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Middle Sister Island Lighthouse

Fl Green 4s🇨🇦Town of Essex, CAOperational

Location & Light Range

About Middle Sister Island Lighthouse

A white, square skeletal tower stands 23.5 meters tall on Middle Sister Island, guiding vessels on Lake Erie. The tower's focal height reaches 26 meters, and it emits a green flash every 4 seconds, visible for 14.5 nautical miles. This 4-hectare island lies in the western part of the lake, just north of the international boundary. The lighthouse is operational, though the island and tower are not open to the public. The island was listed for sale in 2025.

Why it matters: The lighthouse is critical for safe passage through the western end of Lake Erie, especially for vessels navigating near the international border, and helps delineate shipping lanes.

Light & Optic

Characteristic Signature
Fl Green 4s
Flash Type
Flashing
Light Color
Green
Interval
4s
Raw Code
Fl G 4s
Focal Height
26m
Geographic Range
14.5NM

Construction & History

Significant events: Island for sale in 2025

References & Identifiers

Nearest Port
Monroe(15.1 km)
USCG No.
7-6875
ARLHS No.
CAN-1008

Tower & Structure

Tower Height
23.5m
Tower Shape
square
Tower Color
white

Structure: square skeletal tower painted white

Location

City
Town of Essex
Country
🇨🇦Canada
Region
Ontario
Sea Region
Middle Sister Island, a 4-hectare island in the middle of the west end of Lake Erie, just north of the international border.
Latitude
41.8487°
Longitude
-82.9997°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Middle Sister Island Lighthouse at night?+
Middle Sister Island displays the characteristic Fl Green 4s. 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 green color may indicate a specific sector or warning zone.
Which ports and harbors does Middle Sister Island Lighthouse guide vessels into?+
Middle Sister Island Lighthouse assists vessels approaching 5 nearby ports. The closest is COLCHESTER SOUTH at 8.7 NM to the NNE. Other ports served include LAKE ERIE METRO PARK (14.9 NM NW), LAKE POINTE (15 NM NW), Amherstburg (15.9 NM NNW), Grosse Ile (16 NM NNW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Middle Sister Island Lighthouse still active and maintained?+
Yes, Middle Sister 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 Middle Sister Island Lighthouse?+
You can track vessels near Middle Sister 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.