Spearfishing · Central California

Spearfishing in Monterey Bay

Deep canyon starts feet from shore. Cold, plankton-rich water: lower viz but world-class kelp forest ecology, lingcod, and cabezon for divers.

Live conditions, water-clarity forecast, and bite-window timing for spearfishing in Monterey Bay, CA. Open the app for a live verdict and a tappable factor breakdown, free, no signup. Pro extends the forecast to 8 days.

Open live conditions →

Conditions snapshot: Sep 2, 2026

Visibility

20 ft

13–33 ft range

Water

62°F

Wind

8 kts

Wave

2.7 ft

Swell

2.0 ft

Period

6.5s

Snapshot from Sep 2, 2026. Live values, factor breakdowns, and 8-day forecast in the app.

Notable species

Monterey Bay is known for:

LingcodCabezonRockfishWhite SeabassHalibut

Typical water visibility

Summer visibility around Monterey Bay is commonly reported in the 10–30 ft range, a community-guidance estimate, not a measurement. Rain, river discharge, swell mixing, and seasonality can shift real conditions dramatically day to day.

That's exactly why Submarius exists. The in-app clarity forecast starts from this coast's typical clarity for the time of year, built from in water measurements and satellite ocean color, then subtracts wave stirring, river and runoff plumes, and tide movement to estimate how far you'll actually see, shown as a low to high range, not a seasonal average.

How the clarity forecast works →

Clearest months at Monterey Bay

Model climatology from the baked clarity ceiling: the typical day and the best case (90th percentile) visibility for each month, with a seasonal algae bloom proneness flag. These are labelled model estimates, not measurements.

Month	Typical ft	Best case ft	Bloom risk
Jan	23	26	low
Feb	19	33	low
Mar	20	26	low
Apr	16	36	low
May	16	33	low
Jun	16	33	low
Jul	19	33	low
Aug	20	33	low
Sep	20	33	low
Oct	20	33	low
Nov	20	33	low
Dec	23	35	low

Ceiling artifact global-reef-v9b-rls-full; table baked Sep 2, 2026.

What Submarius shows for Monterey Bay

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.
8-day forecast. Auto-scaled line graph showing which day this week is trending good.
Bite score. Tide stage, moon phase, solunar windows, and pressure trend combined into a 0–10 predictor.
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 Monterey Bay specifically, the app shows any recent tagged sharks within range and lets you enable push notifications for sightings on your active tiles.