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

84.5

°F

May 2, 00:39

Trend:

increasing

Yesterday:

84.3°F

Tomorrow:

84.7°F

Sunrise:

05:32

Sunset:

18:19

Day Length:

12 h. 47 min.

San Juan in May

Minimum:

81.7°F

Average:

82.5°F

Maximum:

83.3°F

Sea water temperature in San Juan today

As of now, in San Juan, the water temperature is 84.5°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 1.3°F lower 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 rise a bit.

Recent sea temperature and forecast

Today's water temperature is notably higher than the average recorded over the past two weeks, indicating a significant warming trend. It is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 87.4°F on 2024, while the historical minimum was 83.6°F on 2021.

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 minimum recorded over the past years. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 84.9°F, with minimum temperature starting at 84.7°F, while the maximum might reach 85.1°F.

Daily water temperature in San Juan

Date Current Year

actual* / forecast**

last year 10 years average
Apr 18 82.7°F 84.7°F 84.5°F
Apr 19 82.7°F 85.0°F 84.5°F
Apr 20 82.3°F 85.2°F 84.4°F
Apr 21 82.9°F 85.1°F 84.6°F
Apr 22 82.9°F 85.4°F 84.7°F
Apr 23 83.4°F 85.9°F 84.8°F
Apr 24 83.3°F 85.4°F 84.7°F
Apr 25 83.9°F 85.1°F 84.9°F
Apr 26 84.4°F 84.6°F 84.9°F
Apr 27 83.8°F 84.9°F 84.9°F
Apr 28 84.1°F 84.8°F 85.1°F
Apr 29 84.1°F 84.8°F 85.2°F
Apr 30 85.1°F 84.8°F 85.4°F
May 1 84.3°F 85.4°F 85.6°F
May 2 84.5°F 85.7°F 85.8°F
May 3 84.7°F 86.4°F 86.0°F
May 4 84.8°F 85.8°F 86.1°F
May 5 84.8°F 85.8°F 86.1°F
May 6 85.0°F 85.9°F 86.3°F
May 7 85.1°F 86.0°F 86.4°F
May 8 85.1°F 85.2°F 86.4°F
May 9 85.0°F 85.3°F 86.3°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 84.5°F 8mi
San Sebastian 84.6°F 10mi
Santa Maria 84.6°F 26mi
Burgos 84.7°F 28mi
Santiago 84.9°F 31mi
Santa Maria 84.7°F 55mi
Burgos 84.2°F 55mi
Pamplona 82.3°F 77mi

* current water temperature in this city

** straight line distance from San Juan