The Hottest Florida Beaches to Visit in December

Average December Temperature: 77°F / 70°F (day/night)

Average Water Temperature: 76°F

As Florida’s southernmost point, Key West boasts the warmest December temperatures in the continental United States.  This island paradise features pristine beaches with crystal-clear waters that remain comfortable for swimming throughout winter.  Smathers Beach, the largest beach in Key West, offers soft white sand and shallow waters perfect for families.

Beyond sunbathing, visitors can enjoy world-class snorkeling, kayaking through mangroves, or taking a sunset cruise to witness the island’s famous evening spectacle.  The vibrant Duval Street comes alive with holiday decorations in December, while maintaining its characteristic laid-back atmosphere.

Pro Tip: For a truly unique experience, take the 70-mile journey to Dry Tortugas National Park, where you can explore historic Fort Jefferson and snorkel in some of the most pristine waters in Florida.

Average December Temperature: 76°F / 65°F (day/night)

Average Water Temperature: 77°F

Miami Beach ranks among the warmest Florida beaches in December, offering visitors a perfect blend of natural beauty and vibrant city life.  South Beach, with its iconic Art Deco architecture and wide shoreline, provides an energetic atmosphere where winter feels like a distant concept.

The crystal-clear waters remain invitingly warm at 77°F, ideal for swimming and water sports.  Visitors can paddleboard in the calm morning waters, join a beach yoga class or simply relax on the famous white sands.  For families, South Pointe Beach offers a more relaxed setting with a playground and splash pad for younger travelers.

Pro Tip: Visit during the first week of December to experience Art Basel, one of the world’s premier art shows, which transforms Miami into a global cultural hub with events and exhibitions throughout the city.

Average December Temperature: 78°F / 68°F (day/night)

Average Water Temperature: 77°F

Islamorada, known as the “Village of Islands,” offers some of the warmest beaches in Florida during December.  This Florida Keys gem provides a more relaxed alternative to Key West while maintaining those desirable warm temperatures that winter travelers seek.

Anne’s Beach is perfect for families with its shallow, crystal-clear waters and shaded picnic areas.  Meanwhile, Founders Park offers 45 acres of recreational space including a beach, marina and even a shallow-water lagoon ideal for younger swimmers.  The consistently warm waters make Islamorada a premier destination for snorkeling, kayaking and paddleboarding throughout December.

Pro Tip: Islamorada is known as the “Sportfishing Capital of the World.” Book a charter to experience some of the best winter fishing available anywhere, with species like sailfish and tuna particularly active in December.

Average December Temperature: 78°F / 60°F (day/night)

Average Water Temperature: 76°F

Palm Beach combines luxury with natural beauty, making it one of the hottest Florida beaches in December both in temperature and popularity.  This barrier island offers pristine beaches with powdery white sand and clear waters that remain comfortable for swimming throughout winter.

Visitors can enjoy world-class shopping along Worth Avenue, explore the stunning Flagler Museum, or simply relax on the beach.  For surf enthusiasts, Reef Road offers some of the best surfing conditions on Florida’s East Coast, particularly during winter months when northern swells arrive.

The area’s upscale resorts provide exceptional beachfront dining options, where you can enjoy fresh seafood with ocean views even in December.

Pro Tip: Visit the Henry Morrison Flagler Museum, a 75-room Gilded Age mansion, which is spectacularly decorated for the holidays during December, offering a unique cultural experience between beach sessions.

Average December Temperature: 78°F / 64°F (day/night)

Average Water Temperature: 77°F

Fort Lauderdale Beach offers seven miles of stunning coastline with consistently warm temperatures, making it one of the hottest Florida beaches in December.  The beach’s signature wave wall promenade provides a perfect setting for morning jogs or sunset strolls in comfortable weather.

With water temperatures hovering around 77°F, swimming remains pleasant throughout December.  Visitors can also enjoy paddleboarding through the city’s famous canal system, often called the “Venice of America,” or take a water taxi to explore the waterfront restaurants and shops.

