Hurricane Season 2026: El Niño Suppression, Dueling Forecasts, and What History Actually Shows
CSU says 13 storms. The University of Arizona says 20. The difference comes down to one question: can El Niño's wind shear overpower the warmest Atlantic Ocean on record? We looked at every El Niño hurricane season since 1991 to find out.
The headline is simple: most forecasters expect a below-average 2026 Atlantic hurricane season. El Niño is the reason. It increases wind shear over the tropical Atlantic, tearing apart storms before they can organize. CSU's April 9 forecast calls for just 13 named storms and 2 major hurricanes — well below the 14/7/3 average.
After 2024's brutal season (18 storms, $124 billion in damage, 252+ deaths from Helene alone), a quieter year sounds reassuring. But I want to push back on that a bit. “Below average” doesn't mean safe. The 1992 season had just 7 named storms. One of them was Hurricane Andrew, a Category 5 that destroyed 63,000 homes in South Florida. The 2004 season developed during El Niño conditions and still produced 4 hurricane landfalls in Florida.
Here's what makes 2026 genuinely interesting from a forecasting perspective: the experts can't agree. The University of Arizona is calling for 20 named storms — 54% higher than CSU. That kind of spread doesn't happen often. The disagreement comes down to one variable: will El Niño's atmospheric suppression overpower the warmest Atlantic sea surface temperatures in recorded history?
Every 2026 Forecast, Compared
Four major forecast groups, four different answers. The most important number isn't named storms — it's major hurricanes (Category 3+), because those cause 85% of all hurricane damage despite making up only about 20% of landfalls.
| Source | Named Storms | Hurricanes | Major (Cat 3+) |
|---|---|---|---|
| CSU | 13 | 6 | 2 |
| TSR | 12 | 5 | 1 |
| AccuWeather | 11–16 | 4–7 | 2–4 |
| U of Arizona | 20 | 9 | 4 |
| 30-yr Average | 14 | 7 | 3 |
CSU released April 9, 2026. TSR revised down from their December preliminary. AccuWeather released March 25. U of Arizona is the lone above-average forecast.
Why Forecasters Can't Agree: El Niño vs. Atlantic SSTs
This is the most interesting disagreement in hurricane forecasting in years. Here's the tension in plain terms:
Team “Below Average” (CSU, TSR)
El Niño is now 85% likely by summer, with an 80% chance of reaching “strong” status. When El Niño is strong, it increases upper-level westerly winds across the tropical Atlantic, creating vertical wind shear that tears apart developing hurricanes. In the two strongest El Niño years (1997-98 and 2015-16), the Atlantic produced just 8 and 11 named storms respectively — well below average.
Team “Above Average” (U of Arizona)
Atlantic sea surface temperatures are at record levels. The North Atlantic is in a warm phase of its multidecadal oscillation (+AMO), and global SSTs set a new daily record in mid-April 2026. The University of Arizona argues this warmth provides so much fuel that hurricanes will form despite El Niño's shear. They point to 2023-24: a strong El Niño year that still produced 19 named storms because Atlantic temps were so extreme.
My take: CSU is probably closer to right for the overall count, but the U of Arizona is raising a valid point about the new reality of ocean heat. The honest answer is we won't know which force wins until August. CSU's June update will be significantly more useful once we see how quickly El Niño develops and whether Atlantic SSTs stay at record levels.
What El Niño Hurricane Seasons Actually Look Like
Forecasts are educated guesses. History is data. Here's what happened in every El Niño Atlantic hurricane season since 1991 — the good, the bad, and the ones that defied the “El Niño = quiet season” assumption.
| El Niño Year | Strength | Storms | Hurricanes | Major |
|---|---|---|---|---|
| 2023-24 | Strong | 19 | 7 | 3 |
| 2015-16 | Super | 11 | 4 | 2 |
| 2009-10 | Moderate | 9 | 3 | 2 |
| 2006-07 | Moderate | 10 | 5 | 2 |
| 2004-05 | Weak | 15 | 9 | 6 |
| 2002-03 | Moderate | 12 | 4 | 2 |
| 1997-98 | Super | 8 | 3 | 1 |
| 1991-92 | Moderate | 7 | 4 | 1 |
The Uncomfortable Pattern
The average El Niño season since 1991 produced roughly 11 named storms — 21% fewer than normal. But look at the outliers: 2004 produced 15 storms including 6 major hurricanes and 4 Florida landfalls during a weak El Niño. And 2023-24 hit 19 storms during a strong El Niño because Atlantic SSTs were extreme. The lesson: El Niño reduces the average but doesn't set the ceiling. One well-placed Category 4 makes a “below average” season devastating.
