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
Electricity
Water
Wifi
Showers
Sewage
Toilets
Food
LaundryCOORDINATES
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
Wed
5AM - 9AM
18 February 2026
Light and variable.
Increasing from −1 to 6°C
W 0.4m at 10s period
Sunny
Wed
9AM - 1PM
18 February 2026
- W 7 knots increasing to 11 knots. Gusts up to 20 knots.
- 6 to 10°C
- W 0.5m at 8s period
UV Index: 1 - Low- Chance of showers
Wed
1PM - 5PM
18 February 2026
- W 9–14 knots. Gusts up to 21 knots.
- 9°C
- W 0.5m at 8s period
- UV Index: 1 - Low
- Partly cloudy