All data are in degrees Fahrenheit

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Water temperature in San Juan

Detailed information about the current water temperature in San Juan. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.
Sea temperature in San Juan now

67.4

°F

February 2, 09:47

Trend:

increasing

Yesterday:

66.8°F

Tomorrow:

67.9°F

Sunrise:

05:52

Sunset:

18:37

Day Length:

12 h. 45 min.

San Juan in February

Minimum:

61.5°F

Average:

64.8°F

Maximum:

66.9°F

Sea water temperature in San Juan today

As of now, in San Juan, the water temperature is 67.4°F. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool. Today's reading is 0.7°F higher 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 rise a bit.

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 71.3°F on 2017, while the historical minimum was 60.4°F on 2021.

Over the past two weeks, the water temperature has closely aligned with historical averages for those days. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 67.9°F, with minimum temperature starting at 67.4°F, while the maximum might reach 68.2°F.

Daily water temperature in San Juan

Date Current Year

actual* / forecast**

last year 10 years average
Jan 19 65.2°F 64.8°F 66.4°F
Jan 20 63.5°F 64.8°F 66.3°F
Jan 21 66.1°F 66.1°F 66.6°F
Jan 22 66.0°F 66.8°F 66.5°F
Jan 23 67.5°F 66.8°F 66.9°F
Jan 24 66.4°F 65.7°F 66.3°F
Jan 25 66.9°F 66.9°F 67.0°F
Jan 26 66.6°F 66.6°F 67.0°F
Jan 27 65.6°F 68.1°F 67.1°F
Jan 28 63.6°F 67.9°F 66.7°F
Jan 29 65.9°F 67.7°F 66.8°F
Jan 30 65.1°F 67.0°F 66.7°F
Jan 31 64.0°F 64.6°F 66.1°F
Feb 1 66.8°F 67.7°F 67.2°F
Feb 2 67.4°F 65.9°F 66.7°F
Feb 3 67.9°F 66.8°F 67.2°F
Feb 4 67.4°F 63.6°F 66.7°F
Feb 5 67.9°F 65.5°F 67.2°F
Feb 6 68.2°F 65.9°F 67.5°F
Feb 7 68.1°F 66.1°F 67.5°F
Feb 8 67.9°F 66.6°F 67.2°F
Feb 9 67.6°F 66.6°F 66.9°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.

Sea water temperature in San Juan by month

In an average year, San Juan offers no days when the water temperature is warm enough to swim comfortably.
The warmest water in San Juan was recorded on February 10, 2023, reaching a 72.2°F. While the coldest temperature occurred on October 19, 2021, dipping to 53.4°F. The average readings by season are 65.1°F in Winter, 63.3°F in Spring, 59.2°F in Summer, and 58.6°F in Autumn.