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 22.38°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.

Peru > San Juan

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.

72.3

°F

November 11, 16:50

Trend:

stable

Yesterday:

72.5°F

Tomorrow:

72.4°F

Sunrise:

05:21

Sunset:

18:08

Day Length:

12 h. 47 min.

San Juan in November

Minimum:

58.4°F

Average:

65.2°F

Maximum:

68.9°F

Sea water temperature in San Juan today

As of now, in San Juan, the water temperature is 72.3°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 12.9°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

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 maximum temperature for this date. The maximum temperature recorded for this date was 62.4°F on 2016, while the historical minimum was 56.4°F on 2025.

latest data

last year

Observations from the last two weeks indicate that the water temperature was in proximity to the highest 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 72.8°F, with minimum temperature starting at 72.4°F, while the maximum might reach 73.2°F.

Daily water temperature in San Juan

Date	Current Year actual* / forecast**	last year	10 years average
Oct 28	70.1°F	57.1°F	59.2°F
Oct 29	68.8°F	57.0°F	58.8°F
Oct 30	69.3°F	58.4°F	59.2°F
Oct 31	68.3°F	58.0°F	59.0°F
Nov 1	69.7°F	57.3°F	59.3°F
Nov 2	70.5°F	58.8°F	59.6°F
Nov 3	70.7°F	59.1°F	59.8°F
Nov 4	71.7°F	58.9°F	59.9°F
Nov 5	70.9°F	58.4°F	60.0°F
Nov 6	72.4°F	58.6°F	60.5°F
Nov 7	71.9°F	58.7°F	60.1°F
Nov 8	72.1°F	57.4°F	60.3°F
Nov 9	73.0°F	57.1°F	60.5°F
Nov 10	72.5°F	56.3°F	60.3°F
Nov 11	72.3°F	56.4°F	59.4°F
Nov 12	72.4°F	57.3°F	59.6°F
Nov 13	72.9°F	58.6°F	60.0°F
Nov 14	72.6°F	57.4°F	59.8°F
Nov 15	72.8°F	58.0°F	59.9°F
Nov 16	73.0°F	57.8°F	60.1°F
Nov 17	72.9°F	57.7°F	60.1°F
Nov 18	73.2°F	57.2°F	60.4°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 November 9, 2026, reaching a 73.0°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, 59.8°F in Summer, and 59.2°F in Autumn.