Scuba Diving in Oahu
Live conditions, water-clarity forecast, and thermocline data for scuba diving in Oahu, HI. Open the app for a live verdict, tappable factor breakdown, and a 10-day forecast — free, no signup needed.
About Oahu
World-class bluewater spearfishing for mahi, wahoo, and yellowfin tuna — the FAD buoys off shore are legendary. North Shore surf breaks in winter are the gold standard.
Notable species
Oahu is known for:
Typical water visibility
Summer visibility in Oahu typically ranges from 40–100 feet, depending on recent rain, river discharge, and swell mixing. Winter and post-storm windows can drop this significantly. Submarius's water-clarity forecast blends satellite turbidity (NOAA CoastWatch Kd490), river-plume detection, wave-mixing models, and community post-dive reports to predict how far you'll actually see on a given day — not just the summer average.
How the clarity forecast works →What Submarius shows for Oahu
- Verdict score (0–10). Aggregates wind, swell, tide, moon, and water clarity into one decisive number.
- Best window. The 2–3 hour stretch each day when conditions peak.
- 10-day forecast. Auto-scaled line graph showing which day this week is trending good.
- Water clarity forecast. Secchi-depth estimate with uncertainty bounds and the next best viz window.
- Free, anonymous. Check conditions with location on — no signup until you want to save spots or post reports.
Safety in the water
Submarius ships OCEARCH tagged-shark alerts, community shark sightings, SOS, and buddy GPS sharing — permanently free, regardless of subscription tier. For Oahu specifically, the app shows any recent tagged sharks within range and lets you enable push notifications for sightings on your active tiles.