What is the current water temperature in San Juan?

As of now, in San Juan, the water temperature is 27.75°C. It's safe to say that the water is comfortably warm for various water-related activities.

Puerto Rico > 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.

82.0

°F

May 3, 14:11

Trend:

increasing

Yesterday:

81.8°F

Tomorrow:

82.0°F

Sunrise:

05:56

Sunset:

18:47

Day Length:

12 h. 51 min.

San Juan in May

Minimum:

80.5°F

Average:

81.1°F

Maximum:

81.9°F

Sea water temperature in San Juan today

As of now, in San Juan, the water temperature is 82.0°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 1.4°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 stay about the same.

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 81.7°F on 2023, while the historical minimum was 79.6°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. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 82.3°F, with minimum temperature starting at 82.0°F, while the maximum might reach 82.5°F.

Daily water temperature in San Juan

Date	Current Year actual* / forecast**	last year	10 years average
Apr 19	80.9°F	81.2°F	80.5°F
Apr 20	80.9°F	81.2°F	80.5°F
Apr 21	80.9°F	81.0°F	80.5°F
Apr 22	80.8°F	80.7°F	80.4°F
Apr 23	80.6°F	80.8°F	80.5°F
Apr 24	80.7°F	81.3°F	80.6°F
Apr 25	80.8°F	81.5°F	80.7°F
Apr 26	81.0°F	81.3°F	80.7°F
Apr 27	81.4°F	81.2°F	80.7°F
Apr 28	81.1°F	81.0°F	80.8°F
Apr 29	81.5°F	81.3°F	80.9°F
Apr 30	81.7°F	81.4°F	80.9°F
May 1	81.9°F	81.6°F	80.8°F
May 2	81.8°F	81.4°F	80.7°F
May 3	82.0°F	81.2°F	80.6°F
May 4	82.0°F	80.8°F	80.6°F
May 5	82.3°F	81.2°F	80.9°F
May 6	82.3°F	81.3°F	80.9°F
May 7	82.3°F	81.1°F	81.0°F
May 8	82.5°F	81.5°F	81.1°F
May 9	82.4°F	82.0°F	81.1°F
May 10	82.5°F	82.1°F	81.1°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 San Juan, the water temperature is comfortable for swimming all year round.

The warmest water in San Juan was recorded on September 24, 2024, reaching a 87.7°F. While the coldest temperature occurred on February 16, 2018, dipping to 78.1°F. The average readings by season are 81.1°F in Winter, 80.5°F in Spring, 83.4°F in Summer, and 84.7°F in Autumn.