SeasonMapExmouth weather in September
Australia
September in Exmouth: warm, dry, with clean air — an excellent time to visit.
#3 of 12 months in Exmouth · #41 of 1383 destinations to visit in September · comfort 94/100 (tier S)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Exmouth in September
Other months in Exmouth
Exmouth's forum calls October shoulder season for the whale sharks the Ningaloo Reef is known for — the main season runs roughly March through August, with off-peak snorkel tours stretching into mid-October, so it's worth confirming with a tour operator before booking. Regulars describe the weather itself as reliably warm with cool nights, though it can be genuinely windy.
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Exmouth climate normals — September
| Daytime high | 27°C / 80°F | 🌤 warm |
|---|---|---|
| Nighttime low | 19°C / 66°F | |
| Feels like (high) | 26°C / 79°F | |
| Sea temperature | 23°C / 73°F | 🙂 pleasant |
| Rainfall | 2 mm / 0.1 in | ☀️ dry |
| Rainy days | 1 days | |
| Humidity | 57% | 🍃 comfortable |
| Dew point | 13°C / 55°F | |
| Sunshine | 11 h/day | |
| Daylight | 12 h | |
| Wind | 25 km/h / 16 mph | |
| Air quality (US AQI) | 30 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Exmouth 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.
Peak crowdsPeak season on the Cape, Spring break in Australia, school holidays in 2 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Exmouth'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 weatherExmouth's weather doesn't swing hard through the year — comfort stays fairly steady in every month.
What's on in Exmouth in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Peak season on the Cape
1 Apr – 31 OctDry seasonCrowdedBook earlyApril to October is the town's season: the reef boats run daily, the caravan parks fill with people escaping the southern winter, and beds go months ahead of time.
- Nature
Swim season with humpbacks
1 Aug – 31 Oct · usuallyWhale seasonBook earlyNingaloo is one of the few coasts licensed for in-water humpback encounters, run from August to October by the same operators as the whale sharks and on the whales' terms, not yours. Source ↗
Where is Exmouth?
Exmouth in September — FAQ
- Is September a good time to visit Exmouth?
- September in Exmouth: warm, dry, with clean air — an excellent time to visit. It ranks #3 of 12 months for Exmouth on SeasonMap's comfort score (94/100).
- What is the weather like in Exmouth in September?
- In September, Exmouth averages a daily high of 26.6°C and a low of 19°C, with about 1.8 mm of rain over roughly 0.5 rainy days.
- What is the air quality in Exmouth in September?
- Exmouth has a mean US Air Quality Index of about 30 in September.