Sky Sports says Watmore has a group of clubs interested in him with his short-term Middlesbrough deal up in two weeks.
Middlesbrough have offered the forward a longer-term contract and manager Neil Warnock has said he'd be “stupid" to leave his in-form side having just returned from two serious knee injuries while at Sunderland.
The forward has scored four times in seven appearances since signing the six-week deal last month. Watmore was originally offered training facilities by Warnock, but impressed the 72-year-old.
Watmore would prefer to stay at 'Boro and has enjoyed working with Warnock, but other clubs have made the situation less straight-forward.