Submarius Open the app →
Spearfishing · 19 coastal destinations

Spearfishing conditions by location

Live marine conditions, water-clarity forecasts, tide and moon windows, and a single go/no-go verdict for every coastal spearfishing destination we cover. Free, no signup.

Rhode Island

1 spot

New York

1 spot

North Carolina

1 spot

Florida

7 spots
Key Largo
Florida Keys

Diving capital of the US. Crystal-clear tropical water, shallow patch reefs, and deep wrecks including the Spiegel Grove and Duane. Consistently 30–80ft viz in summer, more volatile in winter.

Typical summer viz · 30–80 ft
Islamorada
Florida Keys

Sportfishing capital of the world. Deep water close to shore, the edge of the Gulf Stream within a short run. Sailfish winter push, mahi summer runs.

Typical summer viz · 30–70 ft
Key West
Florida Keys

Southernmost reef structure in the continental US. Marquesas and Dry Tortugas trips for permit, tarpon, and offshore pelagics. Shallower patch reefs inshore for snapper and grouper.

Typical summer viz · 30–80 ft
Jupiter
Southeast Florida

Deep ledge runs just offshore, plus the inlet drift for big snook and tarpon. Strong Gulf Stream influence — pelagics push close in when conditions align.

Typical summer viz · 40–90 ft
Pompano Beach
Southeast Florida

Shipwreck alley — dozens of intentionally sunk wrecks within 20 minutes of the inlet, plus the world's largest artificial reef project. Year-round diving, reliable sailfish in winter.

Typical summer viz · 40–80 ft
Miami
Southeast Florida

Haulover, Government Cut, and the edge of the Gulf Stream just minutes offshore. Sailfish, kingfish, and mahi runs year-round. Bonefish flats in Biscayne Bay on the back side.

Typical summer viz · 30–70 ft
Destin
Florida Panhandle

"World's luckiest fishing village." Deep water closer to shore than most Gulf ports. Red snapper mecca in season, cobia push in spring, offshore tuna trips year-round.

Typical summer viz · 20–60 ft

Alabama

1 spot

Texas

1 spot

California

4 spots

Hawaii

3 spots

How Submarius handles spearfishing

Every location page shows the same thing: live wind, swell, tide, and water-clarity data pulled from free public sources (Open-Meteo Marine, NOAA, NOAA CoastWatch, USGS Water Services) — aggregated into one verdict you can read in a second. Every factor is tappable for the full reasoning. No black-box AI claims.

Water clarity forecast

How the Submarius clarity model works — satellite data, river plumes, and post-dive reports.

Bite score

What the 0–10 number means, which signals it uses, and why most other bite scores are wrong.

Spearfishing app

The full pitch — what Submarius does for spearfishing and how it compares to other apps.

Common questions

Does Submarius work for freediving and shore spearfishing too?

Yes. The water-clarity forecast, tide and moon windows, and bottom-temperature layers apply equally to boat spearfishing, shore diving, and freediving. Spot privacy (with GPS fuzzing by default) is a first-class feature — we never display precise dive coordinates on public shares.

How accurate is the water-clarity forecast for spearfishing?

Our day-1 model is physically grounded in published oceanography (Lee 2015 Kd490-to-Secchi, R²=0.96 in the reference literature). Every forecast carries explicit uncertainty bounds. Post-dive reports from the community feed a quantile-regression model that sharpens local predictions over time.

Is there a free tier?

Yes. Current conditions, a 2-day forecast, basic bite score, and all safety features (shark alerts, buddy GPS, SOS) are permanently free. Pro ($12.99/mo, $99/yr, or $149 lifetime) adds the 10-day forecast, premium overlays, offline maps, and full water-clarity horizons.

Ready to check today's conditions?

Live data. Honest verdict. No signup.