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

63.6

°F

May 14, 12:32

Trend:

stable

Yesterday:

63.2°F

Tomorrow:

63.4°F

Sunrise:

07:02

Sunset:

17:40

Day Length:

10 h. 38 min.

Porto Alegre in May

Minimum:

76.8°F

Average:

79.4°F

Maximum:

81.0°F

Sea water temperature in Porto Alegre today

As of now, in Porto Alegre, the water temperature is 63.6°F. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it. Today's reading is 4.0°F lower than the average recorded on this particular day in recent years. Since yesterday, there was a slight increase in temperature. This indicates a warming trend over the past day. 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 minimum temperature for this date. The maximum temperature recorded for this date was 71.4°F on 2018, while the historical minimum was 63.8°F on 2022.

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the minimum recorded over the past years. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 62.3°F, the minimum temperature may reach 61.4°F, and the maximum might stay at 63.4°F.

Daily water temperature in Porto Alegre

Date Current Year

actual* / forecast**

last year 10 years average
Apr 30 70.9°F 71.2°F 71.3°F
May 1 69.8°F 70.6°F 71.0°F
May 2 69.3°F 69.8°F 70.6°F
May 3 69.1°F 69.2°F 70.4°F
May 4 68.5°F 69.9°F 70.1°F
May 5 69.4°F 69.2°F 69.8°F
May 6 67.7°F 70.6°F 70.1°F
May 7 69.0°F 71.2°F 69.8°F
May 8 69.4°F 70.8°F 69.8°F
May 9 68.5°F 70.5°F 69.1°F
May 10 67.2°F 69.8°F 68.5°F
May 11 65.2°F 69.3°F 68.0°F
May 12 63.8°F 68.8°F 67.5°F
May 13 63.2°F 69.3°F 67.5°F
May 14 63.6°F 69.2°F 67.6°F
May 15 63.4°F 69.7°F 67.4°F
May 16 63.0°F 69.7°F 67.0°F
May 17 62.5°F 69.2°F 66.6°F
May 18 62.4°F 69.5°F 66.5°F
May 19 62.1°F 68.6°F 66.1°F
May 20 61.6°F 67.5°F 65.6°F
May 21 61.4°F 67.2°F 65.5°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.