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

86.8

°F

May 25, 01:52

Trend:

stable

Yesterday:

86.8°F

Tomorrow:

86.8°F

Sunrise:

05:26

Sunset:

18:26

Day Length:

13 h. 0 min.

San Juan in May

Minimum:

82.1°F

Average:

83.0°F

Maximum:

84.2°F

Sea water temperature in San Juan today

As of now, in San Juan, the water temperature is 86.8°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 stay about the same.

Recent sea temperature and forecast

Today's water temperature closely matches the previous two weeks' average, indicating a stable trend. It also aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 87.7°F on 2018, while the historical minimum was 86.3°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 histoorical minimum and others when it was close to the historical maximum. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 87.0°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
May 11 86.4°F 86.1°F 86.6°F
May 12 87.0°F 86.3°F 86.8°F
May 13 87.6°F 86.6°F 86.8°F
May 14 86.7°F 86.5°F 86.6°F
May 15 86.4°F 87.3°F 86.8°F
May 16 86.3°F 87.3°F 86.8°F
May 17 86.3°F 87.2°F 86.8°F
May 18 87.5°F 87.4°F 86.9°F
May 19 87.5°F 87.2°F 87.0°F
May 20 87.0°F 87.6°F 87.1°F
May 21 87.4°F 86.9°F 86.9°F
May 22 87.4°F 87.4°F 87.0°F
May 23 86.9°F 87.7°F 86.9°F
May 24 86.8°F 87.5°F 86.9°F
May 25 86.8°F 87.4°F 87.0°F
May 26 86.8°F 87.4°F 87.0°F
May 27 87.0°F 87.3°F 87.1°F
May 28 87.1°F 87.2°F 87.3°F
May 29 87.1°F 87.0°F 87.2°F
May 30 87.1°F 86.9°F 87.2°F
May 31 87.1°F 86.8°F 87.2°F
Jun 1 87.1°F 86.9°F 87.2°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 6, 2023, reaching a 88.8°F. While the coldest temperature occurred on February 8, 2016, dipping to 79.4°F. The average readings by season are 82.6°F in Winter, 84.6°F in Spring, 86.3°F in Summer, and 85.4°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Santa Maria 87.1°F 21mi
Zaragoza 87.7°F 33mi
Santiago 87.5°F 44mi

* current water temperature in this city

** straight line distance from San Juan