Key Colony Beach is part of Marathon Key, which is a 10-mile stretch of island two hours south of Miami International Airport in the middle of the Keys island chain. With its crystal aquamarine waters, warm ocean breezes, and slow island living, it’s a place filled with endless possibilities!

Fishing and boating abound in this tropical paradise, not to mention the delicious seafood restaurants available in town. Whether the purpose of your trip is to spend time with family or a romantic getaway, the options here are endless.

Enjoy an old-Keys lifestyle with annual seafood festivals, waterside restaurants that harvest fresh fish, lobster and stone crab claws from local waters, and a community filled with nothing but friendly locals and happy smiles.

When you need an excursion, you can drive one hour to visit Key West and the home of Ernest Hemingway.

The average yearly temperature in Marathon Key, Florida is 78°F with an average high of 83°F and an average low of 78°F.

WEATHER: Monthly Averages
Jan Feb Mar Apr May Jun
High 75° 77° 79° 83° 87° 90°
Low 64° 66° 69° 72° 76° 79°
Rainfall 1.6 in. 2.2 in. 2.4 in. 2.3 in. 3.3 in. 5.5 in.
Jul Aug Sep Oct Nov Dec
High 91° 91° 89° 85° 80° 77°
Low 79° 79° 78° 76° 71° 67°
Rainfall 4.2 in. 7.0 in. 7.7 in. 4.7 in. 2.8 in. 2.0 in.

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Marathon Key, Florida

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