What is the current water temperature in Key West?

As of now, in Key West, the water temperature is 25.46°F. It's safe to say that the water is comfortably warm for various water-related activities.

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.

77.8

°F

November 27, 15:47

Trend:

stable

Yesterday:

77.4°F

Tomorrow:

77.6°F

Sunrise:

06:51

Sunset:

17:38

Day Length:

10 h. 47 min.

Key West in December

Minimum:

68.5°F

Average:

73.0°F

Maximum:

75.6°F

Sea water temperature in Key West today

As of now, in Key West, the water temperature is 77.8°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is about the same as the average recorded on this particular day in recent years. Since yesterday, there was a slight increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to fall a bit.

Recent sea temperature and forecast

Today's water temperature is notably higher than the average recorded over the past two weeks, indicating a significant warming trend. 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 80.3°F on 2022, while the historical minimum was 74.7°F on 2021.

latest data

last year

Observations from the last two weeks indicate that the water temperature was in proximity to the lowest values recorded on those days in the past. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 77.4°F, the minimum temperature may reach 77.2°F, and the maximum might stay at 77.6°F.

Daily water temperature in Key West

Date	Current Year actual* / forecast**	last year	10 years average
Nov 13	79.9°F	79.9°F	80.1°F
Nov 14	78.4°F	79.6°F	79.9°F
Nov 15	77.0°F	80.3°F	79.9°F
Nov 16	75.3°F	80.2°F	79.7°F
Nov 17	74.8°F	79.1°F	79.4°F
Nov 18	75.5°F	79.4°F	79.1°F
Nov 19	76.4°F	78.9°F	78.9°F
Nov 20	76.8°F	78.7°F	78.5°F
Nov 21	76.6°F	78.6°F	78.4°F
Nov 22	76.9°F	77.0°F	78.0°F
Nov 23	77.0°F	77.3°F	78.0°F
Nov 24	77.2°F	75.8°F	78.0°F
Nov 25	77.5°F	75.4°F	77.8°F
Nov 26	77.4°F	74.2°F	77.6°F
Nov 27	77.8°F	74.7°F	77.7°F
Nov 28	77.6°F	75.2°F	77.5°F
Nov 29	77.6°F	75.6°F	77.5°F
Nov 30	77.6°F	76.0°F	77.5°F
Dec 1	77.3°F	75.8°F	77.2°F
Dec 2	77.2°F	74.5°F	77.1°F
Dec 3	77.3°F	74.1°F	77.1°F
Dec 4	77.2°F	73.7°F	77.1°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.