Train
Driving
Porthmadog to Portsmouth
Updated: 29 May 2026
The journey from Porthmadog to Portsmouth covers approximately 400 km. By car, you will travel along the A487, A55, M56, M6, and M3. The train journey requires multiple changes, typically at Bangor, Crewe, and then a connection to Portsmouth. Portsmouth is a major naval city known for its historic dockyard. Expect the drive to take around 5 hours 30 minutes.
Total Distance: 400 km driving, 300 km air distance.
Fastest Way
Driving via the M3 is the fastest, taking 5 hours 30 mins.
Cheapest Way
Driving is the most cost-effective for groups.
Compare Porthmadog to Portsmouth Routes
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Connecting
|
Direct
|
|
|---|---|---|
| Duration | 7 hours | 5 hours 30 mins |
| Avg Price | 120-220 GBP | 90-150 GBP |
| Operator | Transport for Wales, Avanti West Coast, South Western Railway | N/A |
| Route | Cambrian Coast Line, West Coast Main Line, CrossCountry route | A487, A55, M56, M6, M3 |
| Tip | Portsmouth Harbour station is centrally located and easy to navigate. | The M3 is the primary route; check for congestion near Portsmouth. |
Travel Tips
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ParkingUse the Gunwharf Quays car park for central access.
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Rail TicketsBook in advance to secure the best fares.
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TrafficThe M3 is busy; check for roadworks before leaving.
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WalkingPortsmouth city center is very walkable.
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TransportUse the local bus network for easy city travel.
Safety Tips
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DrivingBe cautious of heavy traffic on the M3.
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Night SafetyStick to well-lit areas in the city center at night.
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EmergencyQueen Alexandra Hospital is the main hospital.
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Personal SafetyKeep your belongings secure in busy areas.
People Also Ask
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Is there a direct train?No, you must change at least twice.
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How long is the drive?Approximately 5.5 hours.
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Is the M3 busy?Yes, it is a major motorway with heavy traffic.
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What is the best way to travel?Driving is generally more direct.
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Is Portsmouth a good city to visit?Yes, it has a rich naval history.
Quick Info
- From Porthmadog, Gwynedd, United Kingdom
- To Portsmouth, Hampshire, United Kingdom
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Modes
Best Time to Travel
Spring and Summer for exploring the city's historic sites.
Things to Do in Portsmouth
1
Historic Dockyard
Explore the historic naval ships and museums.
2
Spinnaker Tower
Enjoy panoramic views of the city and harbor.
3
Southsea Castle
Visit the historic castle built by Henry VIII.
4
Portsmouth Museum
Discover the city's history and art collections.
Tags
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