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

76.4

°F

April 16, 11:19

Trend:

decreasing

Yesterday:

76.5°F

Tomorrow:

75.9°F

Sunrise:

06:45

Sunset:

18:05

Day Length:

11 h. 20 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 76.4°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 3.3°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 76.2°F on 2019, while the historical minimum was 69.5°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 75.3°F, the minimum temperature may reach 74.8°F, and the maximum might stay at 75.9°F.

Daily water temperature in Porto Alegre

Date Current Year

actual* / forecast**

last year 10 years average
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 75.4°F
Apr 9 77.3°F 73.3°F 75.1°F
Apr 10 75.9°F 72.8°F 74.9°F
Apr 11 74.8°F 72.4°F 74.6°F
Apr 12 75.5°F 74.0°F 74.9°F
Apr 13 75.9°F 73.1°F 74.6°F
Apr 14 76.2°F 72.9°F 74.1°F
Apr 15 76.5°F 73.3°F 73.9°F
Apr 16 76.4°F 73.6°F 73.1°F
Apr 17 75.9°F 73.4°F 72.6°F
Apr 18 75.6°F 73.3°F 72.2°F
Apr 19 75.1°F 72.9°F 71.8°F
Apr 20 74.8°F 72.7°F 71.4°F
Apr 21 74.9°F 72.9°F 71.6°F
Apr 22 75.2°F 72.4°F 71.9°F
Apr 23 75.3°F 71.7°F 71.9°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 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.