Things to do in Cardiff in September

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Overview

September is a great time to visit Cardiff. The weather is usually mildly cool and breezy, with temperatures ranging from 52—64°F (11—18°C). There are plenty of events to check out and activities to try in Cardiff during this time. Some of our top recommendations: go for a hike in the Brecon Beacons National Park, visit St Fagans National Museum of History, take a guided tour of Cardiff Castle, and more!

Cardiff has plenty to offer for visitors of all ages and interests. In this article, we tell you the top things to see and do for your September trip to Cardiff. Get inspired by the events, activities, attractions, and experiences unique to September. We’ll let you know where to explore events based on your interests, whether that’s food, culture, art, music, sport or others.

We’ll let you know everything you need to prepare for the weather in Cardiff in September. Learn about what to wear and pack for your trip, the average temperatures throughout September, temperature changes from morning to evening and much more.

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Don't take our word for it
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Best events and things to do in Cardiff in September

Top experiences in September
Go for a hike in the Brecon Beacons National Park
September is a great time to explore the stunning natural beauty of the Brecon Beacons, as the weather is still mild and the summer crowds have started to dissipate. You can take a leisurely stroll along one of the park's many walking trails, or challenge yourself with a more strenuous hike to one of the area's peaks.
Visit St Fagans National Museum of History
September is a great time to visit this open-air museum, which showcases the history and culture of Wales through its collection of historic buildings, gardens, and exhibitions. You can learn about traditional Welsh crafts, explore a recreated Celtic village, and even watch live demonstrations of traditional skills.
Take a guided tour of Cardiff Castle
September is a great time to visit Cardiff Castle, as the summer tourist season has come to an end and the castle grounds are less crowded. A guided tour will give you a fascinating insight into the history of the castle, from its origins as a Roman fort to its transformation into a Victorian Gothic fantasy.
Take a day trip to the Gower Peninsula
September is a great time to explore the stunning coastline and picturesque villages of the Gower Peninsula, as the summer crowds have started to dwindle. You can relax on one of the area's beautiful beaches, take a scenic coastal walk, or visit one of the charming seaside towns.
Explore Cardiff Bay by boat
September is a great time to take a boat tour of Cardiff Bay, as the weather is still pleasant and the summer crowds have started to thin out. You can enjoy stunning views of the waterfront, learn about the history of the area, and even spot some wildlife along the way.
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Holidays in Cardiff in September
September

There are no holidays in Cardiff in September

Other notable holidays
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Weather in Cardiff in September

Temperatures on an average day in Cardiff in September

The average temperature in Cardiff in September for a typical day ranges from a high of 64°F (18°C) to a low of 52°F (11°C). Some would describe it as mildly cool and breezy.

For comparison, the hottest month in Cardiff, July, has days with highs of 68°F (20°C) and lows of 55°F (13°C). The coldest month, February has days with highs of 45°F (7°C) and lows of 37°F (3°C). This graph shows how an average day looks like in Cardiff in September based on historical data.

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Historical temperature average in September
64°F
highs
52°F
lows

General weather summary

Mildly cool and breezy
Feels like
29%
Chance of rain
0.094 in
Amount
16.1 mph
Wind speed
82%
Humidity
12.7 hrs
Daylight length
6:45 AM
Sunrise
7:28 PM
Sunset
46%
Cloud cover
Sweater
What to wear
What to wear in September
With an average high of 64°F (18°C) and a low of 52°F (11°C), it generally feels mildly cool and breezy. There might also be a small chance of rain. With that in mind, most people would dress in something moderately warm like a sweater
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Best attractions for Cardiff in September

Besides the array of exciting events and activities Cardiff has to offer for travelers in September, we want to remind you of the classic attractions in Cardiff that are great to visit at this time of the year as well! You can’t miss these iconic landmarks, local favorites, and places rich with cultural heritage. We hope to give you insights and inspiration into the best things to see and do to make the most of your visit. Here is a list of our top attractions in Cardiff for September.
St. Fagans National Museum of History
1. St. Fagans National Museum of History
4.7
(10795)
History museum
Museums
Open-air history of Welsh life with ancient buildings re-erected and traditional crafters at work.
Cardiff Castle
2. Cardiff Castle
4.6
(19157)
Castle
Sights & Landmarks
Victorian Gothic fantasy built on the remains of Norman & Roman ruins, with a colourful interior.
Cardiff Bay
3. Cardiff Bay
4.7
(1388)
Bay
Sights & Landmarks
Celebrated urban area featuring a marina, shops & eateries, plus historic buildings & guided tours.
Principality Stadium
4. Principality Stadium
4.7
(13904)
Stadium
Sights & Landmarks
Riverside home of Welsh rugby union, plus football, speedway & concerts, with daily tours.
Wales Millennium Centre
5. Wales Millennium Centre
4.7
(6744)
Event venue
Concerts & Shows
Major modern culture venue staging theatre, opera, ballet and music shows, with bars and dining.
National Museum Cardiff
6. National Museum Cardiff
4.6
(8838)
National museum
Museums
Archaeological artefacts, art & natural history, plus visiting exhibitions in a grand setting.
Bute Park
7. Bute Park
4.7
(6463)
City park
Nature & Parks
A rambling riverside beauty spot with an arboretum, Victorian gardens, friary ruins and a cafe.
Castell Coch
8. Castell Coch
4.6
(3764)
Castle
Sights & Landmarks
Audio tours of a grand 19th-century castle built in the gothic-revival style & surrounded by woods.
Techniquest
9. Techniquest
4.5
(1328)
Science museum
Museums
Family-friendly attraction that aims to teach people about science and motivate them to learn more.
Roath Park
10. Roath Park
4.7
(5639)
City park
Nature & Parks
Massive Victorian park with lake, botanic garden, adventure playground, cafe and sports facilities.
Utilita Arena Cardiff
11. Utilita Arena Cardiff
4.4
(8772)
Event venue
Sights & Landmarks
Multi-purpose venue for live music and comedy, sports events, banquets, conferences and exhibitions.
Mermaid Quay
12. Mermaid Quay
Building
Sights & Landmarks
Popular gathering place on the water offering an array of restaurants, bars, shops & events.
Cardiff Bay Barrage
13. Cardiff Bay Barrage
4.7
(294)
Port authority
Nature & Parks
Modern harbor barrier, featuring locks & an embankment with bike paths, a playground & picnic areas.
Llandaff Cathedral
14. Llandaff Cathedral
4.7
(728)
Cathedral
Sights & Landmarks
Medieval place of worship with a 10th-century Celtic cross and a triptych painted by D.G. Rossetti.
New Theatre
15. New Theatre
4.6
(3164)
Performing arts theater
Concerts & Shows
Victorian variety theatre featuring top names in short-run drama, musical, plays and shows.
Senedd
16. Senedd
4.4
(46)
Government office
Sights & Landmarks

Looking for day-by-day itineraries in Cardiff?

Get inspired for your trip to Cardiff with our curated itineraries that are jam-packed with popular attractions everyday! Check them out here:

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