New Zealand flood information / Wellington
Wellington regional guide
Flood protection in Wellington
Flood risk across Wellington ranges from fast urban runoff and short coastal streams to major rivers such as Te Awa Kairangi/Hutt, Ōtaki, Waikanae and Ruamāhanga. Steep terrain, constrained valleys, high tides and stormwater capacity can combine.
Representative regional image: russellstreet, via Wikimedia Commons. Licence and full attribution details are provided on the linked source page.
Understanding flood risk in Wellington
Wellington city, the Hutt Valley, Kāpiti, Porirua and Wairarapa need different plans. Some urban flood information is held by city or district councils rather than Greater Wellington.
Fast urban runoff in steep or constrained catchments
Confirm site-specific exposure through council mapping, local observations and qualified advice where required.
Major rivers across Hutt, Kāpiti and Wairarapa
Confirm site-specific exposure through council mapping, local observations and qualified advice where required.
Coastal water levels, slips and transport disruption
Confirm site-specific exposure through council mapping, local observations and qualified advice where required.
Use both regional river information and the relevant city or district council mapping. Check basement ramps, steep driveways, retaining walls, culverts and whether high tide can slow drainage.
Planning for people, places and continuity
Schools and early learning
Include hillside runoff, nearby streams, slips and transport routes. Protecting buildings must not interfere with safe student evacuation or emergency access.
Iwi, marae and community facilities
Marae and community facilities should identify whānau gathering needs, safe routes, stream or coastal exposure and priorities for kitchens, services, records and taonga.
Councils, businesses and organisations
Government, ports, retail and office facilities should prioritise basements, loading docks, plant rooms, data systems and continuity when roads or rail are disrupted.
Official Wellington flood information
Use official warnings first, then regional monitoring and hazard information. Live readings can be provisional or interrupted during severe weather.
Prepare before water reaches the site
Use flood maps, LIM information, past events, drains, contours and site photos.
People first, then critical entrances, services, records, stock, plant and continuity functions.
Choose the forecast, gauge level or on-site observation that starts deployment.
Assign roles, label equipment, time the setup and review after every exercise or event.
Portable flood protection options
A doorway, garage, loading bay and whole-site perimeter do not need the same solution. Expected depth, flow, ground surface, width, corners, storage, deployment time and drainage behind the barrier all influence the choice.
A continuous barrier line can be configured around vulnerable areas.
Dry-weather training helps teams deploy safely and consistently.
Turn Wellington flood information into a site plan
Send Special Solutions Flood Protection photos, measurements and what you know about how water reaches the property. We can help identify a practical starting point for a home, school, marae, council site or organisation.
Request a free remote assessmentImportant: General educational information only—not real-time emergency advice, engineering certification or a guarantee against flooding. Follow official warnings and obtain property-specific advice for life safety, building work and critical infrastructure. Information and links reviewed 8 September 2026.