| Document and Entity Information | Oct. 22, 2021 |
| Cover [Abstract] | |
| Entity Registrant Name | WVS FINANCIAL CORP |
| Amendment Flag | false |
| Entity Central Index Key | 0000910679 |
| Document Type | 8-K |
| Document Period End Date | Oct. 22, 2021 |
| Entity Incorporation State Country Code | PA |
| Entity File Number | 0-22444 |
| Entity Tax Identification Number | 25-1710500 |
| Entity Address, Address Line One | 9001 Perry Highway |
| Entity Address, City or Town | Pittsburgh |
| Entity Address, State or Province | PA |
| Entity Address, Postal Zip Code | 15237 |
| City Area Code | (412) |
| Local Phone Number | 364-1911 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock |
| Trading Symbol | WVFC |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
