Visibility history for 4 Mile Rock Barges

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Visibility history

Typically, visibility at 4 Mile Rock Barges is about 25 ft (range 15–35 ft), based on 4 pnwdiving reports from 2024 through 2026.

Seasonal visibility chart for 4 Mile Rock Barges. Typical visibility by month includes Jan 15 ft, Jun 25 ft, Sep 35 ft.

Typical visibility by month at 4 Mile Rock Barges
Month	Typical visibility (ft)
Jan	15
Jun	25
Sep	35

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6/19/2025