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Key West Weather

Key West Weather

SPOILER ALERT: The weather in Key West is awesome. Warmed by sun and sea, cooled by wind and rain, Key West weather is always great. Let Cool Key West help you plan a frost-free vacation in tropical Key West.

The Florida Keys form a barrier that divides the Gulf of Mexico from the Atlantic Ocean, with the waters of the two merging in the Straits of Florida between Key West and Cuba. The uniformly great Key West weather arises from this location between the two differing bodies of water, as well as from the island’s tropical latitude. The Gulf is much warmer and calmer than the Atlantic, and has a major current that drives heated water along both sides of the Keys.

The Gulf Loop Current is a primary factor in Key West weather. The Loop is born of water pushed by the Earth’s rotation from the Atlantic onto the coast line of Central America and up into the western Gulf, where it runs up the coast of Mexico, across the Southern seaboard of the U.S., and down the western Florida shoreline. The moving water picks up heat along the way, and as it exits the Gulf running east through the Straits of Florida, it is very warm. With surface temperatures averaging 75 to 77°F from December through February, it is the warmest ocean water on the United States mainland.This warm water keeps the Key West weather very mild and stable, with only about a 15°F variation in mean monthly temperatures throughout the year.

The Keys are the only U.S. mainland location where frost or freezing temperatures have never been recorded. The lowest temperature recorded in Key West was 41°F on January 12, 1886, and again on January 13, 1981. Summer temperatures are moderate as well, mellowed by easterly trade winds and local sea breezes drawn off the cool waters of the Atlantic. While Key West weather in the summer may certainly feel hot, the record high summer temperature mark is only 97°F.

Although it might be imagined that a tropical location like Key West is rainy, the island actually has a tropical savannah climate similar to the Caribbean islands rather than a rainforest or monsoon climate. The island has a pronounced dry season and gets only 39 inches of rain per year, a little more than the U.S. average of 37 inches and much less than the 50 to 60 inch average common to the rest of Florida.

The weather in Key West is characterized mainly by the wet and dry seasons. In the months of November through April, the island receives many of its average 260 sunny days per year and about 25 percent of the annual rainfall, usually in advance of cold fronts that move in from the northeast in waves. The wet season runs from May through October, with numerous showers and thunderstorms bringing in about 53 percent of the yearly precipitation, often as early morning rains that are followed by intensely hot afternoon sun.

Unlike mainland Florida and the Gulf Coast, Key West is not often the direct target of hurricanes. The average time between direct hits is 5.88 years, with a 21 year gap between hits occurring from 1966-1987. However, when close brushes are factored in, the island receives some storm effects every 2.71 years. Most tropical storms tracking through the Gulf tend to move north of the Keys, but the island can be affected by the wind and rainfall of storm systems that are hundreds of miles away. Due to the low-lying nature of the Keys, they are vulnerable to the storm surges and rain-fall induced flooding common to tropical storms.

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  • Sunset Sip & Sail

    Sunset Sip & Sail: Come see the legendary Key West Sunset on a Brand New Catamaran Sail Boat. • Open bar • Live Music •...
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     2 hours  Instant Confirmation
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    $74.95
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    $74.95
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    Key West Sunset Snorkel Sail

    8

    Enjoy this 3 hour sunset combo trip. We will sail out to Key West’s best reef location, where you are welcome to jump in and...
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     3 hours  Instant Confirmation
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    $74.95
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    $74.95
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  • Key West Dolphin Watch Sunset Snorkel Cruise

    6

    The Sunset Watersports Dolphin watch triple combo is the best way to watch Dolphins, Snorkel the Key West tropical waters, and see the world famous...
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     3 hours  Instant Confirmation
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    $74.95
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    $74.95
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  • Key West Safari Snorkel Adventure

    Explore Key West in a fun and unique way! Avoid the crowds on this exciting snorkel safari adventure and captain your own speedboat through 28...
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     2 hours 30 minutes  Instant Confirmation
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    $197.12
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    $197.12
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    Snorkel and Sunset Sail: Rum n’ Reggae

    This Caribbean-themed trip offers two bucket list items that Key West is famous for - a tropical coral reef and amazing sunsets. Rum punch, lively reggae...
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     3 hours  Instant Confirmation
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    $56.12
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    $56.12
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    Island Adventure Snorkel Kayak and Tour

