Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2016	Aug. 08, 2016
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q2
Trading Symbol	ck0001585389
Entity Registrant Name	STRATEGIC STORAGE TRUST II, INC.
Entity Central Index Key	0001585389
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Class A Common stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		40,163,180
Class T Common stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		3,935,190