A common question among snorkeling enthusiasts planning a trip to Key West is, “Is it too cold to snorkel in Key West in January?

The straightforward answer is no. While January does bring lower temperatures to this Florida paradise, it is typically not too cold to partake in your favorite underwater pastime.

That being said, each person’s tolerance to cooler water varies, so this subjective experience can differ from one individual to another.

Quick Answer

  • Temperatures in Key West in January
  • Water temperature and its effect on marine life
  • Recommendations for snorkeling gear in cooler temperatures
  • The benefit of fewer crowds in January
  • The stunning winter marine sights

Let’s expand on these points for a more detailed understanding.

Temperatures In Key West In January

Key West, located at the southernmost tip of the Florida Keys, experiences subtropical weather, with mild and sunny winters.

In January, the air temperatures generally range from the mid-60s to the high 70s in degrees Fahrenheit (around 18 to 25 degrees Celsius).

Though this might be cooler than the balmy summer months, it’s still pleasant for outdoor activities, including snorkeling.

Water Temperature & Its Effect On Marine Life

The water temperature in Key West in January hovers around the 70-degree Fahrenheit mark (approximately 21 degrees Celsius).

While this might seem a tad cooler compared to summer months, it is still suitable for snorkeling. What’s more, the cooler water can lead to interesting changes in marine life behavior and presence, making winter snorkeling a unique experience.

You can still expect to see the abundant tropical fish, stingrays, and possibly even a sea turtle or two!

Recommendations For Snorkeling Gear In Cooler Temperatures

While some hearty souls might be perfectly comfortable snorkeling in a swimsuit, others may prefer a bit more thermal protection.

In that case, a thin wetsuit, a dive skin, or a rash guard can add a layer of warmth without sacrificing mobility.

Remember, it’s essential to feel comfortable and safe while snorkeling, so gear up as per your comfort level.

The Benefit Of Fewer Crowds In January

January is outside the peak tourist season in Key West, which means fewer crowds both on the beaches and in the water.

This reduction in human activity often leads to a more relaxed and personal snorkeling experience.

Not to mention, hotel rates are often lower during this off-peak season, which could mean a more cost-effective vacation for you.

The Stunning Winter Marine Sights

Cooler water temperatures can lead to unique marine life behavior. For instance, during the winter months, you may witness increased activity from the manatee population as they migrate to warmer waters.

Some types of fish might come closer to the surface, seeking warmer water, providing snorkelers with an up-close encounter.

Additionally, the winter light creates stunning underwater visuals, making your snorkeling experience even more memorable.

Winter Marine Life In Key West

During the winter months, the marine life in Key West undergoes a shift as some species migrate towards the warmer waters and others come closer to the surface.

This means that snorkelers can expect to see different creatures than they might during the summer months.


One of the most beloved creatures of Florida’s waters, the manatee, tends to move closer to the coast in the winter.

The manatees migrate towards the warmer waters of the springs during the winter. Snorkeling during this time increases the chance of having a delightful encounter with these gentle giants.

Tropical Fish and Corals

Despite the cooler temperatures, the tropical fish and corals that Key West is known for remain vibrant and active. From yellowtail snapper to angelfish and parrotfish, the variety of tropical fish visible in the winter is spectacular.

Coral reefs, too, continue to be a visual treat. Species such as elkhorn and brain corals are common sights.

Stingrays & Sea Turtles

Sightings of southern stingrays gliding through the waters are also quite common in the winter months. Similarly, sea turtles such as loggerheads and green turtles can be seen during snorkeling excursions.

Snorkeling Tours In January

Several snorkeling tour operators in Key West operate year-round, taking advantage of the region’s mild winters.

These guided tours offer a great way to experience the best snorkeling spots in Key West. Snorkeling tours often include equipment, making it easier for those who do not wish to pack their gear.

Safety Measures

Even though snorkeling in Key West in January is a fascinating experience, it is vital to keep safety in mind. The cooler temperatures mean that hypothermia can be a risk if you stay in the water for extended periods without proper protection.

Wearing a thin wetsuit can help in this regard. Also, remember to respect the marine life and keep a safe distance, especially from the more sensitive creatures like coral and sea turtles.

Final Thoughts

To wrap it all up, January is a splendid time for snorkeling in Key West. The cooler temperatures bring with them a unique mix of marine life and a more serene snorkeling experience with fewer crowds.

With the right gear, an adventurous spirit, and potentially fewer crowds, you might find snorkeling in January to be a unique and rewarding experience.

So don’t let the winter month deter you; instead, consider it an opportunity to experience Key West’s marine life from a different perspective.


  1. Key West Climate. Retrieved from https://www.weather-us.com
  2. Marine Life in Key West. Retrieved from https://www.fishid.com
  3. Snorkeling Safety Tips. Retrieved from https://www.redcross.org
  4. Florida Keys Tourism Statistics. Retrieved from https://www.fla-keys.com
  5. Manatee Migration. Retrieved from https://www.savethemanatee.org
  6. Manatee Migration. Retrieved from https://www.savethemanatee.org
  7. Florida Fish and Wildlife Conservation Commission. Retrieved from https://myfwc.com
  8. Coral species in Florida. Retrieved from https://floridakeys.noaa.gov
  9. Key West Snorkeling Tours. Retrieved from https://www.keywestaquarium.com
  10. Snorkeling Safety. Retrieved from https://www.redcross.org