A ski boat cover with tower is a storage cover designed to protect your entire boat including the wakeboard or ski tower, rather than requiring you to remove the tower or settle for partial coverage. These covers use tower-leg openings, adjustable straps, and full-height construction to accommodate aftermarket and factory-installed towers while keeping moisture, UV damage, and debris off your upholstery, carpet, and gelcoat. If you own a Mastercraft, finding the right Mastercraft boat cover with tower ensures a precise fit for your specific tower configuration.
This guide is for boat owners with tower-equipped ski boats, wakeboard boats, or tournament boats who need a cover that fits over the tower without daily rigging hassles. You'll learn how tower covers differ from standard mooring covers, what measurements determine fit, and how to choose a cover, such as Mastercraft boat covers, that protects your investment without sagging or trapping moisture.
- How ski boat covers with towers work and what makes them different
- Key fit specifications: tower height, placement, and beam limits
- Material and construction features that prevent mildew and wear
- How to measure your boat and tower for the right cover
- What Westland's Select Fit® and Exact Fit® covers offer for tower boats
What Makes a Ski Boat Cover With Tower Different?
A ski boat cover with tower is built taller and wider than a standard mooring cover to clear the tower structure, speakers, racks, and bimini hardware. The cover uses reinforced tower-leg openings with Velcro flaps or drawstring closures to seal around the tower legs, preventing water and debris from entering while keeping the cover snug. This design lets you store your boat fully rigged without removing the tower or exposing the cockpit.
Standard mooring covers stop at the windshield or bow and leave the tower exposed. Tower covers extend over the entire structure, protecting seats, carpet, electronics, and tower-mounted speakers from rain, sun, and bird droppings. The trade-off is that tower covers require precise fit specifications tied to tower height, tower placement, and hull geometry.
Most tower covers are designed for storage at the dock, on a lift, or in a garage. Some are built for trailering, but you'll need to confirm the cover's tie-down system and material weight can handle highway speeds. As of 2026, the market continues to split between full-coverage storage covers and reinforced trailer-rated covers, so check the product specs before assuming your cover works for both.
How Do Tower Height and Placement Affect Fit?
Tower height and placement are the two most restrictive fit variables for ski boat covers. Your tower must fall within the cover's maximum height limit measured from the gunwale to the top of the tower frame. Most semi-custom tower covers specify a maximum tower height of 68 inches above the gunwale, which accommodates the majority of aftermarket wakeboard towers installed over the windshield.
Tower placement matters because the cover's tower-leg openings are positioned based on where the tower mounts. Covers designed for centerline-mounted towers expect the tower to sit directly over or just behind the windshield, typically no more than 24 inches behind the windshield wing. If your tower sits farther aft or mounts to the transom, you'll need a cover patterned for that configuration.
Wide-bow or pickle-fork hull designs add another layer of complexity. These boats have a flared bow shape that changes how the cover drapes over the windshield and tower legs. In 2026, manufacturers continue to offer separate product lines for tournament ski boats with standard bows and wide-bow tower boats, reflecting the ongoing challenge of fitting one cover to multiple hull geometries.
What Are the Key Fit Specifications for Tower Boat Covers?
Centerline length and beam width are the foundation of any boat cover fit, but tower covers add tower height, tower placement, and swim platform extension to the equation. Your centerline length runs from the tip of the bow to the end of the hull, not including the swim platform. Beam width is the widest point of the hull, typically at the windshield or just aft of it.
For tower-equipped boats, you'll also need to measure tower height from the top of the gunwale to the highest point of the tower frame. Measure tower placement as the distance from the aft edge of the windshield to the front tower legs. If your boat has a swim platform, measure how far it extends beyond the transom using our boat cover measurement guide. Most semi-custom tower covers accommodate swim platform extensions up to 30 inches.
