Water temperature in San Juan
66.1
°F
August 9, 03:40
Trend:
increasingYesterday:
64.6°FTomorrow:
66.3°F
Sunrise:
Sunset:
Day Length:
11 h. 32 min.San Juan in August
Minimum:
61.6°FAverage:
65.6°FMaximum:
69.1°FSea water temperature in San Juan today
As of now, in San Juan, the water temperature is 66.1°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 7.5°F higher than the average recorded on this particular day in recent years. Since yesterday, there was a noticeable 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
The water temperature today is above average for the last two weeks, showing a small increase in temperature. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 62.9°F on 2023, while the historical minimum was 56.4°F on 2019.
Daily water temperature in San Juan
| Date |
Current Year
actual* / forecast** |
last year | 10 years average |
|---|---|---|---|
| Jul 26 | 66.7°F | 59.4°F | 59.6°F |
| Jul 27 | 65.8°F | 59.3°F | 59.4°F |
| Jul 28 | 65.7°F | 60.0°F | 59.6°F |
| Jul 29 | 65.4°F | 60.3°F | 59.3°F |
| Jul 30 | 65.0°F | 59.7°F | 59.3°F |
| Jul 31 | 65.3°F | 59.8°F | 59.3°F |
| Aug 1 | 66.7°F | 61.0°F | 59.5°F |
| Aug 2 | 65.7°F | 59.3°F | 59.6°F |
| Aug 3 | 66.4°F | 59.7°F | 59.4°F |
| Aug 4 | 66.5°F | 59.3°F | 59.2°F |
| Aug 5 | 64.9°F | 59.2°F | 59.1°F |
| Aug 6 | 65.2°F | 59.4°F | 59.2°F |
| Aug 7 | 64.8°F | 59.5°F | 59.3°F |
| Aug 8 | 64.6°F | 59.1°F | 59.3°F |
| Aug 9 | 66.1°F | 58.3°F | 58.6°F |
| Aug 10 | 66.3°F | 58.6°F | 58.8°F |
| Aug 11 | 66.3°F | 58.6°F | 58.8°F |
| Aug 12 | 66.0°F | 57.9°F | 58.5°F |
| Aug 13 | 65.8°F | 58.3°F | 58.3°F |
| Aug 14 | 66.2°F | 58.4°F | 58.7°F |
| Aug 15 | 66.1°F | 58.5°F | 58.6°F |
| Aug 16 | 66.0°F | 59.5°F | 58.5°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.