Latest weather updates and forecast for Cardiff.
Today, September 18, 2026, Cardiff will experience a cloudy day with a high temperature of 18°C and a low of 16°C. The average temperature for the day is expected to be around 17.0°C. A significant factor for today will be the high humidity, which is predicted to be 88%.
This elevated moisture in the air, combined with the cloudy conditions, means that the weather might feel rather muggy.
Source: Data referenced in this article is taken from https://www.metoffice.gov.uk
the overcast conditions suggest a possibility of light showers or drizzle throughout the day While the chance of precipitation is less than 5%. The maximum wind speed is forecast to be around 51.5 kph, which could bring a noticeable breeze. Following today’s cloudy and humid weather, tomorrow, September 19, is expected to bring light rain. Temperatures will remain mild, with a high of 19°C and a low of 14°C. From September 20 to September 24, the city is forecast to experience sunny intervals. Temperatures are expected to gradually rise, with highs reaching up to 21°C on September 21 and 22. The low temperatures will hover around the mid-teens, generally between 12°C and 14°C.
The day’s weather is characterized by a significant amount of cloud cover, contributing to the elevated humidity levels. The latter half of the week appears to be more settled and sunny. This period of sunny intervals suggests a pleasant shift in weather, making it more conducive for outdoor activities.
The forecast for Cardiff indicates a mixed bag of weather conditions over the next seven days, with a general trend of improving conditions after today.