Kerber's comments come after she beat Caroline Wozniacki 3-6, 6-1, 7-5 in the final of the Porsche Tennis Grand Prix in Stuttgart.
"A few days ago I said clay is actually not my favorite surface, but right now I think I will change my mind," Kerber said after the match. "I've played very well on clay the last few days and weeks."
Kerber also pointed out that she will be looking to build on her perfect start to the clay-court season before the French Open starts at the end of May.
"I feel good that I have had so many matches on clay, and now I'm looking forward to the next tournaments before Paris," she said. "Of course I'm a little bit tired – I've had a lot of matches the last few weeks, and also a lot of travel. So that's why I'm for sure taking the next few days off, just relaxing a little bit before I go to Madrid."
Meanwhile, Wozniacki admitted that Kerber outplayed her when it mattered the most, but added that she enjoyed playing against her friend in the final.
"It was small things today that made the difference," Wozniacki said. "I had 5-3 in the third set and 30-all, and it could have gone both ways, but she took her chances and it went her way.
"We're great friends, we hang out a lot and practice a lot together, and it's always nice to play a friend in a final. You obviously want to win, but if you don't win, it's still nice that your friend does."