Water temperature in San Juan
61.3
°F
May 18, 11:47
Trend:
stableYesterday:
60.5°FTomorrow:
61.2°F
Sunrise:
Sunset:
Day Length:
11 h. 22 min.San Juan in May
Minimum:
60.3°FAverage:
65.3°FMaximum:
68.6°FSea water temperature in San Juan today
As of now, in San Juan, the water temperature is 61.3°F. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it. Today's reading is 0.2°F lower 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 stay about the same.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 65.9°F on 2017, while the historical minimum was 57.9°F on 2022.
Daily water temperature in San Juan
| Date |
Current Year
actual* / forecast** |
last year | 10 years average |
|---|---|---|---|
| May 4 | 60.6°F | 62.1°F | 61.9°F |
| May 5 | 59.7°F | 60.5°F | 61.7°F |
| May 6 | 60.0°F | 63.1°F | 62.1°F |
| May 7 | 60.0°F | 61.9°F | 62.0°F |
| May 8 | 59.3°F | 61.3°F | 61.8°F |
| May 9 | 58.6°F | 61.9°F | 61.8°F |
| May 10 | 58.6°F | 62.0°F | 61.8°F |
| May 11 | 58.7°F | 62.2°F | 62.0°F |
| May 12 | 58.7°F | 62.1°F | 61.9°F |
| May 13 | 59.1°F | 61.7°F | 61.5°F |
| May 14 | 59.3°F | 61.8°F | 61.6°F |
| May 15 | 59.8°F | 59.2°F | 61.5°F |
| May 16 | 59.7°F | 59.9°F | 61.3°F |
| May 17 | 60.5°F | 60.3°F | 61.4°F |
| May 18 | 61.3°F | 60.7°F | 61.5°F |
| May 19 | 61.2°F | 60.5°F | 61.4°F |
| May 20 | 61.4°F | 60.6°F | 61.6°F |
| May 21 | 61.0°F | 57.8°F | 61.2°F |
| May 22 | 60.9°F | 59.3°F | 61.1°F |
| May 23 | 60.6°F | 58.9°F | 60.8°F |
| May 24 | 60.7°F | 59.0°F | 60.9°F |
| May 25 | 61.1°F | 58.6°F | 61.3°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.