October’s an iffy month in Oregon. You can have either really decent, mild weather or it can be horrible.
Honestly, forget the salmon, trout, and steelhead. What you want to fish for are bottom fish, if the season’s still open then. Hook into one Ling Cod of decent size and you’ll be hooked for life. Better fight than any other fish I’ve ever hooked. I’m sure you could go out for Chinook(the Coho season’s closed well before Ocotober). I can give you a few different places to try, and I’ve had excellent luck with all of them for Bottom fish, salmon, and in the case of Astoria, Sturgeon:
Prowler Charters, Bandon
Dockside Charters, Deopoe Bay
Tiki Charters, Astoria
There are also a few others in Newport, Garabaldi and Pacific City that are pretty good, too.
I’d stay away from the Reedsport/Coos Bay/North Bend charter fishing fleet. I’m sure they’re very knowledgable, but I also know that they have one of the highest percentages of accidents on the water. A few years ago one of the captains out of Reedsport ignored Coast Guard orders and killed all but one of the fishermen on board his boat. Bad news to say the least, especially with the seas picking up in October.
Also, the rivers are never really all that good, unless you really know where to go, and how to do it. Freshly cured Salmon Roe is a must. A boat also really increases your chances of success. The best seem to be the Coquille and Umpqua, and Nestuca rivers, and they have the best runs of Chinook. The Yaquina gets some nice sea run cutthroats. But, that’s about it.
Honestly, I’d recomend going further south, around Gold Beach. Best shore fishing for Salmon the Pacific Northwest has to offer. The Rogue River gets a large run of salmon, too. Right along the Jetty, fishing with large flashy spoons or even herring. You can see all the people lined up catching salmon.
Good luck to ya. I know I’m going up there again this July, August and September. My favorite place in the world to fish.