Saint-Gilles-Croix-de-Vie — Water Temperature in May

Water Temperature Range

12°C

minimum

15°C

average

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

May: Climate and Swimming Opportunities

Average Night Air Temperature

11°C

Average Day Air Temperature

20°C

Precipitation Amount per Month

56 mm

Number of Rainy Days

Daylight per Day

15 hrs

Sunshine per Day

7 hrs

Average Wind Speed

18 km/h

Average Humidity

78%

With such a ratio between the average monthly temperatures of water and air, swimming feels very cold and is only for cold-water enthusiasts. Most people will prefer just a brief splash, because warming up afterward can take time.