This data the coastal Marco Island 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 Marco Island today is 87.4°F. Based on our historical data over a period of ten years, the warmest water in this day in the Gulf of Mexico near Marco Island was recorded in 2022 and was 88.7°F, and the coldest was recorded in 2008 at 84.2°F. Sea water temperature in Marco Island is expected to drop to 86°F in the next 10 days. September average water temperature in Marco Island is 85.8°F, the minimum temperature is 81.9°F, and the maximum is 88.9°F.
The swimming season in Marco Island lasts from January to December, twelve months per year! During those months, Marco Island water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Marco Island in winter reaches 70°F, in spring 77.2°F, in summer the average temperature rises to 86.4°F, and in autumn it is 81.1°F.
September 5, 2025 |
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today temp |
87.4°F |
September 4, 2025 |
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yesterday temp |
87.6°F |
The ocean salinity in Marco Island is 36.02‰, and the average salinity of the World Ocean is 35‰.
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 Marco Island. 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 Marco Island. 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 |
---|---|---|---|
1' 5" | 1' 5" | 1' 6" | 1' 7" |
0.44 m | 0.43 m | 0.46 m | 0.49 m |
12-15 h | 15-18 h | 18-21 h | 21-24 h |
---|---|---|---|
1' 7" | 1' 7" | 1' 6" | 1' 5" |
0.49 m | 0.48 m | 0.45 m | 0.43 m |
Data in a table show Marco Island temperature today (September 5, 2025). For more information and forecast for a few days, go to the weather forecast Marco Island.
0-3 h | 3-6 h | 6-9 h | 9-12 h |
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81.9°F | 82°F | 82.2°F | 83.5°F |
12-15 h | 15-18 h | 18-21 h | 21-24 h |
---|---|---|---|
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84.9°F | 84.7°F | 83.8°F | 82.8°F |
You may also be interested in other sections of our site for Marco Island: Sunrise and Sunset, Tides
These figures shows the average, minimum and maximum monthly sea temperature in Marco Island. 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 Marco Island 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 | 68.7°F | 61.2°F | 76.5°F | warm |
Ocean water temperature in Marco Island in January | ||||
February | 69.6°F | 62.8°F | 78.3°F | warm |
Ocean water temperature in Marco Island in February | ||||
March | 72.7°F | 63.1°F | 80.4°F | warm |
Ocean water temperature in Marco Island in March | ||||
April | 77.4°F | 68°F | 84°F | hot |
Ocean water temperature in Marco Island in April | ||||
May | 81.5°F | 76.5°F | 87.8°F | hot |
Ocean water temperature in Marco Island in May | ||||
June | 85.3°F | 78.8°F | 88.7°F | hot |
Ocean water temperature in Marco Island in June | ||||
July | 86.7°F | 83.5°F | 90.5°F | hot |
Ocean water temperature in Marco Island in July | ||||
August | 87.1°F | 83.8°F | 90.7°F | hot |
Ocean water temperature in Marco Island in August | ||||
September | 85.8°F | 81.9°F | 88.9°F | hot |
Ocean water temperature in Marco Island in September | ||||
October | 81.9°F | 74.8°F | 87.1°F | hot |
Ocean water temperature in Marco Island in October | ||||
November | 75.6°F | 69.4°F | 84°F | warm |
Ocean water temperature in Marco Island in November | ||||
December | 71.4°F | 64.2°F | 78.3°F | warm |
Ocean water temperature in Marco Island in December |