19 providers offer 283 broadband deals in Marine, from £13.50 a month and up to 5,000 Mbps. Typical measured speed is 61 Mbps down and 18 Mbps up, 40% below the UK download average.
Best value broadband deal in Marine, Arun (PO21)
The best value in Marine, Arun (PO21) on full first-year cost is Plusnet's Full Fibre 145: £292 across year one, about £24 a month. A £155 reward card is bundled in. 145 Mbps covers streaming, video calls and working from home.
Best value in Marine, Arun (PO21)
£22.99/mo
rises to £26.99 in March 2027 (+£4)
Avg £26.32/mo over contract · £632 total over 24 months
Fastest broadband deal in Marine, Arun (PO21)
The fastest deal available in Marine, Arun (PO21) is Full Fibre 5 Gigafast+ from Sky at 5,000 Mbps.
Fastest in Marine, Arun (PO21)
Full Fibre 5 Gigafast+
3000 Mbps upload · Full Fibre
Best for power users & big households
£80/mo
No rises, no surprises.
£1925 total over 24 months
Cheapest broadband deal in Marine, Arun (PO21)
The cheapest deal in Marine, Arun (PO21) 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. giffgaff is essentially level at £15.00 a month. Above the UK average on download.
Cheapest in Marine, Arun (PO21)
150Mb Full Fibre CityFibre (24 Months)
150 Mbps upload · Full Fibre
Best for 2–3 person homes, 4K streaming
£13.50/mo
for 12 months, then £18/mo
Avg £15.75/mo over contract · £378 total over 24 months
Runner-up on price
£5/mo
for 6 months, then £25/mo
Avg £20/mo over contract · £480 total over 24 months
Compare broadband deals in Marine, Arun (PO21)
£5/mo
for 6 months, then £25/mo
Avg £20/mo over contract · £480 total over 24 months
£29/mo
rises to £31 in April 2027 (+£2)
Avg £30.50/mo over contract · £732 total over 24 months
Sky Full Fibre Gigafast
100 Mbps upload · Full Fibre
Best for power users & big households
£31/mo
No rises, no surprises.
£749 total over 24 months
150Mb Full Fibre CityFibre (24 Months)
150 Mbps upload · Full Fibre
Best for 2–3 person homes, 4K streaming
£18.50/mo
for 12 months, then £23.50/mo
Avg £21/mo over contract · £504 total over 24 months
Broadband providers in Marine, Arun (PO21)
19 providers serve Marine, Arun (PO21), 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 Marine, Arun (PO21) download speed at 61 Mbps.
Upgrade nudge
Room to upgrade in Marine, Arun (PO21)
Only 6% of the 11,000 connections here are on 300Mbps or faster, even though 80% 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 Marine, Arun (PO21) line runs 61 Mbps.
Working from home
OKStreaming and family use
OKWhat speeds are people actually getting?
Gigabit reaches 80% of Marine, Arun (PO21), and the fastest available is 1,000 Mbps. The full split by band is below.
Which broadband networks reach Marine, Arun (PO21)?
The wholesale networks carrying Marine, Arun (PO21) broadband, from Openreach to Virgin Media and the altnets, read off the live deals.
Live altnets in Marine, Arun (PO21), drawn from the providers actually selling deals here. Where they reach, the gigabit prices are normally the lowest on the page.
- CityFibre: Sky, TalkTalk, The One Broadband, Vodafone, Zen Internet
- 4th Utility: 4th Utility, Rise Fibre
Add to the list Openreach and Virgin Media O2 (Openreach is built out to roughly every house in the country).
We are seeing 19 providers selling deals into Marine, Arun (PO21) today.
What broadband coverage does Marine, Arun (PO21) have?
Superfast broadband reaches 100% of Marine, Arun (PO21) premises but gigabit only 80%, so around 20% of homes can get fast broadband but not the fastest.
Can I rely on mobile broadband in Marine, Arun (PO21)?
Outdoor 5G reaches 100% of Marine, Arun (PO21) homes. Here is how mobile holds up if the line drops.
5G & 4G home broadband
Outdoor 5G covers 100% of Marine, Arun (PO21), enough for a 5G home-broadband hub to stand in for a fixed line.
How Marine, Arun (PO21) compares within Arun
Across 5 postcode districts in Arun, by premises count, typical speed and gigabit coverage.
Nearby areas
Frequently asked questions
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* Based on Go.Compare research estimating that 28% of UK broadband users pay for faster broadband speeds than they need (which we interpret as overpaying), equivalent to around 7.5m UK households.
Speed and coverage figures for Marine, Arun (PO21)come 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.