Water temperature in San Juan
66.1
°F
July 24, 22:53
Trend:
decreasingYesterday:
66.3°FTomorrow:
65.9°F
Sunrise:
Sunset:
Day Length:
11 h. 22 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 6.5°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 fall a bit.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 64.6°F on 2023, while the historical minimum was 55.9°F on 2022.
Daily water temperature in San Juan
| Date |
Current Year
actual* / forecast** |
last year | 10 years average |
|---|---|---|---|
| Jul 10 | 64.6°F | 59.3°F | 59.9°F |
| Jul 11 | 64.4°F | 59.6°F | 59.7°F |
| Jul 12 | 65.4°F | 58.7°F | 60.0°F |
| Jul 13 | 66.5°F | 59.4°F | 60.1°F |
| Jul 14 | 67.0°F | 59.5°F | 60.3°F |
| Jul 15 | 67.2°F | 59.6°F | 60.2°F |
| Jul 16 | 66.9°F | 59.7°F | 60.2°F |
| Jul 17 | 66.6°F | 59.6°F | 59.9°F |
| Jul 18 | 66.3°F | 59.4°F | 59.8°F |
| Jul 19 | 66.1°F | 58.6°F | 59.8°F |
| Jul 20 | 67.2°F | 58.8°F | 59.8°F |
| Jul 21 | 66.3°F | 58.5°F | 59.8°F |
| Jul 22 | 67.0°F | 59.3°F | 60.0°F |
| Jul 23 | 66.3°F | 59.8°F | 60.0°F |
| Jul 24 | 66.1°F | 59.7°F | 59.6°F |
| Jul 25 | 65.9°F | 59.5°F | 59.4°F |
| Jul 26 | 65.4°F | 59.4°F | 58.8°F |
| Jul 27 | 65.3°F | 59.3°F | 58.7°F |
| Jul 28 | 65.5°F | 60.0°F | 59.0°F |
| Jul 29 | 65.2°F | 60.3°F | 58.7°F |
| Jul 30 | 65.3°F | 59.7°F | 58.8°F |
| Jul 31 | 65.3°F | 59.8°F | 58.7°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.