The LA Galaxy striker has been linked with a temporary return to England during the MLS off-season, with both Harry Redknapp and Paul Lambert reportedly keen on luring the Republic of Ireland international back to the Premier League.
But the 32-year-old forward does not expect to seal a return to the English top flight this month, saying that the “time is not right”.
“It’s been a long season, with the Euros and what have you,” said Keane, who spent a loan spell at Aston Villa last January.
“I’ve a few little niggles that need to be sorted out so I don’t think at this moment in time it would be right for me to go anywhere.
“I had another year left and they offered me a new contract at the end of last season. I’ve just signed a new two-year contract.”
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