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 17.45°C. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it.

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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.

63.4

°F

April 16, 18:23

Trend:

decreasing

Yesterday:

63.5°F

Tomorrow:

63.1°F

Sunrise:

06:08

Sunset:

17:53

Day Length:

11 h. 45 min.

San Juan in April

Minimum:

61.2°F

Average:

65.0°F

Maximum:

68.5°F

Sea water temperature in San Juan today

As of now, in San Juan, the water temperature is 63.4°F. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it. 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 fall a bit.

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 68.6°F on 2023, while the historical minimum was 58.0°F on 2022.

latest data

last year

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 63.5°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
Apr 2	63.1°F	60.2°F	63.4°F
Apr 3	62.5°F	61.7°F	63.3°F
Apr 4	64.7°F	60.1°F	63.6°F
Apr 5	61.7°F	59.3°F	63.2°F
Apr 6	63.7°F	60.1°F	63.8°F
Apr 7	64.6°F	60.6°F	64.1°F
Apr 8	63.4°F	60.4°F	63.4°F
Apr 9	63.2°F	63.1°F	63.9°F
Apr 10	64.6°F	60.4°F	63.5°F
Apr 11	63.7°F	61.1°F	63.3°F
Apr 12	66.4°F	62.1°F	63.6°F
Apr 13	63.3°F	63.1°F	63.8°F
Apr 14	65.1°F	61.0°F	63.4°F
Apr 15	63.5°F	60.5°F	63.2°F
Apr 16	63.4°F	58.6°F	62.9°F
Apr 17	63.1°F	58.8°F	62.5°F
Apr 18	63.1°F	58.5°F	62.5°F
Apr 19	63.6°F	59.5°F	63.0°F
Apr 20	63.6°F	59.8°F	63.0°F
Apr 21	63.6°F	62.0°F	63.0°F
Apr 22	63.7°F	61.9°F	63.1°F
Apr 23	63.7°F	61.6°F	63.2°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, 63.2°F in Spring, 59.2°F in Summer, and 58.6°F in Autumn.