Hurricane Risk by State: 170+ Years of NOAA Data
Seasonal forecasts tell you how many storms form. They don't tell you where they hit. For that, we have to look at history. NOAA's HURDAT2 database tracks every hurricane landfall since 1851. Three states absorb over 80% of all US hurricane landfalls.
120 hurricanes since 1851 · 37 major (Cat 3+)
Costliest: Hurricane Andrew (1992)
64 hurricanes since 1851 · 19 major (Cat 3+)
Costliest: Hurricane Harvey (2017)
62 hurricanes since 1851 · 18 major (Cat 3+)
Costliest: Hurricane Katrina (2005)
55 hurricanes since 1851 · 7 major (Cat 3+)
Costliest: Hurricane Helene (2024)
30 hurricanes since 1851 · 5 major (Cat 3+)
Costliest: Hurricane Hugo (1989)
Data from NOAA AOML HURDAT2 database, 1851–2024. See all state weather records →
2026 US Landfall Probabilities
CSU calculates landfall probability separately from storm counts. These numbers reflect the combined effect of El Niño suppression and the expected storm tracks.
Every region is below its long-term average. The Gulf Coast at 20% vs. 27% average is a meaningful reduction. But for perspective: a 32% chance of a major hurricane landfall somewhere on the US coast is still roughly 1-in-3 odds. You wouldn't get on a plane with those failure rates.
Month-by-Month: When Hurricanes Actually Form
Not all hurricane season months are equal. Here's when the real risk starts, based on 170+ years of NOAA records.
For 2026 specifically, El Niño is expected to strengthen through the summer. If it follows the typical development curve, August and September — the peak months — will see the maximum suppressive effect. That's the primary reason CSU is forecasting below-average major hurricanes: the shear should be strongest exactly when it matters most.
How Much Should You Trust April Forecasts?
Honestly? Use them as a general direction, not a precise prediction. CSU's April forecasts correctly identify above-average vs. below-average seasons about 60-70% of the time. But exact storm counts are a different story.
In 2024, CSU's April forecast called for 23 named storms. The actual number was 18 — a miss of 5 storms, but the “above average” call was correct. In 2015, forecasters predicted near-normal activity and got it right thanks to strong El Niño suppression. The forecast CSU issues in June has historically been more accurate because by then, SST patterns are clearer and El Niño strength is more certain.
What to Watch in the June CSU Update
CSU updates its forecast in early June. By then, we'll have 6+ more weeks of ENSO data, updated SST readings, and early-season activity (or lack thereof) to calibrate against. The biggest question: if El Niño develops faster than expected and Atlantic SSTs stay at record levels, watch for CSU to either hold firm or shift toward AccuWeather's wider range. If they narrow the range downward, El Niño is winning. If they revise upward, the ocean warmth is winning.
Same El Niño, Different Story: Fewer Hurricanes but a Hotter Summer
The same El Niño that's suppressing hurricane activity is amplifying summer heat across most of the country. NOAA's CPC has 36 states leaning above-normal temperatures. Drought covers 61% of the lower 48. It's the classic El Niño tradeoff: fewer hurricanes, but more heat, more drought, and higher wildfire risk. For a full breakdown of what the summer 2026 outlook means for your city, see our recently updated analysis.
Data Sources & Methodology
This analysis draws on the CSU April 2026 hurricane season forecast, the AccuWeather 2026 forecast, TSR (Tropical Storm Risk) seasonal forecast, and the University of Arizona outlier forecast. Historical data from the NOAA HURDAT2 database (1851–2024). El Niño probabilities from the IRI April 2026 Quick Look and the CPC ENSO diagnostic discussion. 2024 season data from NOAA NHC post-season reports.
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