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

December 2, 02:30

Trend:

stable

Yesterday:

83.3°F

Tomorrow:

83.2°F

Sunrise:

06:03

Sunset:

17:25

Day Length:

11 h. 22 min.

San Juan in December

Minimum:

77.5°F

Average:

80.3°F

Maximum:

81.4°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 0.6°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 closely matches the previous two weeks' average, indicating a stable trend. It also aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 84.0°F on 2022, while the historical minimum was 82.0°F on 2018.

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 83.2°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
Nov 18 83.9°F 84.0°F 83.5°F
Nov 19 83.2°F 84.4°F 83.4°F
Nov 20 83.4°F 84.5°F 83.4°F
Nov 21 83.7°F 84.6°F 83.5°F
Nov 22 83.4°F 84.5°F 83.3°F
Nov 23 83.3°F 84.1°F 83.4°F
Nov 24 83.1°F 84.1°F 83.2°F
Nov 25 83.0°F 84.1°F 83.3°F
Nov 26 82.9°F 83.8°F 83.1°F
Nov 27 82.8°F 83.6°F 83.1°F
Nov 28 82.7°F 83.5°F 83.1°F
Nov 29 82.8°F 84.1°F 83.1°F
Nov 30 83.2°F 83.6°F 82.9°F
Dec 1 83.3°F 83.2°F 82.7°F
Dec 2 83.2°F 82.8°F 82.7°F
Dec 3 83.2°F 82.7°F 82.7°F
Dec 4 83.3°F 82.5°F 82.7°F
Dec 5 83.2°F 83.0°F 82.6°F
Dec 6 83.3°F 83.6°F 82.7°F
Dec 7 83.2°F 83.3°F 82.6°F
Dec 8 83.2°F 83.4°F 82.7°F
Dec 9 83.0°F 83.2°F 82.5°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 June 7, 2020, reaching a 89.2°F. While the coldest temperature occurred on January 26, 2015, dipping to 77.2°F. The average readings by season are 80.7°F in Winter, 84.0°F in Spring, 86.0°F in Summer, and 84.3°F in Autumn.