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
Tue
5AM - 9AM
19 May 2026
- Light and variable.
- Increasing from 13 to 18°C
- Calm sea
- UV Index: 0 - Low
- Sunny
Tue
9AM - 1PM
19 May 2026
- Light and variable.
- Increasing from 19 to 26°C
- Calm sea
- UV Index: 8 - Very High
- Sunny
Tue
1PM - 5PM
19 May 2026
- W 5 knots increasing to 12 knots. Gusts up to 21 knots.
- 23 to 28°C
- Calm sea
- UV Index: 8 - Very High
- Sunny