What to expect for water quality, rainfall, and ocean conditions
Black Rock (Kaʻanapali) sees lower advisory risk in june due to reduced rainfall. Occasional showers can still cause brief water quality concerns, but conditions generally recover quickly.
June is part of Hawaii's dry season (April through September). Black Rock (Kaʻanapali) sees only about 0.3 inches of rain. Runoff events are infrequent and brief. Water quality is generally at its best during dry months.
Summer south swells bring moderate surf to Black Rock (Kaʻanapali). Waves are generally manageable but can build during south swell events. Water temperature is a warm 79-81°F. Trade winds keep conditions comfortable.
High. Summer vacation season begins in earnest. Families and tourists from around the world fill Hawaii beaches.
The Hawaii Department of Health recommends staying out of the ocean for at least 72 hours after heavy rain. In june, rainfall is less frequent but individual storms can still produce contaminated runoff.
When conditions are clear, Black Rock (Kaʻanapali) has excellent ocean activities. Check the water quality above, then book with confidence.
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Safe to Swim Hawaii provides water quality information based on publicly available DOH data and seasonal patterns. This is not medical or safety advice. Always check current conditions, obey posted signs, and use your own judgment before entering the ocean. Privacy Policy
⚠️ Important Disclaimer
Safe to Swim Hawaii is an independent passion project — not affiliated with the Hawaii Department of Health or any government agency. Water quality ratings 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 DOH Clean Water Branch before entering the water.
When in doubt, don't go out. 🤙