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Sign-Up for Marina Updates via Text

Get important marina updates straight to your phone! Harbor Island Marina is excited to announce urgent marina updates, events, and important news via SMS text. Text "water" to 206-428-7589 to sign-up. Text "stop" at any time to stop receiving updates. Contact the marina office at 206-787-3006 when needed.

Updated Sublease Policy Starting in 2018

We have made some changes to the sublease policy, which are highlighted in this sublease letter. Additional details can be found within the newly updated Shilshole Bay Marina Moorage Tariff #6, available on the website by January 1, 2018.

We are no longer posting the list of current customers who wish to sublease their slip on the marina bulletin board. Instead, interested sublessees will be directed to the marina office. Once we have obtained the required documentation from the potential sublessee, as listed in the sublease letter, for subleases of seven days or longer, we will provide the sublessee the list of moorage customers interested in subleasing their slips. We hope you will appreciate this improvement so that only customers who meet marina moorage requirements will be able to contact you directly.

Join the Marina Watch

Harbor Island Marina has a marina watch program. If you are interested in being a part of the program, please contact Business & Operations Manager Giuseppe Alvarado at 206-787-3914 or

Parking Policy

New Harbor Island Marina Parking Policy

Vessel Insurance Requirements and Instructions

Download the complete details here.

We're Green!

Harbor Island Marina is a "Clean Marina" and EnviroStar Washington certified marina, earning the highest 4-star rating for preventing pollution and reducing hazardous waste. Learn more about EnviroStars and the Clean Marina Program. Read our Environmental Required Management Practices.

$25 Waitlist Fee for Moorage at Harbor Island Marina

The Port of Seattle implemented a $25 nonrefundable fee to apply to the Wait List for Harbor Island Marina.
If moorage is not available (see moorage availability), you have the option of applying for the waitlist. If you are interested in monthly moorage, download the application here. Please contact marina office if you need an application mailed to you. 
Completed applications may be returned via mail, email, or fax to the address indicated on the application.

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