I agree with CD. Flat tides are not good. You need enough of an exchange and current to push around the bait, like herring, which gets concentrated around points and along dropoffs, where the salmon wait to waylay them. Salmon do not hunker down on these fast currents -- I've seen hot king bites at Sekiu during current of 1.5 knots or more. You just have to know how to maneuver your boat (backmotoring and such) and what weight to use to keep your bait down. In short daylight hours of winter, the best tide is a moderate to swift morning ebb. The fish are hungry in the morning, and the ebb is usually stronger than the flood and sets the food chain in motion.