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

87.5

°F

October 19, 22:28

Trend:

stable

Yesterday:

87.5°F

Tomorrow:

87.5°F

Sunrise:

05:52

Sunset:

17:34

Day Length:

11 h. 42 min.

San Juan in October

Minimum:

80.8°F

Average:

82.1°F

Maximum:

83.1°F

Sea water temperature in San Juan today

As of now, in San Juan, the water temperature is 87.5°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 1.9°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

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 86.7°F on 2024, while the historical minimum was 83.6°F on 2019.

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 87.5°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
Oct 5 87.2°F 84.8°F 86.1°F
Oct 6 87.1°F 85.5°F 86.1°F
Oct 7 87.0°F 85.6°F 85.9°F
Oct 8 87.3°F 85.4°F 86.1°F
Oct 9 86.6°F 85.0°F 85.9°F
Oct 10 87.4°F 85.6°F 86.0°F
Oct 11 87.1°F 85.4°F 85.9°F
Oct 12 87.2°F 85.2°F 85.9°F
Oct 13 86.8°F 85.7°F 85.8°F
Oct 14 86.8°F 86.4°F 85.8°F
Oct 15 87.3°F 85.8°F 85.7°F
Oct 16 86.6°F 86.2°F 85.7°F
Oct 17 86.8°F 86.3°F 85.7°F
Oct 18 87.5°F 86.1°F 85.8°F
Oct 19 87.5°F 86.0°F 85.6°F
Oct 20 87.5°F 85.4°F 85.6°F
Oct 21 87.5°F 85.4°F 85.6°F
Oct 22 87.5°F 85.2°F 85.6°F
Oct 23 87.5°F 85.1°F 85.6°F
Oct 24 87.5°F 85.1°F 85.5°F
Oct 25 87.6°F 85.3°F 85.6°F
Oct 26 87.6°F 86.4°F 85.6°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 87.5°F 8mi
San Sebastian 87.4°F 10mi
Santa Maria 87.3°F 26mi
Burgos 87.5°F 28mi
Santiago 87.7°F 31mi
Santa Maria 88.0°F 55mi
Burgos 84.1°F 55mi
Pamplona 84.1°F 77mi

* current water temperature in this city

** straight line distance from San Juan