Vaisala can refer to:

Last name

• Vilho Väisälä (1899–1969), Finnish meteorologist and businessman
• Yrjö Väisälä (1891–1971), Finnish astronomer and physicist

Other

• 139P/Väisälä–Oterma, a periodic comet discovered by Yrjö Väisälä and Liisi Oterma
• 1573 Väisälä, a minor planet named for Yrjö Väisälä
• Brunt–Väisälä frequency, the angular frequency at which a vertically displaced parcel will oscillate within a statically stable environment
• Schmidt-Väisälä camera, a type of telescope
• Vaisala (crater), a lunar crater named for Yrjö Väisälä
• Vaisala, Samoa, a village in Samoa
• Vaisala, a Finnish company founded by Vilho Väisälä

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