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Rosario Beach

Rosario Beach

Washington, United States

Depth
Depth Icon

20m

Visibility
Visibility Icon

8m - 23m

Entry
Shore Entry Icon

Shore

Experience Level

Beginner

Rosario Beach

Washington, United States

Rosario Beach
Depth
Depth Icon

20m

Visibility
Visibility Icon

8m - 23m

Entry
Shore Entry Icon

Shore

Experience Level

Beginner


About Rosario Beach

Rosario Beach is a stunning shore entry dive located in Rosario Strait off of Fidalgo Island (the west coast side) and not too far from the town of Dewey in the US state of Washington. Plenty of boulders and rocky outcrops provide spectacular topography and great photo opps for macro and micro underwater photography. The shore entry is easy enough for all including novice divers. Loads of interesting gullies to explore.

Rosario Beach Dive Info

Terrain & Features

Rock, Night

Entry Type

Shore

Max Depth

20m

Visibility Range

8m 23m

Experience Level

Beginner

Best Gas Mix

21% – 47%

O2

12% at 18m / 36%

O2
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Photo gallery

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Marine Life

  • Eels
  • Juvenile Marine Life
  • Nudibranchs
  • Octopus
Weather Conditions

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Dive Operators near Rosario Beach

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Location

Dive Site Hazards

  • Bubble Trapping Under Overhangs — Rock overhangs can trap exhaled bubbles, reducing visibility and causing disorientation.

  • Reflected Surge Patterns — Surge reflecting off rock faces can create irregular and unpredictable water movement.

  • Current Funnel Effect — Narrow gaps between rocks can accelerate water flow unexpectedly.

  • Landmark Misidentification — Familiar sites can become unrecognisable at night.

  • Light-Induced Tunnel Vision — Focused light beams reduce peripheral awareness.

  • Depth Perception Errors — Reduced ambient light increases depth perception mistakes.

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