If the get-away is one where you won't have your boat, AND warmth and beaches are the agenda, it is hard to beat Hawaii.
Joan and I used to treat ourselves to beachy escapes each year before we retired. You could go to southern Texas, the Florida Keys, or San Diego in January, but you can't be sure you won't hit a cold week. We have done Mexico numerous times, but you have to get as far south as Cabo, Cancun, or Puerto Vallarta to get to a pretty-much-guaranteed warmth in January.
All that considered, you simply can't go wrong with Hawaii. The west coast of Maui (Kaanapali or further south to Kihei) is our favorite, after 19 or 20 times of visiting the Aloha State. The other islands are spectacular, as well, but we have always run into beautiful weather on Maui.
Our home is in the "Tropical Tip of Texas." Swaying palm trees and wonderful beaches. But, south Texas (same latitude as Naples, FL) can get northers just like Florida. Spending the whole winter season? Any of the 3 mainland areas I mentioned above will consistently give you better weather than the frozen northland. BUT, if this is an "escape," and "beachy and warmth" are important parts of the equation, go west... WAY west... and learn about the Aloha spirit.
Bring a high-limit credit card... you can buy all the beachy stuff you need there. If you stay in a condo (our preference), they may have beach mats and chairs. If not, pull out that credit card and get what you need. Rent a convertible, and cruise with the top down. Go for a different sunset cruise each night (see who has the best Mai Tais), dine at the beach in Whaler's Village (Leilani's on the beach, or the Hula Grill, where you can have your feet in the sand while you eat). Walk through Lahaina, great art shops and more restaurants (I'm fond of Cheesburger in Paradise at sunset). Do a luau if you have never done one - The Old Lahaina Luau has a good show and luau, much better than those at the big hotels.
If some of that stuff sounds "touristy"... that's why you're there! Enjoy the sun and the beaches. Go snorkeling. Get up REALLY early and to go the top of Haleakala to see a sunrise that you will remember for the rest of your life... you can "bike the volcano" on the way down with one of the bike companies who offer that tour. Get in the convertible and drive to Maui's north shore, just beyond the town of Paia (where the surf, wind surfing, and kite surfing will amaze you). It will take you an entire day to make the drive to Hana, with 56 one lane bridges and 617 hairpin curves... you may want to save that for your next time there, so you don't lose a whole day of beachy stuff.
Dang, I get all fired up about it, just writing this. The only downside for us is the long commercial flight to get there... and back. If you haven't been there, it IS worth it. (I just hate flying commercial these days.) Some people consider it a once-in-a-lifetime trip. Many start scheming how they will get back before they even leave.
Good luck with the plans. Wherever you decide to go, DO NOT put it off again. Escape the cold and see what it does for love-life. :hot :love :lips
Best wishes,
Jim B.