On 9 June, "Beaver" and four of her S-boats sailed north for a cruise in Alaskan waters. This was the first visit by American submarines to this region, and the squadron spent nearly three months surveying the straits and coastal islands for a possible submarine base. In mid-August, after a stop at Vancouver, British Columbia, the squadron visited Astoria, Oregon, to look over a site contemplated for another submarine base. Finally, "Beaver" and her charges returned to San Pedro on 25 August. The tender supported local submarine operations off California for the remainder of the year.