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

58.7

°F

June 25, 14:54

Trend:

stable

Yesterday:

58.7°F

Tomorrow:

58.5°F

Sunrise:

07:21

Sunset:

17:34

Day Length:

10 h. 13 min.

Porto Alegre in July

Minimum:

76.6°F

Average:

79.2°F

Maximum:

81.5°F

Sea water temperature in Porto Alegre today

As of now, in Porto Alegre, the water temperature is 58.7°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 2.5°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 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 also aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 66.5°F on 2020, while the historical minimum was 55.0°F on 2016.

Over the past two weeks, the water temperature has closely aligned with historical averages for those days. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 58.0°F, the minimum temperature may reach 57.3°F, and the maximum might stay at 58.5°F.

Daily water temperature in Porto Alegre

Date Current Year

actual* / forecast**

last year 10 years average
Jun 11 63.8°F 61.3°F 62.6°F
Jun 12 63.0°F 60.0°F 62.4°F
Jun 13 63.1°F 60.1°F 62.3°F
Jun 14 63.0°F 59.4°F 62.1°F
Jun 15 63.0°F 59.6°F 62.0°F
Jun 16 62.2°F 60.2°F 61.8°F
Jun 17 61.5°F 59.2°F 61.5°F
Jun 18 61.3°F 59.1°F 61.3°F
Jun 19 60.6°F 59.1°F 61.1°F
Jun 20 60.4°F 59.2°F 61.0°F
Jun 21 59.6°F 59.6°F 61.0°F
Jun 22 58.6°F 60.4°F 60.9°F
Jun 23 59.2°F 60.5°F 60.9°F
Jun 24 58.7°F 60.5°F 60.8°F
Jun 25 58.7°F 59.9°F 61.2°F
Jun 26 58.5°F 60.1°F 61.0°F
Jun 27 58.3°F 59.8°F 60.8°F
Jun 28 58.4°F 59.1°F 60.9°F
Jun 29 58.2°F 59.0°F 60.7°F
Jun 30 58.0°F 58.9°F 60.5°F
Jul 1 57.6°F 58.5°F 60.1°F
Jul 2 57.3°F 58.0°F 59.8°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, 73.3°F in Spring, 60.7°F in Summer, and 68.9°F in Autumn.