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Slate Islands Lighthouse

Fl White 15s🇨🇦Terrace Bay Township, CAOperational

Location & Light Range

About Slate Islands Lighthouse

This octagonal wood tower, standing 7 meters tall, was first lit in 1902. It is painted white, with a red lantern and gallery. Situated on a high ridge on the south side of Patterson Island, the lighthouse is about 11 kilometers southeast of Terrace Bay. Its focal height reaches 68 meters above the water, providing a geographic range of 21.2 nautical miles. The light emits a white flash every 15 seconds. The site is open to the public, though the tower itself remains closed.

Why it matters: The lighthouse helps mariners navigate the archipelago, forming part of a provincial park.

Light & Optic

Characteristic Signature
Fl White 15s
Flash Type
Flashing
Light Color
White
Interval
15s
Raw Code
Fl W 15s
Focal Height
68m
Geographic Range
21.2NM

Construction & History

Year Built
1902

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
7m
Tower Shape
octagonal
Tower Color
white
Material
wood

Structure: octagonal wood tower with lantern and gallery, painted white; lantern and gallery painted red

Location

City
Terrace Bay Township
Country
🇨🇦Canada
Region
Ontario
Sea Region
The Slate Islands, located about 11 km southeast of Terrace Bay, are included in a provincial park. Lighthouse located on a high ridge on the south side of Patterson Island.
Latitude
48.6220°
Longitude
-86.9960°

References & Identifiers

Nearest Port
Rossport(24.3 km)
USCG No.
7-16865
ARLHS No.
CAN-589
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Frequently Asked Questions

How do mariners identify Slate Islands Lighthouse at night?+
Slate Islands displays the characteristic Fl White 15s. Each lighthouse has a unique flash pattern published in the List of Lights, allowing mariners to positively identify it and distinguish it from other navigation aids in the area. The white color may indicate a specific sector or warning zone.
Which ports and harbors does Slate Islands Lighthouse guide vessels into?+
Slate Islands Lighthouse assists vessels approaching 1 nearby port. The closest is Rossport at 24.2 NM to the WNW. Mariners should consult the relevant chart for full approach and pilotage information.
Is Slate Islands Lighthouse still active and maintained?+
Yes, Slate Islands Lighthouse is currently operational. It is actively maintained and continues to emit its characteristic light signal for marine navigation. Most modern lighthouses are automated and monitored remotely by the national maritime authority.
How can I track vessels near Slate Islands Lighthouse?+
You can track vessels near Slate Islands Lighthouse in real time using MarineRadar. The platform shows live AIS positions of ships in the area, including vessel name, type, flag, speed, and course. Use the "Track Vessels Nearby" button on this page to open the live map centered on this lighthouse.