Guernsey Speed Test - Check Sure, JT Fiber Internet
Test your internet speed in Guernsey
Guernsey averages 158 Mbps download and 145 Mbps upload on fixed broadband connections as of Q1 2025. Sure and JT serve the island through a fiber-to-the-premises (FTTP) network covering 93% of households by November 2025. Mobile internet averages 85 Mbps on 4G LTE, with full 5G deployment planned for completion by end of 2026. Fiber plans deliver symmetrical speeds from 75 Mbps to 2 Gbps. The States of Guernsey invested GBP 12.5 million in partnership with Sure on a GBP 37.5 million project to achieve 100% fiber coverage by end of 2025, with copper network retirement in 2026. Run this speed test to verify your ISP delivers the Mbps your contract promises.
Internet in Guernsey
Guernsey operates a small-scale but advanced broadband market with 64,781 residents served by near-universal fiber infrastructure across all 10 parishes. Sure holds the majority market share as the network owner and primary operator, offering fiber speeds from 75 Mbps to 2 Gbps symmetrical.
JT and Airtel-Vodafone obtain services through wholesale agreements with Sure, which owns all physical broadband lines on the island. FTTP coverage reached 93% of households by November 2025, up from 50% in mid-2024.
Guernsey's small geographic area (78 square kilometers) and high GDP per capita enabled rapid fiber deployment without the urban-rural gaps seen in larger territories.
Internet Infrastructure in Guernsey
Fiber Broadband
Sure owns and operates the physical fiber network infrastructure across all 10 parishes. JT and Airtel-Vodafone obtain wholesale fiber access from Sure to offer competing retail services. All three providers offer symmetrical upload and download speeds up to 2 Gbps on fiber connections.
Fiber infrastructure uses Gigabit Passive Optical Network (GPON) technology with symmetrical speeds, unlike legacy copper ADSL which maxed at 24 Mbps download and 3 Mbps upload. The island leapfrogged from copper ADSL directly to fiber, avoiding the cable-to-fiber migration path common in larger markets.
DSL and Copper
Approximately 6,500 homes remained on legacy copper by November 2025, with a 12-month migration window before forced disconnection in 2026. The copper network switch-off began November 3, 2025, proceeding in stages throughout 2026. Sure contacts customers once their address becomes fiber-ready, giving them one year to migrate before copper disconnection.
All copper-based broadband and landline telephone services will cease by end of 2026.
Mobile Networks
4G LTE covers 99% of the island as of 2025, averaging 85 Mbps download. Guernsey currently has no cable internet infrastructure.
Satellite Internet
Satellite internet from Starlink operates as an option for the approximately 7% of properties awaiting final fiber connection.
Internet Speed: Urban vs Rural Guernsey
Urban Areas
Urban areas in Guernsey, particularly St Peter Port (19,000 residents) and St Sampson (9,000 residents), achieved fiber coverage earliest in the rollout.
St Peter Port as the capital and main port received priority fiber deployment starting in 2022. The town center and commercial district have had fiber access from Sure, JT, and Airtel-Vodafone since 2023.
St Sampson in the north received fiber rollout in 2023-2024. Both urban centers have full access to 2 Gbps symmetrical fiber from all three providers. Over 90% of properties in St Peter Port and St Sampson connected to fiber by mid-2025.
Rural Areas
Rural parishes received fiber coverage progressively through 2024 and 2025. St Pierre du Bois, Forest, Torteval, and other predominantly rural parishes in the south and west had 80-90% fiber coverage by November 2025. These areas previously relied on copper ADSL delivering 10-24 Mbps download.
Fiber rollout brought symmetrical speeds up to 2 Gbps to remote farms and clifftop properties. The remaining 7% of properties without fiber access by November 2025 are scattered across rural areas, with final connection planned for end of 2025.
Remote and Underserved
Guernsey's small size (78 square kilometers) means no location is truly remote by typical standards. The furthest property from St Peter Port is under 10 kilometers away. This compact geography enabled rapid fiber rollout without the cost barriers facing larger countries.
Urban Areas
Rural areas on Guernsey achieve the same maximum speeds as urban centers once fiber is installed. The urban-rural performance gap is negligible compared to mainland UK or France. All 10 parishes have similar infrastructure quality. The main difference is deployment timeline, with rural areas receiving fiber 1-2 years after urban centers.
