The Eastern Pacific basin (east of 140°W) officially opens for business on . This earlier date exists because this region warms up faster than the Atlantic. The Pacific hurricane season also ends on November 30, often with storms drifting toward the Hawaiian archipelago as "post-season" threats. The Northern Atlantic: The "Cape Verde" Caveat Even within the Atlantic, the start date is somewhat theoretical. A tropical storm forming in the Gulf of Mexico in early June is rare but possible. However, the "true" start of the intense hurricane activity—the long-track Cape Verde storms—does not begin until mid-August.
Meteorologists urge residents in hurricane zones to treat Memorial Day weekend (the last Monday of May) as the deadline for home preparation. By the time June 1 arrives, your hurricane kit should be stocked, your windows inspected, and your evacuation route memorized. Don't wait for the first tropical wave to appear on the radar to buy your bottled water.
While June 1 is the official start, scientists have noticed a troubling trend over the last decade: storms are forming before the bell rings. In 2023, an unnamed subtropical storm formed in January. In 2021, Tropical Storm Ana formed on May 22. Climatologists call this a shift toward a "longer season," though the peak remains firmly in September. The Eastern Pacific: May 15 – November 30 For the west coast of Mexico and the Hawaiian Islands, the hurricane season starts two and a half weeks earlier . when do hurricane season start
For millions of residents living along the Atlantic and Gulf coasts, the calendar carries an extra layer of meaning. While the first day of summer is marked by solstices and barbecues, the date that truly dictates the rhythm of life is June 1.
The National Oceanic and Atmospheric Administration (NOAA) selected these dates because they encompass more than 97% of all tropical cyclone activity. Historically, June 1 represents the statistical shift when ocean temperatures become warm enough (typically 26.5°C or 80°F) and wind shear low enough to support organized thunderstorm development. The Eastern Pacific basin (east of 140°W) officially
Here is the definitive guide to the official start dates of hurricane (or typhoon/cyclone) season across the globe. For the United States, the Caribbean, and the Gulf of Mexico, the answer is ironclad: June 1 .
But is that the universal answer? Not exactly. Depending on where you live—from the bustling ports of Shanghai to the vulnerable deltas of Bangladesh—the answer to "when does hurricane season start?" varies significantly. The Northern Atlantic: The "Cape Verde" Caveat Even
For decades, the season ended on October 31. But after a major hurricane hit Miami in November 1935, the bureau extended the season to November 30. To answer the original question simply: Hurricane season starts on June 1 in the Atlantic.