Best travel destinations in July for natural beauty?

My wife and I (26M and 26F) are planning a trip towards the end of July. We have narrowed it down to a few places:

- Canary Islands

- Sardinia

- Sicily

- Greek Islands

- Southern California

What we really value is natural beauty and the beach. So we love beautiful landscapes, being by the water, swimming, hiking, etc. We don’t care about nightlife since we don’t drink.

Would love to hear recommendations on the best places that would meet this criteria!