Spearfishing · New England

Spearfishing in Block Island

Legendary striped bass fishing, especially on the southwest side. Clear-for-the-northeast water, boulder structure, and deep channels.

Live conditions, water-clarity forecast, and bite-window timing for spearfishing in Block Island, RI. Open the app for a live verdict, tappable factor breakdown, and an 8-day forecast — free, no signup needed.

Open live conditions →

Conditions snapshot — May 31, 2026

Water

55°F

Wind

11 kts

Wave

3.1 ft

Swell

1.9 ft

Period

8.2s

Snapshot from May 31, 2026. Live values, factor breakdowns, and 8-day forecast in the app.

Notable species

Block Island is known for:

Striped BassBluefishFalse AlbacoreBonito

Typical water visibility

Summer visibility around Block Island 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 blends satellite turbidity (NOAA CoastWatch Kd490), river-plume detection (USGS), wave-mixing physics, and community post-dive reports to estimate how far you'll actually see tomorrow — with explicit uncertainty bounds, not a seasonal average.

How the clarity forecast works →

What Submarius shows for Block Island

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 Block Island specifically, the app shows any recent tagged sharks within range and lets you enable push notifications for sightings on your active tiles.