Pacific Northwest, United States

    Grant Reefs

    Best months: Sep–Jan

    Why dive here

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

    Grant Reefs, a standout in the Pacific Northwest, feels like stepping back in time to an older, wilder ocean. We love the sheer density of life here, especially the invertebrates. Forget everything you think you know about Pacific Northwest diving; this place is different. Descending into the cool, green embrace, you're immediately struck by the sheer number of sunflower stars – we've seen them carpeting the rocks, slowly moving their dozens of arms across the substrate. It’s a sensory overload, watching the Pacific glass shrimp flit nervously amongst the fronds of kelp, or spotting a shy brown catshark tucked into a crevice. The current can be brisk, so pick your slack tide carefully, but that movement is what brings in the nutrient-rich water and, with it, the critters. Our favourite moments are often spent just hovering, watching shiner perch dart through the kelp forest, or catching a glimpse of a spotted ratfish gliding by. This site is perfect for photographers, especially macro enthusiasts, and divers who appreciate the subtle beauty of a thriving, cold-water ecosystem. It’s a real working reef, full of intricate details and constant, quiet drama. You’ll leave feeling like you’ve been let in on a secret.

    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 Grant Reefs

    Grant Reefs Ocean Conditions

    Monthly averages for Grant Reefs, 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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