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Florida Keys

Water Temperature in the Gulf of Mexico in Florida Keys, Florida: Current, Historical Data and Forecast

On this page, you will find comprehensive information about the sea temperature in Florida Keys in Florida, including current readings, historical data and trends, monthly averages, as well as weather forecasts and upcoming temperature predictions. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.

Current Water Temperature in Florida Keys

30.4°C

TODAY

29.8°C

YESTERDAY

29.1°C

A WEEK AGO

All water temperature data is now available in our official mobile apps — for iOS and Android.

Analysis, Historical Data, and Forecast of Water Temperature

Today sea water temperature in the Gulf of Mexico (Gulf of America) in Florida Keys is 30.4°C. This is very warm water, which may feel almost hot to most people. Swimming in such conditions is perfect for those seeking relaxation and comfort in the water. These waters are often preferred for relaxation in hot weather, as the water temperature does not cool the body significantly. However, it is important to remember that in such warm waters, caution is necessary, as prolonged exposure without rest can lead to overheating.

It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.

Water Temperature Chart for Gulf of Mexico (Gulf of America) in Florida Keys Over the Last 30 Days

The water temperature in Florida Keys today is lower than both a week ago and a month ago. Today's sea temperature is generally in line with historical values for this day.

According to our forecast, the sea temperature in Florida Keys will remain nearly unchanged in the coming days, its value will be 30.1°C.

Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.

Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts across United States to enhance accuracy.

Water temperature data for Florida Keys and nearby towns and resorts is gathered from various sources, including buoys and satellite sea and ocean surface maps provided by the NOAA agency. We also incorporate data from local authorities in each specific location worldwide to ensure more accurate temperature readings.

Table of Daily Sea Temperature Data

DateCurrentAverageForecast
Sep 1129.1°C30.8°C
Sep 1230.1°C30.0°C
Sep 1330.6°C30.0°C
Sep 1430.0°C30.3°C
Sep 1531.2°C29.8°C
Sep 1630.7°C29.5°C
Sep 1729.8°C30.0°C
Sep 1830.0°C30.5°C
Sep 1930.3°C30.4°C
Sep 2031.0°C30.5°C
Sep 2130.3°C30.5°C
Sep 2230.3°C30.5°C
Sep 2329.5°C30.3°C
Sep 2430.5°C30.3°C
Sep 2529.8°C30.2°C
Sep 2629.3°C30.1°C
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast

Sea Temperature in Florida Keys Throughout the Year

Throughout the year, the sea temperature in Florida Keys is always above 64°F (18°C), the sea temperature exceeds 72°F (22°C) for 335 days, and exceeds 77°F (25°C) for 227 days.

Below is the annual chart of sea temperature changes in the Gulf of Mexico (Gulf of America) in Florida Keys.

January

MinimumAverageMaximum
19°C22.5°C26°C

February

MinimumAverageMaximum
19°C23°C27°C

March

MinimumAverageMaximum
20°C24.5°C29°C

April

MinimumAverageMaximum
23°C26°C29°C

May

MinimumAverageMaximum
24°C28°C32°C

June

MinimumAverageMaximum
27°C29.5°C32°C

July

MinimumAverageMaximum
27°C30.5°C34°C

August

MinimumAverageMaximum
28°C31°C34°C

September

MinimumAverageMaximum
27°C30°C33°C

October

MinimumAverageMaximum
24°C27.5°C31°C

November

MinimumAverageMaximum
21°C24.5°C28°C

December

MinimumAverageMaximum
20°C23.5°C27°C

Monthly Water Temperature Histogram for Gulf of Mexico (Gulf of America) in Florida Keys

You can explore detailed data on how the water temperature in Florida Keys varies each month:

