Siesta Key water temp

This data the coastal Siesta Key ocean water temperature today, tomorrow and the upcoming days. Besides, you can also get information about the weather and surf forecast, as well as the data on sunrise / sunset and moonrise / moonset at a given point on any given day.

Current ocean temperature in Siesta Key

Water temperature in Siesta Key today is 84°F. Based on our historical data over a period of ten years, the warmest water in this day in the Gulf of Mexico near Siesta Key was recorded in 2009 and was 86.5°F, and the coldest was recorded in 2012 at 82.2°F. Sea water temperature in Siesta Key is expected to drop to 82.6°F in the next 10 days. September average water temperature in Siesta Key is 85.5°F, the minimum temperature is 81.9°F, and the maximum is 88.3°F.

The swimming season in Siesta Key lasts from February to December. During those months, Siesta Key water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Siesta Key in winter reaches 66.7°F, in spring 74.5°F, in summer the average temperature rises to 85.8°F, and in autumn it is 80.1°F.

Siesta Key water temperature now

The ocean salinity in Siesta Key is 36.33‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Siesta Key for today

Another important indicators for a comfortable holiday on the beach are the presence and height of the waves, as well as the speed and direction of the wind. Please find below data on the swell size for Siesta Key. We calculate the swell size based on the mean wave height (trough to crest) of each third highest wave. For more information on surf forecasts for the next ten days, please visit sea state forecast Siesta Key. Data in table shown for September 26, 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Siesta Key

Siesta Key weather forecast

Current temperature and weather

Data in a table show Siesta Key temperature today (September 26, 2025). For more information and forecast for a few days, go to the weather forecast Siesta Key.

0-3 h	3-6 h	6-9 h	9-12 h
79°F	76.3°F	74.8°F	79.9°F

12-15 h	15-18 h	18-21 h	21-24 h
86.7°F	86.7°F	83.8°F	81.5°F

Siesta Key water temperature by month

These figures shows the average, minimum and maximum monthly sea temperature in Siesta Key. In addition to the table values, the graph below displays of changes average surface temperature during the year. Values are calculated based on the data over the past 10 years. Using them, you can check the water temperature in Siesta Key on any day of this period that interests you. Click on the month link and you will see a table for each day, or alternatively you can view the temperature curve of the month and select 2 different years you want to compare, either in a table or as a curve

Chart monthly average water temperature in Siesta Key

The nearest beaches and cities from Siesta Key with the water temperature today, as well as the air temperature and the state of the weather during the day and the average wave height for today

	Water	Weather		Wave
Gulf Gate Estates	84°F	86°F		0' 4"
Osprey	84°F	86°F		0' 4"
Vamo	84°F	86°F		0' 4"
Turtle Beach	84°F	86°F		0' 4"
Casey Key	84.2°F	87.8°F		0' 4"
Lido Key	84.2°F	86°F		0' 5"
Nokomis	84.4°F	87.8°F		0' 4"
Venice Beach	84.4°F	87.8°F		0' 4"
Laurel	84.4°F	87.8°F		0' 4"
Whitfield	84.7°F	89.6°F		0' 5"

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Siesta Beach, Siesta Key Beach

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Our report for Siesta Key is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.