Maxis Fibre Slow at Night? Causes & Fixes (2026)
Internet crawling every night around 8–11pm but fine in the morning? You’re not imagining it — and in most cases it’s not your Maxis Fibre line that’s the problem. It’s how the network and your WiFi behave at peak hours. Here’s how to tell what’s actually wrong, and fix it tonight.
Quick answer
  • Night slowdown is almost always peak-hour congestion (8–11pm) or your WiFi — not the fibre line itself.
  • Fastest test: plug a laptop straight into the router with a LAN cable and run a speed test. Full speed wired = WiFi problem. Slow even wired = line, plan or area.
  • If your plan is too small for a busy household at night, the real fix is fixing WiFi or moving up a speed tier.

First: is it your Fibre line or your WiFi?

Most “slow fibre” at night is really WiFi struggling, not the fibre. The 2-minute test: connect one device by LAN cable to the router and run a speed test at the slow time. Then compare:
What you see Likely your WiFi Likely the line / plan
Wired cable testFull speed ✅Still slow ❌
Only far rooms slowYes (coverage)No
All devices slow at the same time nightlySometimesYes (congestion / plan)
Fine in morning, slow 8–11pmMaybePeak-hour congestion

Why fibre feels slower at night — the real causes

  1. Peak-hour congestion (8–11pm). Everyone in the neighbourhood streams, scrolls and games at once. Like a highway at rush hour — same road, more cars. This affects every ISP, not just Maxis.
  2. 2.4GHz vs 5GHz WiFi. The 2.4GHz band gets crowded at night by neighbours’ routers and devices. Connecting to the 5GHz band is faster and far less congested.
  3. Too many active devices. Phones, TVs, CCTV, tablets and consoles all wake up in the evening and share the same WiFi.
  4. Router placement / old router. A router hidden in a cabinet, far from your room, or an older WiFi 5 unit struggles when the network is busy.
  5. Background downloads & updates. Phones and PCs often run big updates at night, quietly eating bandwidth.

Fix it tonight

  • Connect to the 5GHz WiFi name (often ends with “-5G”).
  • Move the router to an open, central, elevated spot — not inside a cabinet.
  • Restart the router once (clears congestion and re-picks a cleaner channel).
  • Use a LAN cable for your TV, PC or gaming console.
  • Pause big background downloads during peak hours.
  • For a large or multi-floor home, add mesh WiFi (e.g. Max WiFi by Maxperts) so every room gets a strong signal.

When it’s the plan, not the WiFi

If your wired speed is also slow at peak and your household is heavy (several 4K streams plus gaming), your plan may simply be too small for the evening load. Maxis Home Fibre tiers:
  • 300Mbps — RM99 (Postpaid bundle): good for most families.
  • 500Mbps — RM139: more headroom for busy evenings & many devices.
  • 1Gbps — RM159: heavy WFH, gaming and multi-device homes.
Moving from 300Mbps to 500Mbps/1Gbps gives breathing room when the whole house is online at night. If your area has no fibre port, Maxis 5G Home WiFi (RM79 / RM109 / RM129) is an alternative — but signal must be checked first.
It’s a WiFi fix if…
wired speed is full, only far rooms or some devices are slow.
Upgrade speed if…
wired is also slow at peak and your household is heavy.
Check coverage if…
the line under-performs all day, or you have no fibre port.
Not sure if it’s your WiFi, your plan, or your area?
Send your address and we’ll check your line, recommend the right fix, and tell you the best speed tier — no charge to check.
🔍 Check my coverage & best plan

Common questions

Why is my Maxis Fibre only slow at night?
Usually peak-hour congestion (8–11pm) plus crowded WiFi bands. The fibre line itself is normally fine — a wired speed test confirms it.

How do I know if it’s my WiFi or the fibre line?
Plug a laptop into the router with a LAN cable and run a speed test. Full speed wired = WiFi issue. Slow even wired = line, plan or area.

Will upgrading my plan fix the night slowdown?
If your wired speed is also slow at peak and the household is heavy, a higher tier (500Mbps/1Gbps) helps. If it’s a WiFi problem, fix the WiFi first — a faster plan won’t help.

Is 5G Home WiFi better at night than fibre?
Usually no — fibre is more stable at peak. 5G depends on tower congestion. It’s the better choice mainly when your address has no fibre port.

Does Maxis throttle fibre at night?
Home Fibre plans are not data-throttled. Night slowdowns are congestion or WiFi, not throttling.

Related guides

Still slow after trying the fixes?
Send your address — we’ll check your Maxis line and recommend the right plan or setup.
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