Boryeong — Water Temperature in May

Water Temperature Range

9°C

minimum

14°C

average

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

May: Climate and Swimming Opportunities

Average Night Air Temperature

14°C

Average Day Air Temperature

25°C

Precipitation Amount per Month

59 mm

Number of Rainy Days

Daylight per Day

14 hrs

Sunshine per Day

8 hrs

Average Wind Speed

15 km/h

Average Humidity

66%

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.