You can say: Olá, sejam bem-vindos, or Muito bem-vindos, or simply Bem vindos!
Olá, bem vindos!
to say you're welcome you would say 'de nada'
In Portuguese, you can say "de nada" or "por nada" to mean "you are welcome."
In Brazilian Portuguese, "welcome" is said as "bem-vindo" if addressing a male, and "bem-vinda" if addressing a female.
"Welcome to California" in Portuguese is "Bem-vindo à Califórnia".
Bem-vinda, to a female; bem-vindas, to a group of females; bem-vindo, to a male; and bem-vindos, to a group of males, or to a mixed group of females and males.
You can say "Bem-vindo às Filipinas".
In Brazilian Portuguese, "welcome" is commonly translated as "bem-vindo" for a male or "bem-vinda" for a female.
Bem-vindo a Lisboa
"Bem-vindos" is a Portuguese phrase meaning "welcome" in English.
Olá, seja bem-vindo !
Bem-vindo ao casamento!