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

80.1

°F

January 19, 20:45

Trend:

increasing

Yesterday:

79.9°F

Tomorrow:

80.2°F

Sunrise:

06:22

Sunset:

17:48

Day Length:

11 h. 26 min.

San Juan in January

Minimum:

79.7°F

Average:

81.0°F

Maximum:

82.0°F

Sea water temperature in San Juan today

As of now, in San Juan, the water temperature is 80.1°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is about the same as the average recorded on this particular day in recent years. Since yesterday, there was a slight increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to stay about the same.

Recent sea temperature and forecast

Today's water temperature is slightly lower than the average registered over the last two weeks, indicating a slight cooling 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 81.3°F on 2016, while the historical minimum was 79.6°F on 2017.

Over the last two weeks, the water temperature has stayed slightly lower than historical averages for those days. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 80.1°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
Jan 5 81.2°F 81.1°F 80.9°F
Jan 6 81.1°F 80.9°F 80.9°F
Jan 7 80.9°F 81.2°F 80.8°F
Jan 8 80.7°F 80.8°F 80.7°F
Jan 9 80.5°F 80.7°F 80.6°F
Jan 10 80.2°F 80.9°F 80.7°F
Jan 11 80.1°F 80.7°F 80.7°F
Jan 12 80.0°F 80.5°F 80.5°F
Jan 13 79.9°F 80.4°F 80.3°F
Jan 14 79.8°F 80.3°F 80.3°F
Jan 15 79.8°F 80.2°F 80.3°F
Jan 16 80.0°F 80.1°F 80.3°F
Jan 17 79.9°F 80.2°F 80.2°F
Jan 18 79.9°F 80.2°F 80.3°F
Jan 19 80.1°F 79.9°F 80.3°F
Jan 20 80.2°F 79.9°F 80.3°F
Jan 21 80.1°F 80.1°F 80.2°F
Jan 22 80.1°F 80.0°F 80.2°F
Jan 23 80.1°F 80.2°F 80.3°F
Jan 24 80.2°F 80.0°F 80.4°F
Jan 25 80.1°F 79.7°F 80.3°F
Jan 26 80.1°F 80.5°F 80.3°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 June 7, 2020, reaching a 89.2°F. While the coldest temperature occurred on February 17, 2017, dipping to 78.5°F. The average readings by season are 80.9°F in Winter, 84.1°F in Spring, 86.1°F in Summer, and 84.3°F in Autumn.