Here's what a typical fit specification looks like for a semi-custom tower cover in 2026:
|
Specification |
Example Range |
|---|---|
|
Centerline Length |
21'6" to 23'6" |
|
Beam Width |
Up to 102" |
|
Tower Height |
Up to 68" above gunwale |
|
Tower Placement |
Within 24" aft of windshield |
|
Swim Platform Extension |
Up to 30" |
If your boat falls outside these ranges, you'll need a custom cover or a different size class. Westland's Select Fit® covers are built in size ranges that accommodate the most common tower configurations, while Exact Fit® covers are patterned to specific year, make, and model combinations for factory-installed towers.
Do You Need to Remove Bimini Tops and Wakeboard Racks?
Most tower boat covers require you to fold down your Mastercraft bimini top and fold in your wakeboard racks before installing the cover. The cover is designed to fit over the tower frame, but bimini fabric and extended racks add height and width that the cover can't accommodate. Folding these accessories also prevents stress on the cover fabric and ensures the cover sits snug against the tower legs.
If you leave your bimini up or your racks extended, the cover will either not fit or will stretch and sag in ways that trap water and accelerate wear. Some covers include extra height allowance for folded bimini hardware, but you'll still need to collapse the bimini frame to its lowest profile. Check the product specs to confirm what accessories must be stowed before installation.
Tower-mounted speakers and tower lights typically stay in place. The cover's tower-leg openings and extra height are designed to clear these accessories as long as they sit within the tower's footprint. If you've added custom speaker pods or extended light bars, measure those dimensions and confirm they fit within the cover's tower clearance limits.
What Materials and Construction Features Prevent Mildew?
Marine-grade polyester fabric is the standard material for tower boat covers, typically rated at 300 to 600 denier for durability and water resistance. Higher denier counts resist abrasion and punctures better, but the fabric's breathability matters more for mildew prevention. A cover that traps moisture inside will destroy your upholstery faster than UV exposure ever could.
Sewn-in ventilation is the most effective way to prevent mildew. Westland builds ventilation directly into the cover seams during construction, allowing moisture to escape while keeping rain and debris out. This isn't an add-on vent or a zippered flap. It's part of the cover's structure, so it works continuously without you adjusting anything.
Look for double-stitched seams with marine-grade thread. The seams take the most stress from wind, trailering, and repeated installation. Reinforced tower-leg openings with Velcro or drawstring closures prevent tearing around the tower legs. Elastic hems and adjustable straps keep the cover snug without over-tensioning the fabric. A well-built cover should last five to seven years with proper care, not one or two seasons before the seams fail.
How Do Semi-Custom and Exact Fit Covers Compare?
Semi-custom covers like Westland's Select Fit® line are built in size ranges based on centerline length, beam width, and tower configuration. You measure your boat, choose the size range that fits, and the cover ships in two to three days. Semi-custom covers fit the vast majority of tower-equipped boats because they're patterned around common hull shapes and tower placements.
Exact Fit® covers are patterned to a specific year, make, and model with a factory-installed tower. You select your boat from Westland's database, and the cover is guaranteed to fit that exact configuration. Exact Fit covers eliminate guesswork for boats with unique hull shapes, integrated tower mounts, or factory tower designs that don't follow aftermarket standards.
The trade-off is availability and price. Semi-custom covers ship faster and cost less because they're built in volume. Exact Fit covers take longer to produce and cost more because they're patterned individually. For aftermarket towers, Select Fit is usually the right choice. For factory towers on newer boats, Exact Fit gives you the tightest possible fit without custom fabrication.
What Fit Challenges Do Tower Boats Create?
Tower boats are tough to fit because tower geometry varies widely across brands, models, and installation years. Aftermarket towers mount at different heights, angles, and positions depending on who installed them and what the boat owner requested. Factory towers follow the boat manufacturer's specs, but those specs change year to year as hull designs evolve.
