Current Time in Merthyr Tydfil, Wales
The live time in Merthyr Tydfil (Merthyr Tydfil), with the GMT or BST status, the next clock change and sunrise and sunset through the year.
About time in Merthyr Tydfil
Merthyr Tydfil was once the largest town in Wales, grown on iron during the Industrial Revolution. The world's first steam-locomotive railway journey took place here in 1804, when Richard Trevithick's engine hauled a load along the Penydarren Tramroad. The Brecon Beacons National Park, with Pen y Fan, lies just to the north.
The Cyfarthfa Castle and ironworks show how rich the ironmasters became, and the Cyfarthfa Ironworks supplied rails to many railways worldwide. Today the area is known for outdoor activities and Gateway to the Beacons.
The town is at 3.4 degrees west of Greenwich, so solar noon is about 14 minutes after the clock. Merthyr is around 50 minutes from Cardiff by train.
- The first steam-locomotive journey was in 1804.
- Once the largest town in Wales.
- Close to the Brecon Beacons.
About 44,000 people live in Merthyr Tydfil. At 51.75 degrees north and 3.38 degrees west of Greenwich, true solar noon here falls about 14 minutes after clock noon. The clock itself always matches the rest of the UK.
Sunrise and sunset in Merthyr Tydfil through the year
Times for the 15th of each month in UK local time (GMT or BST). Calculated from the city's latitude and longitude.
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 08:13 | 16:32 | 8h 19m |
| February | 07:28 | 17:27 | 9h 59m |
| March | 06:28 | 18:17 | 11h 49m |
| April | 06:18 | 20:10 | 13h 52m |
| May | 05:21 | 20:59 | 15h 38m |
| June | 04:54 | 21:33 | 16h 39m |
| July | 05:12 | 21:26 | 16h 14m |
| August | 05:57 | 20:37 | 14h 40m |
| September | 06:47 | 19:29 | 12h 42m |
| October | 07:37 | 18:20 | 10h 44m |
| November | 07:31 | 16:23 | 8h 52m |
| December | 08:13 | 16:03 | 7h 50m |
Merthyr Tydfil time compared with the world
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Time in nearby cities
Clock change guides
- What Is Daylight Saving Time (DST)? A Plain-English GuideWhat daylight saving time is, how it works in the UK, Europe and the US, why it exists, its history, who uses it and the argument over scrapping it.
- Why Do the Clocks Go Back in October? The Real ReasonThe clocks go back in autumn to return the UK to GMT, so winter mornings are lighter. The history, the rule, what time it happens and what changes for you.
- When Do the Clocks Go Forward Again After Going Back?When the UK clocks go forward again after the autumn change, how long the UK stays on GMT, when evenings get lighter and how to remember to reset your clocks.
Frequently asked questions
What time zone is Merthyr Tydfil in?
Merthyr Tydfil is in the UK time zone. It uses Greenwich Mean Time (GMT, UTC+0) in winter and British Summer Time (BST, UTC+1) in summer, the same as the rest of the UK.
When do the clocks change in Merthyr Tydfil?
The clocks go forward at 01:00 on the last Sunday of March and back at 02:00 on the last Sunday of October. In 2026 that is Sunday, 29 March 2026 and Sunday, 25 October 2026.
How much daylight does Merthyr Tydfil get in summer and winter?
Around 16h 41m at the June solstice and 7h 47m at the December solstice, based on its latitude of 51.7 degrees north.
Is Merthyr Tydfil on the same time as London?
Yes. All UK clocks show the same time. Because Merthyr Tydfil is 3.4 degrees west of Greenwich, solar noon here is about 14 minutes after clock noon (GMT), but the clocks do not differ.
Why is Merthyr Tydfil famous?
It was the centre of the Welsh iron industry and the site of the first railway journey by steam locomotive in 1804.
How far is Merthyr Tydfil from Cardiff?
About 25 miles. Trains take around 50 minutes.