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 87.3°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 2009 and was 88.3°F, and the coldest was recorded in 2008 at 84.6°F. Sea water temperature in Marquesas Keys is expected to drop to 86°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
| September 5, 2025 |
|---|
| today temp |
| 87.3°F |
| September 4, 2025 |
|---|
| yesterday temp |
| 87.8°F |
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 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 |
|---|---|---|---|
| 2' 7" | 2' 9" | 3' 0" | 3' 0" |
| 0.79 m | 0.83 m | 0.92 m | 0.91 m |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| 3' 0" | 2' 10" | 2' 7" | 2' 6" |
| 0.91 m | 0.87 m | 0.78 m | 0.75 m |
Surf report in Marquesas Keys
Marquesas Keys weather forecast
Current temperature and weather
Data in a table show Marquesas Keys temperature today (September 5, 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 |
|---|---|---|---|
 |  | |  |
| 81°F | 82°F | 82.9°F | 83.1°F |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| | |  |
| 83.8°F | 83.8°F | 82.4°F | 81.9°F |
You may also be interested in other sections of our site for Marquesas Keys: Sunrise and Sunset, Tides
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
| Month | Avr | Min | Max | |
|---|---|---|---|---|
| January | 73.6°F | 67.3°F | 79.2°F | warm |
| Ocean water temperature in Marquesas Keys in January | ||||
| February | 73.6°F | 67.6°F | 79°F | warm |
| Ocean water temperature in Marquesas Keys in February | ||||
| March | 75.4°F | 68.9°F | 80.4°F | warm |
| Ocean water temperature in Marquesas Keys in March | ||||
| April | 78.1°F | 72.3°F | 83.1°F | hot |
| Ocean water temperature in Marquesas Keys in April | ||||
| May | 81.3°F | 76.8°F | 89.4°F | hot |
| Ocean water temperature in Marquesas Keys in May | ||||
| June | 84.2°F | 79.3°F | 88°F | hot |
| Ocean water temperature in Marquesas Keys in June | ||||
| July | 86.2°F | 82.9°F | 90.7°F | hot |
| Ocean water temperature in Marquesas Keys in July | ||||
| August | 86.9°F | 83.3°F | 91.6°F | hot |
| Ocean water temperature in Marquesas Keys in August | ||||
| September | 85.8°F | 83.1°F | 89.2°F | hot |
| Ocean water temperature in Marquesas Keys in September | ||||
| October | 83.1°F | 78.6°F | 86.7°F | hot |
| Ocean water temperature in Marquesas Keys in October | ||||
| November | 79°F | 74.7°F | 84°F | hot |
| Ocean water temperature in Marquesas Keys in November | ||||
| December | 75.9°F | 70.7°F | 80.8°F | warm |
| Ocean water temperature in Marquesas Keys in December | ||||
Chart monthly average water temperature in Marquesas Keys
