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

58.2

°F

August 2, 12:39

Trend:

stable

Yesterday:

58.6°F

Tomorrow:

58.6°F

Sunrise:

07:10

Sunset:

17:53

Day Length:

10 h. 43 min.

Porto Alegre in August

Minimum:

76.7°F

Average:

78.9°F

Maximum:

81.2°F

Sea water temperature in Porto Alegre today

As of now, in Porto Alegre, the water temperature is 58.2°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is 1.7°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 rise a bit.

Recent sea temperature and forecast

Today's water temperature is slightly 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 62.4°F on 2015, while the historical minimum was 56.2°F on 2021.

Over the last two weeks, the water temperature has stayed slightly lower than historical averages for those days. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 59.2°F, with minimum temperature starting at 58.6°F, while the maximum might reach 59.9°F.

Daily water temperature in Porto Alegre

Date Current Year

actual* / forecast**

last year 10 years average
Jul 19 57.9°F 56.8°F 59.3°F
Jul 20 57.7°F 58.1°F 59.6°F
Jul 21 58.0°F 58.4°F 59.9°F
Jul 22 57.6°F 59.2°F 59.8°F
Jul 23 58.6°F 59.3°F 59.7°F
Jul 24 58.7°F 60.2°F 59.8°F
Jul 25 59.1°F 61.9°F 60.2°F
Jul 26 59.4°F 61.2°F 60.2°F
Jul 27 59.3°F 60.9°F 60.4°F
Jul 28 59.1°F 60.6°F 60.0°F
Jul 29 58.8°F 60.4°F 59.9°F
Jul 30 59.0°F 60.2°F 59.8°F
Jul 31 58.4°F 60.0°F 59.7°F
Aug 1 58.6°F 60.3°F 59.7°F
Aug 2 58.2°F 61.6°F 59.9°F
Aug 3 58.6°F 62.7°F 60.2°F
Aug 4 58.7°F 62.6°F 60.4°F
Aug 5 58.9°F 62.7°F 60.5°F
Aug 6 59.0°F 62.7°F 60.7°F
Aug 7 59.5°F 62.6°F 61.2°F
Aug 8 59.8°F 62.8°F 61.5°F
Aug 9 59.9°F 61.7°F 61.6°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 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, 61.0°F in Summer, and 68.7°F in Autumn.