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Trowbridge Island Lighthouse

Fl White 5s🇨🇦Unorganized Thunder Bay District, CAOperational

Location & Light Range

About Trowbridge Island Lighthouse

The Trowbridge Island Lighthouse was built in 1924 as an octagonal concrete structure standing 7 meters tall. It is painted white with red trim, and its lantern and gallery are also red. The lighthouse emits a single white flash every 5 seconds from a focal height of 35 meters, visible for 16.2 nautical miles. This facility is situated on a small island east of Thunder Cape, serving as a key marker for vessels approaching Thunder Bay. Since 2018, Canadian Lighthouses of Lake Superior has managed the site, following efforts by the Friends of Trowbridge Island Lighthouse to ensure its preservation.

Why it matters: The lighthouse is essential for safe navigation into Thunder Bay, guiding vessels through the waters near Thunder Cape. Its preservation by Canadian Lighthouses of Lake Superior highlights its cultural value as a heritage site.

Light & Optic

Characteristic Signature
Fl White 5s
Flash Type
Flashing
Light Color
White
Interval
5s
Raw Code
Fl W 5s
Focal Height
35m
Geographic Range
16.2NM

Construction & History

Year Built
1924

Significant events: Friends of Trowbridge Island Lighthouse formed, leased by Canadian Lighthouses of Lake Superior, 2018 grant for cleanup

References & Identifiers

Nearest Port
Thunder Bay(14.6 km)
ARLHS No.
CAN-596

Tower & Structure

Tower Height
7m
Tower Shape
octagonal
Tower Color
white with red trim
Material
concrete

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

Location

City
Unorganized Thunder Bay District
Country
🇨🇦Canada
Region
Ontario
Sea Region
small island east of Thunder Cape on the approach to Thunder Bay
Latitude
48.2923°
Longitude
-88.8746°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Trowbridge Island Lighthouse at night?+
Trowbridge Island displays the characteristic Fl White 5s. 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 Trowbridge Island Lighthouse guide vessels into?+
Trowbridge Island Lighthouse assists vessels approaching 5 nearby ports. The closest is Fort William at 15.7 NM to the WNW. Other ports served include Port Arthur (15.7 NM WNW), Thunder Bay (15.7 NM WNW), Grand Portage (38.4 NM WSW), Red Rock (45.9 NM NNE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Trowbridge Island Lighthouse still active and maintained?+
Yes, Trowbridge Island 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 Trowbridge Island Lighthouse?+
You can track vessels near Trowbridge Island 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.