Flu Season Dates: When to Plan For
Flu seasonality varies significantly by climate, which matters for how far in advance workplaces should plan staffing and prevention measures.
Temperate climates
Per CDC and UK HSA surveillance, flu activity in the Northern Hemisphere typically runs autumn through spring, generally peaking between December and February. Southern Hemisphere countries see a mirrored pattern roughly six months apart.
Tropical climates (e.g. Singapore)
Tropical regions typically don’t have a single defined flu season — influenza circulates at lower levels year-round, sometimes with modest peaks tied to local rainy seasons or school terms rather than winter.
For Singapore-based businesses, this means year-round baseline prevention matters more than a single seasonal push — see our Singapore services hub for continuous, NEA-recognised sanitisation options. Wherever you’re based, see staying healthy this flu season for practical prevention steps, and check the current season strain guide for where to find live surveillance data.
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This page provides general public-health information sourced from CDC and UK HSA guidance and is not medical advice.