What is the current water temperature in Key West?

As of now, in Key West, the water temperature is 26.7°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.

80.1

°F

April 29, 09:16

Trend:

stable

Yesterday:

80.2°F

Tomorrow:

80.3°F

Sunrise:

06:54

Sunset:

19:56

Day Length:

13 h. 2 min.

Key West in May

Minimum:

69.6°F

Average:

74.7°F

Maximum:

77.3°F

Sea water temperature in Key West today

As of now, in Key West, the water temperature is 80.1°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. The sea temperature remains approximately unchanged from yesterday. According to the forecast, we expect the temperature to rise 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 83.2°F on 2023, while the historical minimum was 78.3°F on 2024.

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. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 80.7°F, with minimum temperature starting at 80.3°F, while the maximum might reach 81.5°F.

Daily water temperature in Key West

Date	Current Year actual* / forecast**	last year	10 years average
Apr 15	77.1°F	75.9°F	78.1°F
Apr 16	76.2°F	76.4°F	78.5°F
Apr 17	77.0°F	76.2°F	78.7°F
Apr 18	77.4°F	77.1°F	78.9°F
Apr 19	77.8°F	77.3°F	78.9°F
Apr 20	78.7°F	77.2°F	79.1°F
Apr 21	79.2°F	77.3°F	79.1°F
Apr 22	79.5°F	77.2°F	79.0°F
Apr 23	78.2°F	78.4°F	78.9°F
Apr 24	78.4°F	78.4°F	79.3°F
Apr 25	77.4°F	78.0°F	79.3°F
Apr 26	78.8°F	78.2°F	79.7°F
Apr 27	80.0°F	79.0°F	79.8°F
Apr 28	80.2°F	79.3°F	80.0°F
Apr 29	80.1°F	79.0°F	80.0°F
Apr 30	80.3°F	79.3°F	80.3°F
May 1	80.3°F	79.2°F	80.3°F
May 2	80.4°F	79.2°F	80.3°F
May 3	80.5°F	79.7°F	80.4°F
May 4	80.9°F	79.5°F	80.9°F
May 5	81.2°F	80.9°F	81.1°F
May 6	81.5°F	80.1°F	81.4°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 7, 2026, dipping to 64.1°F. The average readings by season are 74.0°F in Winter, 79.1°F in Spring, 86.4°F in Summer, and 82.9°F in Autumn.