Water temperature in San Juan
57.2
°F
October 10, 15:51
Trend:
stableYesterday:
57.1°FTomorrow:
57.1°F
Sunrise:
Sunset:
Day Length:
12 h. 22 min.San Juan in October
Minimum:
60.9°FAverage:
66.1°FMaximum:
69.4°FSea water temperature in San Juan today
As of now, in San Juan, the water temperature is 57.2°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is 1.0°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
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 61.4°F on 2018, while the historical minimum was 54.6°F on 2022.
Daily water temperature in San Juan
| Date |
Current Year
actual* / forecast** |
last year | 10 years average |
|---|---|---|---|
| Sep 26 | 57.9°F | 58.2°F | 58.4°F |
| Sep 27 | 58.6°F | 57.1°F | 58.5°F |
| Sep 28 | 58.3°F | 57.6°F | 58.6°F |
| Sep 29 | 58.7°F | 55.7°F | 58.1°F |
| Sep 30 | 58.2°F | 55.6°F | 58.1°F |
| Oct 1 | 57.1°F | 56.2°F | 58.2°F |
| Oct 2 | 56.4°F | 56.8°F | 58.2°F |
| Oct 3 | 58.0°F | 56.5°F | 58.4°F |
| Oct 4 | 58.5°F | 56.9°F | 58.2°F |
| Oct 5 | 58.7°F | 57.4°F | 58.5°F |
| Oct 6 | 58.9°F | 57.8°F | 58.3°F |
| Oct 7 | 59.0°F | 58.0°F | 58.4°F |
| Oct 8 | 57.0°F | 58.4°F | 58.4°F |
| Oct 9 | 57.1°F | 56.5°F | 58.3°F |
| Oct 10 | 57.2°F | 56.9°F | 58.3°F |
| Oct 11 | 57.1°F | 55.8°F | 58.2°F |
| Oct 12 | 57.1°F | 55.8°F | 58.1°F |
| Oct 13 | 57.3°F | 56.7°F | 58.3°F |
| Oct 14 | 57.3°F | 57.7°F | 58.3°F |
| Oct 15 | 57.1°F | 57.4°F | 58.1°F |
| Oct 16 | 57.0°F | 57.3°F | 58.1°F |
| Oct 17 | 57.3°F | 58.3°F | 58.4°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.