Somerset are looking to claim their second One-Day Cup title and repeat their exploits from 2019 when they beat Hampshire.
Tweddle, who has taken interim charge of the One-Day Cup side for the third time this summer, said his squad has benefited from consistency and experience even though many players are relatively young in their careers.
“There’s some really important experience that’s been added, it’s been amazing to be able to have people like Jack Leach available for the whole competition,” he said.
“Previous years we’ve had some injuries which going into the competition haven’t been ideal, but the mainstay of the squad this year has been really experienced.
“Even within the competition itself they’ve played 50-over cricket for three or four years together as a group and they’ve really grown together.”