"I'm taking this opportunity to thank Minister Dendias for the generous and prompt humanitarian aid that Greece sent to earthquake-hit areas in Croatia," Grlić Radman said in Athens, where he arrived for an official visit a day after visiting Cyprus.
"Greece itself was recently hit by strong earthquakes and I'm conveying our support and willingness to help," he added.
Greece was struck by two tremors earlier this month, the strongest measuring 6.3 on the Richter scale, which caused material damage but no fatalities.
Support for Croatia's membership bids
Grlić Radman also thanked Dendias for the Greek support for Croatia's accession to MED7, a group which comprises seven Mediterranean EU member states - Cyprus, France, Greece, Italy, Malta, Portugal and Spain.
He also thanked Dendias for supporting Croatia's accession to the Organisation for Economic Co-operation and Development and the euro and Schengen areas.
The two ministers underlined the importance of continuing EU enlargement to Southeast Europe and of Brussels having a consistent policy so that candidates do not lose the European perspective.
Grlić Radman cited Bosnia and Herzegovina, which is having a hard time managing the migrant crisis, and underlined solidarity with Greece, which is also on the front line of that "big political, security and economic problem."
The minister said they were pleased with the increase in Croatian-Greek trade, singling out the Greek company Avax, which is building access roads to the Pelješac Bridge in Croatia.