Although the weather on the day I visited was having small raining, but it did not affect the entire activities. I’d enjoyed and highly recommended for this TSS Cruise.
Anonymous User
Solo traveler
south island Weather, Climate and Best Time to Visit
Data source:Meteostat Update date:2025-09
south island year round climate
Spring (March–May): Average 8.1–13.7°C, cool and rainy with occasional warm sunshine. Common activities: Hiking, flower viewing (e.g., some hardy flowers). Recommended clothing: Waterproof jacket, warm layers, comfortable hiking boots.
Summer (June–August): Average 5.9–6.3°C, cold and damp with high rainfall, especially in July. Common activities: Indoor activities, museum visits, onsen experiences. Recommended clothing: Warm waterproof jacket, sweaters, long pants, waterproof shoes.
Autumn (September–November): Average 9.0–13.0°C, gradually warming with less rainfall. Common activities: Hiking, exploring nature. Recommended clothing: Light jacket, long pants, comfortable shoes.
Winter (December–February): Average 15.2–16.4°C, mild with moderate rainfall. Common activities: Outdoor activities, beach walks (weather permitting). Recommended clothing: Light jacket, long pants, comfortable shoes.
south island climatological average
Annual average temperature: approx. 10.9°C / Annual rainfall: approx. 801 mm / Summer humidity: 60%–70% / Rainiest month: July
south island monthly average temperature and precipitation
Month
Air temperature (°C)
Precipitation (mm)
January
16.4°C
42
February
15.6°C
71.7
March
13.7°C
66.1
April
11.2°C
49
May
8.1°C
45.1
June
6.1°C
54.1
July
5.9°C
142.3
August
6.3°C
60.8
September
9°C
55
October
10.6°C
79.1
November
13°C
73.5
December
15.2°C
63.1
south island weather for the next seven days
11/25
Tuesday
Partly Cloudy
15.2°C/5.3°C
11/26
Wednesday
Patchy rain nearby
18.7°C/10.7°C
11/27
Thursday
Patchy rain nearby
18°C/7.5°C
11/28
Friday
Patchy rain nearby
15.9°C/5.1°C
11/29
Saturday
Sunny
17°C/4.3°C
11/30
Sunday
Patchy rain nearby
11.8°C/5.5°C
12/1
Monday
Partly Cloudy
15.3°C/4.8°C
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