Why is my internet slow at night or at peak times?
If your internet is only slow in the evenings, it’s almost always peak-time congestion — lots of people in your area online at once, sometimes combined with busy Wi-Fi at home. Confirm it by comparing a speed test at a quiet time with one at peak. Full-fibre (FTTP) lines cope with busy periods far better than older part-fibre or cable.
Last updated: · Written by The NetSorted team
If your connection is fine all day but crawls at night, you’re almost certainly seeing peak-time congestion. Here’s why, and what helps.
What causes evening slowdowns
In the evening, lots of people in your area get online at once — streaming, gaming and browsing. Networks share capacity, so when demand peaks, speeds can dip. This is called congestion (or contention). It’s most noticeable on older part-fibre and cable connections.
Confirm it’s congestion
Run the speed test at a quiet time (mid-morning) and again at peak (mid-evening). A clear drop at peak points to congestion rather than a fault.
Also rule out your own home first: if it’s only slow on Wi-Fi, see fix slow Wi-Fi.
What you can do
- Schedule big downloads and backups overnight, off peak.
- Check it isn’t your Wi-Fi by testing wired.
- Consider full fibre (FTTP) — it has far more headroom at busy times than older connections.
If it’s slow at all times, not just evenings, that’s different — work through why is my internet so slow?.
Frequently asked questions
Why is my internet slower in the evening?
Evenings are peak time, when many people in your area are online at once. Some networks slow under that load — called congestion or contention. If you’re only slow roughly between 7pm and 11pm, that’s the likely cause.
How do I prove it’s peak-time congestion?
Run a speed test at a quiet time (say mid-morning) and again at peak (mid-evening). A big drop at peak points to congestion rather than a fault.
Can I fix evening slowdowns?
You can’t fix the wider network, but you can schedule big downloads for overnight, make sure it isn’t your own Wi-Fi, and consider a full-fibre line, which handles busy periods much better.
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