| Cover | Sep. 30, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Sep. 30, 2021 |
| Entity File Number | 001-40702 |
| Entity Registrant Name | Weber Inc. |
| Entity Central Index Key | 0001857951 |
| Entity Tax Identification Number | 61-1999408 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 1415 S. Roselle Road |
| Entity Address, City or Town | Palatine |
| Entity Address, State or Province | IL |
| Entity Address, Postal Zip Code | 60067 |
| City Area Code | 847 |
| Local Phone Number | 934-5700 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Class A Common Stock, par value $0.001 per share |
| Trading Symbol | WEBR |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
