Marquesas Keys water temp

This data the coastal Marquesas Keys 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 Marquesas Keys

Water temperature in Marquesas Keys today is 86.2°F. Based on our historical data over a period of ten years, the warmest water in this day in the Gulf of Mexico near Marquesas Keys was recorded in 2022 and was 87.1°F, and the coldest was recorded in 2012 at 83.1°F. Sea water temperature in Marquesas Keys is expected to drop to 84.2°F in the next 10 days. September average water temperature in Marquesas Keys is 85.8°F, the minimum temperature is 83.1°F, and the maximum is 89.2°F.

The swimming season in Marquesas Keys lasts from January to December, twelve months per year! During those months, Marquesas Keys water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Marquesas Keys in winter reaches 74.3°F, in spring 78.3°F, in summer the average temperature rises to 85.8°F, and in autumn it is 82.6°F.

Marquesas Keys water temperature now

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

Surf Forecast in Marquesas Keys 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 Marquesas Keys. 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 Marquesas Keys. 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 Marquesas Keys

Marquesas Keys weather forecast

Current temperature and weather

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

0-3 h	3-6 h	6-9 h	9-12 h
82.9°F	82.4°F	82.4°F	82.6°F

12-15 h	15-18 h	18-21 h	21-24 h
82.6°F	83.8°F	83.7°F	83.3°F

Marquesas Keys water temperature by month

These figures shows the average, minimum and maximum monthly sea temperature in Marquesas Keys. 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 Marquesas Keys 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 Marquesas Keys

The nearest beaches and cities from Marquesas Keys 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
Smathers Beach	86°F	84.2°F		0' 7"
Big Coppitt Key	86.5°F	84.2°F		0' 6"
Geiger Beach	86.2°F	84.2°F		0' 7"
Sugarloaf Key	86.5°F	86°F		0' 7"
Cudjoe Key	86.4°F	86°F		0' 7"
Florida Keys	86.2°F	84.2°F		0' 7"
Summerland Key	86.2°F	84.2°F		0' 7"
Ramrod Key	86°F	84.2°F		0' 7"
Little Torch Key	86°F	84.2°F		0' 7"
Looe Key	85.8°F	84.2°F		0' 8"

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Our report for Marquesas Keys 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.