Cover - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2021	Jan. 19, 2022	Apr. 30, 2020
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Current Fiscal Year End Date	--10-31
Document Period End Date	Oct. 31, 2021
Document Transition Report	false
Entity File Number	000-53588
Entity Registrant Name	HIGHWATER ETHANOL, LLC
Entity Incorporation, State or Country Code	MN
Entity Tax Identification Number	20-4798531
Entity Address, Address Line One	24500 US Highway 14,
Entity Address, City or Town	Lamberton,
Entity Address, State or Province	MN
Entity Address, Postal Zip Code	56152
City Area Code	507
Local Phone Number	752-6160
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	false
Entity Shell Company	false
Entity Public Float			$ 41,220
Entity Common Stock, Shares Outstanding (in shares)		4,770
Documents Incorporated by Reference	The registrant has incorporated by reference into Part III of this Annual Report on Form 10-K portions of its definitive proxy statement to be filed with the Securities and Exchange Commission within 120 days after the close of the fiscal year covered by this Annual Report.
Entity Central Index Key	0001371451
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Amendment Flag	false