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

86.2

°F

August 1, 10:44

Trend:

decreasing

Yesterday:

86.3°F

Tomorrow:

86.1°F

Sunrise:

05:39

Sunset:

18:25

Day Length:

12 h. 46 min.

San Juan in August

Minimum:

79.8°F

Average:

80.7°F

Maximum:

81.4°F

Sea water temperature in San Juan today

As of now, in San Juan, the water temperature is 86.2°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 1.5°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 stay about the same.

Recent sea temperature and forecast

Today's water temperature is slightly lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 85.9°F on 2020, while the historical minimum was 83.8°F on 2025.

Observations from the last two weeks indicate that the water temperature was in proximity to the highest values recorded on those days in the past. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 86.5°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
Jul 18 86.8°F 85.0°F 86.2°F
Jul 19 87.6°F 85.0°F 86.1°F
Jul 20 86.8°F 85.0°F 86.1°F
Jul 21 87.3°F 84.8°F 86.1°F
Jul 22 87.3°F 84.8°F 86.0°F
Jul 23 87.1°F 84.7°F 85.9°F
Jul 24 87.1°F 84.7°F 85.7°F
Jul 25 87.2°F 84.6°F 85.7°F
Jul 26 87.7°F 84.5°F 85.6°F
Jul 27 87.5°F 84.4°F 85.6°F
Jul 28 87.3°F 84.3°F 85.4°F
Jul 29 87.2°F 84.2°F 85.3°F
Jul 30 86.2°F 84.1°F 85.0°F
Jul 31 86.3°F 84.0°F 84.8°F
Aug 1 86.2°F 83.8°F 84.7°F
Aug 2 86.1°F 84.1°F 84.6°F
Aug 3 86.2°F 84.6°F 84.7°F
Aug 4 86.4°F 85.2°F 84.9°F
Aug 5 86.7°F 85.5°F 85.2°F
Aug 6 86.8°F 85.6°F 85.3°F
Aug 7 86.8°F 85.6°F 85.3°F
Aug 8 86.9°F 85.3°F 85.4°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 May 14, 2020, reaching a 89.0°F. While the coldest temperature occurred on February 2, 2019, dipping to 77.9°F. The average readings by season are 81.0°F in Winter, 84.5°F in Spring, 86.2°F in Summer, and 84.7°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Mandaluyong City 86.0°F 1mi
Pasig City 85.7°F 2mi
Manila 86.3°F 3mi
Makati City 86.0°F 3mi
Quezon City 85.9°F 4mi
Pasay 85.9°F 5mi
Caloocan City 86.3°F 6mi
Taguig 85.7°F 6mi
Antipolo 85.7°F 6mi
Paranaque City 85.8°F 8mi

* current water temperature in this city

** straight line distance from San Juan