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Map of Fort Wetherill State Park
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Fort Wetherill State Park

Rhode Island, United StatesDirections
Open Water suggested3–27 m (10–90 ft) depthShore entry7mm or semi-dry + hood typical

Fort Wetherill State Park at a glance

Fort Wetherill State Park is an advanced shore dive site in Rhode Island, United States with depths of 3–27.4 m (10–90 ft). Typically most favorable Jul · from 3 years of archive data. Divers commonly see Cunner, Tropical strays (butterflyfish, jacks), and Tautog (blackfish). Recent reports put the water around 16°C (60°F). Check the latest conditions and entry details before you go.

Favorable window now· until 18:00 · sunset 17:48

Forecast for this hour · 16:00 · run 15 h ago
0.6 m (2.1 ft)waves — under a meter expected (waves — about two feet expected)

Tap a factor for its source and model point · Forecast 16°C · seasonal avg 17°C ( · Forecast 60°F · seasonal avg 63°F)

Site hazards: Variable visibility (0-15 ft); boat traffic near the boat ramp; rocky bottom and slippery rocks on the cliff-path entries; current and surge at Bull Point and outside the coves; cold water most of the year; fishing line entanglement on the rocks.

Read the full hazards ↓

Dive windows this week

Mon8:00–18:00 favorable

0.6 m waves · 6 kn wind (1.8 ft waves · 6 kn wind)

Tue8:00–18:00 favorable

0.7 m waves · 9 kn wind (2.2 ft waves · 9 kn wind)

Wed8:00–18:00 favorable

0.5 m waves · 4 kn wind (1.5 ft waves · 4 kn wind)

Thu8:00–18:00 favorable

0.5 m waves · 9 kn wind (1.5 ft waves · 9 kn wind)

Fri8:00–10:00 moderate, 10:00–18:00 favorable

0.7 m waves · 9 kn wind (2.2 ft waves · 9 kn wind)

Sat8:00–18:00 favorable

0.4 m waves · 7 kn wind (1.4 ft waves · 7 kn wind)

Sun8:00–18:00 favorable

0.6 m waves · 7 kn wind (2.1 ft waves · 7 kn wind)

Favorable windowModerate window— no window

Every forecast dive window each day, site-local time, from wave and wind forecasts. Numbers under each bar are daylight averages.

First light 6:41 · Sunrise 7:10 · Sunset 17:48 · some windows run past sunset

Source: Open-Meteo marine · model point 12 km from site · updated 26 Oct, 01:21 GMT-4

Forecast only — always assess conditions on site.

Compare this weekend’s windows near Fort Wetherill State Park

Forecast · NOAA tide model

Tide & slack timing

Loading tide predictions

Recent diver reports

Dated firsthand observations from divers — not current conditions.

No diver reports for this site yet. — one dated observation helps every diver after you.

Dived here today — did the forecast match?

What Divers Say

Known for: Cunner, Tautog (blackfish), American lobster
Best time: Diveable year-round; late summer and early fall bring the warmest water, best visibility and seasonal tropical strays carried by the Gulf Stream. Calm shoulder-season days are good for the cove entries.

Based on community reviews and site data. Conditions vary — always verify before diving.

Best months, historically

What conditions have historically been typical at this site, month by month — not a forecast.

  1. January, 68% of days have historically been favorable, water has typically been 6°C (43°F), waves have typically been 1.4 m (4.7 ft), wind has typically been 13 knots
  2. February, 67% of days have historically been favorable, water has typically been 5°C (40°F), waves have typically been 1.4 m (4.5 ft), wind has typically been 12 knots
  3. March, 67% of days have historically been favorable, water has typically been 5°C (42°F), waves have typically been 1.5 m (4.8 ft), wind has typically been 13 knots
  4. April, 71% of days have historically been favorable, water has typically been 8°C (46°F), waves have typically been 1.3 m (4.2 ft), wind has typically been 12 knots
  5. May, 89% of days have historically been favorable, water has typically been 12°C (54°F), waves have typically been 1.1 m (3.4 ft), wind has typically been 11 knots
  6. June, 96% of days have historically been favorable, water has typically been 16°C (62°F), waves have typically been 1.0 m (3.2 ft), wind has typically been 10 knots
  7. July, 98% of days have historically been favorable, water has typically been 21°C (70°F), waves have typically been 0.9 m (3.1 ft), wind has typically been 10 knots, historically most favorable
  8. August, 90% of days have historically been favorable, water has typically been 21°C (70°F), waves have typically been 1.0 m (3.4 ft), wind has typically been 10 knots
  9. September, 89% of days have historically been favorable, water has typically been 21°C (69°F), waves have typically been 1.1 m (3.5 ft), wind has typically been 10 knots
  10. October, 86% of days have historically been favorable, water has typically been 17°C (63°F), waves have typically been 1.2 m (3.9 ft), wind has typically been 11 knots
  11. November, 71% of days have historically been favorable, water has typically been 13°C (56°F), waves have typically been 1.2 m (4.0 ft), wind has typically been 13 knots
  12. December, 67% of days have historically been favorable, water has typically been 9°C (48°F), waves have typically been 1.5 m (4.9 ft), wind has typically been 12 knots

July has typically had the largest share of favorable days here. Conditions vary year to year — this is historical context, not a forecast.

Based on 3 years of archive data. Bar height shows the share of days each month whose conditions have historically scored favorably.

Marine life recorded at this site, by month

Recorded observations — evidence of past sightings, not a promise of what you’ll encounter.

Species seen here

Rough labels: “Commonly seen” usually means two or more recorded sightings near this site in public dive logs (GBIF), “Occasionally seen” one; “Seasonal” and “Rarely seen” come from dive-guide research. Not a measured rate.

  • Centropristis striata recorded here Jun (1 record)

    most recent 2012

  • Homarus americanus recorded here May (1 record)

    most recent 2004

  • Leucoraja ocellata recorded here Jul (1 record)

    most recent 2007

  • Limanda ferruginea recorded here Jun (1 record)

    most recent 2012

  • Limulus polyphemus recorded here May (1 record)

    most recent 2004

  • Pinfish recorded here Sep (1 record)

    Lagodon rhomboidesmost recent 2009

  • Pseudopleuronectes americanus recorded here Sep (1 record)

    most recent 2009

Newest record here: 2012. Counts are occurrence records near this site from public biodiversity datasets (GBIF), grouped by calendar month across all sampled years. Sightings vary — past records are context, not a prediction.

Fills & rentals nearby

Facts from OpenStreetMap, corrected by the community — listed by distance only. Details change; confirm with the shop.

Shop facts come from OpenStreetMap and community corrections, shown nearest first. PickADive lists facts and contacts only — no listing is sponsored or ranked.

Data updated June 2026

Site details

Fort Wetherill State Park in Jamestown is Rhode Island's most popular shore dive and the traditional checkout-dive site for the region, with two sheltered rocky coves flanking a former coastal artillery fort on Narragansett Bay's East Passage. The Right Cove offers an easy boat-ramp entry to about 30 ft, the Left Cove reaches roughly 60 ft, and advanced divers can work out to the Bull Point wall approaching 100 ft. Rocky reef, kelp and abundant New England marine life make it a year-round training and night-dive favorite.

reefshorewall

Variable visibility (0-15 ft); boat traffic near the boat ramp; rocky bottom and slippery rocks on the cliff-path entries; current and surge at Bull Point and outside the coves; cold water most of the year; fishing line entanglement on the rocks.

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