Meteorologists are scientists who study the weather and atmosphere in order to predict the weather in the immediate and longer-term future. They analyse regional and global weather and climate trends, often from an environmental perspective.

A meteorologist's work falls into the two main categories of forecasting and research. Meteorologists study the causes of particular weather conditions using information obtained from the land, sea and upper atmosphere. They use computerised and mathematical models to make short and long-range forecasts concerning weather and climate patterns.

A wide variety of organisations use meteorological forecasts including transport services (particularly air and sea travel), the shipping and sea fishing industries and sailing organisations, the armed forces, government services, e.g. for advice on climate change policy, farmers, public services, the media, industry and retail businesses, insurance companies and health services. In addition to forecasting, meteorologists study the impact of weather on the environment and conduct research into weather patterns, climate change and models of weather prediction.