All data are in degrees Fahrenheit

en

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

70.5

°F

May 9, 18:37

Trend:

decreasing

Yesterday:

70.8°F

Tomorrow:

70.1°F

Sunrise:

06:59

Sunset:

17:44

Day Length:

10 h. 45 min.

Porto Alegre in May

Minimum:

76.8°F

Average:

79.2°F

Maximum:

81.0°F

Sea water temperature in Porto Alegre today

As of now, in Porto Alegre, the water temperature is 70.5°F. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool. Today's reading is 1.6°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 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 72.4°F on 2018, while the historical minimum was 64.9°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 69.3°F, the minimum temperature may reach 68.5°F, and the maximum might stay at 70.1°F.

Daily water temperature in Porto Alegre

Date Current Year

actual* / forecast**

last year 10 years average
Apr 25 72.0°F 72.4°F 72.3°F
Apr 26 72.7°F 72.3°F 72.4°F
Apr 27 72.2°F 72.1°F 72.2°F
Apr 28 72.1°F 72.8°F 71.9°F
Apr 29 72.1°F 72.2°F 71.8°F
Apr 30 71.2°F 71.6°F 71.2°F
May 1 70.6°F 71.2°F 70.9°F
May 2 69.8°F 70.8°F 70.6°F
May 3 69.2°F 70.4°F 70.4°F
May 4 69.9°F 70.1°F 70.1°F
May 5 69.2°F 69.7°F 69.7°F
May 6 70.6°F 70.6°F 70.1°F
May 7 71.2°F 69.5°F 69.7°F
May 8 70.8°F 70.2°F 69.6°F
May 9 70.5°F 69.8°F 68.8°F
May 10 70.1°F 69.2°F 68.5°F
May 11 69.8°F 68.9°F 68.2°F
May 12 69.5°F 68.6°F 67.8°F
May 13 69.4°F 68.5°F 67.7°F
May 14 69.0°F 68.1°F 67.4°F
May 15 68.8°F 67.3°F 67.2°F
May 16 68.5°F 66.8°F 66.8°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 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 June 20, 2016, dipping to 55.0°F. The average readings by season are 79.1°F in Winter, 73.3°F in Spring, 61.1°F in Summer, and 68.7°F in Autumn.