Islamorada — Water Temperature, Sea Conditions & Trends
This page provides clear and up-to-date information about water temperature for Islamorada (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 Islamorada help you plan your visit and choose the best time for swimming.
Current Water Temperature
Water temperature in Islamorada in the Atlantic Ocean today is 29°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature is above 82°F (28°C). This is very warm water, which may feel almost hot to most people. Swimming in such conditions is perfect for those seeking relaxation and comfort in the water. These waters are often preferred for relaxation in hot weather, as the water temperature does not cool the body significantly. However, it is important to remember that in such warm waters, caution is necessary, as prolonged exposure without rest can lead to overheating.
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 Islamorada has fallen over the last month but risen over the last 7 days. Currently, the sea water temperature at this location matches the average for this day in previous years.
According to our forecast, Water temperature in Islamorada will be 28.9°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 |
|---|---|---|---|
| JUN 4 | 30.0°C | 28.3°C | |
| JUN 5 | 29.9°C | 28.8°C | |
| JUN 6 | 29.0°C | 28.5°C | |
| JUN 7 | 28.7°C | 29.3°C | |
| JUN 8 | 28.6°C | 28.8°C | |
| JUN 9 | 28.9°C | 29.0°C | |
| JUN 10 | 29.2°C | 29.5°C | |
| JUN 11 | 29.2°C | 29.5°C | |
| JUN 12 | 29.2°C | 29.5°C | 29.2°C |
| JUN 13 | 29.3°C | 29.2°C | |
| JUN 14 | 29.0°C | 29.1°C | |
| JUN 15 | 28.8°C | 29.1°C | |
| JUN 16 | 28.8°C | 29.0°C | |
| JUN 17 | 28.8°C | 29.0°C | |
| JUN 18 | 28.8°C | 29.0°C | |
| JUN 19 | 29.0°C | 28.9°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
Islamorada, located in the upper Florida Keys, enjoys subtropical marine conditions that keep surrounding waters relatively warm year-round. Seasonal sea surface temperatures typically range from about 20–24 °C in the winter months, rise to roughly 23–27 °C in spring, peak around 28–31 °C through the summer, and cool to approximately 26–29 °C during autumn. Short-lived cold fronts can occasionally push temperatures toward the low 20s °C in winter, while late summer and early fall usually bring the warmest and most stable water conditions. Water clarity is generally good, especially around the reefs and in the shallower backcountry, though weather and tides can affect visibility.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 19°C | 22°C | 26°C |
| February | 19°C | 24°C | 27°C |
| March | 20°C | 24°C | 28°C |
| April | 22°C | 26°C | 29°C |
| May | 24°C | 28°C | 33°C |
| June | 26°C | 29°C | 32°C |
| July | 27°C | 30°C | 34°C |
| August | 28°C | 31°C | 34°C |
| September | 27°C | 30°C | 33°C |
| October | 24°C | 29°C | 31°C |
| November | 21°C | 25°C | 28°C |
| December | 20°C | 23°C | 27°C |
* Click on a month to view detailed water temperature data.
Islamorada: Weather Forecast
June 14
June 15
June 16
June 17
Location, Beaches & Local Information
Nearby Beaches & Facilities
The Moorings
Founders' Park Beach
Swimming Conditions
Swimming and beach holidays in Islamorada center more on sheltered bays, shallow sand flats and easy access to coral reefs than on large stretches of sandy shoreline. The warm summer and late spring waters are ideal for snorkeling, free-diving and casual swimming, with calm mangrove-lined bays and flats that suit families and paddlers. Reef swims and boat-based drop-offs provide opportunities to see coral, fish and other marine life, but swimmers should be mindful of currents on the Atlantic side and seasonal occurrences such as jellyfish or man‑of‑war in late summer. Winter swimmers sometimes opt for lightweight wetsuits when temperatures dip into the low 20s °C. Overall, Islamorada offers a strong mix of water-based recreation year-round, with the best beach-style swimming conditions from late spring through early autumn, while hurricane season (June–November) can occasionally disrupt plans.