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Perth Weather

Next 48hrs in Perth

Fri 29
6:00pm
Mostly clear18°CMostly clear
Rain: 26% (0.1mm/hr) 
Humidity: 82%
Wind:  NW 31km/h 
Fri 29
9:00pm
Mostly clear17°CMostly clear
Rain: 31% (0.2mm/hr) 
Humidity: 86%
Wind:  NW 26km/h 
Sat 30
12:00am
Shower15°CShower
Rain: 73% (0.3mm/hr) 
Humidity: 87%
Wind:  W 26km/h 
Sat 30
3:00am
Mostly cloudy13°CMostly cloudy
Rain: 5% (0.0mm/hr) 
Humidity: 80%
Wind:  W 20km/h 
Sat 30
6:00am
Mostly cloudy12°CMostly cloudy
Rain: 32% (0.1mm/hr) 
Humidity: 79%
Wind:  W 14km/h 
Sat 30
9:00am
Mostly cloudy14°CMostly cloudy
Rain: 9% (0.0mm/hr) 
Humidity: 70%
Wind:  WNW 16km/h 
Sat 30
12:00pm
Mostly cloudy18°CMostly cloudy
Rain: 26% (0.1mm/hr) 
Humidity: 59%
Wind:  WNW 26km/h 
Sat 30
3:00pm
Mostly cloudy19°CMostly cloudy
Rain: 21% (0.1mm/hr) 
Humidity: 61%
Wind:  WNW 28km/h 
Sat 30
6:00pm
Chance shower17°CPossible shower
Rain: 53% (0.1mm/hr) 
Humidity: 71%
Wind:  WNW 26km/h 
Sat 30
9:00pm
Chance shower15°CPossible shower
Rain: 58% (0.2mm/hr) 
Humidity: 80%
Wind:  WNW 27km/h 
Sun 31
12:00am
Chance shower14°CPossible shower
Rain: 63% (0.2mm/hr) 
Humidity: 81%
Wind:  WNW 30km/h 
Sun 31
3:00am
Shower12°CShower
Rain: 90% (0.9mm/hr) 
Humidity: 84%
Wind:  WNW 31km/h 
Sun 31
6:00am
Slight chance shower11°CPossible shower
Rain: 44% (0.5mm/hr) 
Humidity: 81%
Wind:  W 32km/h 
Sun 31
9:00am
Shower. Windy13°CShower
Rain: 88% (0.2mm/hr) 
Humidity: 69%
Wind:  WSW 37km/h 
Sun 31
12:00pm
Chance shower. Windy17°CPossible shower
Rain: 60% (0.3mm/hr) 
Humidity: 58%
Wind:  SW 39km/h 
Sun 31
3:00pm
Mostly cloudy16°CMostly cloudy
Rain: 20% (0.1mm/hr) 
Humidity: 56%
Wind:  SW 34km/h 
What is Opticast?

Opticast is an automated forecasting system designed to produce detailed forecasts for specific times of each day. The system works by taking forecasts from a range of computer models and comparing them with past observations to produce the most accurate possible forecast possible, tailored to a specific location where weather observations are taken.

Opticast allows you to 'drill-down' into the daily forecast, giving you a more exact idea of your local conditions at particular times of interest to you. For example, if you cycle to work you are likely to be most interested in the temperature, wind and chance of rain at 6am and 9pm. Or if you're organising an afternoon party and the daily forecast is for late thunder, you'll want to know what time the bad weather is likely to arrive.

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