» Seasonal and Climate Info

Historical Data and Indicators

NIWA - National Climate Centre - with monthly, seasonal and annual Climate Summaries
NIWA - Climate Data (Education & Training) - incl. Extremes (to 2004) and Location Summaries (to 2000)

Trends Online - A Compendium of Data on Global Change (Carbon Dioxide Information Analysis Center)

Southern Oscillation Index - via BoM
Madden-Julian Oscillation Indices - NOAA (or lots of info from BoM)

Seasonal / Climate Forecasts

NIWA - current Climate Update, including a summary of last month, and climate outlook

MetService - North Island and South Island seasonal outlook for the next two months

BoM - forecast ENSO conditions (from multiple models)

ECMWF - Seasonal Forecast Charts of T(2m), MSLP, Rain, SST (but not covering NZ)

Climate Info and Commentary

IPCC - Intergovernmental Panel on Climate Change - see also the Working Group Reports at,
» Working Group I: "The Physical Science Basis"
» Working Group II: "Impacts, Adaptation and Vulnerability"
» Working Group III: "Mitigation of climate change"

RealClimate - "Climate science by climate scientists" - an excellent commentary site
» with a useful "start here" page with lots of links to get you up to speed on climate change