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Map of Mukilteo T-Dock (Lighthouse Park)
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Mukilteo T-Dock (Lighthouse Park)

Washington, United StatesDirections
Open Water suggested3–37 m (10–120 ft) depthShore entry

Mukilteo T-Dock (Lighthouse Park) at a glance

Mukilteo T-Dock (Lighthouse Park) is an 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 Sea cucumber, Wolf eel, and Harbor seal. Check the latest conditions and entry details before you go.

Favorable window now· until 19:00 · sunset 18:02

Forecast for this hour · 5:00 · run 7 h ago
0.0 m (0.1 ft)waves — under half a meter expected (waves — under a foot 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

Sun20:00–22:00 favorable

0.0 m waves · 8 kn wind (0.1 ft waves · 8 kn wind)

MonNo window

0.0 m waves · 6 kn wind (0.1 ft waves · 6 kn wind)

TueNo window

0.0 m waves · 3 kn wind (0.1 ft waves · 3 kn wind)

WedNo window

0.2 m waves · 5 kn wind (0.7 ft waves · 5 kn wind)

Thu8:00–0:00 favorable

0.1 m waves · 6 kn wind (0.2 ft waves · 6 kn wind)

FriNo window

0.0 m waves · 4 kn wind (0.1 ft waves · 4 kn wind)

SatNot in the forecast yet

Favorable windowModerate window— no window

Every forecast dive window each day, site-local time, from wave and wind forecasts. Numbers under each bar are daylight averages.

First light 7:12 · Sunrise 7:43 · Sunset 18:02 · some windows run past sunset

Source: Open-Meteo marine · model point 1.4 km from site · updated 24 Oct, 22:25 GMT-7

Forecast only — always assess conditions on site.

Compare this weekend’s windows near Mukilteo T-Dock (Lighthouse Park)

Forecast · NOAA tide model

Tide & slack timing

Loading tide predictions

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.

Dived here today — did the forecast match?

What Divers Say

Known for: Sea cucumber, Spotted ratfish, 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.

  1. January, 95% of days have historically been favorable, water has typically been 8°C (47°F), waves have typically been 0.2 m (0.7 ft), wind has typically been 12 knots
  2. February, 80% of days have historically been favorable, water has typically been 8°C (46°F), waves have typically been 0.3 m (0.9 ft), wind has typically been 14 knots
  3. March, 88% of days have historically been favorable, water has typically been 8°C (47°F), waves have typically been 0.3 m (0.9 ft), wind has typically been 13 knots
  4. April, 91% of days have historically been favorable, water has typically been 9°C (49°F), waves have typically been 0.3 m (0.9 ft), wind has typically been 14 knots
  5. May, 99% of days have historically been favorable, water has typically been 11°C (51°F), waves have typically been 0.2 m (0.6 ft), wind has typically been 12 knots
  6. June, 98% of days have historically been favorable, water has typically been 12°C (54°F), waves have typically been 0.2 m (0.6 ft), wind has typically been 11 knots
  7. July, 100% of days have historically been favorable, water has typically been 14°C (57°F), waves have typically been 0.2 m (0.5 ft), wind has typically been 11 knots, historically most favorable
  8. August, 99% of days have historically been favorable, water has typically been 14°C (58°F), waves have typically been 0.2 m (0.5 ft), wind has typically been 11 knots
  9. September, 99% of days have historically been favorable, water has typically been 13°C (56°F), waves have typically been 0.1 m (0.5 ft), wind has typically been 10 knots
  10. October, 92% of days have historically been favorable, water has typically been 11°C (53°F), waves have typically been 0.2 m (0.8 ft), wind has typically been 13 knots
  11. November, 81% of days have historically been favorable, water has typically been 10°C (51°F), waves have typically been 0.3 m (0.9 ft), wind has typically been 13 knots
  12. December, 78% of days have historically been favorable, water has typically been 10°C (49°F), waves have typically been 0.3 m (1.0 ft), wind has typically been 15 knots

July has typically 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

Rough labels: “Commonly seen” usually means two or more recorded sightings near this site in public dive logs (GBIF), “Occasionally seen” one; “Seasonal” and “Rarely seen” come from dive-guide research. Not a measured rate.

  • 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

Newest record here: 2014. 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.

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

Data updated June 2026

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

Reviews

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