Screen time and sleep: what the research actually shows

Blue-lit screens are keeping many in Cairns up far later than they planned, but contemporary research suggests the truth about screens and sleep is more nuanced than old warnings might suggest. Local residents, particularly in central suburbs around Lake Street and at university campuses, are reporting restless nights after scrolling on their phones or laptops before bed.

This issue has hit a new urgency as Cairns recovers from a busy tourism winter. Long shifts at hospitality venues on Abbott Street and early-morning market runs to Rusty's mean many residents are looking for ways to maximise the quality of their sleep, and questioning whether dumping devices is the secret.

Late-night tech in paradise

According to staff at Edge Hill Health, a prominent wellness centre near Collins Avenue, phone and tablet use late at night is one of the top concerns raised at their weekly sleep health workshops. Dr. Kim Nguyen, a visiting sleep educator who presents at Cairns Base Hospital’s community sessions, points out that many struggle to wind down after evening shifts, relying on streaming services or reading news updates to relax.

The city’s distinctive tropical lifestyle adds a unique pressure: outdoor fitness bootcamps at Goomboora Park kick off before sunrise to beat the heat, meaning for many workers and students, functioning on good rest isn’t optional. Both James Cook University and local GP clinics in Cairns North have rolled out educational leaflets on sleep hygiene, with device use before bed now a central talking point. A recent JCU campus survey found students cite phone use as their top barrier to falling asleep quickly during exam weeks.

What the research shows in numbers

Research from Australia’s Sleep Health Foundation, published in June 2025, found that 62% of adults nationwide use their smartphones in the hour before bedtime at least three nights a week. The review noted that screen exposure can suppress melatonin release, the hormone that supports sleep, but also emphasised duration and content matter: brief, non-stimulating screen use had less effect, while active engagement with social media or intense work emails had a bigger impact on latency and sleep quality. Scientists also point out that individual tolerance varies, with some able to use screens for short periods without disturbing their sleep cycle.

Locally, sleep health educator sessions at Cairns Base Hospital cost $25 per attendee, and demand continues to grow as more residents look for practical, not puritanical, advice. Staff have observed that when screens are swapped out for quiet audio or a book at least thirty minutes before sleep, attendees report drifting off faster within a fortnight.

What works for Cairns

The consensus from Cairns health professionals and the research is that there’s no need for harsh all-or-nothing rules when it comes to screens at bedtime. Instead, the focus is on mindful use. Setting a device wind-down alarm, changing phone settings to Night Shift mode after 9pm, or capping scrolling time to 15 minutes can make a measurable difference. Rusty's Markets wellness stalls now stock blue-light blocking glasses for around $35-a small investment that some locals find helps when late-night screen use is unavoidable.

Ultimately, Cairns residents looking to improve their sleep can start by making gradual tweaks: keep the bed for sleeping instead of browsing, replace pre-sleep entertainment with an audio book from Cairns City Library, or simply plan tomorrow’s sunrise hike at Crystal Cascades instead of doomscrolling. Anyone struggling with ongoing sleeplessness is encouraged to consult with a local GP or a registered sleep therapist before making major changes.