Water temperature in San Juan
64.7
°F
September 2, 13:13
Trend:
decreasingYesterday:
65.2°FTomorrow:
64.5°F
Sunrise:
Sunset:
Day Length:
11 h. 49 min.San Juan in September
Minimum:
60.9°FAverage:
65.3°FMaximum:
68.9°FSea water temperature in San Juan today
As of now, in San Juan, the water temperature is 64.7°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 7.0°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 considerably 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 62.6°F on 2023, while the historical minimum was 55.6°F on 2021.
Daily water temperature in San Juan
| Date |
Current Year
actual* / forecast** |
last year | 10 years average |
|---|---|---|---|
| Aug 19 | 66.3°F | 59.5°F | 58.9°F |
| Aug 20 | 66.1°F | 58.8°F | 58.9°F |
| Aug 21 | 65.6°F | 58.7°F | 58.9°F |
| Aug 22 | 65.4°F | 60.0°F | 58.9°F |
| Aug 23 | 65.2°F | 59.9°F | 59.0°F |
| Aug 24 | 65.6°F | 59.1°F | 58.8°F |
| Aug 25 | 65.9°F | 59.3°F | 58.9°F |
| Aug 26 | 66.1°F | 57.8°F | 58.9°F |
| Aug 27 | 65.7°F | 56.8°F | 58.7°F |
| Aug 28 | 65.4°F | 56.7°F | 58.5°F |
| Aug 29 | 65.9°F | 56.9°F | 58.8°F |
| Aug 30 | 65.1°F | 57.3°F | 59.0°F |
| Aug 31 | 65.5°F | 56.6°F | 58.7°F |
| Sep 1 | 65.2°F | 57.0°F | 58.7°F |
| Sep 2 | 64.7°F | 56.9°F | 57.7°F |
| Sep 3 | 64.5°F | 56.9°F | 57.5°F |
| Sep 4 | 64.7°F | 56.9°F | 57.7°F |
| Sep 5 | 64.6°F | 56.3°F | 57.6°F |
| Sep 6 | 64.4°F | 56.7°F | 57.4°F |
| Sep 7 | 64.6°F | 58.1°F | 57.6°F |
| Sep 8 | 64.8°F | 57.8°F | 57.8°F |
| Sep 9 | 64.6°F | 56.2°F | 57.6°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.