4 islands compared with data-backed recommendations
| Island | Score | Top Beach |
|---|---|---|
| Oʻahu | 7/10 |
Ko Olina |
| Maui | 8/10 |
Wailea/Kihei |
| Big Island | 9/10 |
Kohala Coast |
| Kauaʻi | 6/10 |
— |
Top beach: Kohala Coast
Why: Kona side averages <10 inches of rain per year — driest area in Hawaii
Caveat: Hilo side gets 130+ inches — stay on the Kona coast
Top beach: Wailea/Kihei
South Maui averages 15 inches, one of the driest resort areas
Mount Waialeale is the wettest spot on Earth (450+ inches/year)
Based on our analysis, Big Island is the top pick for least rain in Hawaii. Kona side averages <10 inches of rain per year — driest area in Hawaii. The top beach for this is Kohala Coast.
Big Island is generally good for least rain throughout the year, though conditions vary by season. Hilo side gets 130+ inches — stay on the Kona coast
While all four main islands offer some version of this experience, the quality varies significantly. Kauaʻi is the weakest option because: Mount Waialeale is the wettest spot on Earth (450+ inches/year)
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⚠️ Important Disclaimer
Safe to Swim Hawaii is an independent passion project — it is not affiliated with the Hawaii Department of Health, any entity mentioned on this page, or any government agency or hotel brand. Water quality ratings on this site are estimates based on publicly available testing data and geographic analysis. They are not real-time measurements and may not reflect current conditions.
Always verify current water quality conditions with the Hawaii Department of Health Clean Water Branch before entering the water. This site is for informational purposes only and should not be the sole basis for any swimming decisions.
When in doubt, donʻt go out. 🤙