The 2025 Big West Conference baseball tournament will determine the conference champion for the Big West Conference at the end of the 2025 season. The top five teams will meet at Cal State Fullerton's on campus venue, Goodwin Field from May 21 through 24. This will be the first Big West Conference postseason championship event since the 1998 season, ending a 27-year hiatus. 
Seeding and format.
The top five finishers from the regular season will be seeded one through five based on conference winning percentage. Seeds No. 1, No. 2, and No. 3 will receive a bye into the double elimination bracket, while No. 4 and No. 5 will battle in a single elimination the first round. Cal Poly, the winner, will receive the Big West's automatic berth to the 2025 postseason.
All-Tournament Team.
The following players were members of the Big West Conference All-Tournament Team.