About Mariner Square Drystack & Marina
Mariner Square Marina Mariner Square is the first marina in Alameda as you enter the Oakland/Alameda Estuary and is comprised of approximately 50 wet slips that range in size from 40 feet to 150 feet in length. With a mixture of recreational and live-aboards, the marina is a small community of boaters that enjoys our convenient location. Amenities Complimentary Parking Restrooms, Showers and Laundry on site Free Wifi Restaurant on premises Electrical hookup at each slip – 30 and 50 amp Water hookup at each slip Individual, lockable dock boxes Pumpout dock

Facilities
COORDINATES
37.79126 N, -122.27828 E
Port Information
Telephone
Berth Sizes
10-20m, 20m+
Depth at MLW
2 - 3m
Manoeuvrability
Good
Channel Marking
Excellent
Overseas Visitor Berths
Yes
Catamaran Berths
Yes
Dock Type
Floating
Style Side To
Yes
Style Stern To
Yes
Tidal Flow
Negligible
Active Winter
Yes
Weather Forecast
Thu
5PM - 9PM
26 February 2026
- NW 4–6 knots.
- 18 to 21°C
- Calm sea
- Cloudy
Thu
9PM - 5AM
26 February 2026
- Light and variable.
- 14 to 18°C
- Calm sea
- UV Index: 0 - Low
- Cloudy
Fri
5AM - 9AM
27 February 2026
- Light and variable.
- 14 to 16°C
- Calm sea
- UV Index: 0 - Low
- Cloudy