Pacific Northwest, United States

    Humphries Reef

    Best months: Sep–Jan

    Why dive here

    With 35+ marine species recorded in the area - including humpback whales, orcas and seals & sea lions - Humphries 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

    Humphries Reef, up in the Pacific Northwest, is a site we’ve always enjoyed, especially for its genuine cold-water charm. It’s not about vibrant colours here, you’re diving into a world of rich, muted greens and browns, a different kind of beauty. We love the sheer density of life clinging to every surface, particularly those big sunflower stars draped over the rocks. Look closely, and you’ll spot roughpatch shrimp tucked into crevices or a daubed shanny camouflaged perfectly against the substrate. Our favourite finds are always the giant octopuses, sometimes you just see an eye peeking out from under a ledge, other times they’re stretching an arm out to investigate. It’s a site that rewards slow diving, hovering and observing, rather than rushing through. Expect cooler temperatures, around 8-12°C, so a good drysuit is a must. Visibility can vary, but on a good day, it’s a solid 10-15 metres, enough to really appreciate the scale of the reef. We’d suggest a morning dive here, before any boat traffic stirs things up too much. It’s an excellent spot for photographers keen on macro life and patient wide-angle shots of the reef structure.

    Safety Notes

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

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    Conditions

    Ocean conditions, forecast and tides for Humphries Reef

    Humphries Reef Ocean Conditions

    Monthly averages for Humphries 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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