Here you are folks from the WDFW website and this means 3 two day fishing weeks. Then Nov but one never knows about that with flows and weather.

Chehalis River and Grays Harbor Areas 2A-1, 2A, AND 2D
2021 Fall Fishery - Tentative and subject to updates Maximum mesh size is 6 1/2 inches

All Green Sturgeon must be released immediately when encountered.
The Chehalis River downstream of the power line crossing below the confluence of the Wynoochee River, and Grays Harbor Areas 2A-1, 2A, and 2D will be open for commercial gillnet fishing for authorized Quinault Tribal Fishers. The fishery will begin at Noon on the set in day and will end at Noon on the pull out day of each week. The opening and closing dates are as follows:

Stat Week Set In Pull Out
40 Sun. Sept. 26 Tues. Sept. 28
41 Sun. Oct. 3 Tues. Oct. 5
42 Sun. Oct. 10 Tues. Oct. 12
43 Closed Closed
44 Closed Closed
45 Sun. Oct. 31 Thur. Nov. 4
46 Sun. Nov. 7 Wed. Nov. 10
47 Sun. Nov. 14 Wed. Nov. 17