Water temperature in San Juan
86.5
°F
April 19, 10:50
Trend:
increasingYesterday:
86.3°FTomorrow:
86.6°F
Sunrise:
Sunset:
Day Length:
12 h. 28 min.San Juan in April
Minimum:
77.9°FAverage:
80.7°FMaximum:
83.0°FSea water temperature in San Juan today
As of now, in San Juan, the water temperature is 86.5°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 2.2°F higher 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 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 is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 86.3°F on 2024, while the historical minimum was 82.7°F on 2015.
Daily water temperature in San Juan
| Date |
Current Year
actual* / forecast** |
last year | 10 years average |
|---|---|---|---|
| Apr 5 | 82.7°F | 85.2°F | 83.0°F |
| Apr 6 | 83.1°F | 86.0°F | 83.1°F |
| Apr 7 | 83.9°F | 85.1°F | 83.2°F |
| Apr 8 | 84.1°F | 85.1°F | 83.1°F |
| Apr 9 | 84.5°F | 85.6°F | 83.2°F |
| Apr 10 | 84.7°F | 85.0°F | 83.2°F |
| Apr 11 | 85.2°F | 85.1°F | 83.4°F |
| Apr 12 | 85.8°F | 85.0°F | 83.7°F |
| Apr 13 | 86.0°F | 83.9°F | 83.7°F |
| Apr 14 | 85.4°F | 85.0°F | 83.7°F |
| Apr 15 | 84.6°F | 85.3°F | 83.8°F |
| Apr 16 | 85.3°F | 85.4°F | 83.9°F |
| Apr 17 | 86.0°F | 84.8°F | 84.1°F |
| Apr 18 | 86.3°F | 85.4°F | 84.0°F |
| Apr 19 | 86.5°F | 86.3°F | 84.2°F |
| Apr 20 | 86.6°F | 86.1°F | 84.4°F |
| Apr 21 | 86.9°F | 86.5°F | 84.7°F |
| Apr 22 | 87.1°F | 86.5°F | 84.9°F |
| Apr 23 | 87.1°F | 85.9°F | 84.9°F |
| Apr 24 | 87.3°F | 86.3°F | 85.0°F |
| Apr 25 | 87.4°F | 86.8°F | 85.1°F |
| Apr 26 | 87.2°F | 86.5°F | 85.0°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.