Seasonal forecast models

Five operational seasonal prediction systems are imported from the Copernicus Climate Change Service. Each is shown on the same grid, the same colour scale and the same valid period, to support comparison. Each system still has its own hindcast climate, ensemble design and forecast skill.

Systems shown are those imported for August and September 2026. The 1° grid is the C3S output grid, not the native model resolution. Monthly mean anomalies come from C3S; probabilities and three-month products are derived locally from its operational data. See the C3S system descriptions and ensemble schedules.

Comparing them

Open the workspace to put any two to four centres next to each other for one initialization, or switch to run mode to follow how one centre’s outlook has changed month by month. See comparing seasonal models and runs for when each view is useful, or start from a written comparison:

• ECMWF vs UK Met Office seasonal forecasts
• Europe seasonal temperature outlook: five models compared
• How the seasonal outlook changed between monthly runs