CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Revenues:
Total revenues	$ 1,872,334	$ 1,772,630	$ 1,936,310
Cost of sales:
Total cost of sales	1,445,312	1,337,567	1,401,184
Selling, general and administrative expenses	343,285	332,680	345,524
Depreciation and amortization	21,634	19,401	23,898
Transaction costs	1,547	1,530	1,839
Change in fair value of contingent consideration	(2,133)	4,248	(1,604)
Restructuring and impairment	148,139	12,386	147,402
(Loss) income from operations	(85,450)	64,818	18,067
Other expense (income):
Interest expense – floor plan	28,469	34,087	25,080
Interest expense – other	36,183	37,050	34,557
Other expense, net	1,429	14	953
Total other expense, net	66,081	71,151	60,590
Net loss before income tax benefit	(151,531)	(6,333)	(42,523)
Income tax benefit	(35,301)	(157)	(3,412)
Net loss	(116,230)	(6,176)	(39,111)
Net income attributable to non-controlling interests	0	(119)	(3,810)
Net loss attributable to non-controlling interests of One Water Marine Holdings, LLC	1,648	590	4,329
Net loss attributable to OneWater Marine Inc.	(114,582)	(5,705)	(38,592)
New boat
Revenues:
Total revenues	1,158,165	1,118,292	1,223,691
Cost of sales:
Total cost of sales	974,951	921,406	955,222
Pre-owned boat
Revenues:
Total revenues	363,906	312,193	334,477
Cost of sales:
Total cost of sales	298,361	248,068	258,524
Finance & insurance income
Revenues:
Total revenues	54,959	51,494	56,325
Service, parts & other
Revenues:
Total revenues	295,304	290,651	321,817
Cost of sales:
Total cost of sales	$ 172,000	$ 168,093	$ 187,438
Class A Common Stock
Other expense (income):
Net loss per share of Class A common stock – basic (in dollars per share)	$ (7.22)	$ (0.39)	$ (2.69)
Net loss per share of Class A common stock – diluted (in dollars per share)	$ (7.22)	$ (0.39)	$ (2.69)
Basic weighted-average shares of Class A common stock outstanding (in shares)	15,869	14,585	14,328
Diluted weighted-average shares of Class A common stock outstanding (in shares)	15,869	14,585	14,328