Las Olas Boulevard, just minutes from the beach, offers excellent dining and shopping options for when you need a break from the sun.

Pro Tip: Don’t miss the Winterfest Boat Parade in mid-December, when hundreds of boats decorated with holiday lights cruise through Fort Lauderdale’s waterways in a spectacular display visible from many waterfront locations.

Average December Temperature: 74°F / 55°F (day/night)

Average Water Temperature: 72°F

Siesta Key offers some of the most beautiful beaches in Florida, with its famous quartz sand that stays cool underfoot even on warm December days.  While slightly cooler than the southernmost Florida beaches, Siesta Key still provides comfortable beach weather when much of the country is experiencing winter’s chill.

The beach is known for its powdery white sand and crystal-clear Gulf waters.  Crescent Beach offers a more secluded experience, perfect for shell collecting and peaceful walks.  The shallow water near shore makes it ideal for families with young children.

Siesta Key Village, just a short walk from the beach, offers charming shops and restaurants with outdoor seating to enjoy the pleasant December temperatures.

Pro Tip: Visit the beach at sunset for the nightly drum circle that gathers on Siesta Beach every Sunday about an hour before sunset, creating a unique cultural experience that continues year-round thanks to Florida’s warm climate.

Average December Temperature: 70°F / 60°F (day/night)

Average Water Temperature: 69°F

While Clearwater Beach may not be the absolute warmest Florida beach in December, it still offers comfortable temperatures and remains one of the state’s most beloved winter destinations.  The beach’s soft white sand and clear, calm waters continue to attract visitors even as temperatures cool slightly.

December visitors can enjoy less crowded beaches while still experiencing pleasant weather for sunbathing, beach walks, and outdoor dining.  Water activities like dolphin-watching cruises and paddleboarding remain popular, though some visitors may find the water a bit cool for extended swimming.

Pier 60 hosts a nightly sunset celebration with street performers and craft vendors, creating a festive atmosphere throughout the holiday season.

Pro Tip: Visit the Clearwater Marine Aquarium, home to rescued marine animals and famous for Winter the dolphin from the movie “Dolphin Tale.” December often means smaller crowds and more personal experiences with the facility’s residents.

Understanding Florida’s December weather patterns helps ensure you pack appropriately for your beach getaway.  While the state generally offers warm temperatures compared to most of the country, there are still important considerations to keep in mind.

Typical December Weather Patterns

• Daytime temperatures range from 70-78°F depending on location (warmer in southern regions)
• Evening temperatures can drop to 55-70°F, requiring light layers
• Water temperatures range from 69-77°F (warmest in the Keys and Miami)
• Low rainfall with an average of only 2 inches statewide
• Moderate humidity levels around 74%
• Occasional wind, averaging around 14 mph

Essential Packing List

• Swimwear (at least two sets)
• Light, breathable clothing for daytime
• Light jacket or sweater for evenings
• Beach cover-up or light wrap
• Sunscreen (minimum SPF 30)
• Polarized sunglasses
• Wide-brimmed hat for sun protection
• Beach sandals and comfortable walking shoes
• Waterproof phone case or dry bag
• Reusable water bottle

As winter tightens its grip across much of the United States, Florida’s beaches offer a sun-soaked sanctuary where you can trade snow for sand and cold for comfort.  The hottest Florida beaches in December provide not just an escape from winter weather, but a chance to experience a unique holiday season filled with sunshine, outdoor activities, and festive beachside celebrations.

From the southernmost shores of Key West to the vibrant beaches of Miami and Fort Lauderdale, Florida’s diverse coastline ensures there’s a perfect warm-weather destination for every type of traveler.  Families can enjoy safe swimming areas and holiday events, couples can find romantic sunset spots and adventure seekers can explore water sports that remain accessible thanks to Florida’s mild winter climate.

As you plan your winter escape, remember that the southernmost beaches offer the warmest temperatures, but even Florida’s central and northern beaches provide a welcome respite from winter’s chill.  Pack your swimsuit alongside a light jacket for evenings, and prepare to experience the magic of a beach holiday season.