Guaiba — Water Temperature in May

Water Temperature Range

15°C

minimum

21°C

average

24°C

maximum

Get instant access to real-time water temperatures for this and all other locations with our iOS and Android apps.

Water Temperature Chart for Month

The chart shows the average daily water temperature for each day of the month based on historical data.

Table of Water Temperatures by Day of the Month for Previous Years

Day	2026	2025	2024	2023
MAY 1	-10°C	22°C	21°C	23°C
MAY 2	21°C	22°C	21°C	22°C
MAY 3	21°C	22°C	20°C	22°C
MAY 4	20°C	22°C	20°C	22°C
MAY 5	20°C	21°C	19°C	21°C
MAY 6	20°C	21°C	19°C	22°C
MAY 7	20°C	22°C	20°C	23°C
MAY 8	21°C	21°C	20°C	21°C
MAY 9	21°C	21°C	20°C	21°C
MAY 10	21°C	21°C	20°C	21°C
MAY 11	21°C	21°C	20°C	22°C
MAY 12	19°C	22°C	21°C	21°C
MAY 13	19°C	21°C	20°C	20°C
MAY 14	17°C	21°C	19°C	21°C
MAY 15	17°C	21°C	20°C	20°C
MAY 16	16°C	21°C	19°C	20°C
MAY 17	17°C	21°C	18°C	20°C
MAY 18	16°C	21°C	19°C	20°C
MAY 19	16°C	21°C	19°C	20°C
MAY 20	16°C	20°C	19°C	19°C
MAY 21	16°C	20°C	20°C	19°C
MAY 22	16°C	20°C	20°C	20°C
MAY 23	16°C	20°C	19°C	19°C
MAY 24	16°C	20°C	19°C	19°C
MAY 25	16°C	20°C	18°C	20°C
MAY 26	16°C	20°C	19°C	19°C
MAY 27	16°C	20°C	18°C	19°C
MAY 28	16°C	19°C	18°C	18°C
MAY 29	16°C	19°C	19°C	18°C
MAY 30	16°C	20°C	20°C	18°C
MAY 31	16°C	19°C	18°C	17°C

May: Climate and Swimming Opportunities

Average Night Air Temperature

9°C

Average Day Air Temperature

22°C

Precipitation Amount per Month

149 mm

Number of Rainy Days

Daylight per Day

11 hrs

Sunshine per Day

5 hrs

Average Wind Speed

8 km/h

Average Humidity

83%

With such a ratio between the average monthly temperatures of water and air, swimming feels warm and comfortable even if the day isn’t hot. The water can feel warmer than the air, so getting out may feel a bit cool.