Westland has spent nearly 40 years patterning covers for tower boats, working directly with boat manufacturers and tower suppliers to understand how these variables affect fit. That's why Westland offers both semi-custom and guaranteed-fit options. The semi-custom approach works for most boats. The guaranteed-fit approach handles the outliers.
The biggest mistake boat owners make is assuming a tower cover will fit just because the centerline length matches. Tower height, tower placement, beam width, and swim platform extension all matter. If any one of those specs falls outside the cover's range, the cover won't fit correctly. Measure everything before you order, and call Westland's marine canvas experts if your boat has custom tower modifications or an unusual hull shape.
How Much Do Tower Boat Covers Cost in 2026?
Semi-custom tower boat covers in 2026 typically cost between $600 and $700 for standard marine-grade polyester. Covers made from Sunbrella or Outdura fabric run higher due to the premium material cost and longer UV resistance. You'll see pricing clusters around $599 to $698 for centerline lengths between 21'6" and 23'6", which covers most tournament ski boats and wakeboard boats.
Westland's Select Fit® covers fall into this range and include sewn-in ventilation, reinforced tower-leg openings, and double-stitched seams as standard features. You're not paying extra for mildew prevention or construction quality. Those features are built in because that's how Westland builds every cover.
Custom covers or covers for larger boats with extended swim platforms and taller towers cost more. If your boat requires a fully custom pattern, expect to pay $800 to $1,200 depending on size and fabric choice. The price reflects the time required to pattern, cut, and sew a one-off cover that fits your specific configuration.
How Do You Measure Your Boat for a Tower Cover?
Start with centerline length. Measure from the tip of the bow to the aft end of the hull, not including the swim platform. Use a tape measure along the centerline of the boat, keeping the tape straight and level. Round up to the nearest inch.
Measure beam width at the widest point of the hull, typically at or just behind the windshield. This is the hull width, not the overall width including rub rails or fenders. Measure from the outside edge of one gunwale to the outside edge of the opposite gunwale.
For tower height, measure from the top of the gunwale to the highest point of the tower frame. If your tower has a bimini top, measure with the bimini folded down. For tower placement, measure from the aft edge of the windshield to the front tower legs. If your boat has a swim platform, measure how far it extends beyond the transom.
Write down all five measurements before you start shopping. If your boat falls between two size ranges, call Westland's team. They'll confirm which size fits your configuration or recommend a custom cover if your measurements fall outside standard ranges.
What Accessories and Features Should You Look For?
Reinforced tower-leg openings with adjustable closures are non-negotiable. The tower legs are high-stress points where the cover flexes and rubs against the tower frame. Velcro flaps, drawstring closures, or reinforced grommets keep the cover sealed around the legs without tearing the fabric.
Elastic hems and adjustable straps let you tension the cover without over-stretching the fabric. A loose cover flaps in the wind and wears out faster. An over-tensioned cover stresses the seams and tears at the tie-down points. Adjustable systems let you dial in the right tension for your boat's shape.
Sewn-in ventilation prevents mildew by letting moisture escape continuously. This isn't the same as a vent flap you open and close. Sewn-in vents are built into the cover's seams, so they work 24/7 without you adjusting anything. Westland's covers include this feature as standard because mildew damage costs more than the cover itself.
A storage bag keeps the cover clean and protected when you're not using it. UV-resistant thread and marine-grade zippers add durability. Tie-down straps with quick-release buckles make installation faster. These aren't luxury features. They're the difference between a cover that lasts five years and one that fails in two.
Can You Use a Tower Cover for Trailering?
Some tower covers are rated for trailering, but most are designed for storage only. Trailering a boat at highway speeds puts stress on the cover that storage covers aren't built to handle. Wind lifts the cover, straps stretch, and seams tear if the cover isn't reinforced for trailering.
If you need a cover for trailering, confirm the product specs say "trailerable" or "highway rated." Look for extra tie-down straps, reinforced stress points, and heavier fabric weight. A storage cover used for trailering will fail quickly, and the warranty won't cover damage from improper use.
