Raglan — Water Temperature in December

Water Temperature Range

16°C

minimum

20°C

average

23°C

maximum

Water Temperature Chart for December

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

	2025	2024	2023	2022
DEC 1	18°C	18°C	18°C	17°C
DEC 2	18°C	18°C	18°C	17°C
DEC 3	18°C	18°C	18°C	17°C
DEC 4	17°C	17°C	17°C	16°C
DEC 5	18°C	18°C	18°C	17°C
DEC 6	18°C	18°C	18°C	17°C
DEC 7	18°C	18°C	19°C	17°C
DEC 8	18°C	18°C	18°C	18°C
DEC 9	18°C	18°C	18°C	18°C
DEC 10	19°C	19°C	19°C	18°C
DEC 11	18°C	18°C	19°C	17°C
DEC 12	19°C	19°C	19°C	18°C
DEC 13	18°C	18°C	18°C	18°C
DEC 14	18°C	18°C	18°C	17°C
DEC 15	18°C	18°C	18°C	18°C
DEC 16	18°C	18°C	18°C	18°C
DEC 17	18°C	18°C	19°C	17°C
DEC 18	18°C	18°C	19°C	17°C
DEC 19	19°C	19°C	19°C	18°C
DEC 20	19°C	19°C	19°C	18°C
DEC 21	18°C	18°C	18°C	18°C
DEC 22	18°C	18°C	18°C	18°C
DEC 23	19°C	19°C	18°C	19°C
DEC 24	19°C	19°C	18°C	19°C
DEC 25	19°C	19°C	19°C	18°C
DEC 26	19°C	19°C	18°C	19°C
DEC 27	19°C	19°C	19°C	19°C
DEC 28	19°C	19°C	19°C	19°C
DEC 29	19°C	19°C	18°C	19°C
DEC 30	19°C	19°C	19°C	19°C
DEC 31	20°C	20°C	20°C	19°C

Climate and Swimming Opportunities in Raglan in December

Average Day Air Temperature

21°C

Average Night Air Temperature

14°C

Precipitation Amount per Month

123 mm

Number of Rainy Days

Daylight per Day

14 hrs

Sunshine per Day

7 hrs

Average Wind Speed

21 km/h

Average Humidity

75%

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.