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MetWatch Software LogoMetWatch Software

The award winning MetWatch software provides quick and easy interpretation of weather data for use in horticultural management decision making. Use MetWatch to interpret weather data for up to the hour information on disease risk, and for general crop management information including heat accumulation and winter chilling.

MetWatch is designed with you in mind - minimum time in the office, maximum value information.

MetWatch Hourly weather data can be sourced from a wide range of weather stations giving critical disease risk information when you need it. For detailed information on the 50+ available weather stations around the country that you can access, go to our Weather Station Networkpage. Subscribe to the optional forecast, and MetWatch will forecast likely disease risk, and provide an assessment of how conducive the forecast weather conditions are for spraying.

MetWatch software can also help you to document the decision making process - helping you to meet requirements of various Integrated Production programs and EurepGAP.


  • A graphical display of weather data and disease risk that is easy to understand and interpret.
  • Import hourly weather information from a range of commercially available weather stations to give up-to-the-hour disease risk assessments and crop management information.
  • Import and display forecast hourly weather information, providing an integrated display of forecast disease risk assessment, preceding disease events, and forecast spray conditions.
  • Hourly and daily weather summaries in table and graph format including heat unit accumulations, rainfall accumulations, and chill hours.
  • Flexible format that allows the user to change the number of days displayed, the canopy-drying period, leaf wetness thresholds, heat unit accumulation threshold and other options specific to each disease model.
  • Display text information such as spray diary information on the same graph displaying weather and disease information.
  • Optimized coding to achieve little or no loading time.

Weather Forecasts

Weather forecasting information is provided by MetService - New Zealands premier provider of weather forecasting services.

A question we are commonly asked is "How accurate is the forecast?", a difficult question to answer. It is asked so often that we decided to cover it in the monthly 'Weather Sense' column that we provide for the Orchardist magazine. The article is titled 'Weather Forecast Accuracy' and is split over 4 consecutive months from March to June in 2009. These articles along with all the other 'Weather Sense' columns are available on the Resources area of the website

Hour-by-Hour (High Precision) Forecast

Hour-by-Hour (High Precision) Forecast A unique, world leading forecast that brings years of research & design to your decision making. An extremely advanced computer model is feed local weather data for calibration and generates this forecast. With the MetWatch software, the forecast is optional addition.

  • Highly localized forecasts for sub-regions going out 2½ - 3 days. Choose from 25+ sub-regional forecasts.
  • Forecast of hourly values of:
    • Air Temperature
    • Wind Speed and Direction
    • Relative Humidity
    • Leaf Wetness (Calculated)
  • This high precision forecast is updated 4 times a day: 7am, 11am, 3pm, 10pm
  • (great for planning your weekend fishing trip too!)
Region Number of sub-areas
Auckland & Northland 3
Bay of Plenty 2
Gisborne 2
Hawke's Bay 7
Nelson 4
Marlborough 5
Canterbury 4
Central Otago 3
Other 4

10-Day Forecast

10-Day Forecast A regional text forecast going out 10 days to provide longer term planning horizons. This text forecast is available for 16 regions around the country. It is written by a meteorologist and updated once a day around 9am.

Weather Map

Weather Map A prognosis weather map (chart) is also available for you to get a bigger picture of the forcasted weather patterns around the country for the next day. This is updated twice a day, every 12 hours from midnight.

Disease Management

HortPlus MetWatch software unleashes the power of hourly weather station data and hour-by-hour weather forecast information using sophisticated disease risk assessment models. Disease risk assessment models interpret weather data giving information on recent disease behavior as well as predicted disease risk. Different versions of HortPlus MetWatch are available for different crops:

  • Apple:
    • Black Spot (Apple scab)
    • Asco Spore
    • Fire Blight
  • Grape:
    • Botrytis (Bacchus)
    • Botrytis (Broome)
    • Downy Mildew
    • Powdery Mildew
  • Peach:
    • Brown Rot
    • Leaf Rust
  • Field Crops:
    • Onion Downy Mildew
    • Potato Early and Late Blight
  • Other:
    • Generic wet weather disease

Crop Management

Crop management information is available to all users of MetWatch through the daily weather summaries including growing degree days and chill unit calculations. Growing Degree Day and Winter Chilling data provide critical information for many crop management decisions, and are excellent for making between season comparisons.

You can choose to view the table of values or graph the results where you can add additional plots for comparison. Also like most of the MetWatch features, the daily summaries include a copy button to transfer the summary data to a speadsheet or word processor for further analysis and inclusion in reports.

