topic Re: Slow internet speeds same time every night in Broadband

Slow internet speeds same time every night

Ste1983 — Tue, 30 Sep 2025 21:07:02 GMT

My internet speeds drop every night between 8pm to 12am every night for the past month.

its so slow that I can't watch a live Prime football match without it becoming incredibly pixelated.

I have Sky 500 package and the speed checks each evening are coming back at 6.1mbps.

I need help

Re: Slow internet speeds same time every night

Chrisee — Wed, 01 Oct 2025 05:14:52 GMT

@Ste1983 if you are testing on a device connected by WiFi to the hub it is proably an issue with poor wifi signal getting affected by interference from your neighbours' networks. If so the answer is improve the WiFi in your home either by getting an extender from Sky as part of their WiFi Max package or but your own wifi equipment and use that in p,axe of the Sky hub's WiFi. Alternstively if practical usexan ethernet cable to watch football which is both cheaper and will be free from interference.

Re: Slow internet speeds same time every night

Ste1983 — Wed, 01 Oct 2025 07:47:10 GMT

I don’t think this is a WiFi signal issue though. My devices have been running fine on WiFi for over a year with stable speeds throughout the day. The slowdown only started about 4 weeks ago, and now it happens suddenly at around 8pm every evening for a few hours. That timing makes it seem more like network congestion or traffic management on the ISP’s side, rather than interference within my home.

The router is less than 3 metres away from my main devices, and the WiFi signal strength has always been strong, so local interference doesn’t really fit the pattern.

Has anyone else noticed similar evening slowdowns recently, or found a way around it?

Re: Slow internet speeds same time every night

JimM1 — Wed, 01 Oct 2025 08:08:12 GMT

@Ste1983 If it is network congestion there will be not much at all you can do about it, you should Ethernet speed test before and at peak times to see what the result's are, wi-fi is very misleading to get good results for that condition.

Re: Slow internet speeds same time every night

Ste1983 — Wed, 01 Oct 2025 08:44:21 GMT

I’ll give some Ethernet speed tests a go and compare them with my WiFi speeds, both before and during the slowdown hours. Hopefully that will show whether the issue is happening before the speeds even reach my router, or if it’s something happening on the WiFi side.

Re: Slow internet speeds same time every night

JimM1 — Wed, 01 Oct 2025 08:58:49 GMT

@Ste1983 Here is some OR Blurb that will possibly help, i find sometimes on my FF500 connection that drop down speed is 200Mb/s slowest i have seen it so far due to the Network being real busy!

1. FTTP is a contended service, up to 32 users can be sharing the 2.5Gb backhaul, so you can never expect the full speed all the time, you may get 900mb when there are fewer people using it. I expect that you are sharing the backhaul with many users. If everyone was using it fully, you may only get 78mbs. Its called statistical multiplexing, which relies on the fact that all users are not utilising their connection fully, all of the time.

BT quote up to 900mb, so you are likely to get much less than that during peak times.

Speed tests pass very little data, so normally give a much higher speed.

2. The max OR connect to a splitter is 30 ( 32 is the splitter maximum but policy is 30 ) not every CBT port provided is likely to have a customer using it , so unless on a ‘new site’ that has no alternatives to OR FTTP the actual number on a splitter is likely to be way less , OR currently have about a 30% take up, so maybe 10 users per splitter , plus the majority don’t take 900Mb but slower profiles , and the chances of those ‘on line ‘ at any one time all and doing something intensive, rather than browsing / Netflix that may be consuming less than 30-100Mb , is slim , that’s why there is a 700Mb minimum speed guarantee on 900Mb …..the 2.4Gb will be plenty ,you would have to be incredibly unlucky to have any consistent congestion.

If you suspect PON congestion, try at a time when there won’t be much activity, late evening or early morning .

Although you have tried somethings to ‘ isolate’ the problem , the most obvious thing to do ( that you haven’t apparently tried ) is use the BT router , without doing that , you haven’t really proved anything , your third party router may great , but even great routers can be mis configured or faulty

Re: Slow internet speeds same time every night

jamesn123 — Wed, 01 Oct 2025 10:42:11 GMT

@Ste1983 Is it almost exactly 8pm every night? If so it could be something interfering thats set to a timer or comes on at a similar time each evening.

Re: Slow internet speeds same time every night

Tony012334 — Wed, 02 Sep 2026 21:10:38 GMT

Hello. Were you able to resolve the issue? I have the same problem.

Re: Slow internet speeds same time every night

Tony012334 — Wed, 02 Sep 2026 21:11:40 GMT

Did you resolve this?

Re: Slow internet speeds same time every night

Me134 — Thu, 03 Sep 2026 06:43:17 GMT

@Tony012334 wrote:
Hello. Were you able to resolve the issue? I have the same problem.

We're only other customers here, like yourself. you're also replying to a thread that is around 1 year old and the OP hasn't been seen since so unlikely to get an answer from them.

I see you'e created your own thread so I'll leave any answers to that one.

Re: Slow internet speeds same time every night

Ste1983 — Thu, 03 Sep 2026 06:54:29 GMT

Hi, I had no response from Sky, however after a few months of the issue it seemed to resolve itself.

Re: Slow internet speeds same time every night

Chrisee — Thu, 03 Sep 2026 07:26:51 GMT

@Tony012334 the most likely cause of a loss of WiFi speed at a regulsr time is interference frim a deviceceither in or near your home. You can test this by comparing speeds of a device connected by Ethernet with your WiFi devices. While it is possible for partial fibre broadband speeds to vary that is far rarer.

Finding the cause of the interference is never easy as virtually any device can potentially be the culpret. Somebody using a microwave that has a slight radiation leak is one possibility, a dodgy fluorescent light us another, one long running issue a few years back was down to a dodgy aquarium tank system but it can literally be anything . Often as in the OP's case it sorts itself. While the issue is most probsbly in your home it could be close by. Sky normally can only suggest rrebooting the hub which can help if the cause is interference from a neighbour's WiFi.