18 providers offer 307 broadband deals in Portsmouth, from £13.50 a month (£18 after 12 months) and up to 5,000 Mbps. Typical measured speed is 129 Mbps down and 34 Mbps up, 28% above the UK download average. Full fibre is available to 94.3% of homes.
Deals for Portsmouth, checked and refreshed daily.
Best value broadband deal in Portsmouth
The best value in Portsmouth on full first-year cost is 4th Utility's 250Mb Full Fibre CityFibre (24 Months): £198 across year one, about £17 a month. 250 Mbps covers streaming, video calls and working from home.
Best value in Portsmouth
250Mb Full Fibre CityFibre (24 Months)
£16.50/mo
for 12 months, then £22/mo
Cheapest broadband deal in Portsmouth
The cheapest deal in Portsmouth is 150Mb Full Fibre CityFibre (24 Months) from 4th Utility at £13.50 a month for 150 Mbps. It's full fibre, so the advertised speed is the speed that reaches the router. The £13.50 is an intro price that rises to £18.00 a month after the intro window, making the real first-year cost £162. Above the UK average on download.
Cheapest in Portsmouth
150Mb Full Fibre CityFibre (24 Months)
£13.50/mo
for 12 months, then £18/mo
Fastest broadband deal in Portsmouth
The fastest deal available in Portsmouth is Full Fibre 5 Gigafast+ from Sky at 5,000 Mbps.
Fastest in Portsmouth
£50/mo
No rises, no surprises.
Compare broadband deals in Portsmouth
£22.99/mo
rises to £26.99 in March 2027 (+£4)
£16/mo
rises to £18 in April 2027 (+£2)
£25/mo
rises to £29 in April 2027 (+£4)
150Mb Full Fibre CityFibre (24 Months)
£18.50/mo
for 12 months, then £23.50/mo
Broadband providers in Portsmouth
18 providers serve Portsmouth including Virgin Media, BT and Vodafone, with Sky the fastest at 5,000 Mbps.
Ranked by Ofcom complaints per 100,000 customers, fewest first. A down arrow is below the industry average, up is above, and a dash means Ofcom publishes no figure for that provider (usually because it is below Ofcom's 1.5% market-share reporting threshold). A small diagonal arrow shows the past-year trend (↘ improving, ↗ getting worse).
Ofcom records the typical Portsmouth download speed at 129 Mbps.
Upgrade nudge
Room to upgrade in Portsmouth
Only 19% of the 61,000 connections here are on 300Mbps or faster, even though 93% can get gigabit.
The faster line is already there. For most of these homes it is the contract holding them back, not the infrastructure.
Is your broadband good enough?
The typical Portsmouth line runs 129 Mbps.
Working from home
GreatStreaming and family use
GoodWhat speeds are people actually getting?
Gigabit reaches 93% of Portsmouth, and the fastest available is 1,000 Mbps. The full split by band is below.
What broadband coverage does Portsmouth have?
Superfast broadband reaches 98% of Portsmouth premises and gigabit 93%, on Ofcom's premise-level data.
Can I rely on mobile broadband in Portsmouth?
Outdoor 5G reaches 100% of Portsmouth homes. Here is how mobile holds up if the line drops.
The two 5G figures differ. “5G availability” is everyday 5G running on the existing 4G core, which is what most phones show. “Next-gen 5G” is standalone 5G: a full 5G network with lower lag, still reaching fewer places.
5G & 4G home broadband
Outdoor 5G covers 100% of Portsmouth, enough for a 5G home-broadband hub to stand in for a fixed line.
Broadband speeds by Portsmouth neighbourhood
| Neighbourhood | Median | vs area | Upload | Superfast | Gigabit | 5G |
|---|---|---|---|---|---|---|
| Nelson PO2 | 139 | +10 | 39 | 98% | 96% | 100% |
| Drayton and Farlington PO6 | 137 | +8 | 24 | 97% | 95% | 100% |
| Eastney and Craneswater PO4 | 130 | +1 | 44 | 100% | 97% | 100% |
| Baffins PO3 | 123 | -6 | 41 | 98% | 98% | 100% |
| St Jude PO5 | 119 | -10 | 27 | 98% | 91% | 100% |
| Charles Dickens PO1 | 117 | -12 | 28 | 95% | 86% | 100% |
Measured Ofcom data per Portsmouth neighbourhood, ranked fastest first. Median and upload are in Mbps; vs area is the median difference from the Portsmouth average; superfast, gigabit and 5G are the % of premises covered. Swipe the table sideways for more columns.
Postcode districts in Portsmouth
Nearby areas
Frequently asked questions
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Speed and coverage figures for Portsmouthcome from Ofcom's Connected Nations data, current to January 2026. Deal prices are pulled live from providers. Compiled by the FindBroadband team. See how we rank and source our data.