What is the current water temperature in San Juan?

Q: What is the current water temperature in San Juan?

As of now, in San Juan, the water temperature is 15.04°C. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration.

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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.

59.1

°F

August 8, 14:25

Trend:

stable

Yesterday:

59.5°F

Tomorrow:

59.1°F

Sunrise:

06:21

Sunset:

17:52

Day Length:

11 h. 31 min.

San Juan in August

Minimum:

61.6°F

Average:

65.9°F

Maximum:

69.1°F

Sea water temperature in San Juan today

As of now, in San Juan, the water temperature is 59.1°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is 0.2°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 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 falls within the range of the average temperature recorded for this date, suggesting a consistent weather trend. The maximum temperature recorded for this date was 62.4°F on 2023, while the historical minimum was 56.8°F on 2019.

latest data

last year

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 maximum recorded over the past years. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 59.1°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
Jul 25	59.5°F	58.4°F	59.5°F
Jul 26	59.4°F	56.6°F	59.0°F
Jul 27	59.3°F	57.4°F	58.8°F
Jul 28	60.0°F	58.0°F	59.0°F
Jul 29	60.3°F	55.3°F	58.7°F
Jul 30	59.7°F	56.6°F	58.9°F
Jul 31	59.8°F	56.0°F	58.9°F
Aug 1	61.0°F	56.8°F	59.0°F
Aug 2	59.3°F	57.8°F	59.1°F
Aug 3	59.7°F	58.0°F	58.8°F
Aug 4	59.3°F	56.8°F	58.6°F
Aug 5	59.2°F	57.5°F	58.6°F
Aug 6	59.4°F	57.6°F	58.8°F
Aug 7	59.5°F	57.7°F	58.9°F
Aug 8	59.1°F	57.3°F	58.9°F
Aug 9	59.1°F	56.8°F	58.9°F
Aug 10	59.3°F	57.1°F	59.1°F
Aug 11	59.2°F	57.0°F	59.0°F
Aug 12	59.0°F	56.8°F	58.8°F
Aug 13	58.8°F	56.6°F	58.6°F
Aug 14	59.1°F	56.9°F	58.9°F
Aug 15	59.0°F	56.8°F	58.8°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 an average year, San Juan offers no days when the water temperature is warm enough to swim comfortably.

The warmest water in San Juan was recorded on February 10, 2023, reaching a 72.2°F. While the coldest temperature occurred on October 19, 2021, dipping to 53.4°F. The average readings by season are 65.5°F in Winter, 63.5°F in Spring, 59.5°F in Summer, and 59.0°F in Autumn.