February Honeymoon Cali/hawaii suggestions?

Assuming you're flying through LAX on your way home from Maui, I'd probably choose Santa Barbara. We lived there for several years. It's beautiful, with lots to do, including wineries in the Santa Ynez area (north of SB), a variety of beaches (although, it likely won't be super warm in February), great restaurants/B&B's/resorts/etc. The botanical gardens are beautiful and provide some opportunities for light hiking. If you're really into hard core hiking, there are many options in the foothills northeast of the city. As you know, San Diego offers many similar options, but it is a bigger city than SB, so there are a lot more attractions/things to do (e.g., Balboa Park, tons of museums, the Zoo, Safari Park, touring the USS Midway, tons of restaurants & bars, Sea World, Mission Bay water park options, wineries to the east, etc.). Either is a great option if you don't want to spend much time/energy on additional flights/travel.

I love the pp suggestions of santa Barbara !

Oahu will be amazing! We went for our honeymoon in July. As far as CA goes, I'm biased to San Diego since I grew up there but if you've already been there, you could look into San Francisco or Napa? Or maybe LA?