Oceania Climate – July 2026 Update
Top 5 Countries: Australia, New Zealand, Papua New Guinea, Fiji, and Solomon Islands
Summary
Across Oceania, atmospheric warmth reached a full degree Celsius above the 1961–1990 baseline during the month. Mild winter weather across southern landmasses coincided with rapid oceanic warming across the tropical Pacific, driven by a moderate El Niño that carries an 81% probability of reaching Very Strong status in Oct-Dec. While parts of the western Pacific island chain recorded suppressed temperatures, main landmasses saw widespread warmth alongside localized winter downpours. As the equatorial ocean continues to warm, drier and warmer conditions are expected to expand across the region in the coming months.
This month in numbers
Oceania recorded a 1-month temperature anomaly of +1.00°C above the 1961–1990 baseline, continuing a sustained period of elevated temperatures. The region's 3-month anomaly stood at +0.89°C, while the 12-month rolling average reached +0.88°C. In the global cross-region rankings covering 232 areas, Oceania showed marked internal divergence, with tropical territories like Fiji placing as the 2nd coolest area worldwide for the 1-month period at -0.97°C.
Hottest & coolest countries
In the member country rankings, New Zealand registered the highest warm anomaly across the region at +1.13°C, marked by unseasonably mild winter conditions and elevated temperatures in southern districts. Australia also ran warm with an anomaly of +0.66°C, driven by widespread winter warmth across its eastern states. In contrast, Fiji stood out at the cooler end of the spectrum with an anomaly of -0.97°C, while neighbouring Vanuatu sat at -0.21°C below the long-term baseline.
What's driving change?
The primary regional atmospheric driver is ENSO, with the tropical Pacific currently in a moderate El Niño state registering a 3-month Relative Niño Index anomaly of +0.98°C. This system is intensifying rapidly and carries an 81% probability of reaching Very Strong status in Oct-Dec, as tracked at ENSO. The phenomenon is altering trade wind patterns and accelerating ocean heat release into the atmosphere. On land, , amplifying winter warmth across major Australian and New Zealand territories, where persistent dry spells in some areas increase the risk of as spring approaches.
Generated by Gemini from climate data and web sources
At a Glance
Temperature – Average
Climate Map – Global
Source: NOAA Climate at a Glance (countries & continents) · Met Office (UK) · US states & climate regions. Anomalies are vs the 1961–1990 baseline. See methodology.
Long-Term Trends
Combined Timeline – Oceania
Right axis: everything else standardized to standard deviations (σ) from its own average, since mm/hours/days aren't directly comparable to °C or to each other.
4byo continent aggregate · equal-weight mean of member country monthly absolute temperatures (OWID/CRU TS); precipitation: GPCC (DWD).
Heatwave Days – Oceania
Warm Spell Duration Index (WSDI) - the WMO/ETCCDI heatwave measure: days in a 6+ day run above the local 90th-percentile temperature for that time of year. Equal-weight mean across 2 countries.
Data: World Bank Climate Change Knowledge Portal (ERA5-derived), aggregated by 4BYO across member countries. Refreshed roughly 1-2x/year, ~7-8 months behind present.
Hottest & Coolest in Oceania this Month
1-month anomaly vs 1961–1990 across the 2 members we cover. Click a name to open its profile.
Warmest
- 1.🇳🇿New Zealand+1.13°C
- 2.🇦🇺Australia+0.66°C
Coolest
- 1.🇦🇺Australia+0.66°C
- 2.🇳🇿New Zealand+1.13°C
Year-on-Year Trends
The 4byo Climate Helix – Oceania
4byo continent aggregate · equal-weight mean of member country monthly absolute temperatures (OWID/CRU TS); precipitation: GPCC (DWD).
Monthly Temperature – Oceania
Background lines show the last 40 years (plus the record year and its opposite, wherever they fall).
4byo continent aggregate · equal-weight mean of member country monthly absolute temperatures (OWID/CRU TS); precipitation: GPCC (DWD).
