Scuba Diving · Southern California

Scuba Diving in San Diego

Kelp forests for white seabass and halibut, plus offshore runs to the Coronado Islands and the Tanner Bank. Cool Pacific water year-round; vis improves with offshore winds.

Live conditions, water-clarity forecast, and water temperature for scuba diving in San Diego, 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: Oct 5, 2026

Visibility

20 ft

12–31 ft range

Water

73°F

Wind

1 kts

Wave

2.2 ft

Swell

1.8 ft

Period

11.3s

Snapshot from Oct 5, 2026. Live values, factor breakdowns, and 8-day forecast in the app.

Notable species

San Diego is known for:

White SeabassCalifornia HalibutYellowtailCalico BassRockfish

Typical water visibility

Summer visibility around San Diego is commonly reported in the 10–40 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 →

Last 7 days of model reads

One model estimate recorded each morning (UTC) for San Diego. These are model estimates, not measurements; the low and high columns are the p10 to p90 range around the middle estimate.

Day	Low ft	Estimate ft	High ft
Oct 5	12	20	31
Oct 4	12	20	30
Oct 3	12	19	29
Oct 2	12	19	28
Oct 1	12	19	29
Sep 30	13	19	27
Sep 29	13	21	30

Table baked Oct 5, 2026; days the recorder missed are simply absent.

Clearest months at San Diego

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	30	low
Feb	20	30	low
Mar	13	30	low
Apr	13	23	low
May	20	23	low
Jun	17	23	low
Jul	20	28	low
Aug	18	27	low
Sep	20	30	low
Oct	20	31	low
Nov	21	33	low
Dec	21	33	low

Ceiling artifact global-reef-v10-obis-world; table baked Oct 5, 2026.

What Submarius shows for San Diego

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.
Water clarity forecast. Secchi-depth estimate with uncertainty bounds and the next best vis 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 San Diego specifically, the app shows any recent tagged sharks within range and lets you enable push notifications for sightings on your active tiles.