Thurman, 47, starred in "Pulp Fiction" (1994) and the "Kill Bill" films (2003-04), both directed by Quentin Tarantino and distributed by Weinstein's Miramax Films. She joins scores of women accusing the producer of sexually harassment or assault since an initial Times story in October.
After the success of "Pulp Fiction," Thurman said she became well-acquainted with Weinstein, who spent "hours talking to me about material and complimenting my mind and validating me. It possibly made me overlook warning signs."
Weinstein first tried to lure Thurman into the steam room of a Paris hotel suite, before an "attack" in London's Savoy Hotel.
"He pushed me down," Thurman said. "He tried to shove himself on me. He tried to expose himself. He did all kinds of unpleasant things. But he didn't actually put his back into it and force me."
The Times reported that Weinstein, who is in seclusion undergoing therapy, confirmed through a spokesperson "making a pass" at Thurman after "misreading her signals."
Thurman said she regretted that Weinstein was able to continue his behaviour for decades.
"The complicated feeling I have about Harvey is how bad I feel about all the women that were attacked after I was," she told the Times.
The Weinstein accusations sparked the #MeToo movement, in which people across the entertainment industry and other sectors have voiced allegations of sexual harassment, coercion and assault.