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

88.0

°F

July 11, 00:08

Trend:

stable

Yesterday:

87.9°F

Tomorrow:

87.7°F

Sunrise:

05:30

Sunset:

18:37

Day Length:

13 h. 7 min.

San Juan in July

Minimum:

81.8°F

Average:

82.4°F

Maximum:

83.1°F

Sea water temperature in San Juan today

As of now, in San Juan, the water temperature is 88.0°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 0.8°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

The water temperature today is above average for the last two weeks, showing a small increase in temperature. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 88.1°F on 2024, while the historical minimum was 85.4°F on 2018.

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 histoorical minimum and others when it was close to the historical maximum. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 87.6°F, the minimum temperature may reach 87.4°F, and the maximum might stay at 87.7°F.

Daily water temperature in San Juan

Date Current Year

actual* / forecast**

last year 10 years average
Jun 27 86.4°F 86.5°F 87.1°F
Jun 28 86.2°F 86.4°F 87.1°F
Jun 29 86.1°F 86.4°F 86.9°F
Jun 30 86.6°F 86.3°F 86.9°F
Jul 1 87.1°F 86.5°F 87.1°F
Jul 2 87.2°F 86.7°F 87.1°F
Jul 3 87.1°F 86.8°F 87.2°F
Jul 4 87.0°F 86.8°F 87.3°F
Jul 5 87.4°F 86.7°F 87.2°F
Jul 6 87.8°F 86.7°F 87.3°F
Jul 7 88.0°F 86.5°F 87.2°F
Jul 8 87.8°F 86.4°F 87.1°F
Jul 9 88.6°F 86.3°F 87.3°F
Jul 10 87.9°F 86.3°F 87.1°F
Jul 11 88.0°F 85.7°F 87.2°F
Jul 12 87.7°F 84.8°F 86.9°F
Jul 13 87.6°F 85.4°F 86.8°F
Jul 14 87.7°F 85.9°F 86.9°F
Jul 15 87.6°F 85.7°F 86.7°F
Jul 16 87.5°F 85.6°F 86.7°F
Jul 17 87.5°F 85.5°F 86.6°F
Jul 18 87.4°F 85.4°F 86.6°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.

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 82.1°F in Winter, 84.3°F in Spring, 86.5°F in Summer, and 85.3°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Santo Domingo 87.9°F 8mi
San Sebastian 87.7°F 10mi
Santa Maria 87.3°F 26mi
Burgos 87.3°F 28mi
Santiago 87.3°F 31mi
Santa Maria 86.9°F 55mi
Burgos 87.7°F 55mi
Pamplona 85.7°F 77mi

* current water temperature in this city

** straight line distance from San Juan