In my opinion, you don't need to be experienced per se but you should ok with an adventurous experience. The guides are great and can accommodate a lot of levels but depending on weather it can be exciting.
I went with my fiance on a guided group a few weeks ago, and it was great. There were several other people that didn't have much experience, and the guides were able to help them successfully through the surf and over to the cove. I'd definitely recommend a guided tour if you have minimal experience.
The waves are pretty serious and there is a lot of rocks, so I would say you have to be very experienced.
I would say experience is necessary to kayak here. For us, it was not a enjoyable as we were tired most of the time controlling our kayak.
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