Weather Summary

Importing Data

If you have your own weather data and you would like to use the MetWatch software analysis and risk assessment tools with it, you can! The MetWatch software can import data from almost any source for you to take advantage of. There is a generic weather data import feature to cater to custom formats, and dedicated import wizards for:

  • HortPlus Temperature & Humidity MicroLogger data.
  • Campbell Scientific weather stations.
  • WeatherPro weather stations.
  • TinyTag data.

Note: if you import a lot of weather data, we recommend the professional license so you can create the QUE file to store the data in.

Which MetWatch is best for me?

Generally MWOL is your best option, but if you need to import your own data or do other things with the weather data like reports, you may be better off with the MetWatch Software.

If you are not sure which product is best for you, we suggest the first this you do is sign up for a free trial of MetWatch Online.

MetWatch Software

Pros (+) Cons (-)
  • Very fast, little to no loading time.
  • Mature software that's been developed for over a decade.
  • Able to import data from almost any source for use with the MetWatch disease risk and analysis tools.
  • Pay per weather station access.
  • Not as many forecast options as MWOL.
  • Will not work on an Apple Mac computer.

MetWatch OnLine (MWOL)

Pros (+) Cons (-)
  • Access to all weather stations, forecasts, disease models, and analysis tools.
  • Accessible from any internet connected computer.
  • Always have the latest tools and developments available, no need to manually update.
  • Can not import weather data from your own source.
  • The 'copy to excel' ability is not always available.
  • Longer loading time for dial-up internet connections.

MetWatch Daily Reports (MDR)

Pros (+) Cons (-)
  • Reports regularly emailed directly to your inbox.
  • No need to load a website or remember any login.
  • Delivered any time of the day or night.
  • Limited flexibility in changing model parameters.
  • Not as many models, tools and forecasts.
  • Weather and disease information can change after report is sent.

Professional Version

The MetWtach software also come in a professional version, with a few additional benefits. Its generally aimed at scientists, those with their own weather station, or those that plan to use MetWatch to assist them with reports.

Disease event summary

All disease events for the specified disease occurring within the range of dates requested by the user are summarised in this report. Use the copy button facility to copy this information to word processor or spreadsheet for use in your reports.

Custom screen capture

On the main window of Metwatch, you have the ability to copy just the disease risk graph or all graphs as an image for use in reports or presentations.

Create QUE files

QUE files are the files that MetWatch uses to hold the weather data, with the professional version you have the ability to create these as you need them. This is an important feature if you import a lot of weather data or own your own weather station.


MetWatch is sold in a number of variations so that you only need to pay for the disease and crop management information you require.

The weather station access licence is an annual subscription. The weather station subscription "year" ends 31st of May regardless of subscription start date (no prorata). Weather station subscription price range from $225 - $290, please enquire for prices.

Product KitsNZ Customers ($NZ)International Customers ($US)
Metwatch Software Starter Kit
1 x MetWatch Software.
1 x Annual single weather station licence.
1 x Annual subscription to forecasts
Individual ProductsNZ Customers ($NZ)International Customers ($US)
MetWatch Software
$325.00ask us
MetWatch Software (Professional)
Aimed at Scientists.
$1140.00ask us
Forecast Access
Annual subscription includes all forecasts
Weather Station Access
Annual subscription per station
ask usn/a
Apple Ascospore Module
$150.00ask us

Order Now!

All prices are GST exclusive.

Payment and Shipping

Your order will be shipped as soon as we receive your payment in full. Domestic and international orders will be shipped via NZ Post or NZ Couriers at our discretion.


Make cheques payable to HortPlus (NZ) ltd and mark 'not negotiable'. Don't worry about cheque fees... all part of our service!

Visa/Master Card

You can e-mail your Visa number to us, or if you prefer send it by fax. See the bottom of the page for details.

Direct Credit

Contact us for bank account details for direct payment. See the bottom of the page for details.

Returns Policy

HortPlus stands behind its products. If you are not happy, we are not happy!

If a product is defective we will either replace it or refund the purchase price at your direction.

If for any other reason you are not entirely happy with your purchase and you would like to return it for full refund within 30 days of receipt, call us first then return the software, hardware, and any accompanying materials. For a full refund to be available any hardware must be returned in the same condition in which it was shipped to you.

Note that demo units are available for most of our products so you can try before you buy. We limit refunds to unit sales, eg if you are interested in purchasing 100 data loggers buy one and try before buying the 100!

Product Highlight

Temperature & Humidity MicroLoggers

Small, stainless steel enclosed, re-usable, and extremely robust at a great price.
Temperature & Humidity MicroLoggers


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