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 19.74°C. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool.

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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.

67.5

°F

January 23, 06:59

Trend:

stable

Yesterday:

66.0°F

Tomorrow:

67.1°F

Sunrise:

05:47

Sunset:

18:38

Day Length:

12 h. 51 min.

San Juan in January

Minimum:

58.3°F

Average:

64.0°F

Maximum:

66.3°F

Sea water temperature in San Juan today

As of now, in San Juan, the water temperature is 67.5°F. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool. Today's reading is 0.7°F higher than the average recorded on this particular day in recent years. Since yesterday, there was a noticeable increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to fall a bit.

Recent sea temperature and forecast

Today's water temperature is notably higher than the average recorded over the past two weeks, indicating a significant warming 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 71.9°F on 2024, while the historical minimum was 59.9°F on 2022.

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 minimum recorded over the past years. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 67.6°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 9	60.9°F	62.1°F	65.3°F
Jan 10	62.2°F	63.1°F	65.6°F
Jan 11	62.9°F	61.3°F	65.2°F
Jan 12	62.3°F	60.9°F	65.3°F
Jan 13	63.3°F	58.5°F	65.2°F
Jan 14	64.2°F	60.2°F	65.2°F
Jan 15	63.9°F	60.5°F	65.1°F
Jan 16	64.6°F	62.6°F	65.8°F
Jan 17	65.6°F	63.1°F	66.4°F
Jan 18	64.5°F	64.2°F	66.2°F
Jan 19	65.2°F	64.8°F	66.4°F
Jan 20	63.5°F	64.8°F	66.3°F
Jan 21	66.1°F	66.1°F	66.6°F
Jan 22	66.0°F	66.8°F	66.5°F
Jan 23	67.5°F	66.8°F	66.8°F
Jan 24	67.1°F	65.7°F	66.3°F
Jan 25	67.7°F	66.9°F	67.0°F
Jan 26	67.8°F	66.6°F	67.1°F
Jan 27	68.0°F	68.1°F	67.3°F
Jan 28	67.7°F	67.9°F	67.0°F
Jan 29	67.6°F	67.7°F	66.8°F
Jan 30	67.6°F	67.0°F	66.9°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 65.1°F in Winter, 63.3°F in Spring, 59.2°F in Summer, and 58.6°F in Autumn.