Water temperature in Key West
86.9
°F
September 15, 15:48
Trend:
increasingYesterday:
86.9°FTomorrow:
87.1°F
Sunrise:
Sunset:
Day Length:
12 h. 18 min.Key West in September
Minimum:
71.4°FAverage:
73.9°FMaximum:
76.2°FSea water temperature in Key West today
As of now, in Key West, the water temperature is 86.9°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 0.5°F higher 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 rise a bit.Recent sea temperature and forecast
Today's water temperature is slightly lower than the average registered over the last two weeks, indicating a slight cooling 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 88.8°F on 2024, while the historical minimum was 85.0°F on 2016.
Daily water temperature in Key West
| Date |
Current Year
actual* / forecast** |
last year | 10 years average |
|---|---|---|---|
| Sep 1 | 89.2°F | 86.5°F | 86.7°F |
| Sep 2 | 88.2°F | 86.3°F | 86.6°F |
| Sep 3 | 88.5°F | 86.1°F | 86.6°F |
| Sep 4 | 88.3°F | 86.7°F | 86.6°F |
| Sep 5 | 87.8°F | 87.2°F | 86.5°F |
| Sep 6 | 87.2°F | 87.3°F | 86.6°F |
| Sep 7 | 85.4°F | 87.4°F | 86.3°F |
| Sep 8 | 85.3°F | 88.0°F | 86.5°F |
| Sep 9 | 86.6°F | 87.6°F | 86.7°F |
| Sep 10 | 86.7°F | 87.3°F | 86.7°F |
| Sep 11 | 86.6°F | 88.1°F | 86.5°F |
| Sep 12 | 87.2°F | 89.0°F | 86.7°F |
| Sep 13 | 86.8°F | 88.3°F | 86.4°F |
| Sep 14 | 86.9°F | 88.4°F | 86.5°F |
| Sep 15 | 86.9°F | 88.8°F | 86.4°F |
| Sep 16 | 87.1°F | 89.6°F | 86.6°F |
| Sep 17 | 87.0°F | 89.6°F | 86.5°F |
| Sep 18 | 87.0°F | 88.5°F | 86.5°F |
| Sep 19 | 87.0°F | 88.1°F | 86.5°F |
| Sep 20 | 87.0°F | 87.8°F | 86.4°F |
| Sep 21 | 87.0°F | 87.7°F | 86.5°F |
| Sep 22 | 87.0°F | 88.3°F | 86.5°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.