Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2015	Nov. 13, 2015
Document And Entity Information [Abstract]
Entity Registrant Name	WELLS FINANCIAL CORP
Entity Central Index Key	0000934739
Trading Symbol	wefp
Current Fiscal Year End Date	--12-31
Entity Filer Category	Smaller Reporting Company
Entity Common Stock, Shares Outstanding		805,710
Document Type	10-Q
Document Period End Date	Sep. 30, 2015
Amendment Flag	false
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q3