Should You Turn Wi-Fi Off at Night?

Leaving Wi-Fi on overnight is generally fine

People ask “should I turn off Wi-Fi at night?”, “should Wi-Fi be on or off?” and “is it safe to leave Wi-Fi on all night?” The practical answer is that a correctly installed home Wi-Fi network can normally remain on around the clock.

There is no general rule saying a router must be switched off while you sleep. Turning off Wi-Fi at night is optional. It can help with household routines, screen-time limits and energy use, but it is not a medical necessity and it will not automatically improve your internet speed.

Choose the right type of switch-off

Wi-Fi is the wireless connection between devices and the router. The router manages your home network and directs traffic to the internet. A modem, fiber or fibre terminal, fixed-wireless receiver, satellite unit or mobile network connection links the home to an internet service provider. Many households receive a single hub that combines several of these functions.

Disabling Wi-Fi may leave the router, internet connection and wired Ethernet devices working. Unplugging the router usually takes the whole local network offline. This is why “turn off Wi-Fi at night”, “turn off the internet at night” and “turn off the router at night” do not always mean the same thing.

Wi-Fi uses non-ionizing radiofrequency energy

Wi-Fi equipment communicates using radiofrequency electromagnetic fields. This is non-ionizing radiation, which does not carry enough energy to remove electrons from atoms in the way ionizing radiation such as X-rays can. Exposure limits are designed to prevent established harmful effects from radiofrequency energy.

The World Health Organization says no health effects are expected from the low radiofrequency exposures produced by wireless networks. The International Commission on Non-Ionizing Radiation Protection has also reviewed Wi-Fi research, including studies of headaches, concentration, sleep quality, cognition and cardiovascular effects, and reports that this research has not shown adverse health effects from Wi-Fi exposure.

National authorities including Health Canada and the Australian Radiation Protection and Nuclear Safety Agency reach similar conclusions about normal Wi-Fi exposure. For a fuller explanation of exposure, evidence and common misconceptions, read our guide to whether Wi-Fi is harmful.

Some readers are specifically worried about whether Wi-Fi can cause cancer. Current international and national guidance does not recommend turning off a compliant home Wi-Fi router as a cancer-prevention measure. Scientific research continues to be monitored, but everyday Wi-Fi exposure has not been established as a cause of cancer.

It can help indirectly by changing bedtime behaviour

There is no good evidence that switching off a normal Wi-Fi signal directly improves sleep. However, turning Wi-Fi off may stop streaming, gaming, messages and late-night scrolling. That behavioural change can make a bedtime routine calmer.

Before disabling the whole network, try a more targeted option: Do Not Disturb, bedtime mode, app limits, reduced screen brightness, keeping the phone away from the bed or turning Wi-Fi off on the phone. Airplane mode disables more wireless connections, while Do Not Disturb mainly silences alerts.

Yes, but the amount varies

Turning off network equipment saves the electricity it would otherwise consume. The actual amount depends on the router, modem, fiber terminal, satellite equipment, cellular gateway, mesh Wi-Fi units and any separate wireless access points.

Disabling only the wireless radios generally saves less than switching off the entire router because its processor, Ethernet ports and internet connection may continue operating. Check the manufacturer's power rating or use a suitable energy monitor rather than relying on a universal estimate.

Do not power down equipment that supports an essential phone line, monitored alarm, medical alert system, security camera or other service that must stay connected.

A restart can fix a temporary fault, but it does not upgrade your connection

Turning a router off every night does not increase the speed of your internet plan. An occasional reboot may clear a software problem, refresh a connection or help some routers select a less congested Wi-Fi channel. That is temporary troubleshooting, not a long-term speed improvement.

For a fair test, run an internet speed test near the router and compare the result with a wired Ethernet connection when possible. Ethernet is often more stable than Wi-Fi because it avoids wireless interference, but the maximum result still depends on the internet service, equipment and device.

Persistent slow speeds, high latency or repeated disconnections should be investigated through router placement, interference, device load, provider status and the terms of the internet plan.

It reduces availability, but it is not a complete security strategy

A network that is switched off cannot be accessed during that period. However, nightly shutdowns do not replace strong router and Wi-Fi passwords, WPA2 or WPA3 encryption, current firmware, secure provider accounts and careful control of connected devices.

Change default administrator credentials where the equipment allows it, install updates, disable outdated security modes and use a guest network for visitors or less-trusted smart devices. These measures provide protection while the network is actually in use.

• Internet-based home phone service In many countries, voice service runs through the router or fiber equipment. Emergency calling may be unavailable when the equipment or household power is off.
• Security and safety devices Cameras, alarms, smart locks, baby monitors and medical alert products may lose remote access or notifications.
• Smart-home equipment Heating, cooling, lighting, speakers, appliances and automation routines may not work as expected.
• Updates and backups Phones, computers, game consoles and smart devices often perform maintenance during quiet overnight hours.
• Wi-Fi Calling and messaging A mobile phone may switch to the cellular network, lose Wi-Fi Calling or pause cloud services when Wi-Fi is unavailable.

Use the least disruptive method that meets your goal

• Pause individual devices This is usually the best way to limit children's internet access or stop a particular TV, tablet or console.
• Create a Wi-Fi schedule Many router and mesh apps include bedtime schedules, access profiles or wireless on/off times.
• Disable the Wi-Fi radios The internet connection and Ethernet devices may remain active. Keep a wired connection available in case it is needed to restore Wi-Fi.
• Power down the complete system Do this only after checking which phone, security, medical, work and smart-home services depend on it.

Router menus differ by manufacturer, internet provider and country. Look for settings labelled Wi-Fi schedule, wireless schedule, bedtime, access control, parental control, pause devices or radio control.

Match the action to the reason

For better sleep: silence notifications, use bedtime mode and keep screens away from the bed.

For children or shared households: pause selected devices or use access profiles.

For lower electricity use: measure the equipment's actual consumption and switch off only non-essential units.

For troubleshooting: restart the router when needed, then investigate repeated faults instead of making nightly reboots a routine.

For security: update the router, use strong credentials and modern encryption rather than relying on an overnight shutdown.

Turning Wi-Fi off is optional, not necessary

You do not need to switch Wi-Fi off at night for health reasons. Leaving a compliant home Wi-Fi network on overnight is generally considered safe by international and national health authorities.

Turning it off may still be worthwhile when it supports a healthier screen routine, household rules or modest energy savings. In most homes, a targeted setting such as Do Not Disturb, a device pause or a Wi-Fi schedule is more useful than unplugging the entire router.

• World Health Organization: base stations and wireless technologies International public-health information about radiofrequency exposure from wireless networks.
• ICNIRP: Wi-Fi Evidence review and information about international radiofrequency exposure guidelines.
• Health Canada: Wi-Fi equipment National guidance and exposure-measurement information.
• ARPANSA: Wi-Fi and health Australian scientific and regulatory guidance about Wi-Fi exposure.