 31 DecBook earlyThe sea lion beach can only be walked with a ranger on a timed tour, and the boardwalk above it is the alternative. Tours sell out in the holidays, so book before you take the ferry. Source ↗
- Nature
Southern right whales
15 May – 30 Sep · usuallyWhale seasonSouthern rights move along the north coast and into the bays through winter, with mothers and calves close in. Cliff tops do the job better than boats do here.
- Nature
Spring wildflowers and orchids
15 Aug – 31 Oct · usuallyWildflowers & bloomsThe heath along the western end flowers from late August, orchids included, and it is the part of the year the burnt country from the 2020 fires looks most like it is coming back.
Nearby, and something's on
Within 300 km of Kangaroo Island — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Kangaroo Island?
Kangaroo Island in September — FAQ
- Is September a good time to visit Kangaroo Island?
- September in Kangaroo Island: cool, a little rain, with clean air — a great time to visit. It ranks #8 of 12 months for Kangaroo Island on SeasonMap's comfort score (75/100).
- What is the weather like in Kangaroo Island in September?
- In September, Kangaroo Island averages a daily high of 17°C and a low of 7.2°C, with about 48.3 mm of rain over roughly 8 rainy days.
- What is the air quality in Kangaroo Island in September?
- Kangaroo Island has a mean US Air Quality Index of about 29 in September.
Other months in Kangaroo Island
Compare Kangaroo Island in September
Warmer or cooler than Kangaroo Island in September
Similar destinations in Oceania — September
Within 300 km: Adelaide's Southern right whales around 1 Jun – 15 Oct.