2 Weeks in Thailand in June - Where to go?

I’m planning a 2-week trip to Thailand in early June and would love some advice!

I’ve already been to the Gulf islands (Koh Samui, Koh Phangan, and Koh Tao), so I’d prefer to explore different parts of the country this time around.

Ideally, I’m looking for:

-A mix of culture + relaxation

-Somewhere scenic/nature-focused

-Beautiful beach

-Options that aren’t too heavily impacted by rain (if possible in June)

Where would you recommend for a 2-week itinerary?

Is Koh Kood worth the trip in June, or should I consider somewhere else?

I appreciate any suggestions on great spots—thanks in advance!