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

82.7

°F

December 22, 13:06

Trend:

decreasing

Yesterday:

82.8°F

Tomorrow:

82.5°F

Sunrise:

06:25

Sunset:

17:29

Day Length:

11 h. 4 min.

San Juan in December

Minimum:

80.0°F

Average:

81.7°F

Maximum:

83.0°F

Sea water temperature in San Juan today

As of now, in San Juan, the water temperature is 82.7°F. Swimming in water of this temperature is considered highly warm and would be enjoyable for everyone. At this temperature, you can comfortably engage in water-based activities for extended periods without experiencing discomfort. Today's reading is about the same as 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 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 84.5°F on 2016, while the historical minimum was 80.9°F on 2017.

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the maximum recorded over the past years. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 82.5°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in San Juan

Date Current Year

actual* / forecast**

last year 10 years average
Dec 8 84.3°F 84.7°F 83.8°F
Dec 9 83.3°F 84.2°F 83.3°F
Dec 10 83.7°F 84.4°F 83.3°F
Dec 11 83.2°F 84.5°F 83.1°F
Dec 12 83.9°F 84.6°F 83.2°F
Dec 13 83.8°F 85.3°F 83.6°F
Dec 14 84.6°F 85.3°F 83.7°F
Dec 15 84.5°F 84.8°F 83.6°F
Dec 16 83.0°F 84.2°F 83.2°F
Dec 17 83.4°F 84.4°F 83.2°F
Dec 18 83.6°F 84.7°F 83.0°F
Dec 19 83.8°F 84.7°F 82.7°F
Dec 20 82.9°F 84.4°F 82.5°F
Dec 21 82.8°F 84.0°F 82.7°F
Dec 22 82.7°F 84.0°F 82.7°F
Dec 23 82.5°F 83.5°F 82.4°F
Dec 24 82.4°F 82.3°F 82.4°F
Dec 25 82.4°F 81.5°F 82.3°F
Dec 26 82.5°F 80.3°F 82.4°F
Dec 27 82.4°F 80.9°F 82.4°F
Dec 28 82.6°F 81.9°F 82.6°F
Dec 29 82.6°F 82.3°F 82.5°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.

Sea water temperature in San Juan by month

In San Juan, the water temperature is comfortable for swimming all year round.
The warmest water in San Juan was recorded on July 20, 2024, reaching a 89.4°F. While the coldest temperature occurred on February 27, 2023, dipping to 77.3°F. The average readings by season are 81.8°F in Winter, 84.2°F in Spring, 86.5°F in Summer, and 85.2°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Santo Domingo 82.9°F 8mi
San Sebastian 83.2°F 10mi
Santa Maria 83.2°F 26mi
Burgos 83.2°F 28mi
Santiago 83.3°F 31mi
Santa Maria 83.4°F 55mi
Burgos 79.6°F 55mi
Pamplona 78.8°F 77mi

* current water temperature in this city

** straight line distance from San Juan