South Island Weather Forecast
South Island weather: 40°F, overcast. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
Risk assessment for South Island
Derived from the current forecast window - not an official warning.
Peak gusts of 42 mph and 0 thunderstorm days in the next 16 days.
Wettest single day forecast at 1,0 in, 2,2 in across the window. Flash flooding risk rises sharply above 50 mm in a day.
Active alerts for South Island
Derived from the forecast. No official alert feed is wired for this country yet.
16-day forecast for South Island
Daily highs and lows, precipitation and UV.
| Day | Conditions | High / Low | Precip | Wind | UV |
|---|---|---|---|---|---|
| Sat, Oct 3 | ☁️ Overcast | 48° / 38° | 51% | 7 mph | 2 |
| Sun, Oct 4 | ☁️ Overcast | 55° / 33° | 0% | 7 mph | 6 |
| Mon, Oct 5 | ⛅ Partly cloudy | 58° / 38° | 0% | 11 mph | 6 |
| Tue, Oct 6 | ☁️ Overcast | 56° / 35° | 0% | 10 mph | 6 |
| Wed, Oct 7 | 🌦️ Light drizzle | 56° / 41° | 51% · 0,0 in | 11 mph | 4 |
| Thu, Oct 8 | 🌦️ Light drizzle | 51° / 39° | 42% · 0,1 in | 8 mph | 3 |
| Fri, Oct 9 | ☁️ Overcast | 59° / 38° | 10% | 7 mph | 7 |
| Sat, Oct 10 | 🌦️ Light rain | 57° / 41° | 14% · 0,3 in | 13 mph | 6 |
| Sun, Oct 11 | 🌧️ Rain | 54° / 40° | 25% · 1,0 in | 19 mph | 5 |
| Mon, Oct 12 | ⛅ Partly cloudy | 56° / 33° | 22% | 9 mph | 6 |
| Tue, Oct 13 | ⛅ Partly cloudy | 56° / 35° | 32% | 13 mph | 7 |
| Wed, Oct 14 | 🌦️ Light showers | 54° / 41° | 41% · 0,5 in | 11 mph | 5 |
| Thu, Oct 15 | 🌦️ Light showers | 50° / 37° | 27% · 0,3 in | 9 mph | 7 |
| Fri, Oct 16 | ⛅ Partly cloudy | 52° / 37° | 17% | 4 mph | 7 |
| Sat, Oct 17 | ☁️ Overcast | 58° / 37° | 27% | 11 mph | 7 |
| Sun, Oct 18 | ☀️ Clear sky | -- / -- | 30% | -- | — |
What this means for South Island
Today is slightly cooler than average for October. The forecast high of 48°F is 4.7°F below the 52°F typical for this month.
A 51% chance means rain is likely somewhere nearby at some point - carry a layer, but do not cancel.
No weather-related travel disruption is expected today. Roads and airports should run normally.
Southern Hemisphere, so peak summer falls in December to February.
The gap between the warmest and coldest month averages 54°F.
See the South Island forecast by time range
South Island weather - more answers
Explore South Island
Every topic we hold for this place, and the same topic for the places around it.
Weather for related places
Frequently asked questions
Where is South Island?
South Island is an island in New Zealand. Its coordinates are -43.9535, 170.5. It lies in Oceania.
What is the weather like in South Island right now?
It is currently 40°F (5°C) with overcast. Humidity is 97% and wind is 4 mph.
When is the best time to visit South Island?
February offer the most comfortable conditions in South Island, which has a subarctic climate. June, July and October are usually the hardest months for outdoor plans.
What time zone is South Island in?
South Island observes Pacific/Auckland (UTC+13:00). The local time is 7:41 AM.
What is the nearest airport to South Island?
The closest airports are Queenstown Airport (ZQN), 114 mi away.
What are the top things to do in South Island?
Popular options include Aoraki / Mount Cook, Lake Wakatipu, Te Wahipounamu - South West New Zealand, Milford Sound and Fiordland National Park.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (islands) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated October 3, 2026 at 7:41 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
