Vaisala (Finnish pronunciation: [ˈʋæi̯sælæ]) is a Finnish company that develops, manufactures and markets products and services for environmental and industrial measurement.

The major customer groups and markets are national meteorological and hydrological services, aviation authorities, defense forces, road authorities, the weather critical energy sector, life science and high-technology industries and building automation.

Vaisala had 1,529 employees and net sales of €319.1 million in 2015. Vaisala serves customers in more than 140 countries.

The parent company Vaisala Oyj, domicile in Vantaa, Finland, is listed on the NASDAQ OMX Helsinki. Vaisala Group has offices and operations in Finland, the United States, the United Kingdom, Canada, France, Germany, China, India, Sweden, Malaysia, South Korea, Brazil, United Arab Emirates, Japan and Australia.