Flu in Hawaii: April 2026 Activity Update

Flu Activity in Hawaii — April 2026

Hawaii’s flu season follows a different pattern than the mainland US. While continental states typically peak in January-February, Hawaii can see flu activity year-round due to its tropical climate and steady flow of international travelers.

See the latest ILI data on our Hawaii flu dashboard.

What Makes Hawaii Different

Several factors make Hawaii’s flu surveillance unique:

• Year-round risk: Unlike mainland states, Hawaii doesn’t have a sharply defined flu season
• Travel gateway: As a major tourist destination and Pacific hub, Hawaii is exposed to flu strains circulating in Asia and Oceania
• Smaller population: With fewer ILINet reporting sites, week-to-week data can be more variable

Current Status

Check the Hawaii flu activity page for:

• Current ILI visit percentage
• Whether activity is rising, falling, or stable
• Comparison to the national average
• 52-week trend chart showing the full season

Also in March: Our Flu Hawaii Deep Dive

Earlier this season we published a detailed analysis of Hawaii’s flu patterns, including how the state compared during peak flu weeks and what drove the seasonal trend.

Other Health Data for Hawaii

• Hawaii COVID-19 activity — ER visit data
• Hawaii RSV activity — Hospital admissions
• Hawaii measles cases — 2026 tracking
• Hawaii MMR vaccination rate — Kindergarten coverage
• What’s going around in Hawaii? — Full health overview

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Updated weekly. Last update: April 3, 2026.