SeasonMapMargaret River weather in September
Australia
September in Margaret River: cool, rainy, with clean air — a great time to visit.
#8 of 12 months in Margaret River · #920 of 1383 destinations to visit in September · comfort 71/100 (tier B)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Margaret River in September
Other months in Margaret River
Margaret River's forum calls January warm inland and noticeably cooler toward the coast — regulars say temperatures can nudge 30°C further from the water, but mostly sit in the high 20s. It's also the driest, sunniest month of the year, good news for a day spent moving between wineries.
Add your own note from Margaret River's card on the map.
Margaret River climate normals — September
| Daytime high | 17°C / 63°F | 🙂 cool |
|---|---|---|
| Nighttime low | 8°C / 46°F | |
| Feels like (high) | 15°C / 59°F | |
| Sea temperature | 18°C / 64°F | 🧊 bracing |
| Rainfall | 97 mm / 3.8 in | 🌧 rainy |
| Rainy days | 14 days | |
| Humidity | 72% | 💧 humid |
| Dew point | 9°C / 48°F | |
| Sunshine | 9.5 h/day | |
| Daylight | 11.9 h | |
| Wind | 20 km/h / 12 mph | |
| Air quality (US AQI) | 27 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Margaret River 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 Margaret River'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 weatherMargaret River's weather peaks December–February.
Best weatherFair weatherToughest weather
What's on in Margaret River in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Nature
Whale season, coast to coast
1 Jun – 10 Dec · usuallyHumpbacks and southern rights shelter off Augusta in the middle of winter, then work north to Geographe Bay through spring, so the boat leaves from a different town depending on the month.
- Nature
Southwest wildflowers
15 Aug – 15 Nov · usuallyWildflowers & bloomsThe forest floor and the heath along the Cape to Cape flower from late August: orchids, kangaroo paw, banksia. It is a short window and the karri forest tracks are the place to spend it.
Nearby, and something's on
Within 300 km of Margaret River — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Margaret River?
Margaret River in September — FAQ
- Is September a good time to visit Margaret River?
- September in Margaret River: cool, rainy, with clean air — a great time to visit. It ranks #8 of 12 months for Margaret River on SeasonMap's comfort score (71/100).
- What is the weather like in Margaret River in September?
- In September, Margaret River averages a daily high of 17°C and a low of 7.5°C, with about 96.7 mm of rain over roughly 13.9 rainy days.
- What is the air quality in Margaret River in September?
- Margaret River has a mean US Air Quality Index of about 27 in September.
Other months in Margaret River
Compare Margaret River in September
Warmer or cooler than Margaret River in September
Similar destinations in Oceania — September
Within 300 km: Perth's Humpbacks off the coast around 1 Sep – 5 Dec.