This data the coastal Sand Key Beach 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.
Water temperature in Sand Key Beach today is 84.6°F. Based on our historical data over a period of ten years, the warmest water in this day in the Gulf of Mexico near Sand Key Beach was recorded in 2007 and was 87.1°F, and the coldest was recorded in 2016 at 83.5°F. Sea water temperature in Sand Key Beach is expected to rise to 85.1°F in the next 10 days. September average water temperature in Sand Key Beach is 84.9°F, the minimum temperature is 80.8°F, and the maximum is 88°F.
The swimming season in Sand Key Beach lasts from March to December. During those months, Sand Key Beach water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Sand Key Beach in winter reaches 64.8°F, in spring 73.9°F, in summer the average temperature rises to 85.8°F, and in autumn it is 79°F.
September 5, 2025 |
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today temp |
84.6°F |
September 4, 2025 |
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yesterday temp |
84.9°F |
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 Sand Key Beach. 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 Sand Key Beach. Data in table shown for September 5, 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)
0-3 h | 3-6 h | 6-9 h | 9-12 h |
---|---|---|---|
0' 7" | 0' 9" | 0' 10" | 0' 10" |
0.19 m | 0.24 m | 0.25 m | 0.26 m |
12-15 h | 15-18 h | 18-21 h | 21-24 h |
---|---|---|---|
0' 11" | 0' 11" | 0' 11" | 0' 10" |
0.28 m | 0.28 m | 0.27 m | 0.26 m |
Data in a table show Sand Key Beach temperature today (September 5, 2025). For more information and forecast for a few days, go to the weather forecast Sand Key Beach.
0-3 h | 3-6 h | 6-9 h | 9-12 h |
---|---|---|---|
![]() | ![]() | ![]() | ![]() |
81.3°F | 79.9°F | 78.6°F | 79.2°F |
12-15 h | 15-18 h | 18-21 h | 21-24 h |
---|---|---|---|
![]() | ![]() | ![]() | ![]() |
84°F | 88.3°F | 86.4°F | 81.9°F |
You may also be interested in other sections of our site for Sand Key Beach: Sunrise and Sunset
These figures shows the average, minimum and maximum monthly sea temperature in Sand Key Beach. 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 Sand Key Beach 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
Month | Avr | Min | Max | |
---|---|---|---|---|
January | 63.3°F | 51.6°F | 72.1°F | cold |
Ocean water temperature in Sand Key Beach in January | ||||
February | 64.2°F | 57.4°F | 75.6°F | cold |
Ocean water temperature in Sand Key Beach in February | ||||
March | 68.2°F | 57.4°F | 79.5°F | warm |
Ocean water temperature in Sand Key Beach in March | ||||
April | 73.9°F | 63.7°F | 79.7°F | warm |
Ocean water temperature in Sand Key Beach in April | ||||
May | 79.5°F | 73°F | 86.7°F | hot |
Ocean water temperature in Sand Key Beach in May | ||||
June | 84.2°F | 76.8°F | 88.5°F | hot |
Ocean water temperature in Sand Key Beach in June | ||||
July | 86.4°F | 83.5°F | 89.2°F | hot |
Ocean water temperature in Sand Key Beach in July | ||||
August | 86.7°F | 83.5°F | 91.6°F | hot |
Ocean water temperature in Sand Key Beach in August | ||||
September | 84.9°F | 80.8°F | 88°F | hot |
Ocean water temperature in Sand Key Beach in September | ||||
October | 79.7°F | 68.9°F | 86.7°F | hot |
Ocean water temperature in Sand Key Beach in October | ||||
November | 72.3°F | 64.4°F | 81.3°F | warm |
Ocean water temperature in Sand Key Beach in November | ||||
December | 66.9°F | 56.1°F | 72.7°F | cold |
Ocean water temperature in Sand Key Beach in December |