A morning and early afternoon in Miami - Suggestions please

I will be travelling to Miami next week for my cousin’s wedding. Most of the trip is pretty well planned out with lots of fun things to do.

However, I will be arriving before my wife and kids and am looking for something to do.

My flight gets in at 6:30 am on a thursday morning. My wife and 2 kids get in at 2:45pm. I don’t plan on checking into the hotel until after I pick up the wife and kids from the airport. I will have a rental car.

Does anyone have any suggestions for what I can do in the meantime?

what I am looking for:
-a place where I can walk around, relax, and enjoy some sunshine (I am from Seattle)
-Preferably near the water
-I would like to try some good Cuban food for lunch
-close enough to the airport that I am not spending a long time on the road since I will be leaving the airport around 7:30am and attempting to arrive back at the airport about 2:30pm

Thank you in advance for any ideas.

South Miami Beach is about 20 minutes from the airport. Just take 836 (Flamingo Expressway) east, go across the MacArthur Causeway, and you get dropped into South Beach. Haven’t been there in years, so I can’t help much other than that. The News Cafe (8th and Ocean Drive) is probably still there, so you can get some coffee and watch the world go by.