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

Installations
COORDINATES
37.79126 N, -122.27828 E
Port Information
Téléphone
Berth Sizes
10-20m, 20m+
Profondeur à la marée basse moyenne
2 - 3m
Manœuvrabilité
Good
Channel Marking
Excellent
Overseas Visitor Berths
Yes
Amarrages pour catamarans
Yes
Type de quai
Floating
Style Side To
Yes
Style Stern To
Yes
Tidal Flow
Negligible
Active Winter
Yes
Weather Forecast
Wed
5AM - 9AM
11 February 2026
- SE 12 knots decreasing to 10 knots. Gusts up to 23 knots.
- 11°C
- S 0.5m at 4s period
- UV Index: 0 - Low
- Cloudy
Wed
9AM - 1PM
11 February 2026
- S 8–13 knots. Gusts up to 20 knots.
- 12°C
- S 0.4m at 4s period
- UV Index: 0 - Low
- Chance of showers
Wed
1PM - 5PM
11 February 2026
- S 11 knots decreasing to 8 knots. Gusts up to 19 knots.
- 12°C
- Calm sea
- UV Index: 0 - Low
- Chance of showers