After securing the signing of young striker Adan George on-loan from Birmingham, Scrimshaw now comes in on a short-term deal after Josh Gordon was sidelined until at least December through injury.
The 20-year-old had a loan spell at National League side Eastleigh towards the back end of last season. He also had a successful loan stint at Poole Town in the 2018/19 campaign where he scored 17 goals to help them reach the Southern League South play-offs.
The striker was also named Bournemouth’s Under-18s Player of the Year for the 2018-19 season after his goals helped the Cherries reach the FA Youth Cup quarter-finals for the first time in their history.
“I’m really excited to be joining Walsall,” Scrimshaw said.
“I know the club want to be playing the right football in order to get back up to the leagues they belong in.
“I want to play and contribute as many goals as physically possible I’m desperate to play as many games as possible but looking forward to competing in the first team environment there.
“In terms of what type of player I am, Danny Ings would be the best example as we’re obviously from the same academy, same size and both scored a lot of goals through the youth set up.
“I love to score goals but am always extremely hard working any time I am playing – work ethic is big for me."
Saddlers manager Darrell Clarke added: “We’re really please to bring Jake in.
“He’s scored plenty of goals in non-league and is relishing the opportunity to show what he can do at league level.
“We’re thankful to Bournemouth for allowing him to come to us on loan without us having to contribute towards his wages during these difficult times.”