Water temperature in San Juan
65.7
°F
September 27, 05:20
Trend:
stableYesterday:
65.8°FTomorrow:
65.8°F
Sunrise:
Sunset:
Day Length:
12 h. 10 min.San Juan in October
Minimum:
60.9°FAverage:
65.6°FMaximum:
69.4°FSea water temperature in San Juan today
As of now, in San Juan, the water temperature is 65.7°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 7.5°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 rise a bit.Recent sea temperature and forecast
Today's water temperature closely matches the previous two weeks' average, indicating a stable trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 60.7°F on 2023, while the historical minimum was 55.2°F on 2022.
Daily water temperature in San Juan
| Date |
Current Year
actual* / forecast** |
last year | 10 years average |
|---|---|---|---|
| Sep 13 | 67.5°F | 57.4°F | 58.7°F |
| Sep 14 | 66.4°F | 57.7°F | 58.6°F |
| Sep 15 | 65.6°F | 57.3°F | 58.2°F |
| Sep 16 | 65.4°F | 57.3°F | 58.2°F |
| Sep 17 | 64.8°F | 57.1°F | 57.9°F |
| Sep 18 | 64.2°F | 58.1°F | 58.0°F |
| Sep 19 | 64.9°F | 57.3°F | 58.1°F |
| Sep 20 | 65.4°F | 57.5°F | 58.3°F |
| Sep 21 | 65.2°F | 58.0°F | 58.2°F |
| Sep 22 | 65.3°F | 57.2°F | 58.4°F |
| Sep 23 | 66.0°F | 57.1°F | 58.6°F |
| Sep 24 | 65.5°F | 57.4°F | 58.8°F |
| Sep 25 | 66.2°F | 57.7°F | 59.0°F |
| Sep 26 | 65.8°F | 57.9°F | 58.8°F |
| Sep 27 | 65.7°F | 58.6°F | 58.2°F |
| Sep 28 | 65.8°F | 58.3°F | 58.3°F |
| Sep 29 | 65.3°F | 58.7°F | 57.8°F |
| Sep 30 | 65.3°F | 58.2°F | 57.8°F |
| Oct 1 | 65.4°F | 57.1°F | 57.8°F |
| Oct 2 | 65.3°F | 56.4°F | 57.8°F |
| Oct 3 | 65.5°F | 58.0°F | 58.0°F |
| Oct 4 | 65.3°F | 58.5°F | 57.8°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.