CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 10,715	$ 16,714	$ (3,272)	$ 4,235
Other comprehensive income (loss):
Foreign currency translation adjustment	(47)	6	(48)	1
Change in fair value of interest rate swaps, net of reclassification adjustment	(2,003)	0	1,510	0
Income tax benefit associated with other comprehensive income items	496	0	252	0
Comprehensive income (loss)	9,161	16,720	(1,558)	4,236
Net (income) attributable to non-controlling interests	0	0	0	(119)
Net (income) loss attributable to non-controlling interests of One Water Marine Holdings, LLC	0	(2,031)	1,648	(572)
Foreign currency translation adjustment attributable to non-controlling interest of One Water Marine Holdings, LLC	0	(1)	(2)	0
Change in fair value of interest rate swaps, net of reclassification adjustment attributable to non-controlling interest of One Water Marine Holdings, LLC	0	0	(574)	0
Income tax expense associated with other comprehensive income items attributable to non-controlling interest of One Water Marine Holdings, LLC	0	0	87	0
Comprehensive income (loss) attributable to OneWater Marine Inc.	$ 9,161	$ 14,688	$ (399)	$ 3,545