Florida Keys Weather

SEPTEMBER 19

27°C / 30°C
few clouds: 11-25%

humidity: 71% | wind: 2 km/h

SEPTEMBER 20

28°C / 29°C
clear sky

humidity: 70% | wind: 3 km/h

SEPTEMBER 21

28°C / 29°C
scattered clouds: 25-50%

humidity: 65% | wind: 2 km/h

SEPTEMBER 22

29°C / 29°C
clear sky

humidity: 62% | wind: 1 km/h

Florida, United StatesFlorida, United StatesFlorida, United States

Sea Temperature in the Gulf of Mexico (Gulf of America) in Florida Keys: General Trends and Swimming Opportunities

Original name
Florida Keys
The Local Time
16:47
Time Zone
UTC-4
Sunrise
07:09
Sunset
19:24
Length of the day
12 h 15 m

The coastal region of Florida, United States, features a tropical climate with hot, humid summers and mild, drier winters. Rainfall is significant in the summer, with occasional hurricanes, while the winter months are drier and sunnier.

Florida Keys is located in North America in the Northern Hemisphere at a latitude of 25 degrees, along the shores of the Gulf of Mexico. Florida Keys lies within the Florida in United States.

The average annual daytime air temperature in Florida Keys is 82°F (28°C), with the average nighttime temperature being 70°F (21°C). The highest average daily temperature occurs in August, reaching 90°F (32°C), while the lowest is in January at 74°F (23°C). As for nighttime temperatures, the minimum average temperature of 61°F (16°C) is recorded in January, and the maximum is in July, reaching 77°F (25°C).

According to historical data, Florida Keys experiences 122 rainy days per year, which accounts for 33 percent of all days in the year. On average, there are 10 rainy days each month. The wettest month is August, with 16 rainy days and 6.4 inches (163 mm) of precipitation, while the driest month is April, which typically has 6 rainy days and only 2.4 inches (62 mm) of precipitation.

The average annual water temperature in Gulf of Mexico in Florida Keys is 81°F (27°C). In January, the water reaches its lowest point of the year at 66°F (19°C), while in July, it peaks at 93°F (34°C). The months suitable for comfortable beach vacations and swimming in the Gulf of Mexico are April, May, June, July, August, September, October, and November. During this period, the water temperature stays above 68°F (20°C) and can reach up to 93°F (34°C) on some days.

Geographical Location of Florida Keys

Frequently Asked Questions About Florida Keys and its Water Temperatures

What is the current sea temperature in Florida Keys?

The water temperature today in the Gulf of Mexico (Gulf of America) in Florida Keys is 87°F (30.4°C).

In which months is the water temperature in Florida Keys comfortable for swimming?

The water temperature in the Gulf of Mexico in Florida Keys is comfortable for swimming and beach vacations in April, May, June, July, August, September, October, and November.

What is the water temperature in Florida Keys during the winter?

The water temperature in the Gulf of Mexico in Florida Keys during the winter ranges from 66°F to 81°F (19°C to 27°C).

What is the water temperature in Florida Keys during the spring?

The water temperature in the Gulf of Mexico in Florida Keys during the spring ranges from 68°F to 90°F (20°C to 32°C).

What is the water temperature in Florida Keys during the summer?

The water temperature in the Gulf of Mexico in Florida Keys during the summer ranges from 81°F to 93°F (27°C to 34°C).

What is the water temperature in Florida Keys during the fall?

The water temperature in the Gulf of Mexico in Florida Keys during the fall ranges from 70°F to 91°F (21°C to 33°C).

Is it possible to swim in the sea in Florida Keys year-round?

No, it is not possible to swim in the Gulf of Mexico in Florida Keys year-round, the months suitable for comfortable swimming are April, May, June, July, August, September, October, and November.

Is Florida Keys a popular tourist destination for beach vacations?

Florida Keys a fairly popular beach destination, offering good conditions for swimming and relaxation, with a steady flow of tourists, especially during peak seasons.

What sea temperatures can I expect in Florida Keys in the next month?

In October, the water temperature in the Gulf of Mexico (Gulf of America) in Florida Keys will range between 75°F (24°C) and 88°F (31°C)