They're not that rough in November, but keep in mind that it's the start of the rainy season, and particularly on the North Shore, it may not be all that sunny. It also may be sunny, but you really can't predict how it will go in any given year.

I know that it could get a bit chilly at night starting in Nov. Still, I always go at the beginning of the month. Sometimes you can't tell it's the start of their "winter" (and I use that term loosely) and sometimes you can.

No matter, it's still Kauai and better than just about anywhere else.