Oamaru — Water Temperature in May

Water Temperature Range

9°C

minimum

12°C

average

15°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

	2026	2025	2024	2023
MAY 1	13°C	14°C	13°C	12°C
MAY 2	13°C	14°C	13°C	13°C
MAY 3	13°C	13°C	13°C	13°C
MAY 4	13°C	13°C	13°C	13°C
MAY 5	13°C	13°C	13°C	13°C
MAY 6	13°C	13°C	14°C	13°C
MAY 7	13°C	13°C	13°C	12°C
MAY 8	13°C	13°C	13°C	12°C
MAY 9	13°C	13°C	13°C	12°C
MAY 10	13°C	13°C	13°C	12°C
MAY 11	13°C	13°C	13°C	12°C
MAY 12	13°C	12°C	13°C	12°C
MAY 13	13°C	12°C	13°C	12°C
MAY 14	13°C	13°C	13°C	12°C
MAY 15	-	12°C	13°C	12°C
MAY 16	-	12°C	13°C	12°C
MAY 17	-	12°C	13°C	12°C
MAY 18	-	13°C	12°C	13°C
MAY 19	-	13°C	13°C	12°C
MAY 20	-	12°C	12°C	12°C
MAY 21	-	13°C	13°C	12°C
MAY 22	-	12°C	12°C	12°C
MAY 23	-	12°C	12°C	12°C
MAY 24	-	12°C	13°C	12°C
MAY 25	-	12°C	12°C	11°C
MAY 26	-	12°C	12°C	12°C
MAY 27	-	12°C	12°C	12°C
MAY 28	-	12°C	12°C	12°C
MAY 29	-	12°C	12°C	12°C
MAY 30	-	12°C	12°C	12°C
MAY 31	-	12°C	12°C	12°C

Climate and Swimming Opportunities in Oamaru in May

Average Day Air Temperature

13°C

Average Night Air Temperature

2°C

Precipitation Amount per Month

78 mm

Number of Rainy Days

Daylight per Day

9 hrs

Sunshine per Day

3 hrs

Average Wind Speed

11 km/h

Average Humidity

80%

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.