Our Mission and Purpose
Cardiff Weather was created to provide accurate, accessible weather information for Wales's capital city to a global audience. We recognized that people searching for Cardiff weather information need reliable data whether they're planning a visit, considering relocation, or simply curious about Welsh climate patterns. Our goal is to present meteorological data in clear, understandable terms without sacrificing accuracy or detail.
The website serves multiple audiences: tourists planning trips to Cardiff who need to know what clothing to pack and which seasons offer optimal conditions; potential residents researching what living in Cardiff's climate entails; researchers and students seeking historical climate data; and weather enthusiasts interested in maritime climate patterns. We've structured our content to address these diverse needs while maintaining scientific accuracy.
Unlike generic weather sites that provide only current forecasts, we focus on climate patterns, historical trends, and contextual information that helps users understand Cardiff's weather in depth. Our comprehensive approach includes seasonal breakdowns, comparisons with other cities, and detailed explanations of the meteorological factors that shape Cardiff's climate. This educational focus distinguishes us from simple forecast services.
Cardiff Weather Information Categories
| Category |
Coverage |
Update Frequency |
Data Period |
| Current Conditions |
Temperature, precipitation, wind |
Real-time (via external links) |
Live data |
| Climate Averages |
Monthly temperature and rainfall |
Annual review |
1991-2020 normals |
| Seasonal Patterns |
Detailed seasonal analysis |
Quarterly updates |
Historical records |
| Comparative Data |
UK and international comparisons |
Annual review |
Multi-decade data |
Data Sources and Methodology
Our weather information draws primarily from the UK Met Office, Britain's national weather service and one of the world's most respected meteorological organizations. The Met Office maintains comprehensive weather stations throughout Wales, including a primary station at Cardiff Airport that has collected continuous data for decades. We utilize their published climate normals, which represent 30-year averages calculated from 1991-2020 data, following World Meteorological Organization standards.
Historical weather records come from multiple authoritative sources. The Met Office's digital archive provides temperature, precipitation, and wind data extending back to the establishment of systematic weather recording in Cardiff. We also reference academic climatology studies published by UK universities and research institutions. When presenting extreme weather events or record temperatures, we verify information across multiple sources to ensure accuracy. Our FAQ section incorporates practical observations alongside statistical data to provide both scientific accuracy and real-world relevance.
We calculate averages, ranges, and trends using standard meteorological methods. Temperature data represents mean daily values unless otherwise specified. Rainfall totals include all forms of precipitation (rain, snow, sleet). Wind speeds reference sustained speeds rather than gusts unless explicitly noted. When comparing Cardiff to other cities, we use equivalent data periods and measurement standards to ensure valid comparisons. All measurements are presented in both metric and imperial units to serve our international audience, with conversions verified for accuracy.
Understanding Cardiff's Unique Climate Position
Cardiff's position on the Bristol Channel creates distinctive weather patterns that merit explanation. The city sits at approximately 51.5°N latitude, similar to London, Calgary, and Prague, but its weather differs significantly from these cities due to maritime influences. The Gulf Stream and North Atlantic Drift bring warm ocean currents near the British Isles, moderating temperatures and preventing the extreme cold that affects continental locations at similar latitudes.
The Bristol Channel itself plays a crucial role in Cardiff's climate. This funnel-shaped waterway connects to the Atlantic Ocean and experiences some of the world's highest tidal ranges, reaching 14 meters during spring tides. The channel's orientation and shape influence wind patterns, often intensifying southwesterly winds that bring Atlantic weather systems directly to Cardiff. The surrounding topography, including the Brecon Beacons to the north and the Vale of Glamorgan to the west, also affects local weather by channeling winds and influencing precipitation patterns.
For those interested in learning more about specific weather patterns, our main page provides detailed seasonal breakdowns and monthly climate data. Our FAQ page addresses common questions about rainfall, temperature ranges, and optimal visiting times. We regularly update our content to reflect current climate research while maintaining focus on the long-term patterns that define Cardiff's weather character. Understanding these geographical and meteorological factors helps explain why Cardiff experiences its characteristic mild, wet, and windy conditions throughout the year.
Geographical Factors Affecting Cardiff Weather
| Factor |
Description |
Primary Effect |
Seasonal Variation |
| Bristol Channel |
Coastal waterway position |
Maritime moderation, increased wind |
Strongest wind effect in winter |
| Atlantic Systems |
Prevailing weather patterns |
Frequent rainfall, mild temperatures |
Most active autumn-winter |
| Gulf Stream |
Warm ocean current |
Temperature moderation |
Year-round warming effect |
| Welsh Topography |
Surrounding hills and valleys |
Local precipitation patterns |
Enhanced rainfall on high ground |