Cardiff Weather Forecast

Cardiff weather including a 5 day forecast for temperature, wind speed, UV and weather warnings for today's weather. Alternatively mapped forecasts are available for temperature, rainfall, pressure and cloud.


Cardiff is the capital and largest city of Wales. It is situated on the northern side of the Bristol Channel.

The area has an abundance of archaeological history and is known to have been subject to human settlement for at least 6,000 years.

Before the Roman conquest of the British mainland, the area was under the control of the Celtic tribe of the Silures. The Romans established a Fort near the mouth of the River Taff in about AD 75 and the name Caerdyf probably had its origins from the name of that settlement, which was built on top of a pre existing Silures town.

The centre of Cardiff is relatively flat and is, to a large extent, built on reclaimed marshland. The city is bounded by hills to the east and west with the land to the north rising to the Brecon Beacons National Park.

The Rivers Taff and Ely, flow through the city to Cardiff Bay, while the River Rhymney flows to the east of the city, directly into the Severn Estuary, which has one of the highest tidal ranges in the world at about 15m (49 ft).

For boats and ships under sail this was a dangerous stretch of coast with reefs, sandbanks and serrated cliffs claiming many wrecks from the traffic using the port of Cardiff which was at one time the world's largest coal port and for a time a main connection for the South Wales steel industry.

The climate in Cardiff is heavily influenced by the Atlantic Ocean and Gulf Stream and the rising landscape of the Welsh mountains lying to the north of the city, which usually generates mild, often cloudy, wet and windy local environment.

Historically there was a major flood in January 1607 that affected both sides of the Bristol Channel and killed thousands of people. There are commemorative plaques on churches to show just how high the waters rose. The cause is uncertain but it could have been a combination of tidal peaks and meteorological extremes, such as those experienced on the east coast of England and Scotland in 1953 and December 2013.

Change location

To change from Cardiff weather forecast, enter a location (this could be a village, town or city) or a postcode into the "Find a weather forecast" box and select the appropriate location from the list provided. You can also search for world forecast locations by entering a location or world post/zip code. To save a location as one of your favourites click on the star next to the location name. You can save up to five locations as favourites. Favourite locations can be found in the drop down list under the "Find a weather forecast" box.

For web browsers that have geolocation capabilities, you can also use the 'find my location' button to automatically find your location. Find out more in the UK forecast guide.

You can move between the weather forecast, nearest observation site and climate for the location by clicking on the arrow next to the forecast location name and selecting either forecast, observations or climate.

Map view

The map view allows you to view both location and mapped forecasts for the UK.

To display your chosen forecast, select one of the options from the map menu on the right. A key to the forecast layer is provided below the timeline.

You can pan and zoom around the map using the controls in the top left of the map or by using your mouse to click and drag the map and the mouse wheel to zoom in and out. Zooming in on a location will display additional location forecasts in that area.

Click on the time selector to view the forecast for a particular time or use the play button to animate the forecast.

Five day table

The five day forecast table provides a detailed view of the weather for the days ahead at Cardiff.

Our Air Quality Index is currently in Beta. It is a daily index representing the background and regional air quality for a chosen location. Air pollution levels close to roads in urban areas may be higher. For more information please visit our Daily Air Quality Index page.


The Timeline provides an alternative graphical representation of the five day forecast for a location. Forecasts for around 5000 UK locations can be viewed in this way. For each location we provide three-hourly forecasts of weather, temperature, wind speed and direction and feels like temperature.

Temperature range

The temperature range forecast is a relatively new way of displaying forecast information. Temperatures will fall within the indicated range roughly 9 times out of 10 with the most likely temperature shown in green. There may be variations between this product and the five day forecast. Five day forecasts of maximum and minimum temperature for around 5000 UK locations can be viewed in this way.

Text forecast

Text forecasts are provided for the each of the nations of England, Scotland, Wales and Northern Ireland along with six regional forecasts for Scotland and eight regions of England.