Start with the pattern
A problem that appears at about the same time each day is a useful clue. Slowdowns and dropouts tied to the clock are often driven by demand (yours or your neighbors’) or by something scheduled to run at that time. The first job is to work out whether the trouble is in your home network or beyond it.
Common causes of evening and overnight problems
Peak-time congestion
In the early evening, many households stream, game and make video calls at the same time. Shared parts of your provider’s network can get busy, which may slow everyone on that segment. This is outside your control, but you can gather evidence to show your provider.
Too much going on in your own home
More people and devices online at once means more competition for your connection. A few simultaneous 4K streams, game downloads or video calls can use a lot of your plan’s bandwidth, and weaker Wi-Fi spots suffer first. See how many devices your router can handle.
Overnight updates and backups
Phones, consoles, smart TVs, computers and cloud backup services often schedule large downloads for the small hours. These can slow other devices or, if a device is struggling, cause drops. Check update and backup schedules on devices that stay on overnight.
Provider maintenance
Providers sometimes carry out maintenance or push updates to equipment during quiet hours, which may cause brief outages. If drops happen at a precise time each night, ask your provider about maintenance windows or check their status page or app.
Device power-saving settings
Laptops, phones and Wi-Fi adapters may reduce or turn off wireless activity when idle, which can look like Wi-Fi dropping overnight. Look at the power management settings for the network adapter on the affected device.
A scheduled Wi-Fi shutoff or router restart
If someone set a timer on the router, a smart plug or a provider app, your Wi-Fi might be going off by design. Check the router’s schedule and any plugs on timers. See how to set a timer or schedule on your Wi-Fi router to review or remove it.
Interference
Other networks, appliances and electrical equipment that switch on in the evening can add interference, especially on the crowded 2.4 GHz band. Using the 5 GHz band where possible (see dual-band vs tri-band routers), or changing the Wi-Fi channel, may help.
Router heat or aging equipment
A router that runs hot, or is old, may struggle at busy times. See whether a hot router can slow your internet.
Test before you blame the provider
- Run a speed test over Ethernet. Plug a laptop directly into the router with a cable and test during a slow spell. Note the download, upload and latency results.
- Run the same test over Wi-Fi in the same room.
- Compare. If the cable result is fine but Wi-Fi is slow, the issue is probably your wireless setup. If both are slow at the same time each evening, the line or provider is more likely.
- Repeat on a few evenings and also at a quiet time of day. Keep a note of times and results.
- Pause other devices during a test to see if one is hogging bandwidth.
Fixes to try at home
- Restart the modem and router once and see whether the problem returns the next night. Turn off and wait briefly before restarting.
- Move closer or reposition the router to a central, open spot.
- Use 5 GHz for devices near the router, and keep 2.4 GHz for far-away or simple devices.
- Change the Wi-Fi channel if neighbors’ networks overlap yours.
- Update the router’s firmware and, where relevant, the network drivers on affected computers.
- Reschedule heavy downloads and backups to run at a different time, or set limits.
- Prioritize traffic. Some routers have quality of service settings that favor video calls or gaming.
- Disable power-saving on the Wi-Fi adapter of a laptop that drops overnight.
- Check router schedules and smart plug timers.
- Consider upgrading the router or adding a mesh node if coverage is the issue.
When to contact your provider
If a cable test shows slow speeds or drops at the same times each day, or your connection fails at an exact time every night, contact your provider with your notes. Tell them the times, the test results and what you have already tried. Ask whether there is congestion or maintenance in your area, and whether a different plan or technology (such as full fibre where available) is an option. Do not pay for an upgrade until you have confirmed the cause.
Should you turn Wi-Fi off at night as a fix?
Switching Wi-Fi off overnight will not fix evening congestion, but it can prevent overnight drops from becoming a nuisance if nothing needs the connection. If you want to evaluate it, read should you unplug your router at night.
Frequently asked questions
Why does my internet speed slow down at night? Commonly because of heavy use in the evening, both in your home and across your provider’s network.
Why does my Wi-Fi keep disconnecting at night? Possible reasons include power-saving settings, scheduled restarts, provider maintenance, interference or a struggling router.
Why turn the Wi-Fi off at night? Some people do it to reduce screen time or save a little electricity. It is optional for most homes.