All data are in degrees Fahrenheit

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Water temperature in Porto Alegre

Detailed information about the current water temperature in Porto Alegre. 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.
Sea temperature in Porto Alegre now

76.9

°F

December 26, 16:08

Trend:

decreasing

Yesterday:

77.2°F

Tomorrow:

76.8°F

Sunrise:

06:23

Sunset:

20:28

Day Length:

14 h. 5 min.

Porto Alegre in January

Minimum:

76.8°F

Average:

79.2°F

Maximum:

84.0°F

Sea water temperature in Porto Alegre today

As of now, in Porto Alegre, the water temperature is 76.9°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 1.0°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 stay about the same.

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 also aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 80.5°F on 2023, while the historical minimum was 74.3°F on 2015.

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 77.5°F, with minimum temperature starting at 76.8°F, while the maximum might reach 78.2°F.

Daily water temperature in Porto Alegre

Date Current Year

actual* / forecast**

last year 10 years average
Jan 1 78.2°F 77.3°F 79.2°F
Jan 2 78.1°F 77.1°F 79.0°F
Dec 12 78.7°F 75.1°F 76.8°F
Dec 13 78.4°F 75.4°F 77.3°F
Dec 14 79.9°F 76.0°F 77.3°F
Dec 15 80.0°F 76.5°F 77.3°F
Dec 16 80.9°F 74.8°F 77.3°F
Dec 17 79.3°F 75.0°F 77.4°F
Dec 18 78.0°F 74.8°F 77.6°F
Dec 19 78.7°F 75.8°F 77.5°F
Dec 20 79.7°F 76.0°F 77.7°F
Dec 21 79.0°F 78.0°F 77.7°F
Dec 22 78.6°F 78.0°F 77.7°F
Dec 23 78.1°F 77.0°F 77.6°F
Dec 24 77.7°F 76.7°F 77.7°F
Dec 25 77.2°F 76.6°F 77.7°F
Dec 26 76.9°F 77.1°F 77.8°F
Dec 27 76.8°F 77.4°F 77.7°F
Dec 28 76.8°F 77.8°F 77.8°F
Dec 29 77.4°F 77.8°F 78.3°F
Dec 30 77.3°F 78.4°F 78.3°F
Dec 31 78.0°F 77.5°F 78.9°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 Porto Alegre by month

In Porto Alegre, the months December through April offer comfortable swimming conditions, which amounts to 151 swimming days.
The warmest water in Porto Alegre was recorded on March 5, 2025, reaching a 86.6°F. While the coldest temperature occurred on July 5, 2025, dipping to 54.7°F. The average readings by season are 79.1°F in Winter, 73.3°F in Spring, 60.9°F in Summer, and 68.8°F in Autumn.