A scan then will determine whether the utility will return from his back injury, or be sidelined until next season.
Weddle had played 57 consecutive games since his senior debut and was among the Hawks' best players this year when the 21-year-old young gun was sidelined with a back injury after the round-17 win over North Melbourne.
There were initial fears that his season was over, but Hawthorn are growing optimistic he is on the verge of a return that would be a significant boost to their September campaign.
"He's excited and optimistic. Out of that scan on Monday will come one of two things," Hawks coach Sam Mitchell said on Friday.
"One if his back hasn't quite handled the training loads we've put in front of him, in which case he'll be ruled out.
"But more optimistically, if he has handled it, he'll be a chance to play some footy in the week or two after that."
Weddle will learn his finals fate a day after Hawthorn learn where they will finish in the top eight.
Their massive Gabba clash on Sunday night against the Brisbane Lions, the reigning premiers, is one of the key round-24 games for shaping the finals matchups.
"We feel like we've been playing finals types of games for a long period now, so we've put ourselves in a good position," Mitchell said.
"I sound very boring and very coach-like, but control the controllables.
Mitchell is unconcerned that Hawthorn have not played at the Gabba since 2019.
"We think we can play some good footy there," he said.
It comes after the Hawks were in front at the last change in big away games over the last few weeks against Fremantle and Adelaide, only to lose.
"Leading at three-quarter time is not what we're about, is it?," he said.
Also on Friday, the Hawks announced veteran forward Jack Gunston will play on next season.
He has kicked 60 goals this season, a career-best haul, and is coming off a bag of seven last week against Melbourne.
The 33-year-old, a three-time Hawthorn premiership player, looks set for his second All-Australian selection and his on-field form has been a welcome surprise this year for the Hawks.
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