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 12.5°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.

54.5

°F

November 22, 10:37

Trend:

increasing

Yesterday:

54.4°F

Tomorrow:

55.1°F

Sunrise:

05:20

Sunset:

18:14

Day Length:

12 h. 54 min.

San Juan in November

Minimum:

58.4°F

Average:

65.5°F

Maximum:

68.9°F

Sea water temperature in San Juan today

As of now, in San Juan, the water temperature is 54.5°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 6.5°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 rise a bit.

Recent sea temperature and forecast

Today's water temperature is considerably lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 66.9°F on 2016, while the historical minimum was 56.8°F on 2020.

latest data

last year

Observations from the last two weeks indicate that the water temperature was in proximity to the lowest values recorded on those days in the past. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 55.4°F, with minimum temperature starting at 55.1°F, while the maximum might reach 55.7°F.

Daily water temperature in San Juan

Date	Current Year actual* / forecast**	last year	10 years average
Nov 8	57.4°F	58.4°F	59.5°F
Nov 9	57.1°F	58.4°F	59.5°F
Nov 10	56.3°F	58.3°F	59.4°F
Nov 11	56.4°F	58.7°F	59.8°F
Nov 12	57.3°F	58.8°F	59.8°F
Nov 13	58.6°F	59.2°F	60.2°F
Nov 14	57.4°F	58.9°F	60.0°F
Nov 15	58.0°F	60.8°F	60.2°F
Nov 16	57.8°F	61.1°F	60.4°F
Nov 17	57.7°F	61.3°F	60.4°F
Nov 18	57.2°F	63.0°F	60.7°F
Nov 19	57.9°F	62.5°F	60.1°F
Nov 20	54.2°F	62.9°F	59.9°F
Nov 21	54.4°F	64.0°F	60.9°F
Nov 22	54.5°F	64.4°F	61.0°F
Nov 23	55.1°F	64.1°F	61.6°F
Nov 24	55.4°F	63.6°F	61.9°F
Nov 25	55.7°F	63.9°F	62.1°F
Nov 26	55.3°F	61.8°F	61.8°F
Nov 27	55.5°F	63.5°F	62.0°F
Nov 28	55.3°F	63.0°F	61.8°F
Nov 29	55.7°F	63.6°F	62.1°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 58.9°F in Autumn.