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

82.0

°F

February 19, 20:59

Trend:

stable

Yesterday:

82.1°F

Tomorrow:

82.1°F

Sunrise:

06:24

Sunset:

18:01

Day Length:

11 h. 37 min.

San Juan in February

Minimum:

81.2°F

Average:

82.5°F

Maximum:

83.5°F

Sea water temperature in San Juan today

As of now, in San Juan, the water temperature is 82.0°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 0.9°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 82.7°F on 2025, while the historical minimum was 79.4°F on 2016.

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 82.0°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
Feb 5 81.9°F 81.3°F 81.2°F
Feb 6 81.3°F 81.3°F 81.1°F
Feb 7 81.8°F 80.7°F 81.2°F
Feb 8 82.5°F 81.2°F 81.2°F
Feb 9 81.4°F 81.4°F 81.1°F
Feb 10 80.9°F 81.3°F 80.9°F
Feb 11 80.9°F 81.5°F 80.8°F
Feb 12 81.2°F 81.6°F 80.8°F
Feb 13 81.1°F 81.7°F 80.9°F
Feb 14 81.5°F 82.1°F 81.1°F
Feb 15 81.1°F 82.1°F 81.1°F
Feb 16 81.8°F 82.3°F 81.2°F
Feb 17 82.2°F 82.4°F 81.2°F
Feb 18 82.1°F 82.5°F 81.2°F
Feb 19 82.0°F 82.7°F 81.1°F
Feb 20 82.1°F 82.6°F 81.2°F
Feb 21 82.1°F 82.5°F 81.1°F
Feb 22 82.0°F 82.3°F 81.0°F
Feb 23 82.0°F 82.4°F 81.1°F
Feb 24 82.1°F 82.3°F 81.1°F
Feb 25 82.0°F 82.1°F 81.1°F
Feb 26 82.0°F 82.5°F 81.1°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, 84.4°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 81.9°F 8mi
San Sebastian 81.8°F 10mi
Santa Maria 81.6°F 26mi
Burgos 81.8°F 28mi
Santiago 82.0°F 31mi
Santa Maria 81.9°F 55mi
Burgos 80.2°F 55mi
Pamplona 78.6°F 77mi

* current water temperature in this city

** straight line distance from San Juan