Haeju — Water Temperature in December
Water Temperature Range
2°C
minimum
8°C
average
13°C
maximum
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 | 2025 | 2024 | 2023 | 2022 |
|---|---|---|---|---|
| DEC 1 | 11°C | 11°C | 11°C | 11°C |
| DEC 2 | 11°C | 11°C | 11°C | 10°C |
| DEC 3 | 11°C | 11°C | 11°C | 10°C |
| DEC 4 | 11°C | 11°C | 11°C | 10°C |
| DEC 5 | 11°C | 11°C | 11°C | 10°C |
| DEC 6 | 10°C | 10°C | 10°C | 9°C |
| DEC 7 | 10°C | 10°C | 10°C | 9°C |
| DEC 8 | 10°C | 10°C | 10°C | 8°C |
| DEC 9 | 10°C | 9°C | 10°C | 10°C |
| DEC 10 | 10°C | 10°C | 9°C | 10°C |
| DEC 11 | 9°C | 9°C | 9°C | 9°C |
| DEC 12 | 9°C | 9°C | 9°C | 8°C |
| DEC 13 | 9°C | 9°C | 9°C | 8°C |
| DEC 14 | 8°C | 9°C | 9°C | 7°C |
| DEC 15 | 9°C | 9°C | 9°C | 8°C |
| DEC 16 | 9°C | 9°C | 9°C | 8°C |
| DEC 17 | 8°C | 8°C | 9°C | 8°C |
| DEC 18 | 8°C | 8°C | 8°C | 8°C |
| DEC 19 | 8°C | 8°C | 8°C | 8°C |
| DEC 20 | 8°C | 7°C | 8°C | 8°C |
| DEC 21 | 8°C | 8°C | 8°C | 8°C |
| DEC 22 | 8°C | 8°C | 8°C | 8°C |
| DEC 23 | 8°C | 8°C | 8°C | 7°C |
| DEC 24 | 7°C | 7°C | 8°C | 6°C |
| DEC 25 | 7°C | 7°C | 7°C | 6°C |
| DEC 26 | 7°C | 7°C | 7°C | 6°C |
| DEC 27 | 7°C | 7°C | 7°C | 6°C |
| DEC 28 | 6°C | 7°C | 7°C | 5°C |
| DEC 29 | 6°C | 6°C | 7°C | 5°C |
| DEC 30 | 6°C | 6°C | 6°C | 6°C |
| DEC 31 | 6°C | 6°C | 6°C | 6°C |
December: Climate and Swimming Opportunities
Average Night Air Temperature
-4°C
Average Day Air Temperature
11°C
Precipitation Amount per Month
23 mm
Number of Rainy Days
8
Daylight per Day
9 hrs
Sunshine per Day
5 hrs
Average Wind Speed
8 km/h
Average Humidity
68%
At such water and air temperatures, swimming feels icy and can be a shock to the body. If you go in at all, keep it extremely short and warm up immediately afterward.