Why is my router overheating in this weather?
Because your router is generating heat of its own, and a hot room gives it nowhere to dump it. It sits on a shelf working through the night, no day off, ever. When the room hits 25 or 30 degrees, that heat has nowhere to go, so it builds up inside the case. The result is router overheating: the connection slows, drops, or the whole box quietly reboots itself.
It isn’t only the router. During a heatwave, more of your street is home at once, streaming, gaming, on video calls. The local network gets busier right when your own kit is struggling. A hot router plus a crowded cabinet down the road is usually the real story behind broadband that feels sluggish exactly when the sun comes out.
We like this one, because router overheating is genuinely easy to fix, and it costs nothing. The hard part is telling “it’s just warm” from “something’s actually broken”.
Most home routers are rated to run reliably up to around 35 to 40 degrees inside the case. A shelf in direct sun, above a radiator, or wedged into a warm cupboard can nudge past that on an otherwise ordinary day. Once the internal temperature climbs, the router throttles itself to cope, and that’s the exact moment your video call starts freezing.
Router overheating at a glance
Checked August 2026. Use this table to work out whether you’re dealing with router overheating or a fault worth reporting to your provider.
| Symptom | Likely cause | What to do |
|---|---|---|
| Slower speeds only in the afternoon heat | Router overheating or crowded local network | Move the router, improve airflow, retest in the evening |
| Router feels hot to touch, lights flashing oddly | Router overheating | Switch off, let it cool, reposition away from sun |
| Total loss of service for more than a day | Line or network fault, not heat | Report it, you may be owed automatic compensation |
| Speeds have been poor for weeks, whatever the weather | Contract, package or line issue | Check your contract end date and compare deals |
How do I stop my router overheating?
Fixing router overheating usually takes five minutes and no tools. Start with where the router actually sits, because that’s the root of most cases. Roo’s advice on this one is blunt: your router wants shade, not a suntan.
Key takeaways
- Keep it out of direct sunlight and off a sunny windowsill.
- Give it open space on all sides, not a cupboard or a stack of books.
- Stand it upright on a hard, cool surface rather than carpet or fabric.
- Keep pets and cushions away from the vents on top and underneath.
- Unplug it for a minute if it feels hot, then let it restart cold.
Our own router placement guide covers the year round version of this, useful if dead spots are your usual complaint rather than a summer slowdown. Sort the shelf, then watch performance over 48 hours before you decide anything is actually broken.
Still running warm within minutes of being switched back on? Worth asking your provider whether the unit needs replacing. An older router labours harder to do the same job. It generates more heat doing it, and it’s simply more prone to overheating than anything newer.
What counts as normal broadband speed in 2026?
Checked August 2026, according to Ofcom’s Connected Nations 2025 report, the UK’s average maximum download speed reached around 285 Mbps, up from roughly 223 Mbps the year before, a rise of almost 30 percent. Gigabit capable networks now pass about 87 percent of UK premises.
Those are averages across very different connections. Your own normal depends on whether you’re on full fibre, cable, or an older copper line. Speed test result way down on what you usually get, same connection, same time of day you’d normally test? That points to router overheating or local congestion, not a fault with the line itself. If the slowdown shows up every evening rather than just in a heatwave, our guide to evening broadband slowdown covers the congestion side properly.
What are my rights if it’s not just the heat?
Checked August 2026. If your broadband has a genuine total loss of service, not just slower speeds, Ofcom’s automatic compensation scheme can pay out without you having to ask. Current rates include £10.34 a day for an unrepaired loss of service, starting from the third working day after you report it, and £6.46 a day if a new service starts late. Our broadband compensation guide explains exactly when it applies and what doesn’t qualify. The scheme now covers most major providers, reaching an estimated 97 percent of landline and 91 percent of broadband customers in the UK, though a slow patch caused by router overheating on a hot afternoon won’t usually meet the bar on its own.
One more thing worth knowing: since January 2025, providers have to show any in contract price rise in pounds and pence upfront, not buried in an inflation linked percentage. So if a summer of poor performance has you eyeing the door, at least the small print on what a new deal will cost you is easier to actually read now.
Is it time to compare broadband deals?
Doing nothing is the default. It’s usually the expensive one too. Ruled out router overheating, cleared the vents, given it 48 hours, and speeds are still nowhere near what you’re paying for? That’s a fair signal to see what else is out there, rather than quietly living with it until next summer.
A quick comparison costs nothing. It takes less time than waiting for your router to cool down.
- Can heat actually break my router permanently?
- Rarely. Most router overheating just means a temporary slowdown or a reboot, and it recovers on its own once it cools. Months of prolonged extreme heat can shorten a router’s lifespan. One hot week won’t kill it.
- Should I turn my router off overnight in hot weather?
- You don’t have to. But a short break during the hottest part of the afternoon won’t hurt, and it’s a quick way to rule out router overheating if you keep seeing odd drop outs.
- Does a heatwave affect the broadband line outside my house too?
- Not much. Street cabinets and exchange equipment are built for UK summers, so widespread outages from heat alone are rare. Most of what people notice is their own router overheating indoors, not the network outside.
- My speeds are still poor now the weather has cooled. What next?
- Run a speed test at a quiet time of day and check it against what your package promises. Consistently short? That points to a fault, or a package that no longer suits you, and it’s worth comparing broadband deals rather than just accepting it.
