World sea water temperatures

Water temperature in Florida Keys (FL) in October

Is it warm enough to swim in Florida Keys in October? Average water temperature in Florida Keys in October is 83.1°F and therefore suitable for comfortable swimming. The warmest sea in Florida Keys in October is 86.5°F, and the coldest is 78.8°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Florida Keys

Changes water temperature in Florida Keys in October 2025, 2024

To get an accurate forecast for the water temperature in Florida Keys for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Florida Keys, the selected years in the table also show the values of the maximum and minimum temperatures on each of the days of October.

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024 Min Max
October 186.2°F86°F83.1°F86.2°F
October 286.2°F86.2°F82.8°F86.5°F
October 385.8°F86.5°F82.9°F86.5°F
October 485.6°F86.4°F82.9°F86.4°F
October 585.3°F86.4°F82.6°F86.4°F
October 684.9°F85.6°F82.2°F85.8°F
October 785.5°F85.3°F82.2°F86°F
October 885.5°F84.6°F82°F86°F
October 985.3°F84.6°F81.7°F85.8°F
October 1085.3°F84.2°F81.9°F85.8°F
October 1183.8°F83.8°F82.2°F86.2°F
October 12 83.7°F82°F85.5°F
October 13 83.5°F81.9°F86°F
October 14 83.1°F81.5°F86.2°F
October 15 83.1°F81.1°F85.6°F
Day 2025 2024 Min Max
October 16 83.5°F81.1°F85.6°F
October 17 83.1°F81.3°F85.1°F
October 18 82.9°F81.3°F84.4°F
October 19 82.4°F81.1°F84°F
October 20 82°F80.6°F84.9°F
October 21 81.9°F80.2°F84.9°F
October 22 81.1°F80.2°F84.6°F
October 23 81.5°F80.2°F84.7°F
October 24 81.7°F80.2°F84.9°F
October 25 82.2°F79.9°F84.4°F
October 26 82°F79.5°F84.4°F
October 27 81.9°F79.3°F83.5°F
October 28 81.7°F79.7°F84°F
October 29 80.2°F79.2°F84.2°F
October 30 81°F78.8°F84°F
October 31 81.1°F78.8°F84.4°F
Florida Keys water temp chart in October

Average water temperature in Florida Keys in October over a decade

20152016201720182019
82.8°F82.8°F83.3°F83.3°F84°F
20202021202220232024
84°F84°F82.4°F84°F83.3°F

Florida Keys sea state in October

Chart comparing the height of waves in Florida Keys in October over the past years. The red line indicates the height of the waves when swimming in the sea is prohibited. To view the current sea conditions, click on the graph.

Waves height in Florida Keys in October

Florida Keys water temperature during other months:

You can also view information about water temperature for other months by clicking on the month button below

Where is the warm sea water in October?

Want to know where the water temperature in October is good for swimming? Select the continent of interest, the day of the month and the required water temperature

Region
Date (day and month)
Water temperature: min 60°F
 Average temperature  Maximum temperature

Temperature in neighboring cities

The nearest locations with the average water temperature in October. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

AvrMinMax
Summerland Key83.1°F78.8°F86.5°F
Cudjoe Key83.1°F78.6°F86.7°F
Ramrod Key83.1°F78.8°F86.5°F
Little Torch Key83.1°F78.8°F86.5°F
Big Pine Key83.1°F78.8°F86.5°F
Sugarloaf Key83.1°F78.6°F86.7°F
Looe Key83.5°F79.2°F86.5°F
Bahia Honda83.3°F78.8°F86.5°F
Big Coppitt Key82.9°F78.3°F87.1°F
Geiger Beach83.3°F78.8°F86.7°F

Florida Gulf Coast photo gallery

  • Sunset
  • The beautiful water and scenery at Caspersian Beach
  • Blackwater Bay older structure some type of inlet
  • Blackwater Bay nightfall.

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[1] - The "Blue Flag" is awarded to beaches which fulfill a number of criteria, including: the quality of the bathing water, which must be in accordance with the relevant European Union Directive environmental education and information and beach area management and safety.

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Our report for Florida 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.

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