What is the current water temperature in Key West?

Q: What is the current water temperature in Key West?

As of now, in Key West, the water temperature is 30.35°F. Swimming in water of this temperature is considered highly warm and would be enjoyable for everyone. At this temperature, you can comfortably engage in water-based activities for extended periods without experiencing discomfort.

United States > Key West

Water temperature in Key West

Detailed information about the current water temperature in Key West. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.

86.6

°F

July 14, 04:36

Trend:

stable

Yesterday:

86.9°F

Tomorrow:

86.6°F

Sunrise:

06:47

Sunset:

20:19

Day Length:

13 h. 32 min.

Key West in July

Minimum:

70.4°F

Average:

74.2°F

Maximum:

76.4°F

Sea water temperature in Key West today

As of now, in Key West, the water temperature is 86.6°F. Swimming in water of this temperature is considered highly warm and would be enjoyable for everyone. At this temperature, you can comfortably engage in water-based activities for extended periods without experiencing discomfort. Today's reading is 0.2°F lower than the average recorded on this particular day in recent years. The sea temperature remains approximately unchanged from yesterday. According to the forecast, we expect the temperature to stay about the same.

Recent sea temperature and forecast

The water temperature today is above average for the last two weeks, showing a small increase in temperature. It also falls within the range of the average temperature recorded for this date, suggesting a consistent weather trend. The maximum temperature recorded for this date was 89.7°F on 2023, while the historical minimum was 83.9°F on 2021.

latest data

last year

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the minimum recorded over the past years. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 86.8°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Key West

Date	Current Year actual* / forecast**	last year	10 years average
Jun 30	85.2°F	85.6°F	86.1°F
Jul 1	85.6°F	85.9°F	86.1°F
Jul 2	85.4°F	85.7°F	86.4°F
Jul 3	85.1°F	87.4°F	86.5°F
Jul 4	85.4°F	87.2°F	86.8°F
Jul 5	85.6°F	87.0°F	86.8°F
Jul 6	86.1°F	86.3°F	86.9°F
Jul 7	85.6°F	87.8°F	86.9°F
Jul 8	86.3°F	87.4°F	86.8°F
Jul 9	86.6°F	87.1°F	86.9°F
Jul 10	86.3°F	87.9°F	87.0°F
Jul 11	86.1°F	87.3°F	86.9°F
Jul 12	86.7°F	86.7°F	87.0°F
Jul 13	86.9°F	86.9°F	86.8°F
Jul 14	86.6°F	87.4°F	86.8°F
Jul 15	86.6°F	87.1°F	86.8°F
Jul 16	86.9°F	87.3°F	87.1°F
Jul 17	86.8°F	88.5°F	87.0°F
Jul 18	86.9°F	88.1°F	87.1°F
Jul 19	86.9°F	88.3°F	87.1°F
Jul 20	86.8°F	89.1°F	87.0°F
Jul 21	87.0°F	88.1°F	87.2°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Sea water temperature in Key West by month

In Key West, almost every month besides January is comfortable for swimming. Which amounts to 333 swimming days.

The warmest water in Key West was recorded on August 12, 2023, reaching a 91.4°F. While the coldest temperature occurred on January 26, 2025, dipping to 66.0°F. The average readings by season are 74.2°F in Winter, 79.1°F in Spring, 86.4°F in Summer, and 82.9°F in Autumn.