Greymouth — Water Temperature in May

Water Temperature Range

13°C

minimum

15°C

average

18°C

maximum

Water Temperature Chart for May

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

Climate and Swimming Opportunities in Greymouth in May

Average Day Air Temperature

13°C

Average Night Air Temperature

6°C

Precipitation Amount per Month

58 mm

Number of Rainy Days

Daylight per Day

9 hrs

Sunshine per Day

4 hrs

Average Wind Speed

16 km/h

Average Humidity

84%

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.