Internet Providers & Speed in Guernsey
Sure dominates the Guernsey broadband market as the physical network owner and largest retail provider. Sure owns all fiber infrastructure and sells direct to consumers while also providing wholesale access to JT and Airtel-Vodafone.
Sure offers fiber plans from GBP 48.65 per month (75 Mbps symmetrical with landline included) to premium 2 Gbps service. Sure averages 158 Mbps download speed across all customers according to Q1 2025 data.
Sure also leads mobile with 4G LTE averaging 85 Mbps, and will launch 5G during 2025-2026. Sure acquired Airtel-Vodafone in November 2024, consolidating to two retail brands on the island. Sure provides free connection to fiber with no installation charge.
JT holds the second-largest market share, obtaining wholesale fiber access from Sure. JT has over 200 fiber connections in Guernsey, with more than 70 residential addresses on 500 Mbps or 1 Gbps tiers.
JT was the first provider to offer residential fiber in Guernsey back in 2016, though coverage remained limited until Sure's full-island rollout began in 2022. JT matches pricing to existing non-fiber broadband plans, charging the same monthly rate for fiber in covered areas.
JT completed full fiber rollout in Jersey and brings that operational experience to Guernsey services. JT targets customers seeking alternative branding to the dominant Sure network, though both use identical Sure-owned infrastructure.
Airtel-Vodafone customers began migrating to Sure's network in September 2025 following Sure's acquisition completed in November 2024. Airtel-Vodafone operated as a mobile-first provider, offering fixed wireless and some fiber resale. The brand will phase out as customers transfer to Sure plans.
All three providers offer unlimited data on fiber plans with no caps or throttling.
Internet Speed by Region in Guernsey
St Peter Port (Capital)
St Peter Port as the capital and main port has the most extensive fiber coverage with availability from Sure, JT, and Airtel-Vodafone since 2023. Over 90% of the 19,000 residents connected to fiber by mid-2025. Commercial district and harbor area have redundant fiber routes for business continuity. Average speeds are 150-180 Mbps. Financial services district has dedicated business fiber with guaranteed service level agreements. Residential areas have full access to 2 Gbps symmetrical fiber. 5G deployment will prioritize St Peter Port for initial coverage in 2025.
St Sampson (North)
St Sampson with 9,000 residents received fiber rollout in 2023-2024, slightly after St Peter Port. The town serves as Guernsey's second commercial center with industrial areas and the second harbor. Fiber coverage exceeds 90% by November 2025. Average speeds range from 140-170 Mbps. Industrial zones have business fiber options with higher upload capacity for manufacturing and logistics operations. Residential areas have access to all speed tiers up to 2 Gbps symmetrical.
Southern Parishes (St Martin, St Andrew, Forest, Torteval)
Southern parishes are predominantly rural with clifftop properties, nature reserves, and farmland. Fiber rollout reached these areas in 2024-2025, achieving 80-90% coverage by November 2025. Forest is one of the smaller parishes with large open areas and remote properties. St Martin and St Andrew have mixed residential and agricultural areas. Average speeds after fiber installation match urban centers at 140-180 Mbps. Remaining 10-20% of properties scheduled for fiber connection by end of 2025.
Western and Central Parishes (St Pierre du Bois, Castel, Vale)
Western and central parishes including St Pierre du Bois (predominantly rural with four nature reserves), Castel (largest parish by area), and Vale (northern coastal area) received progressive fiber rollout through 2024. Coverage reached 85-90% by November 2025. Average speeds are 140-170 Mbps on fiber. St Pierre du Bois has extensive countryside walks and remote properties, with final fiber connections scheduled for late 2025. Vale along the northern coast achieved higher coverage rates due to denser housing clusters.
Internet Pricing in Guernsey
Entry-level fiber in Guernsey starts at GBP 48.65 per month from Sure, including landline telephone service. This Basic Fiber tier delivers 75 Mbps symmetrical upload and download, upgraded from 50 Mbps in December 2024 at no extra cost.
Contract and Fees
JT pricing matches existing broadband rates, charging the same monthly fee for fiber as legacy copper service in covered areas. Fiber connection is free from Sure with no installation charge. Most plans require 12-month contracts, though month-to-month options exist at GBP 5-10 premium.
Mid-tier gigabit plans cost GBP 60-75 per month. Sure offers 1 Gbps symmetrical for approximately GBP 70/month. JT has over 70 residential addresses on 1 Gbps fiber. Essential Fiber at 150 Mbps costs GBP 55-60/month, doubled from 75 Mbps in December 2024. These mid-tier plans target households with multiple devices streaming simultaneously or remote workers needing reliable upload capacity.
