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

77.9

°F

April 8, 10:15

Trend:

decreasing

Yesterday:

78.9°F

Tomorrow:

77.6°F

Sunrise:

06:40

Sunset:

18:14

Day Length:

11 h. 34 min.

Porto Alegre in April

Minimum:

76.9°F

Average:

79.7°F

Maximum:

82.0°F

Sea water temperature in Porto Alegre today

As of now, in Porto Alegre, the water temperature is 77.9°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 2.7°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 fall 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 maximum temperature for this date. The maximum temperature recorded for this date was 76.9°F on 2019, while the historical minimum was 73.2°F on 2022.

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 shows a gradual cooling trend. The average temperature is expected to be 77.1°F, the minimum temperature may reach 76.3°F, and the maximum might stay at 77.6°F.

Daily water temperature in Porto Alegre

Date Current Year

actual* / forecast**

last year 10 years average
Mar 25 80.1°F 79.6°F 78.2°F
Mar 26 79.2°F 79.7°F 77.8°F
Mar 27 78.7°F 79.5°F 77.5°F
Mar 28 80.7°F 78.8°F 77.3°F
Mar 29 79.6°F 78.6°F 77.1°F
Mar 30 81.7°F 79.1°F 77.6°F
Mar 31 81.6°F 79.7°F 77.8°F
Apr 1 80.9°F 78.7°F 77.8°F
Apr 2 79.7°F 77.2°F 77.2°F
Apr 3 80.4°F 77.0°F 77.0°F
Apr 4 80.2°F 76.7°F 76.8°F
Apr 5 78.4°F 76.9°F 76.3°F
Apr 6 77.8°F 75.1°F 75.9°F
Apr 7 78.9°F 74.3°F 75.9°F
Apr 8 77.9°F 73.4°F 75.2°F
Apr 9 77.6°F 73.3°F 74.9°F
Apr 10 77.5°F 72.8°F 74.8°F
Apr 11 77.3°F 72.4°F 74.6°F
Apr 12 77.6°F 74.0°F 74.9°F
Apr 13 77.1°F 73.1°F 74.4°F
Apr 14 76.6°F 72.9°F 73.9°F
Apr 15 76.3°F 73.3°F 73.6°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 152 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 79.3°F in Winter, 73.4°F in Spring, 60.7°F in Summer, and 68.9°F in Autumn.