| Cover | Jan. 30, 2023 |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jan. 30, 2023 |
| Entity File Number | 001-40975 |
| Entity Registrant Name | SEAPORT CALIBRE MATERIALS ACQUISITION CORP. |
| Entity Central Index Key | 0001863428 |
| Entity Tax Identification Number | 86-3426874 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 360 Madison Avenue, 20TH Floor |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10017 |
| City Area Code | 212 |
| Local Phone Number | 616-7700 |
| Written Communications | false |
| Soliciting Material | true |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
| Units, each consisting of one share of Class A Common Stock, $0.0001 par value, and one-half of one redeemable Warrant [Member] | |
| Title of 12(b) Security | Units, each consisting of one share of Class A Common Stock, $0.0001 par value, and one-half of one redeemable Warrant |
| Trading Symbol | SCMAC |
| Security Exchange Name | NASDAQ |
| Common Class A [Member] | |
| Title of 12(b) Security | Shares of Class A common stock, included as part of the units |
| Trading Symbol | SCMA |
| Security Exchange Name | NASDAQ |
| Warrant [Member] | |
| Title of 12(b) Security | Warrants, each whole warrant exercisable for one share of Class A Common Stock at an exercise price of $11.50 |
| Trading Symbol | SCMAW |
| Security Exchange Name | NASDAQ |
