Warm Water Holds Steady Across Hawaii's Nearshore Waters
Water temperatures across the islands sit in the high 70s to low 80s this week, with NOAA CO-OPS station 1612340 off Oahu reading 82.4°F and station 1615680 near Maui at 79.2°F as of Tuesday afternoon. Those readings sit squarely in the range that keeps Hawaii's nearshore and reef fisheries active through the tail end of September, with no cooling trend showing yet in the tide-station data. The next low tide off Oahu falls at 12:47 p.m. local time, with Maui's low arriving earlier at 10:10 a.m., giving anglers a clear window to plan an outgoing-tide session around midday.
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Expect water temps to hold in this range through the week. Late-September readings this warm are typical for the islands, and the tide stations show no sharp swings in either direction. With the moon in a waning gibbous phase, tidal exchange is moderate rather than the extremes anglers see near new or full moon, so plan around the midday low windows above rather than chasing a big moon tide. The falling tide into early afternoon is generally the more productive window at inlets and channel mouths, and that pattern should hold into the weekend. Check both station pages again closer to your trip, since low-tide timing shifts by roughly 50 minutes each day.
Context
Hawaii's saltwater fisheries don't see the sharp seasonal swings mainland anglers plan around. Water stays warm enough to support consistent activity nearly year-round, and late September sits well within that stable stretch rather than marking any kind of transition. Tide and moon timing, more than temperature, tend to drive day-to-day fishing decisions in island waters this time of year.
Synthesized from real-time NOAA buoy data, USGS stream gauges, and current reports across regional fishing blogs, captain updates, and angler forums. Check local regulations before keeping fish. Never trust a single source for a trip decision.
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