Parts of New Zealand’s South Island are facing a wet and windy day, with MetService issuing severe weather watches and warnings for heavy rain and severe northwest gales as an active front moves across the region. For the latest official advisory areas and timing, check the live MetService Warnings & Watches.

Fiordland: 100–150mm possible, rapid river rises

In Fiordland, MetService says around 100mm to 150mm of rain could fall during the day, with peak rainfall rates reaching 20–30mm per hour at times. That kind of intensity can quickly overwhelm local catchments.

The key risks are fast-rising streams and rivers, surface flooding, slips, and difficult driving conditions — especially on steep, exposed roads and near waterways.

Otago headwaters: heaviest near the Main Divide

In the headwaters of Otago lakes and rivers, heavier totals are expected closer to the Main Divide: 120–160mm about the divide, and 70–100mm within about 20km further east. Peak rates of 20–30mm per hour are also possible near the divide, which increases the chance of sudden runoff and river level jumps.

Practical prep tips remain simple but effective: clear drains and gutters, avoid low-lying areas, and drive cautiously if visibility drops or water begins to pool on roads.

It’s an active start to the week, particularly for the western South Island as a cold front pushes its way up the country today and tomorrow, bringing periods of heavy rain 🌧️ and gale northwesterlies 💨.

Strong Wind and Heavy Rain Warnings & Watches are in place for the South… pic.twitter.com/8pvaf793NO

— MetService NZ (@MetService) December 14, 2025

Queenstown Lakes: strong wind watch, exposed places most at risk

A strong wind watch covers the Queenstown Lakes, Central Otago and inland areas of Southland, Clutha and Dunedin, where north to northwest winds may approach severe gale in exposed places before easing later in the afternoon.

MetService notes gusts up to 120km/h are possible in exposed areas, which can bring down branches, affect powerlines, and cause issues for unsecured outdoor items.

Travel: what to watch for today

If you’re driving through the lower South Island, be ready for rapidly changing conditions: debris on roads, temporary flooding, and strong crosswinds on open stretches. For state-highway travel updates and alerts, use NZTA traffic & travel information before heading out.

Quick checklist: Bring devices inside or secure outdoor furniture, keep torches/power banks ready, clear gutters, and avoid river edges during heavy bursts. If you must travel, slow down and expect sudden wind gusts.

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Written by Swikblog Desk