Each spring, meteorologists and media outlets eagerly anticipate the release of the Colorado State University (CSU) Atlantic Hurricane Season Forecast. These forecasts estimate how many storms may form during the upcoming season and often shape headlines about whether the year will be “active” or “quiet.”
Below is a summary of the most recent forecast:
| Forecast Parameters | CSU Forecast for 2026 | Average for 1991-2020 |
| Named Storms | 13 | 14.4 |
| Named Storm Days | 55 | 69.4 |
| Hurricanes | 6 | 7.2 |
| Hurricane Days | 20 | 27 |
| Major Hurricanes | 2 | 3.2 |
| Major Hurricane Days | 5 | 7.4 |
But how accurate are these seasonal forecasts?
Looking back over the past decade reveals something important: forecasting the exact number of hurricanes months in advance is extremely difficult. And more importantly for event planners, municipalities, and businesses, the seasonal forecast tells us very little about where storms will actually strike.
The Last 10 Years: Forecast vs. Actual Hurricanes
Below is a comparison of the initial CSU April hurricane forecast versus the actual number of hurricanes that occurred in the Atlantic basin.
| Year | CSU Forecast (Hurricanes) | Actual Hurricanes | Difference | |
|---|---|---|---|---|
| 2025 | 9 | 5 | -4 | |
| 2024 | 11 | 11 | 0 | |
| 2023 | 7 | 7 | 0 | |
| 2022 | 9 | 8 | -1 | |
| 2021 | 8 | 7 | -1 | |
| 2020 | 8 | 14 | +6 | |
| 2019 | 5 | 6 | +1 | |
| 2018 | 7 | 8 | +1 | |
| 2017 | 6 | 10 | +4 | |
| 2016 | 6 | 7 | +1 | |
What This Data Shows
Over the past decade:
- The average CSU forecast was about 7.6 hurricanes
- The average actual number was about 8.3 hurricanes
- The typical forecast error was about 1 hurricane
In many years, the forecasts are impressively close. But occasionally, the atmosphere produces a season that surprises even the best scientists.
For example:
- 2020 produced 14 hurricanes, far exceeding the forecast of 8.
- 2017 saw 10 hurricanes, including devastating storms like Harvey, Irma, and Maria.
These “outlier” seasons illustrate just how complex the climate system can be.
Why Seasonal Hurricane Forecasts Are Hard
CSU and other forecasting groups rely on large-scale climate indicators such as:
- Atlantic sea surface temperatures
- El Niño and La Niña patterns
- Atmospheric wind shear
- West African monsoon strength
These factors influence how favorable the environment may be for tropical storm development. However, the atmosphere is constantly evolving, and small changes in these variables can significantly alter seasonal outcomes.
Even when the total number of storms is predicted correctly, forecasts cannot determine months in advance where hurricanes will track or make landfall.
Why This Matters for Event Planning
For fairs, festivals, concerts, and other outdoor events, the seasonal hurricane forecast often receives a lot of attention. But from a risk management perspective, the basin-wide forecast is far less important than the weather that actually impacts your event.
A “quiet” season can still produce a single devastating storm in the wrong location.
Conversely, a hyperactive season may have minimal impact on your event if storms remain offshore.
That’s why experienced event planners focus less on the seasonal forecast and more on protecting the financial risk associated with weather.
The Takeaway
Seasonal hurricane forecasts are valuable scientific tools that help us understand large-scale climate patterns. But history shows that they are not precise predictors of what will happen in any particular location.
For organizations hosting outdoor events along the coast or during hurricane season, the most important question is not:
“How many hurricanes will form this year?”
Instead, it is:
“What happens to our event if severe weather impacts us?”
Weather risk planning — including tools like event cancellation insurance and parametric weather coverage — allows organizers to protect their revenue regardless of what the seasonal forecast ultimately delivers.
If you are planning an outdoor event and would like to learn more about weather risk protection, visit:
https://spectrumweatherinsurance.com
At Spectrum Weather & Specialty Insurance, we specialize in helping fairs, festivals, amphitheaters, and outdoor events protect their revenue from weather uncertainty.
