Warmest Beaches in the U.S. (Year-Round)

Warmest Beaches in the U.S. (Year-Round) – Sun, Warm Water & Endless Beach Days

Looking for warm beaches in the U.S. you can enjoy in the winter — or anytime of year? While most American beaches cool down from November to March, a few destinations offer sun, warm sand, and swimmable water even in the coldest months. This guide highlights the warmest year-round beaches in the United States.

From Southern California’s mild winter beaches to Florida’s tropical warmth and Hawaii’s always-perfect climate, these are the top spots for endless sunshine.

Why These Beaches Stay Warm Year-Round

Southern latitudes and tropical climate zones
Warm ocean currents (especially the Gulf Stream & Hawaiian waters)
Consistently sunny weather with mild winters
Ideal for winter getaways and year-round swimming

Warmest Beaches in the U.S.

These beaches offer warm air and swimmable water almost all year — even during winter months.

Waikiki Beach, Oahu, Hawaii

Water temps stay 76–81°F year-round with warm, sunny weather and gentle waves.

Poipu Beach, Kauai

Consistently warm water and sunshine make this one of Hawaii’s best winter beaches.

Kaanapali Beach, Maui

Warm water, snorkeling, and perfect weather nearly every day of the year.

South Beach, Miami, Florida

Winter water temps 72–76°F with tropical breezes, nightlife, and turquoise water.

Key West, Florida

One of the warmest locations in the continental U.S. with Caribbean-like warmth.

Marco Island, Florida

Sunny, calm, and warm most months with soft white sand and peaceful Gulf waters.

Coronado Beach, San Diego, California

Mild winter air temps (65–75°F), golden sand, and gentle surf.

Santa Monica Beach, California

Warm sunny days even in winter, plus attractions and coastal bike trails.

Laguna Beach, California

Protected coves, great weather, and a mild climate all year long.

Where to Stay for Warm Winter Beaches

Hawaii

Oceanfront resorts in Waikiki
Beach villas on Maui
Sunny South Shore stays in Kauai

Florida (Warmest Mainland Choice)

South Beach boutique hotels & high-rise resorts
Key West tropical inns & waterfront stays
Marco Island beachfront hotels & condos

Southern California

San Diego beach resorts
Laguna Beach boutique hotels
Santa Monica oceanfront stays

When Are U.S. Beaches Warm Enough for Swimming?

Location	Winter Water Temp	Winter Air Temp
Hawaii	76–81°F	78–85°F
Miami / Florida Keys	72–76°F	75–82°F
Marco Island	68–74°F	70–80°F
San Diego	58–62°F	65–75°F

Best Warm Beaches by Category (Year-Round)

Best for Swimming

Waikiki Beach, Hawaii
Key West, Florida
Poipu Beach, Kauai

Best for Families

Coronado Beach, California
Marco Island, Florida
Kaanapali Beach, Maui

Best for Winter Sun Escapes

Miami Beach
Key West
Oahu & Maui beaches

Plan Your Beach Trip

Turn your beach search into a complete trip — book stays, discover experiences, and prepare like a pro.

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FAQs — Warmest Beaches in the U.S.

What U.S. beach is warmest in winter?

Hawaii is the warmest overall; Key West and Miami are the warmest in the mainland U.S.

Where is the warmest ocean water in the U.S.?

Hawaii has the warmest ocean temperatures year-round.

Which beaches are warm enough for swimming in December?

Hawaii, Miami Beach, Key West, Marco Island, and parts of San Diego.

Is Southern California warm enough for winter beach trips?

Yes — warm air, mild sun, and great beach days, but the Pacific water is cooler.