Premium fiber at 2 Gbps costs GBP 85-95 per month from Sure. This Hyperfast Plus tier delivers 2 Gbps symmetrical upload and download, among the fastest residential internet in the British Isles. Premium plans target large households, content creators, and small businesses operating from home.
Guernsey has no data caps on fiber broadband. All providers offer unlimited data at every speed tier. Router rental typically costs GBP 5/month, though customers can use their own equipment if compatible with GPON fiber standards.
Affordability
At median household income around GBP 50,000/year, a GBP 60/month broadband plan represents about 1.4% of income. Guernsey broadband is mid-priced for the British Isles, more expensive than mainland UK but less than Jersey. The small market size and island geography contribute to slightly higher costs than UK mainland cities.
Network Technology in Guernsey
Fiber Deployment
The government target is 100% fiber by end of 2025 through the States of Guernsey and Sure joint GBP 37.5 million project (GBP 12.5 million public investment). Fiber take-up rate is 73%, meaning nearly three-quarters of households with fiber access subscribe to FTTP service. Over 20,000 properties connected to fiber by November 2025.
Sure upgraded existing fiber tiers in December 2024, increasing Basic Fiber from 50 Mbps to 75 Mbps and Essential Fiber from 75 Mbps to 150 Mbps at no additional cost.
5G Rollout
5G deployment is scheduled for completion by end of 2026 following Sure's GBP 48 million network investment. Sure partnered with Ericsson to build a new mobile network combining Sure and Airtel-Vodafone infrastructure. Coverage will increase by up to 30% while reducing mast count by 30% through site consolidation and newer equipment.
5G will initially deploy in St Peter Port and St Sampson before expanding to all 10 parishes. Expected 5G speeds range from 150-300 Mbps download.
Legacy Technologies
Guernsey skipped cable internet entirely, transitioning directly from copper ADSL to fiber-to-the-premises. This avoided the intermediate cable-to-fiber migration that larger markets like the UK are currently navigating.
The government views universal fiber access as key infrastructure for financial services, the island's primary industry. Mandatory copper switch-off forces laggards to upgrade, ensuring no digital divide between early adopters and holdouts.
How to Choose an ISP in Guernsey
Several factors determine the best provider at your address in Guernsey. Check coverage, compare pricing, and test speeds before signing a contract.
Check FTTP availability at your address
Visit Sure, JT, or Airtel-Vodafone websites and enter your address. Sure's fiber checker shows coverage maps by parish.
Compare fiber plans from Sure and JT
Sure offers Basic Fiber at GBP 48.65/month (75 Mbps symmetrical with landline), Essential Fiber at approximately GBP 55-60/month (150 Mbps), 1 Gbps at GBP 70/month, and Hyperfast Plus 2 Gbps at GBP 85-95/month. JT pricing matches existing broadband rates.
Migrate before the copper deadline
The copper network switch-off began November 2025, with full retirement by end of 2026. Once you receive notification that fiber is available at your address, you have 12 months to migrate before forced disconnection. Book installation early, as providers may have waiting lists approaching the deadline.
Consider 5G Home Internet if fiber is delayed
For the approximately 7% of properties without fiber access by November 2025, 4G LTE fixed wireless provides 50-85 Mbps as an interim solution. 5G will launch during 2025-2026, offering 150-300 Mbps speeds.
Understand all plans are unlimited
Guernsey fiber broadband has no data caps or throttling. Use as much data as needed without overage charges.
As of November 2025, 93% of Guernsey properties have fiber access. If your address is fiber-ready, all three providers can offer service using Sure's physical network. If fiber is not yet available, check the expected connection date. The final 7% of properties should receive fiber by end of 2025.
Choose higher speeds if your household streams 4K video on multiple devices, works from home with large file uploads, or uses cloud backup services. Basic 75 Mbps works for single-person households with light browsing. 150 Mbps supports 2-3 people streaming simultaneously. 1 Gbps handles large households or small businesses.
Installation is free from Sure with no connection charge. The process takes 1-2 hours for a technician to install the fiber terminal and configure service.
Check 4G/5G coverage maps before ordering wireless service. Some remote clifftop properties may have weaker mobile signals than fiber-ready areas.
