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How Fast is Broadband in Cardiff West?

Based on real-world speed tests collected by ThinkBroadband in Q3 2025, Cardiff West has a median download speed of 71.9 Mbps and a median upload speed of 22.7 Mbps.

This constituency has "Good" download speeds and "Moderate" upload speeds. The 22.7 Mbps median upload is adequate for most home working and video call needs, though heavy uploaders may want to seek full fibre connections.

Speed Comparison for Cardiff West

Download Speeds
Bottom 20%37.1 Mbps
Median71.9 Mbps
Mean119.9 Mbps
Top 20%148 Mbps
Upload Speeds
Bottom 20%7.1 Mbps
Median22.7 Mbps
Mean26.2 Mbps
Top 20%42.2 Mbps

Understanding the Speed Data

The speed data shows the distribution of actual speeds achieved by users in Cardiff West:

What the Numbers Mean

  • Bottom 20%: Slowest fifth of connections
  • Median: Typical speed (50% faster, 50% slower)
  • Mean: Mathematical average
  • Top 20%: Fastest fifth of connections

Why Median Matters Most

The median is the most reliable measure of typical performance. Unlike the mean, it isn't skewed by extremely fast or slow connections. If you move to Cardiff West, you can expect speeds around 71.9 Mbps download and 22.7 Mbps upload.

Broadband Coverage in Cardiff West

Coverage statistics from Ofcom show what connection types are available in this constituency:

99.9%
Superfast (30Mbps+)
88.6%
Full Fibre (FTTP)
95.3%
Gigabit Capable

Cardiff West has very good full fibre coverage at 88.6%. Most residents can access full fibre connections with symmetric upload speeds.

Speed Recommendations for Cardiff West

Based on the actual speeds in Cardiff West, here's what different activities require:

Video Conferencing (Zoom, Teams)

Download needed: 10-25 Mbps
Upload needed: 5-10 Mbps

Typical speeds in this constituency are adequate for this activity.

Cloud Backup & File Uploads

Download needed: 10+ Mbps
Upload needed: 20+ Mbps

Typical speeds in this constituency are adequate for this activity.

Online Gaming

Download needed: 25-50 Mbps
Upload needed: 5-10 Mbps

Typical speeds in this constituency are adequate for this activity.

Multiple Users (4+ devices)

Download needed: 100+ Mbps
Upload needed: 20+ Mbps

May need a faster connection for optimal performance.

Frequently Asked Questions

What is the average broadband speed in Cardiff West?

In Cardiff West, the median download speed is 71.9 Mbps and the median upload speed is 22.7 Mbps. The top 20% of connections achieve 148 Mbps download and 42.2 Mbps upload.

Is full fibre broadband available in Cardiff West?

Yes, full fibre (FTTP) broadband is available to 88.6% of properties in Cardiff West. Gigabit-capable broadband covers 95.3% of premises.

How does Cardiff West compare for upload speeds?

Cardiff West has moderate upload speeds with a median of 22.7 Mbps. This is important for video calls, cloud backups, and working from home.

About This Data

Speed data is sourced from ThinkBroadband (Q3 2025 measurements). Coverage data from Ofcom Connected Nations 2025. Actual speeds at your address may vary based on connection type, provider, and network conditions.