The word "forecast" typically means a prediction or estimate about future events or trends. Antonyms for "forecast" might include terms like hindsight, history, or past. These words imply a focus on events that have already occurred rather than those that may come to be. Other antonyms might involve ideas related to uncertainty or unpredictability, such as randomness or chaos. Additionally, the word "forecast" has specific connotations related to weather, so antonyms might include words like sunny, clear, or calm, which suggest a lack of disruptive or dangerous weather patterns. Overall, antonyms for "forecast" can help to provide a broader sense of context and contrast, and highlight important differences in meaning and perspective.