Records – Oceania
4byo continent aggregate · equal-weight mean of member country monthly absolute temperatures (OWID/CRU TS); precipitation: GPCC (DWD). - Anomalies vs 1901-2000 mean
Shifting Seasons
Warm/cold + wet/dryKöppen BSh · AridOceania has both a clear warm/cold cycle (±6.8°C) and a wet/dry cycle (4× wet:dry ratio). Both sides of the annual rhythm are shown below.
Monthly precipitation climatology. A “wet month” exceeds the baseline monthly mean (dashed gold line). Biggest month-to-month shift: Mar (+9 mm, +14%).
4byo continent aggregate · OWID/CRU TS country monthly temperatures & precipitation: GPCC (DWD). Baseline: first 30 yrs on record. Recent: last 10 yrs on record.
Climate Systems
Loading ENSO tracker…
Emissions & Energy
Explore
Explore Climate Data
Data Sources
Data Sources for Oceania
Every figure on this page is sourced from official, openly published climate datasets. Anomalies are calculated against the 1961–1990 baseline (temperature) and 1991–2020 (rainfall, sunshine, frost) - see the Methodology & Sources page for the complete dataset list and update calendar.
Continental land temperature anomaly. NOAA NCEI national & continental time series.
Country-level temperature anomaly, sourced from Copernicus ERA5 and Hadley HadCRUT5.
Annual country and global CO₂ emissions, from the Global Carbon Project.
Monthly rainfall - Global Precipitation Climatology Centre (DWD) preferred, World Bank CCKP/CRU TS fallback where GPCC lacks direct coverage.
Frost Days and Heatwave Days (Warm Spell Duration Index), ERA5-derived. World Bank Climate Change Knowledge Portal.
Monthly snow water-equivalent, Global Precipitation Climatology Centre (DWD).
FAQs
FAQs
How is the climate in Oceania changing?
Oceania is warming in line with the rest of the world. The page above shows the latest monthly temperature anomaly versus the 1961-1990 baseline, the long-term annual trend, and the region's rank in the historical record. The headline panel also shows the long-term trend rate per decade and the warmest and coolest years on file.
Where does the climate data for Oceania come from?
Climate data for Oceania comes from Our World in Data, sourcing Copernicus ERA5 and HadCRUT5 (national temperature anomaly) and the Global Carbon Project via Our World in Data (CO₂ emissions), refreshed every month, when the upstream temperature and rainfall data are refreshed.
What is the climate baseline used on this page?
Anomalies on this page are calculated against the 1961-1990 climatological baseline, which is the standard reference period used by the Met Office, NOAA, IPCC and most national climate services. Some panels also show the source-native 1901-2000 (NOAA) or 1991-2020 (WMO) baselines for verification. See Methodology & Sources for the full reference.
Which areas does the Oceania climate data cover?
The Oceania climate profile covers Australia, New Zealand, Papua New Guinea, Fiji and surrounding areas. Australia, New Zealand and the Pacific - continental temperature trends
How often is the Oceania climate update refreshed?
The Oceania climate update is refreshed monthly, typically a few days after the previous month closes and the upstream provider (Met Office HadUK-Grid, NOAA Climate at a Glance, Copernicus ERA5 or the Global Carbon Project) publishes its update. See the Climate Rankings for cross-region comparisons.
What counts as a Heatwave Day on the Oceania climate page?
Heatwave Days use the Warm Spell Duration Index (WSDI) - the WMO/ETCCDI-standard heatwave measure: days that are part of a run of 6 or more consecutive days above the local 90th-percentile temperature for that calendar day. The 90th-percentile threshold varies by time of year (a hot day in January is judged differently to one in July) but is fixed to the 1961-1990 baseline for every year shown - it does not shift as the climate warms, which is why Heatwave Days trend upward over time.
Does the Oceania climate page include frost and snow data?
Yes. Frost Days (days with a minimum temperature below 0°C, World Bank CCKP) and snow water-equivalent (GPCC) are shown alongside temperature and precipitation, each measured against the 1961-1990 baseline where a like-for-like historical comparison is available.