Siesta Key — Water Temperature, Sea Conditions & Trends
This page provides clear and up-to-date information about water temperature for Siesta 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 Siesta Key help you plan your visit and choose the best time for swimming.
Current Water Temperature
Water temperature in Siesta 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 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 Siesta Key rose over the last 30 days but fell over the last week. Currently, the sea water temperature at this location matches the average for this day in previous years.
According to our forecast, Water temperature in Siesta Key will be 29.4°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 3 | 29.4°C | 28.5°C | |
| JUN 4 | 29.4°C | 28.5°C | |
| JUN 5 | 29.4°C | 28.8°C | |
| JUN 6 | 29.2°C | 28.3°C | |
| JUN 7 | 28.8°C | 28.5°C | |
| JUN 8 | 28.6°C | 28.5°C | |
| JUN 9 | 28.3°C | 28.8°C | |
| JUN 10 | 28.4°C | 29.3°C | |
| JUN 11 | 28.4°C | 29.3°C | 28.4°C |
| JUN 12 | 29.3°C | 28.5°C | |
| JUN 13 | 29.3°C | 28.7°C | |
| JUN 14 | 29.3°C | 28.8°C | |
| JUN 15 | 29.3°C | 29.0°C | |
| JUN 16 | 29.5°C | 29.1°C | |
| JUN 17 | 29.8°C | 29.2°C | |
| JUN 18 | 29.0°C | 29.4°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
Siesta Key, located on Florida’s Gulf Coast near Sarasota, is known for its wide, powdery-white sand beaches and generally gentle Gulf waters. Sea temperatures around Siesta Key fluctuate with the seasons: in winter (December–February) they commonly sit around approximately 16–21 °C, spring (March–May) brings a gradual rise into roughly 20–26 °C, summer (June–August) sees the warmest conditions often between about 27–31 °C, and autumn (September–November) typically ranges from about 24–29 °C as the sea slowly cools. These figures are seasonal averages and can vary year to year with weather patterns, but they give a clear sense of when the water is coolest and warmest for visitors planning time in the ocean.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 15°C | 18°C | 23°C |
| February | 15°C | 19°C | 23°C |
| March | 16°C | 21°C | 27°C |
| April | 20°C | 24°C | 28°C |
| May | 22°C | 27°C | 30°C |
| June | 26°C | 29°C | 32°C |
| July | 28°C | 30°C | 33°C |
| August | 27°C | 31°C | 34°C |
| September | 28°C | 30°C | 32°C |
| October | 23°C | 27°C | 31°C |
| November | 20°C | 24°C | 27°C |
| December | 16°C | 20°C | 24°C |
* Click on a month to view detailed water temperature data.
Siesta Key: Weather Forecast
June 12
June 13
June 14
June 15
Location, Beaches & Local Information
Nearby Beaches & Facilities
South Lido Beach
North Lido Beach
Lido Beach
Siesta Beach
Longboat Key Beach - The Resort At Longboat Key Club
Quick Point Nature Preserve
Da Beach
Turtle Beach
Swimming Conditions
Swimming at Siesta Key is popular and accessible for a wide range of visitors thanks to shallow nearshore shelves and usually mild wave action on the Gulf side, which makes it suitable for families and casual swimmers during much of the year. The warmer months, when water temperatures are in the mid to high 20s °C and above, offer the most comfortable conditions for longer swims, snorkeling, paddleboarding and other water-based recreation. Even in cooler months many people still swim or wade, though shorter durations and wetsuits may be preferred by some. As with any coastal destination, swimmers should heed local advisories, pay attention to lifeguards, and be aware of changing conditions such as currents or transient marine life that can affect safety and enjoyment.