World sea water temperatures

Water temperature in Long Key (FL) in April

Is it warm enough to swim in Long Key in April? Average water temperature in Long Key in April is 78.6°F and therefore suitable for comfortable swimming. The warmest sea in Long Key in April is 82.9°F, and the coldest is 74.3°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Long Key

Changes water temperature in Long Key in April 2025, 2024

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

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024 Min Max
April 178.4°F76.3°F74.3°F79.2°F
April 279.3°F77°F74.3°F79.9°F
April 379.7°F77.5°F75.2°F80.1°F
April 479.7°F77.9°F74.8°F80.4°F
April 579.3°F77°F74.5°F80.4°F
April 679.7°F77.2°F74.5°F80.1°F
April 779.5°F77.2°F74.3°F79.7°F
April 879.3°F77.2°F75.2°F79.9°F
April 979.2°F77.2°F76.1°F79.9°F
April 1079°F77.2°F75.9°F80.1°F
April 1178.8°F76.5°F76.5°F80.6°F
April 1278.4°F77.4°F76.8°F80.6°F
April 1377.7°F77.2°F76.1°F81°F
April 1478.3°F76.8°F76.5°F81°F
April 1578.3°F76.8°F75.9°F81.9°F
Day 2025 2024 Min Max
April 1677.9°F77°F76.5°F82.2°F
April 1777.7°F77.5°F75.9°F82.6°F
April 1878.1°F77.7°F76.3°F82.6°F
April 1978.3°F77.9°F75.9°F82.4°F
April 2078.4°F78.3°F76.3°F82.8°F
April 2178.4°F78.4°F76.8°F82°F
April 2278.4°F78.8°F76.3°F82.9°F
April 2378.8°F79.3°F76.6°F82.8°F
April 2478.8°F79.3°F76.6°F82.2°F
April 2579.2°F79.7°F76.6°F82.4°F
April 2679.2°F79.7°F77.2°F82.9°F
April 2779.7°F79.5°F77°F82.9°F
April 2879.3°F79.5°F77°F82.9°F
April 2979.9°F79.2°F77.4°F81.7°F
April 3079.9°F79.5°F77.5°F81.7°F
Long Key water temp chart in April

Average water temperature in Long Key in April over a decade

20162017201820192020
78.4°F78.4°F78.8°F79°F80.8°F
20212022202320242025
78.4°F79.2°F80.1°F77.9°F78.8°F

Long Key sea state in April

Chart comparing the height of waves in Long Key in April 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 Long Key in April

Long Key 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 April?

Want to know where the water temperature in April 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 April. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

AvrMinMax
Fiesta Key78.6°F73.9°F83.7°F
Grassy Key78.6°F74.1°F83.3°F
Vaca Key78.6°F73.6°F84°F
Cocoa Plum Beach78.6°F73.6°F84°F
Key Colony Beach78.6°F73.9°F83.3°F
Sombrero Beach78.6°F73.8°F83.7°F
Murray Key78.8°F72.1°F85.8°F
Flamingo79°F72.1°F86°F
Rodriguez Key78.6°F74.5°F83.1°F
Bahia Honda78.6°F73.8°F83.8°F

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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 Long Key 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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