Cassino Beach — Water Temperature in May

Water Temperature Range

14°C

minimum

18°C

average

22°C

maximum

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

At such water and air temperatures, swimming feels cool and invigorating. It’s comfortable for a quick dip, and you’ll feel fine as long as you warm up soon after.

Water Temperature in Nearby Locations

Rio Grande