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 17.47°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

May 8, 06:41

Trend:

stable

Yesterday:

64.0°F

Tomorrow:

63.6°F

Sunrise:

06:13

Sunset:

17:41

Day Length:

11 h. 28 min.

San Juan in May

Minimum:

60.3°F

Average:

64.9°F

Maximum:

68.6°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 2.1°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 rise a bit.

Recent sea temperature and forecast

The water temperature today is above average for the last two weeks, showing a small increase in temperature. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 64.6°F on 2017, while the historical minimum was 57.0°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 maximum recorded over the past years. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 63.6°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
Apr 24	62.8°F	61.4°F	62.6°F
Apr 25	63.0°F	59.3°F	62.4°F
Apr 26	63.9°F	57.9°F	62.3°F
Apr 27	62.9°F	58.6°F	62.0°F
Apr 28	62.5°F	59.2°F	61.8°F
Apr 29	63.3°F	57.5°F	61.5°F
Apr 30	62.9°F	58.6°F	61.7°F
May 1	62.0°F	59.6°F	61.6°F
May 2	62.6°F	60.0°F	61.3°F
May 3	62.6°F	58.0°F	61.4°F
May 4	61.6°F	60.6°F	61.7°F
May 5	62.4°F	59.7°F	61.5°F
May 6	62.7°F	60.0°F	61.9°F
May 7	64.0°F	60.0°F	61.9°F
May 8	63.4°F	59.3°F	61.4°F
May 9	63.6°F	58.6°F	61.6°F
May 10	63.6°F	58.6°F	61.6°F
May 11	63.8°F	58.8°F	61.8°F
May 12	63.8°F	58.8°F	61.7°F
May 13	63.4°F	59.1°F	61.3°F
May 14	63.5°F	59.3°F	61.4°F
May 15	63.4°F	59.8°F	61.3°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 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.