For boats stored on a lift or at the dock, a storage-rated cover is the right choice. It's lighter, easier to install, and costs less than a trailerable cover. If you trailer your boat regularly, invest in a cover built for that purpose. Westland offers both storage and trailering covers, so confirm which type you need before ordering.
How Does Westland's Approach to Tower Boats Differ?
Westland has been patterning covers for tower boats since aftermarket wakeboard towers became common in the early 2000s. That's more than 20 years of fit data, tower geometry, and real-world feedback from boat owners who've tried cheaper covers and watched them fail. Westland's Select Fit® covers use tower-leg openings, adjustable closures, and size ranges built around the most common tower configurations.
For boats with factory-installed towers, Westland's Exact Fit® covers are guaranteed to fit your specific year, make, and model. You don't measure anything. You select your boat from the database, and the cover ships with a fit guarantee. If it doesn't fit, Westland replaces it.
Every Westland cover includes sewn-in ventilation, double-stitched seams, and marine-grade materials as standard features. You're not paying extra for mildew prevention or construction quality. That's how Westland builds covers, whether you're buying a Select Fit cover for $650 or an Exact Fit cover for a specific boat model.
Westland's marine canvas experts are based in Vonore, Tennessee, not a call center. If your boat has a custom tower or an unusual configuration, call the team. They'll walk you through the measurements, confirm fit, or recommend a custom cover if your boat falls outside standard ranges. That's the difference between a brand that's been building covers for nearly 40 years and one that's reselling imports.
Frequently Asked Questions
Do tower boat covers fit all tower types?
No. Tower boat covers are designed for specific tower heights, placements, and mounting styles. Most semi-custom covers fit aftermarket towers mounted over the windshield within 24 inches aft of the windshield wing, with tower heights up to 68 inches above the gunwale. Factory towers may require an Exact Fit® cover patterned to your boat's year, make, and model.
Can you leave speakers and lights on the tower when using a cover?
Yes, as long as the speakers and lights sit within the tower's footprint and don't extend beyond the tower frame. The cover's tower-leg openings and extra height are designed to clear standard tower-mounted accessories. Custom speaker pods or extended light bars may require additional clearance, so measure those dimensions before ordering.
How do you prevent mildew under a tower boat cover?
Choose a cover with sewn-in ventilation that allows moisture to escape continuously. Avoid covers that rely on zippered vents or flaps you have to open manually. Make sure the cover fits snug without sagging, which traps water. Clean and dry your boat before covering it, and inspect the cover periodically to confirm ventilation is working.
What's the difference between a mooring cover and a tower cover?
A mooring cover stops at the windshield or bow and leaves the tower exposed. A tower cover extends over the entire tower structure, protecting seats, carpet, electronics, and tower-mounted accessories. Tower covers require precise fit specifications tied to tower height, placement, and hull geometry, while mooring covers only need centerline length and beam width.
How long do tower boat covers last?
A well-built tower cover with marine-grade fabric, double-stitched seams, and sewn-in ventilation should last five to seven years with proper care. Covers made from cheaper materials or without reinforced tower-leg openings typically fail in one to two seasons. UV exposure, mildew, and stress at the tower legs are the most common failure points.
Protect Your Tower Boat the Right Way
A ski boat cover with tower protects your entire boat, not just the cockpit. The right cover fits your tower height, tower placement, and hull geometry without sagging or trapping moisture. Sewn-in ventilation prevents mildew. Reinforced tower-leg openings prevent tearing. Double-stitched seams handle wind and weather for years, not seasons.
Westland's Select Fit® and Exact Fit® covers are built by the same team trusted by today's top boat manufacturers. Nearly 40 years of patterning experience, hand-sewn construction, and a fit guarantee that backs up the brand. Shop Westland's tower boat covers at westlandcovers.com or call the marine canvas experts to confirm fit for your boat.
