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Wellington Region

Ruamahanga River at Waihenga Bridge

The Ruamāhanga River is the largest river in the Wairarapa.  With headwaters in the Tararua Ranges, the river flows through the Wairarapa Valley for about 130 kilometres. 

This site is located in the middle reaches of the Ruamāhanga  catchment, just after it joins with the Huangarua River.

The Ruamāhanga River passes through several townships and extensive farmland before discharging into Lake Onoke which opens into the sea at Palliser Bay. 

Flow Data
Scientific data for this flow site
  • Live Flow Data
    Latest sample:
    Percentage of time flow exceeded
    High flowLess than 5%
    Elevated flow5% to 29%
    Normal flow30% to 69%
    Reduced flow70% to 94%
    Low flow95% to 100%
    Show more information Hide

    • Last 24 hours
    • Last 7 days
    • Last 30 days

    Key figures

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    Other notable measurements

    Droughts Month/Year Flow
    February 2013 5.517
    Floods Month/Year Flow
    February 2004 1903