How deep is Mukilteo T-Dock (Lighthouse Park)?

Mukilteo T-Dock (Lighthouse Park) has a depth range of 3–36.6 metres (10–120 feet). Check the dive site page for current conditions and any depth-specific guidance before planning your dive.

Can beginners dive Mukilteo T-Dock (Lighthouse Park)?

Mukilteo T-Dock (Lighthouse Park) is rated as advanced difficulty, which may not suit new divers. A Open Water certification or equivalent is suggested. Consider your experience level, conditions, and local guidance before planning.

What will I see at Mukilteo T-Dock (Lighthouse Park)?

Divers at Mukilteo T-Dock (Lighthouse Park) in United States commonly report sightings of Giant Pacific octopus, Wolf eel, Spotted ratfish, Grunt sculpin, and Shiner perch. Marine life varies by season and conditions—check the site page for recent diver observations and photos.

Map of Mukilteo T-Dock (Lighthouse Park)

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AdvancedShore entry

Mukilteo T-Dock (Lighthouse Park)

Q: When is the best time to dive Mukilteo T-Dock (Lighthouse Park)?

The best time to dive Mukilteo T-Dock (Lighthouse Park) is typically Year-round; weekday or early-morning dives avoid class crowds; night dives are excellent. Conditions vary, so check the latest reports and forecasts on the dive site page before your trip.

Washington, United States

Open Water suggested3–37 m depthShore entry

Mukilteo T-Dock (Lighthouse Park) at a glance

Mukilteo T-Dock (Lighthouse Park) is a advanced shore dive site in Washington, United States with depths of 3–36.6 m (10–120 ft). Typically most favorable Jul · from 3 years of archive data. Divers commonly see Giant Pacific octopus, Wolf eel, and Spotted ratfish. Check the latest conditions and entry details before you go.

Marine model · graded 4h ago

0.2 mwaves — under half a meter expected

Tap a factor for its source and model point

Site hazards: Stay well clear of the active Washington State Ferries terminal immediately south; moderate current including occasional downwelling; theft from vehicles reported - do not leave valuables

Read the full hazards ↓

Dive windows this week

Best: Sun

Sun6:00–21:00

Mon6:00–0:00

Tue—

Wed—

Thu—

Fri—

Sat—

Favorable windowModerate window— no window

First light 5:01 · Sunrise 5:38 · Sunset 20:52

Source: Open-Meteo marine · model point 1.4 km from site · graded 4h ago

Forecast only — always assess conditions on site.

Forecast · NOAA tide model

Tide & slack timing

Recent diver reports

Dated firsthand observations from divers — not current conditions.

No diver reports for this site yet. — one dated observation helps every diver after you.

What Divers Say

Known for: Spotted ratfish, Shiner perch, Dungeness crab

Best time: Year-round; weekday or early-morning dives avoid class crowds; night dives are excellent

Based on community reviews and site data. Conditions vary — always verify before diving.

Best months, historically

What conditions have historically been typical at this site, month by month — not a forecast.

Jan95%8°C0.2 m
Feb80%8°C0.3 m
Mar88%8°C0.3 m
Apr91%9°C0.3 m
May99%11°C0.2 m
Jun98%12°C0.2 m
Jul100%14°C0.2 m
Aug99%14°C0.2 m
Sep99%13°C0.1 m
Oct92%11°C0.2 m
Nov81%10°C0.3 m
Dec78%10°C0.3 m

July hastypically had the largest share of favorable days here. Conditions vary year to year — this is historical context, not a forecast.

Based on 3 years of archive data. Bar height shows the share of days each month whose conditions have historically scored favorably.

Marine life recorded at this site, by month

Recorded observations — evidence of past sightings, not a promise of what you’ll encounter.

Species seen here

Giant Pacific octopusOccasionally seen
Wolf eelOccasionally seen
Spotted ratfishCommonly seen
Grunt sculpinOccasionally seen
Shiner perchCommonly seen
Dungeness crabCommonly seen
Sea cucumberCommonly seen
Harbor sealOccasionally seen

Dermasterias imbricata recorded here Jan (3 records)
most recent 2014
Henricia sanguinolenta recorded here Jan (3 records)
most recent 2014
Pisaster ochraceus recorded here Jan (3 records)
most recent 2014
Anarrhichthys ocellatus recorded here Jul–Aug (2 records)
most recent 2011

Counts are occurrence records near this site from public biodiversity datasets (GBIF), grouped by calendar month across all sampled years. Sightings vary — past records are context, not a prediction.

Fills & rentals nearby

Facts from OpenStreetMap, corrected by the community — listed by distance only. Details change; confirm with the shop.

Edmonds Underwater Sports16.6 km
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Shop facts come from OpenStreetMap and community corrections, shown nearest first. PickADive lists facts and contacts only — no listing is sponsored or ranked.

Site details

A long-running training and night-dive site beside the Mukilteo ferry terminal and Lighthouse Park, entered from the beach next to the Silver Cloud Inn. A gradual sand slope passes pilings and placed attractions - most famously a PVC-pipe geodome at roughly 50-70 ft - and keeps dropping past 100 ft, making it popular for deep and tech training as well as open-water classes. The original T-shaped dock was removed during ferry terminal construction in the mid-2010s, but the geodome, debris reef and abundant critters remain.

muckreefshore

Stay well clear of the active Washington State Ferries terminal immediately south; moderate current including occasional downwelling; theft from vehicles reported - do not leave valuables

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