Oʻahu water quality is worsening (-29pp in 14 days)
Oʻahu ocean water quality worsened 29 percentage points over the last 14 days (100% clean two weeks ago vs. 71% clean now).
For a trip in the next week, prioritize islands with stronger structural protection (dry coasts, reef enclosure, no major streams). See cleanest Hawaiian island and BWA alternatives.
Big Island has been persistently clear — the same baseline as the prior two weeks. 0 of our 7 tracked beaches on the island have active advisory days in the last 30 days. NOAA's 7-day forecast is mild — scattered showers possible but unlikely to drive new advisories. See the Big Island leaderboard for the beach-by-beach ranking.
Maui has been persistently clear — the same baseline as the prior two weeks. 0 of our 6 tracked beaches on the island have active advisory days in the last 30 days. NOAA's 7-day forecast is dry, so the persistently clean baseline should hold. See the Maui leaderboard for the beach-by-beach ranking.
Oʻahu is worsening over the last 14 days (-29pp vs. the prior two weeks). Our 12 tracked beaches happen not to overlap with the DOH advisories driving this signal — the worsening trend is from island-wide or other-area advisory events. NOAA's 7-day forecast is mild — scattered showers possible but unlikely to drive new advisories. See the Oʻahu leaderboard for the beach-by-beach ranking.
Kauaʻi has been persistently clear — the same baseline as the prior two weeks. 0 of our 6 tracked beaches on the island have active advisory days in the last 30 days. NOAA's 7-day forecast is mild — scattered showers possible but unlikely to drive new advisories. See the Kauaʻi leaderboard for the beach-by-beach ranking.
For the always-live per-island outlook, see our Hawaii Water Quality Forecast, which regenerates daily from NOAA + DOH data.
New report every day: trend per island, NOAA forecast, today's cleanest and most-advisoried beaches. Free — unsubscribe anytime.