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Weather & Climate in Rottnest Island, Australia
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Rottnest Island enjoys a temperate climate with an average annual temperature of 66°F (19°C). Winters average 71°F in January while summers reach 61°F in July / relatively mild seasonal variation. The area gets 352 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 18.8 inches (drier than the 38-inch national average). The city sits at an elevation of 33 feet.
Temperature
71°F Jan (22°C)
61°F Jul (16°C)
| Annual Average | 66.1°F |
| 22% above US avg | |
| January Average | 71°F (22°C) |
| July Average | 61°F (16°C) |
| Sunny Days | 352 days/yr |
Geography
| Elevation | 33 ft (10 m) |
| Area | 12.8 sq mi (33.0 km²) |
| Population Density | 44/sq mi |
| Coordinates | -31.9952°N, 115.5404°W |
| Timezone | Australia/Perth |
Precipitation & Snow
Air Quality
Earthquake History
8 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.2.
| Jan 17, 1990 | 30 km E of Northam, Australia | M5.2 | 142 km | 7 km |
| Dec 20, 1996 | 61 km N of Toodyay, Australia | M4.5 | 148 km | 10 km |
| Mar 24, 2003 | 36 km NE of York, Australia | M4.0 | 150 km | 5 km |
| Mar 15, 1999 | 35 km NE of York, Australia | M3.7 | 148 km | 10 km |
| May 6, 2005 | 5 km NW of Bullsbrook, Australia | M2.8 | 57 km | 2 km |
| Jul 18, 2003 | 42 km N of Toodyay, Australia | M2.8 | 132 km | 0 km |
| Mar 15, 2005 | 46 km NE of Boddington, Australia | M2.7 | 136 km | 0 km |
| Apr 15, 2005 | 10 km SSW of York, Australia | M2.5 | 111 km | 2 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
1 hurricane (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 1.
| Year | Name | Category | Max Wind | Closest |
| 2021 | Seroja | Category 1 | 63 mph | 291 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 71°F (22°C) | 0.4 in | |
| February | 75°F (24°C) | 0.7 in | Warmest |
| March | 73°F (23°C) | 0.4 in | |
| April | 68°F (20°C) | 1.2 in | |
| May | 64°F (18°C) | 3.6 in | |
| June | 60°F (16°C) | 4.8 in | |
| July | 61°F (16°C) | 5.1 in | Wettest |
| August | 58°F (14°C) | 3.4 in | Coldest |
| September | 59°F (15°C) | 2.2 in | |
| October | 62°F (16°C) | 1.3 in | |
| November | 66°F (19°C) | 0.8 in | |
| December | 70°F (21°C) | 0.2 in | Driest |
Rottnest Island has a seasonal temperature swing of 17°F / from 58°F in August to 75°F in February. Total annual precipitation is 24.2 inches, with July being the wettest month (5.1") and December the driest (0.2").