Our sailing (Hawaii to Vancouver 2022) was in May, so weather may vary somewhat. It was warm in Hawaii, but not crazy hot like Texas. Though, we did excursions to higher elevations, particularly Haleakala, and definitely needed jackets up there (temps in the 50s compared with about 78 at sea level). The first couple of sea days leaving Hawaii were warm and sunny, then the weather changed to cool and rainy for the next few days as we were getting to Vancouver. We had nice weather in Vancouver. I would think that in October (guessing that is your sailing), it'll be nice and autumn-like in Vancouver.
So basically, bring all the things. A little of each. (we also sailed on to Alaska, so the jackets came back out for part of that)