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

83.2

°F

January 31, 07:02

Trend:

stable

Yesterday:

83.1°F

Tomorrow:

83.1°F

Sunrise:

06:06

Sunset:

17:45

Day Length:

11 h. 39 min.

San Juan in February

Minimum:

81.5°F

Average:

82.7°F

Maximum:

84.1°F

Sea water temperature in San Juan today

As of now, in San Juan, the water temperature is 83.2°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 1.2°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 fall a bit.

Recent sea temperature and forecast

Today's water temperature slightly varies from the average of the past two weeks. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 83.9°F on 2020, while the historical minimum was 80.4°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. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 82.8°F, the minimum temperature may reach 82.5°F, and the maximum might stay at 83.1°F.

Daily water temperature in San Juan

Date Current Year

actual* / forecast**

last year 10 years average
Jan 17 83.4°F 83.0°F 82.1°F
Jan 18 83.4°F 82.6°F 82.0°F
Jan 19 83.5°F 82.5°F 82.2°F
Jan 20 83.3°F 82.3°F 82.1°F
Jan 21 82.9°F 82.1°F 82.0°F
Jan 22 82.8°F 82.3°F 82.0°F
Jan 23 82.6°F 82.1°F 82.0°F
Jan 24 83.2°F 82.7°F 82.1°F
Jan 25 83.4°F 83.0°F 82.2°F
Jan 26 83.6°F 82.8°F 82.1°F
Jan 27 83.6°F 82.6°F 82.0°F
Jan 28 83.3°F 82.3°F 82.0°F
Jan 29 83.1°F 82.1°F 82.0°F
Jan 30 83.1°F 82.1°F 81.9°F
Jan 31 83.2°F 82.1°F 82.1°F
Feb 1 83.1°F 81.9°F 81.9°F
Feb 2 83.0°F 81.6°F 81.8°F
Feb 3 83.0°F 81.7°F 81.8°F
Feb 4 82.9°F 82.0°F 81.8°F
Feb 5 82.8°F 81.4°F 81.6°F
Feb 6 82.7°F 81.1°F 81.5°F
Feb 7 82.5°F 80.9°F 81.3°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 August 22, 2024, reaching a 88.9°F. While the coldest temperature occurred on January 13, 2015, dipping to 78.8°F. The average readings by season are 82.5°F in Winter, 84.1°F in Spring, 86.3°F in Summer, and 85.7°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Merida 83.5°F 6mi
Limon 83.1°F 20mi
San Francisco 83.6°F 27mi
Santiago 83.8°F 32mi
San Jose 83.0°F 34mi
Tacloban 83.6°F 36mi

* current water temperature in this city

** straight line distance from San Juan