Council Services

Rainfall monitoring

Greater Wellington Regional Council monitors rainfall at over 40 sites across the region. The information collected is vital for floodwarning, water management during drought, and detecting long-term trends in climate.

The data are logged on a regular basis (usually every 5 or 15 minutes) and then uploaded to a database via telemetry (radio or cell phone transmission) every 2 to 3 hours. This is "raw data" because it has not yet been passed through GWRC checks. Once it has been checked it is moved to a secure archive and is referred to as 'archived data'.

The data provided via the GWRC website is a combination of archived and raw data. The archived data is shown in black and the raw data is shown in red. This ensures that the data provided is as accurate and up to date as possible. Should you require the information in a form other than how it is presented on the GWRC website, please contact GWRC as they can usually provide it to you within two working days.

Every month GWRC publish summaries of the information collected and other reports on rainfall to give a general picture of recent trends.

Visit Greater Wellington Regional Council for more information.


Use the links below to view data collected at the following sites:

Akatarawa (at cemetery)  View data This site is located approximately 1km upstream from the confluence with the Hutt River and has been operating since March 1988. The river water level/flow and water temperature at this site are also measured.

Akatarawa Hills (at Warwicks)  View data This site is located near the summit of the Akatarawa Hill Road and is on the boundary of the Akatarawa and Waikanae catchments. It has been operating since June 1980.

Hutt River (at Savage Park)  View data This site is owned by Upper Hutt City Council and is maintained by Greater Wellington under contract. The site has been running since 12 July 2010.

Kaitoke (hutt at Kaitoke headworks)  View data This site is located in the Kaitoke Regional Park and has been operating since January 1991.

Mangaroa (at Maymorn pump station)  View data This site is owned by Upper Hutt City Council and is maintained by Greater Wellington under contract.

Mangaroa (at Tasman Vaccine)  View data This site is located at the top of the Mangaroa catchment and has been operating since July 1980.

Pakuratahi (at Centre Ridge)  View data This site is located on the hillside above the Rimutaka Incline track and has been operating since April 1984.

Pinehaven (Pinehaven reservoir)  View data This site is owned by Upper Hutt City Council and is maintained by Greater Wellington under contract.

Te Marua (hutt at Te Marua)  View data This site is located near the Te Marua water treatment plant and has been operating since July 1993. The water level/flow and water temperature are also measured at this site.

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