New Zealand flood information / Marlborough
Marlborough regional guide
Flood protection in Marlborough
The Wairau system, Ōpaoa and other rivers respond to rainfall across large upstream catchments. Floodwater may affect floodways, fords, roads and low-lying land before urban areas.
Representative regional image: Jonathan Harker, via Wikimedia Commons. Licence and full attribution details are provided on the linked source page.
Understanding flood risk in Marlborough
Blenheim, Picton, the Wairau and Awatere valleys, the Sounds and rural settlements require different combinations of river, surface-water and access planning.
Wairau, Ōpaoa, Awatere and other river systems
Confirm site-specific exposure through council mapping, local observations and qualified advice where required.
Floodways, stopbanks, fords and low-lying plains
Confirm site-specific exposure through council mapping, local observations and qualified advice where required.
Sounds access, slips and prolonged transport disruption
Confirm site-specific exposure through council mapping, local observations and qualified advice where required.
Marlborough Floodwatch combines rain, river flow, levels and local thresholds. Check upstream data and allow for the time water needs to move through the catchment.
Planning for people, places and continuity
Schools and early learning
Include river bridges, fords and rural transport in the trigger plan. Store systems above likely flood levels and practise with the staff who will deploy them.
Iwi, marae and community facilities
Marae and community facilities should combine official information with local catchment knowledge, protecting wharenui, kitchens, services and taonga without blocking safe access.
Councils, businesses and organisations
Vineyards, wineries, farms, councils and transport operators should protect critical pumps, chemicals, electrical assets and stock and plan for road closures.
Official Marlborough 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 Marlborough 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.