California, United States
    Palos Verdes Shoreline

    Underwater Arch

    Best months: Jul–Oct

    Protected Area

    Palos Verdes Shoreline

    Why dive here

    Underwater Arch is a cave dive in California, United States. Water ranges 14-21°C, warmest July, August, September.

    Best timeJul–Oct
    WetsuitA 5mm wetsuit
    Water14-21°C · warmest July, August, September
    CharacterCave dive
    StandoutDramatic cave topography

    The Underwater Arch in California offers a unique experience for divers comfortable with overhead environments. We've found the rock formations here create some interesting swim-throughs and small caverns to explore. Visibility can be a factor, so we'd suggest picking a calm day for the best views of the resident rockfish and anemones clinging to the walls. It’s a good spot for divers looking for something a bit different from a typical reef dive.

    Safety Notes

    Overhead environment - never enter without proper cave/cavern training, redundant equipment, and a guideline.

    Today05:5517:2711h 32m daylightGolden hour 16:54

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    Conditions

    Ocean conditions, forecast and tides for Underwater Arch

    Underwater Arch Ocean Conditions

    Monthly averages for Underwater Arch, sourced from NOAA NDBC buoy data - nearest station: Topanga Nearshore, CA (103) (221km away)

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    October Averages

    Sea Temperature

    19°C

    66°F · Range: 14–23.7°C

    Air Temperature

    18°C

    65°F

    Wave Height

    0.6m

    13.8s period

    Based on 4 years of monitoring data · Data sources: NOAA NDBC buoy data

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