Water temperature in San Juan
83.1
°F
December 21, 08:04
Trend:
stableYesterday:
83.2°FTomorrow:
83.1°F
Sunrise:
Sunset:
Day Length:
11 h. 2 min.San Juan in December
Minimum:
79.8°FAverage:
80.7°FMaximum:
81.4°FSea water temperature in San Juan today
As of now, in San Juan, the water temperature is 83.1°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 1.4°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 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 is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 82.5°F on 2019, while the historical minimum was 81.1°F on 2022.
Daily water temperature in San Juan
| Date |
Current Year
actual* / forecast** |
last year | 10 years average |
|---|---|---|---|
| Dec 7 | 84.3°F | 83.1°F | 82.8°F |
| Dec 8 | 84.4°F | 83.1°F | 82.8°F |
| Dec 9 | 84.4°F | 83.0°F | 82.7°F |
| Dec 10 | 84.2°F | 82.9°F | 82.7°F |
| Dec 11 | 84.0°F | 82.6°F | 82.6°F |
| Dec 12 | 84.0°F | 82.5°F | 82.5°F |
| Dec 13 | 83.8°F | 82.3°F | 82.4°F |
| Dec 14 | 83.7°F | 82.3°F | 82.3°F |
| Dec 15 | 83.6°F | 81.9°F | 82.2°F |
| Dec 16 | 83.6°F | 81.6°F | 82.2°F |
| Dec 17 | 83.4°F | 81.4°F | 82.1°F |
| Dec 18 | 83.5°F | 81.7°F | 82.1°F |
| Dec 19 | 83.2°F | 81.8°F | 82.0°F |
| Dec 20 | 83.2°F | 81.7°F | 82.0°F |
| Dec 21 | 83.1°F | 81.9°F | 81.7°F |
| Dec 22 | 83.1°F | 82.0°F | 81.7°F |
| Dec 23 | 83.1°F | 82.1°F | 81.7°F |
| Dec 24 | 83.1°F | 81.9°F | 81.7°F |
| Dec 25 | 83.1°F | 81.9°F | 81.7°F |
| Dec 26 | 83.0°F | 81.9°F | 81.6°F |
| Dec 27 | 82.9°F | 81.8°F | 81.5°F |
| Dec 28 | 82.8°F | 81.8°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.