Router rental costs GBP 5/month or bring your own GPON-compatible equipment. For most households, 150 Mbps Essential Fiber at GBP 55-60/month offers the best value, providing ample speed for streaming, remote work, and gaming without paying for unnecessary capacity.
Compare Internet Providers in Guernsey
The table below shows top providers by connection type and maximum advertised speed.
| Provider | Type | Max Speed |
|---|---|---|
| Sure | fiber | 2000 Mbps |
| JT | fiber | 1000 Mbps |
Test Your Connection Speed
Run a speed test to verify your Guernsey provider delivers advertised speeds. Test during peak evening hours for the most accurate results.
Internet Providers in Guernsey
Compare internet speeds across major providers in Guernsey. Click on a provider to test your connection.
Guernsey Speed Test FAQ
How do I test my internet speed in Guernsey?
Click the Start Test button on this page to measure your download speed, upload speed, and ping latency. The test connects to a nearby server and takes about 30 seconds. For the most accurate results, connect your computer directly to your router with an ethernet cable instead of using WiFi. Close all other applications and browser tabs during the test. Run the test at different times of day, since speeds can drop during peak evening hours between 18:00 and 21:00. Compare your results against the speed your ISP contract guarantees. Fiber plans in Guernsey should deliver symmetrical speeds, meaning upload matches download. If your results consistently fall below the advertised speed, document the tests and contact your provider for troubleshooting or a service credit.
What is the average internet speed in Guernsey?
Guernsey's average fixed broadband download speed is 158 Mbps as of Q1 2025, with mobile averaging 85 Mbps on 4G LTE. Speeds vary by connection type. FTTP fiber delivers 75 Mbps to 2 Gbps download with symmetrical upload. Legacy copper ADSL maxes at 24 Mbps download and 3 Mbps upload, but the copper network is shutting down by end of 2026. 4G LTE provides 50-85 Mbps for fixed wireless service. 5G launching in 2025-2026 will offer 150-300 Mbps. Geographic location has minimal impact on speed due to the island's small size of 78 square kilometers. Urban St Peter Port and rural parishes achieve the same maximum speeds once fiber is installed. Guernsey ranks among the fastest broadband speeds in the British Isles on a per-capita basis.
When will fiber be available at my address?
Fiber coverage reached 93% of Guernsey households by November 2025, with a target of 100% by end of 2025. The States of Guernsey and Sure joint GBP 37.5 million infrastructure project is completing the final 7% of properties. Check availability by entering your address on Sure's fiber checker at sure.com/guernsey/broadband-and-home/fibre-broadband/fibre-checker or the JT website. If fiber is not yet available, the tool shows expected connection dates. Most remaining properties in rural parishes should receive fiber by December 2025. All customers must migrate from copper to fiber by end of 2026, when the legacy network shuts down permanently. Sure contacts customers once their address becomes fiber-ready, providing a 12-month migration window before forced disconnection.
What happens to copper broadband in Guernsey?
The copper network switch-off began November 3, 2025, proceeding in stages throughout 2026. All copper-based ADSL broadband and landline telephone services will cease by end of 2026. Customers receive notification once fiber is available at their address, with 12 months to migrate before disconnection. Approximately 6,500 homes remained on copper by November 2025, down from 18,000 in 2024. Legacy copper delivered maximum 24 Mbps download and 3 Mbps upload, while entry-level fiber starts at 75 Mbps symmetrical. There is no option to stay on copper past the 2026 deadline. The forced migration ensures universal fiber adoption and allows Sure to decommission expensive copper maintenance. Installation is free from Sure with no connection charge. The switch-off applies to all 10 parishes across Guernsey.
Which ISP has the fastest internet in Guernsey?
Sure delivers the fastest average download speed at 158 Mbps according to Q1 2025 data from Fair Internet Report. However, all three providers (Sure, JT, Airtel-Vodafone) use the same physical fiber network owned by Sure, so maximum speeds are identical. All three offer symmetrical fiber up to 2 Gbps in covered areas. Sure upgraded all fiber tiers in December 2024, increasing Basic Fiber from 50 Mbps to 75 Mbps and Essential Fiber from 75 Mbps to 150 Mbps. Sure's Hyperfast Plus at 2 Gbps symmetrical is among the fastest residential internet in the British Isles. The fastest connection available depends on your chosen plan, not the provider. JT has over 70 residential addresses on 1 Gbps fiber. For mobile, Sure leads 4G performance at 85 Mbps average, with 5G launching in 2025-2026 targeting 150-300 Mbps.