What to expect for water quality, rainfall, and ocean conditions
Winter rain washes runoff from the West Maui Mountains toward the coast. Post-fire erosion concerns add to sediment risk during heavy storms. Advisory events are possible.
March rainfall begins decreasing at Kaʻanapali. Winter swells continue but are less consistent. The beach can experience periods of excellent conditions between weather events.
Winter north swells wrap around to the west coast, bringing larger surf to Kaʻanapali. Swimming can be affected during big swell events. Water temperature is around 75-77°F. Black Rock can have stronger currents.
Very high. March is spring break season with families and college students. Popular beaches fill early in the morning.
The Hawaii Department of Health recommends staying out of the ocean for at least 72 hours after heavy rain. In march, this is especially important as wet-season storms can produce heavy rainfall and significant runoff.
When conditions are clear, Kaʻanapali Beach 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. 🤙