Cudjoe Key — Water Temperature, Sea Conditions & Trends
This page provides clear and up-to-date information about water temperature for Cudjoe Key (Florida, United States). It includes the current water temperature, daily data for the last month presented in a simple chart, and a 7-day forecast. The page also compares today’s value with typical averages for this period, shows usual monthly ranges during the year, and lists nearby beaches with short descriptions. Local weather for the next few days and general details about Cudjoe Key help you plan your visit and choose the best time for swimming.
Current Water Temperature
Water temperature in Cudjoe Key in the Gulf of America today is 28°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 79°F (26°C) to 82°F (28°C). This is very warm water, allowing for extended stays without any discomfort. Swimming in these conditions will be particularly enjoyable, making it the ideal temperature range for those who want to relax in the sea. Additionally, water in this temperature range is suitable for children and elderly people, as it is comfortable for prolonged stays.
It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.
Water Temperature Chart Over the Last 30 Days
Water temperature in Cudjoe Key today is lower than both a week ago and a month ago. Currently, the sea water temperature at this location matches the average for this day in previous years.
According to our forecast, Water temperature in Cudjoe Key will be 27.2°C in the next 7 days. See the table below for daily data for the upcoming week.
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| OCT 16 | 30.0°C | 29.3°C | |
| OCT 17 | 29.7°C | 28.8°C | |
| OCT 18 | 29.7°C | 28.8°C | |
| OCT 19 | 29.7°C | 28.3°C | |
| OCT 20 | 29.6°C | 28.3°C | |
| OCT 21 | 29.2°C | 28.0°C | |
| OCT 22 | 28.6°C | 27.8°C | |
| OCT 23 | 28.4°C | 27.8°C | |
| OCT 24 | 27.7°C | 27.8°C | 27.7°C |
| OCT 25 | 27.5°C | 27.6°C | |
| OCT 26 | 26.8°C | 27.6°C | |
| OCT 27 | 27.0°C | 27.5°C | |
| OCT 28 | 27.3°C | 27.4°C | |
| OCT 29 | 27.3°C | 27.4°C | |
| OCT 30 | 27.5°C | 27.3°C | |
| OCT 31 | 27.3°C | 27.2°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.
Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts to enhance accuracy.
Water temperature data for this location is gathered from various sources, including buoys and satellite sea and ocean surface maps provided by the NOAA agency. We also incorporate data from local authorities in each specific location worldwide to ensure more accurate temperature readings.
Annual Water Temperature Overview by Month
Monthly Water Temp Ranges
Annual Water Temperature Trend
Cudjoe Key, located in the lower Florida Keys, experiences subtropical sea temperatures that stay relatively warm year-round. Typical seasonal surface temperatures generally range from about 22–24°C in the coolest winter months to around 27–30°C during the warmest summer period, with spring and autumn temperatures commonly sitting between 24 and 27°C. These figures can vary slightly with weather patterns, cold fronts or prolonged heat, but the surrounding waters rarely drop to levels that would be considered uncomfortably cold for most swimmers. The proximity of the reef tract and shallow bays helps moderate temperatures, so water conditions tend to be pleasant from late spring through early fall and still tolerable for many during winter.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 19°C | 22°C | 24°C |
| February | 19°C | 23°C | 26°C |
| March | 20°C | 24°C | 27°C |
| April | 23°C | 26°C | 28°C |
| May | 24°C | 27°C | 32°C |
| June | 26°C | 29°C | 32°C |
| July | 27°C | 30°C | 33°C |
| August | 28°C | 31°C | 33°C |
| September | 28°C | 30°C | 33°C |
| October | 25°C | 28°C | 30°C |
| November | 22°C | 26°C | 29°C |
| December | 22°C | 24°C | 27°C |
* Click on a month to view detailed water temperature data.
Cudjoe Key: Weather Forecast
October 25
October 26
October 27
October 28
Location, Beaches & Local Information
Nearby Beaches & Facilities
Sugarloaf Beach
Swimming Conditions
Swimming around Cudjoe Key is more of a mixed shore-and-boat experience rather than classic long sandy beach bathing. The island’s shoreline is often mangrove-lined or developed with docks, so many visitors enter the water from docks, private shorelines or by boat to reach nearby reef and patch reef sites a short distance offshore. Those sites offer excellent snorkeling and scuba opportunities in clear, warm water, with abundant marine life and coral formations. Kayaking, paddleboarding and calm-bay swimming are also popular when winds are light; swimmers should be mindful of boat traffic, occasional currents and local marine life. For travelers seeking long sandy beaches, nearby Keys or mainland Florida offer more traditional options, but for warm-water snorkeling, diving and relaxed swimming, Cudjoe Key provides consistently inviting conditions.