Sea Water Temperature Key Largo

Seawater temperature Key Largo overview

The seawater temperature Key Largo varies throughout the year with warmest water in August.  The coldest water is usually in January. Wind direction and the proximity of the Gulf Stream affect the water temperature as well as the season. The depth of water you are in and that surrounds you will also have an effect. We find that the seawater temperature can change from one end of a reef to another by just a degree or two!

Our rental gear has 3mm wetsuits both shorties and full wetsuits.  Sizes from XS to XXXL and everything in between.  Our full wetsuits are the newest Akona stretch fabric for your comfort.

Todays Seawater temperature

Click here to see the live seawater temperature and wave height from from or friends at aqualink.org for Horseshoe reef, Key Largo, Florida.

Seawater temperature Key Largo January and February

Water temperature is around 70-75F. Full 3mm wetsuits required for SCUBA diving, Maybe a hood on the colder days. Boat trips in the afternoon are more popular as the air temperatures have usually warmed up by midday. For snorkeling you can choose between full wetsuits or a shorty that is easier to get on and off.

Its alway a good idea to bring a waterproof with you to put over your wetsuit during dive intervals. This is because the air temperature is likely to be cooler than the water temperature and the wind will cool the water in the wetsuit down to the air temperature making you fell chilly. Either that or remove the wetsuit completely.

Bring hot drinks in flasks for those chilly days!

Seawater temperature Key Largo March and April

Water temperature is around 75F-77F. Were getting into 3mm shortie wetsuits as the water warms up. During these months it really depends on where you are from as the weather you need a wetsuit to snorkel, if you are from Florida you may find the water cold, if you are from more or less anywhere else it appears to be quite warm! We can still get days when the North wind blows and brings cold air with it causing it to be a bit chilly.

Seawater temperature Key Largo May and June

Great months for diving with water around 80F. Yay were out of wetsuits! long sleeve rash guards and shorts recommended. The island is less crowded at this time and so are the reefs. The big pelagic fish have arrived and its amazing diving!

Seawater temperature Key Largo July and August

The water 85F+.  Its hot hot hot even in the water – Our favorite time of year to dive as its beautiful! The waters are often calm like a still lake and you can see the wildlife from the boat without getting into the water!

Seawater temperature Key Largo September and October

Water temperature remain high at 80F – 85F. Still not full wetsuit weather but some SCUBA divers are starting to use shorties. Snorkeling is still amazing and you shouldn’t need a wetsuit till after the middle of October. This is the peak hurricane season and we always hope that the water cools off quickly as this helps us avoid the big hurricanes as they don’t get as much energy from cooler water. We constantly keep a watchful eye on the incoming weather from Africa but generally we get around 5 days notice for incoming hurricanes.

Seawater temperature Key Largo November and December

Water temperature around 79F. Back in shortie wetsuits and sometimes full wetsuits needed.

Current Seawater temperature Key Largo

Check out our weather page for daily updates on weather and seawater temperatures

Click here to see the current conditions and seawater temperature in Coral City Miami, Florida provided by our friends at aqualink.org