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

85.1

°F

June 29, 22:52

Trend:

stable

Yesterday:

85.0°F

Tomorrow:

85.1°F

Sunrise:

05:30

Sunset:

18:09

Day Length:

12 h. 39 min.

San Juan in July

Minimum:

80.7°F

Average:

82.0°F

Maximum:

83.8°F

Sea water temperature in San Juan today

As of now, in San Juan, the water temperature is 85.1°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 slightly varies from the average of the past two weeks. 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 86.0°F on 2021, while the historical minimum was 84.2°F on 2015.

Over the past two weeks, the water temperature has closely aligned with historical averages for those days. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 84.9°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
Jun 15 85.5°F 86.1°F 85.4°F
Jun 16 85.3°F 85.9°F 85.3°F
Jun 17 86.1°F 85.7°F 85.2°F
Jun 18 85.9°F 85.4°F 85.2°F
Jun 19 85.2°F 85.3°F 85.2°F
Jun 20 85.0°F 85.1°F 85.1°F
Jun 21 84.8°F 84.9°F 84.9°F
Jun 22 84.7°F 85.2°F 85.0°F
Jun 23 85.0°F 85.1°F 84.9°F
Jun 24 84.9°F 85.0°F 85.2°F
Jun 25 84.9°F 85.0°F 85.1°F
Jun 26 84.8°F 85.7°F 85.0°F
Jun 27 85.2°F 85.5°F 85.1°F
Jun 28 85.0°F 85.6°F 85.1°F
Jun 29 85.1°F 85.5°F 85.1°F
Jun 30 85.1°F 85.4°F 85.1°F
Jul 1 85.0°F 85.3°F 85.0°F
Jul 2 84.8°F 85.2°F 84.8°F
Jul 3 84.8°F 85.3°F 84.9°F
Jul 4 84.9°F 85.1°F 84.9°F
Jul 5 84.9°F 85.2°F 85.0°F
Jul 6 84.9°F 85.2°F 85.0°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 August 21, 2024, reaching a 87.2°F. While the coldest temperature occurred on February 29, 2016, dipping to 78.5°F. The average readings by season are 81.8°F in Winter, 82.7°F in Spring, 84.8°F in Summer, and 84.8°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Valencia 85.2°F 19mi
San Jose 84.9°F 25mi
Pamplona 84.6°F 33mi
Panglao 85.2°F 34mi
Valencia 84.8°F 43mi
Barcelona 84.8°F 44mi

* current water temperature in this city

** straight line distance from San Juan