Lake Whatcom
Protected Area
Chuckanut Island
Why dive here
With 35+ marine species recorded in the area - including humpback whales, orcas and seals & sea lions - Lake Whatcom offers some of Pacific Northwest's richest shore diving. Water ranges 7-17°C, warmest July, August, September.
Lake Whatcom is a local favorite for good reason, especially if you're looking for an easy freshwater dive in the Pacific Northwest. We often head here for gear checks or to introduce new divers to the sport; the 11-meter maximum depth means it's pretty forgiving. Visibility can vary, but we've had some surprisingly clear days, offering views of sunken logs and the occasional curious trout. It’s a comfortable, low-stress spot for skill practice or just enjoying a quiet afternoon underwater.
Typical Lake Whatcom Dive Profile
Illustrative profile based on site depth and type. Actual dive profiles vary - always follow your dive computer and training.
Safety Notes
Cold water this month (avg 11°C). Drysuit or thick wetsuit (7mm+) recommended.
Always perform a 3-minute safety stop at 5m before surfacing.
Nearest Dive Centres to Lake Whatcom
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Conditions
Ocean conditions, forecast and tides for Lake Whatcom
Lake Whatcom Ocean Conditions
Monthly averages for Lake Whatcom, sourced from NOAA NDBC + Copernicus Marine (EU) - nearest station: 9449880 - Friday Harbor, WA (27km away)
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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