U.S. retirees living in Europe tend to favor destinations with warmer climates for a variety of reasons, such as health benefits and a desire for a lifestyle that allows for outdoor activities year-round. Based on feedback from expatriate communities and various rankings, here are some of the top warm climate destinations favored by U.S. retirees in Europe:

The Algarve, Portugal

Consistently ranked high for its mild year-round climate, beautiful beaches, and retiree-friendly cost of living. It's also recognized for its retiree-centric amenities and English-speaking services.

Costa del Sol, Spain

From Malaga to Marbella the Costa del Sol offers plenty of sunshine, excellent healthcare, and a cost of living that can be quite affordable compared to other parts of Europe.

Sicily and Southern Italy

With its Mediterranean climate, rich history, and delicious cuisine, southern Italy is a favorite for those seeking warmth, culture, and a welcoming, friendly population.

Crete, Greece

Known for its idyllic beaches, ancient ruins, and the Mediterranean diet, Crete has a very appealing climate for retirees along with one of the longest life expectancies in Europe.

Malta

Offers a subtropical climate, historical sites, and English as one of its official languages, which is a significant plus for American retirees. It's also a banking and brokerage center.

Cyprus

It has warm winters and hot summers, and many coastal towns are popular among retirees for their communities and amenities. Due to its history as a British colony until 1960, English is widely spoken and understood across the island.

French Riviera

While it can be expensive, it's popular for its mild winters and vibrant expat community. It's a great place to people watch as the rich and famous from around the world visit often.

Madeira, Portugal

Known for its eternal spring-like weather, the island of Madeira offers natural beauty, and a welcoming atmosphere.

Canary Islands, Spain

Has a subtropical climate with very mild winters. The Canary Islands are directly south of Madeira close to the border of Morocco and the Western Sahara. It is popular for its diverse landscapes and affordable living costs.

Dalmatian Coast, Croatia

Offers a warm Mediterranean climate, stunning coastlines, and has been gaining popularity due to its relatively lower cost of living and beautiful scenery.

These destinations are praised not only for their warm climates but also for their quality of life, accessibility to healthcare, expat communities, and, in many cases, favorable tax policies for retirees. However, the "best" destination can vary widely depending on personal preferences, financial situations, and desired lifestyle.