Tourist thread 2021 - ask anything about visiting Croatia

I think you should double check and I think certificate is enough. From offical page https://www.koronavirus.hr/recommendations-and-instructions-for-crossing-the-state-border/736

Third-country nationals who are not family members of citizens of Schengen Member States and Schengen Associated States ...

  1. persons who travel for tourist reasons and have a certificate of paid accommodation in a hotel, camp, private renter or rented vessel and other form of tourist accommodation or are owners of houses or vessels in the Republic of Croatia - entry into the Republic of Croatia will be allowed upon presentation of one of the following documents:

...

certificate that they have received two doses of vaccine used in the EU Member States not older than 270 days, provided that 14 days have passed since they received the second dose, or a certificate that they have received one dose of the vaccine, not older than 270 days, if the vaccine is administered in a single dose (Janssen/Johnson&Johnson), provided that 14 days have passed since they received the single dose

...

/r/croatia Thread Parent