Port Madison

USPDI🇺🇸USA

Port Location

Port Arrivals & Departures

Vessel Traffic

Port Madison USPDI

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About Port Madison

Port Madison is a marina located on the west shore of Puget Sound in Washington State. It is a sheltered harbor with facilities for pilotage and tugs.

Background
Port Madison, sometimes called Port Madison Bay, is a deep water bay located on the west shore of Puget Sound in western Washington. It is bounded on the north by Indianola, on the west by Suquamish, and on the south by Bainbridge Island. Port Madison connects to Bainbridge Island via the Agate Pass Bridge to the southwest. Two small bays open off Port Madison: Miller Bay to the northwest, and another small bay to the south which, confusingly, is also called Port Madison Bay.

Current Conditions

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Vessel Limits

Tidal Range
2ft
Elevation
4m

Operations & Services

Port of Entry
Unknown
Pilotage Compulsory
Unknown
Tug Assistance
Unknown
Drydock
Unknown
Repair Code
U

References & Identifiers

WPI No.
17260 →
GeoNames ID
7716882 →
Wikidata
Q7230773 →
Wikipedia
Read on Wikipedia →

Identification

UN/LOCODE
USPDI
Country
🇺🇸USA
Time Zone
UTC-8
Feature Type
MAR (Marina)

Classification

Type
Port
Harbor Type
Coastal natural
Shelter
Excellent

Region

Subdivision
US-WA
Latitude
47.7000°
Longitude
-122.5667°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do I navigate the approach to the Port Madison?

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The approach to Port Madison is supported by 5 navigation aids within 50 nautical miles. The nearest is West Point Lighthouse at 5.8 NM to the ESE. Other aids include Alki Point (9.5 NM SE), Swiftsure (10.3 NM ESE), Point No Point (12.8 NM N), Skunk Bay (13.2 NM N). Mariners should consult the relevant chart and List of Lights for full approach details.

What major shipping routes pass near the Port Madison?

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The Port Madison is located within the US West Coast shipping lane — a major trans-Pacific trade route serving West Coast ports of the United States. This strategic position influences vessel traffic density, anchorage availability, and port scheduling.

How do I track vessels arriving at or departing from the Port Madison?

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You can track vessels near Port Madison (USPDI) in real time using MarineRadar. The platform displays live AIS positions of nearby ships, including vessel name, type, flag, speed, and course.

Where is the Port Madison?

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The Port Madison is a port in US. Its UN/LOCODE is USPDI — the five-character code the UNECE assigns to trade and transport locations, and the identifier used on shipping documents and in port calls.

What does the UN/LOCODE USPDI mean?

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The first two characters, US, are the ISO country code for US. The remaining three identify the location within that country. The code is issued by the United Nations Economic Commission for Europe and is the international standard for naming ports in trade and transport systems.

What are the operating hours and time zone for the Port Madison?

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The Port Madison operates in the UTC-8 time zone. Operating hours, VTS schedules, and pilot availability vary — vessel agents should confirm with the port authority in advance, especially for night arrivals or weekend operations.