Best time to go to Rottnest Island
The best time to visit Rottnest Island, Perth can depend on the weather and when visitor numbers rise and fall. The hottest average temperature around Rottnest Island, Perth falls in January, when visitor numbers are slightly high and weather is sunny with no rain. The coolest average temperature around Rottnest Island, Perth falls in July, visitor numbers are average and weather is mostly sunny with light rain.
 Calendar Month |  Temperature |  Precipitation |  Cloudiness |  Occupancy |  Pricing |
| January | 77.5°F (25.3°C) | No Rain | Sunny | Slightly High | Average |
| February | 77.4°F (25.2°C) | No Rain | Sunny | Slightly High | Slightly High |
| March | 73.8°F (23.2°C) | No Rain | Sunny | Average | Average |
| April | 68.0°F (20.0°C) | No Rain | Mostly Sunny | Average | Average |
| May | 61.5°F (16.4°C) | Light Rain | Mostly Sunny | Slightly Low | Average |
| June | 57.4°F (14.1°C) | Light Rain | Mostly Sunny | Slightly Low | Slightly Low |
| July | 55.8°F (13.2°C) | Light Rain | Mostly Sunny | Average | Slightly Low |
| August | 56.3°F (13.5°C) | Light Rain | Mostly Sunny | Slightly Low | Slightly Low |
| September | 58.6°F (14.8°C) | Light Rain | Mostly Sunny | Average | Average |
| October | 63.1°F (17.3°C) | No Rain | Mostly Sunny | Average | Average |
| November | 68.9°F (20.5°C) | No Rain | Sunny | Average | Slightly High |
| December | 74.3°F (23.5°C) | No Rain | Sunny | Slightly High | Slightly High |
