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 21.96°F. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool.

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.

71.5

°F

January 21, 19:23

Trend:

increasing

Yesterday:

71.3°F

Tomorrow:

71.6°F

Sunrise:

07:13

Sunset:

18:05

Day Length:

10 h. 52 min.

Key West in January

Minimum:

69.2°F

Average:

75.0°F

Maximum:

78.1°F

Sea water temperature in Key West today

As of now, in Key West, the water temperature is 71.5°F. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool. Today's reading is 1.3°F lower than 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 stay about the same.

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 74.8°F on 2017, while the historical minimum was 69.2°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. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 71.6°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
Jan 7	71.7°F	72.1°F	74.2°F
Jan 8	72.1°F	73.0°F	74.3°F
Jan 9	71.4°F	72.4°F	73.9°F
Jan 10	69.4°F	71.6°F	73.5°F
Jan 11	68.5°F	71.9°F	73.1°F
Jan 12	68.5°F	72.1°F	73.0°F
Jan 13	67.7°F	74.2°F	73.1°F
Jan 14	69.0°F	74.0°F	73.3°F
Jan 15	69.5°F	74.2°F	73.1°F
Jan 16	69.3°F	74.4°F	72.7°F
Jan 17	69.1°F	75.0°F	72.7°F
Jan 18	69.6°F	74.9°F	72.8°F
Jan 19	70.1°F	73.0°F	72.3°F
Jan 20	71.3°F	72.7°F	72.4°F
Jan 21	71.5°F	72.8°F	72.8°F
Jan 22	71.6°F	72.2°F	72.8°F
Jan 23	71.8°F	72.4°F	73.1°F
Jan 24	71.7°F	72.3°F	73.0°F
Jan 25	71.7°F	73.4°F	73.0°F
Jan 26	71.6°F	73.1°F	72.9°F
Jan 27	71.5°F	73.8°F	72.7°F
Jan 28	71.4°F	74.0°F	72.7°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 332 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 February 4, 2021, dipping to 67.5°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.