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About Us


Our focus has always been all about boating and watersports fun! The South Arm Marina was established in 2021 as the natural progression and dream marina extension of Summertime Rentals LLC.  We saw a great opportunity and potential in what is the last classic mom and pop waterfront marina on Lake Charlevoix.  Our facility is complete with gas dock, boat ramp, marina slips, pontoon/tritoon sales, boat service and storage facility, and shipstore in the walkout basement of the marina caretaker’s house.  The property was formerly known as Swan Valley Marina and has been a marina since the 1950s.  Our vision is to preserve the character and charm of this beautiful historic marina on the South Arm while revitalizing and updating the marina, facilities, services, and grounds.  It will be a multi-year transformation but we’ve already made enormous strides in just a few years.  In 2024, we became Lake Charlevoix's Bennington Dealer offering the best in premium pontoons & tritoons.  We are beyond excited as Bennington's relentless focus on customer satisfaction and leading quality pontoons and tritoons make the brand a perfect fit for Lake Charlevoix area boaters and the South Arm Marina.


Our mission for South Arm Marina is not much different from the 2003 mission of Summertime Rentals.  We strive to provide our customers with a true “up north” lake experience, unmatched customer service, and we want your boating season to be hassle free.  We understand those that vacation and boat here value their time and we want to take the worry and hassle out of boating. 


We’re your lakeside stop for gas, snacks, boating gear, and all sorts of watersports goods.  Our marine facility is setup to handle most trailerable boats up to 28ft and we can take care of your boat storage, service, and maintenance needs.   We offer Lake Charlevoix's only Dry Slip Valet service with designated valet slips to provide the same level of hassle-free boating as our Summertime Rental customers.  Of course we offer the best in rentals too through our Summertime Rentals site link above.  


The best part of our job is getting to know and hear from our customers!  Please stop in by land or water and and say hello!  

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In case you were wondering... we often get asked is it Summertime Rentals or South Arm Marina?  South Arm Marina is the entire marine facility arm of watersports rental and parent company, Summertime Rentals LLC.  We are still very much highly focused on rentals and have long established our presence as Summertime Rentals since 2003, however, we now offer a lot more services that compliment and coincide with our rental business.  We have always loved the South Arm of Lake Charlevoix, feel it is the best part of the lake, and so the South Arm Marina was born.  In short, if you’re renting something, it's Summertime Rentals but for anything else it is South Arm Marina.  


Information to come!

Revitalization of a hidden gem on Lake Charlevoix's South Arm 

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