Pacific Northwest, United States

    Marina Reef

    Best months: Sep–Jan

    Why dive here

    With 35+ marine species recorded in the area - including humpback whales, orcas and seals & sea lions - Marina Reef offers some of Pacific Northwest's richest reef diving. Water ranges 7-17°C, warmest July, August, September.

    Best timeSep–Jan
    WetsuitA drysuit
    Marine lifeHumpback Whales, Orcas and Seals & Sea Lions · 35+ species recorded
    Water7-17°C · warmest July, August, September
    CharacterReef dive

    Marina Reef, up in the Pacific Northwest, is a site we’ve always had a soft spot for. Forget the tropical blues; this is a place that celebrates the moody, green-tinged beauty of cold-water diving. The reef here isn't coral, of course, but a rugged, rocky landscape adorned with anemones and the occasional patch of eelgrass. It’s an easy dive, often shallow enough that you can spend a good hour exploring without pushing limits, making it perfect for a relaxed afternoon. What makes Marina Reef special, for us, are those oddball creatures you just don't see elsewhere. We love spotting the Snake Prickleback, a slender fish that weaves through the rocks, or the genuinely bizarre Spotted Ratfish, with its whip-like tail and peculiar snout. Keep an eye out for Pacific Glass Shrimp, almost invisible against the rock, and the Plainfin Midshipman, often tucked into crevices, glowing faintly. If you hit it at the right time of year, we’ve seen young Chinook and Coho salmon darting through the shallows. Our favourite is the massive Sunflower star, a multi-armed giant slowly cruising the seafloor. It’s a site for the patient observer, for divers who appreciate the subtle drama of a temperate reef.

    Safety Notes

    Cold water this month (avg 11°C). Drysuit or thick wetsuit (7mm+) recommended.

    Today06:3517:4111h 6m daylightGolden hour 16:57

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    Conditions

    Ocean conditions, forecast and tides for Marina Reef

    Marina Reef Ocean Conditions

    Monthly averages for Marina Reef, sourced from NOAA NDBC + Copernicus Marine (EU) - nearest station: 9449880 - Friday Harbor, WA (27km away)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    October Averages

    Sea Temperature

    11°C

    53°F · Range: 9.6–11.4°C

    Air Temperature

    11°C

    51°F

    Current Speed

    3.16 cm/s

    Direction: E (108.4°)

    Salinity

    23.61 PSU

    Wind Speed

    1.8 m/s

    3.5 knots

    Atmospheric Pressure

    1018.3 hPa

    Based on 5 years of monitoring data · Data sources: NOAA NDBC + Copernicus Marine (EU)

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