wellness
Screen Time & Sleep: Perth Research Shows 34-Minute Impact
UWA study reveals evening device use cuts Perth sleep by 34 minutes. Local sleep clinics confirm winter patterns-here's what actually works.
How we reported this
A University of Western Australia study released last month tracked 312 Perth adults and found those who used phones or tablets within 45 minutes of bedtime recorded 34 minutes less total sleep on average than those who switched off earlier.
The timing matters now because winter daylight ends by 5.30pm, pushing many workers and students toward screens for longer stretches after dinner. Perth households report average evening screen sessions stretching past 10pm, a pattern that overlaps with the city’s peak period for sleep complaints logged at local clinics.
Perth routines show the pattern
People who finish Swan River cycle paths near Mounts Bay Road by 7pm and then avoid further scrolling sleep more consistently than those who continue checking messages on the return trip. Kings Park parkrun participants who meet at 8am on Saturdays often note they recover better when they leave devices in another room after the event rather than scrolling race photos late into the night. Western Australia Country Health Service clinics in the metropolitan area have seen a 12 percent rise in sleep-related appointments since 2024, many tied to device habits rather than shift work.
Local data backs the lab findings. The Australian Bureau of Statistics 2025 time-use survey recorded Perth residents averaging 6.8 hours of daily recreational screen time, with 58 percent of that occurring after 8pm. Participants in the UWA trial who reduced blue-light exposure after 9pm improved their sleep efficiency scores by 19 percent within two weeks, measured through wrist-worn trackers.
Practical steps that fit daily life
Residents can start with a 30-minute buffer before bed that replaces screens with a short walk along the Indian Ocean foreshore or a stretch in Kings Park. Setting device night modes to activate at 8.30pm and charging phones outside the bedroom cuts the temptation to check notifications. Those who combine these changes with existing habits like weekend parkrun report falling asleep faster and waking with fewer interruptions. Anyone experiencing ongoing sleep trouble should speak with a GP or sleep specialist at a WACHS-linked service for personalised assessment.