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 17.01°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.

62.6

°F

December 22, 00:29

Trend:

decreasing

Yesterday:

62.7°F

Tomorrow:

62.2°F

Sunrise:

05:28

Sunset:

18:31

Day Length:

13 h. 3 min.

San Juan in December

Minimum:

59.7°F

Average:

66.5°F

Maximum:

69.2°F

Sea water temperature in San Juan today

As of now, in San Juan, the water temperature is 62.6°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 1.3°F lower 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 notably higher than the average recorded over the past two weeks, indicating a significant warming trend. It is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 65.8°F on 2016, while the historical minimum was 61.6°F on 2020.

latest data

last year

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 62.8°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
Dec 8	60.0°F	61.0°F	61.6°F
Dec 9	59.3°F	63.0°F	61.8°F
Dec 10	60.3°F	64.1°F	62.1°F
Dec 11	61.0°F	62.8°F	62.4°F
Dec 12	61.2°F	63.1°F	62.4°F
Dec 13	61.5°F	64.1°F	62.5°F
Dec 14	61.4°F	64.0°F	62.9°F
Dec 15	62.0°F	62.1°F	62.9°F
Dec 16	62.5°F	64.5°F	63.2°F
Dec 17	61.0°F	64.8°F	63.4°F
Dec 18	62.5°F	65.2°F	63.8°F
Dec 19	61.7°F	65.0°F	63.9°F
Dec 20	62.2°F	64.7°F	63.6°F
Dec 21	62.7°F	65.2°F	63.9°F
Dec 22	62.6°F	65.6°F	63.9°F
Dec 23	62.2°F	64.0°F	63.5°F
Dec 24	62.5°F	63.4°F	63.7°F
Dec 25	62.4°F	63.5°F	63.7°F
Dec 26	62.9°F	64.2°F	64.2°F
Dec 27	63.2°F	64.0°F	64.4°F
Dec 28	63.2°F	63.1°F	64.4°F
Dec 29	63.4°F	64.3°F	64.7°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 65.6°F in Winter, 63.7°F in Spring, 59.5°F in Summer, and 59.0°F in Autumn.