- Start
- Jun 1, 202775% CONFIDENCEfrom the source
- End
- Nov 30, 202775% CONFIDENCEfrom the source
The 2027 Atlantic Hurricane Season Opens
- The official Atlantic hurricane season runs from 1 June to 30 November, though tropical cyclones sometimes form outside those dates. [S]
- The eastern Pacific season is a fortnight longer at the front, running from 15 May to 30 November. [S]
- NOAA issues its seasonal outlook for the Atlantic shortly before the season opens — for 2025 it came with a news conference on 22 May. [1]
References 277% CONFIDENCE
The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
- [1]75%nhc.noaa.gov/climonhc.noaa.gov· Posted Sep 21, 2026· Starts Jun 1, 2027 ✓· Ends Nov 30, 2027 ✓· 87% of score
The season's bounds are fixed by the National Hurricane Center, not forecast: "The official hurricane season for the Atlantic basin is from June 1 to November 30, but tropical cyclone activity sometimes occurs before and after these dates." The pin therefore ends at the exclusive 00:00Z boundary of 1 December 2027.
- [2]90%NOAA predicts above-normal 2025 Atlantic hurricane seasonnoaa.gov· Published May 22, 2025· 13% of score
NOAA's[1] own seasonal outlook release, which both repeats the 1 June to 30 November bounds and shows when in May the agency publishes its forecast.
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Bureau of Meteorology