    Discover a different side of Key West as you explore a secluded paradise in the Florida Keys backcountry on this Island Adventure. Tucked away between...
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     4 hours 30 minutes  Instant Confirmation
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    $128.95
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    $128.95
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    Key West Schooner Appledore Backcountry Eco-Tour: Sail, Snorkel & Kayak

    Set sail from Historic Seaport on the Key West Schooner Backcountry Eco-Tour adventure!...
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     5 hours  Instant Confirmation
    Best Rate
    $109.95
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    Best Rate
    $109.95
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    Key West Snorkeling

    Rise and Reef Key West Snorkel Trip on The 65 foot custom built Sandie Cat. Your 3 hour snorkel trip will start with a Light...
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     3 hours  Instant Confirmation
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    $46.94
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    Top10

    Key West Original Watersports Adventure with Breakfast, Lunch & Drinks

    This Key West experience lets you enjoy all that the island has to offer. Sail on a sleek catamaran along the smooth waters of the...
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     6 hours  Instant Confirmation
    $199.95
    $169
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    $199.95
    $169
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    Key West Parasailing Adventure

    Float high above and parasail the Atlantic waters for a bird’s eye view of Florida’s beautiful Key West, the Southernmost Point in the US. This...
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     1 hour (approx.)  Instant Confirmation
    Best Rate
    $89.95
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    Best Rate
    $89.95
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    Key West Snorkeling Adventure

    Envision yourself swimming freely among the vibrant fish of the Florida Keys during a Key West snorkeling tour. This tranquil catamaran cruise provides easy snorkeling...
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     3 hours  Instant Confirmation
    Best Rate
    $49.95
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    Best Rate
    $49.95
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    Key West Dolphin Watch and Snorkel Cruise

    Get in touch with one of nature's friendliest mammals on this relaxing 3-hour dolphin cruise from Key West. Sail alongside playful dolphins and take in...
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     3 hours  Instant Confirmation
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    $75.20
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    $75.20
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    Key West Full-Day Catamaran Eco Tour

    Beautiful Key West is surrounded by sparkling blue waters of the Gulf of Mexico, making kayaking and dolphin watching the perfect way to spend a...
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     6 hours (approx.)  Instant Confirmation
    $124.95
    $119.95
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    $124.95
    $119.95
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    Key West Living Coral Reef Snorkel Adventure

    Your sailing and Key West snorkeling adventure begins as you board a state-of-the-art catamaran, part of the largest and most luxurious catamaran fleet in the...
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     3 hours  Instant Confirmation
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    $46.92
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    Key West Conch Tour Train

    Experience the best of Key West on the famous Conch Tour Train! One of Florida’s most popular attractions, the Conch Tour Train has been entertaining...
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     1 hour 30 minutes  Instant Confirmation
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    $39.85
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    $39.85
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  • Key West Snuba® (No Dive Certification Required)

    If you want to go beyond snorkeling and experience the world's underwater beauty in the safest and easiest way possible, try Snuba®!...
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     3 hours  Instant Confirmation
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    $145
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    $145
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    Top10

    Key West Dolphin Watch & Snorkel Tour with FREE shuttle to location

    Board the Dolphin Watch & Snorkel Cruise Key West for a journey to observe the beauty of Key West dolphins....
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     3.5 Hours (approx.) Hotel pickup offered  Instant Confirmation
    $89
    $86.69
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    $89
    $86.69
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    Top10

    Key West Backcountry Safari

    Spend an unforgettable day sailing emerald waters, kayaking mangrove-shaded channels and snorkeling coral gardens in an unspoiled marine wilderness....
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     6.5 or 4.5 hours (approx.)  Instant Confirmation
    $120
    $115
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    $120
    $115
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  • Key West Old Town Trolley

    The hop-on hop-off trolley tour of Key West is a fantastic way to explore this historic island. Sit back and relax while your expert tour...
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     1 hour 30 minutes  Instant Confirmation
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    $50.35
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    $50.35
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    Top10

    Key West Sail, Snorkel, Kayak with Sunset Option

    Enjoy an unforgettable morning or afternoon of sailing, kayaking and snorkeling in the pristine marine wilderness of the Key West National Wildlife Refuge....
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     4.5 or 6.5 hours (approx.)  Instant Confirmation
    $99
    $90
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    $99
    $90
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  • Key West Dolphin Snorkel Safari (max 6 guests)

    Indulge your senses as you pass over natural sands through the blue waters of Key West into the playgrounds of wild dolphins on Dolphin Snorkel...
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     3 Hours (approx.)  Instant Confirmation
    Best Rate
    $99
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    Best Rate
    $99
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