Summary 3

1. Observations: June-July-August 2026 6

  1.1 Observed Sea-Surface Temperature Indices 6

  1.2 Observed Surface Temperature 6

  1.3 Observed Rainfall 7

2. Predicted Evolution of the State of the Climate Over the Next Three Months: October-November-December 2026 7

  2.1 Predicted Sea-Surface Temperature Indices 7

  2.2 Predicted Surface Temperature 8

  2.3 Predicted rainfall 9

  2.4 Supplementary Information 10

3. Global Seasonal Climate Update Archive 11

4. How to use the Global Seasonal Climate Update 12

5. Acknowledgements 13