2026 Boston Whaler 405 Conquest Boat in Naples, FL 34102 US

Price on request

New
builtBuilt in 2026
Year the boat was built
model

405 Conquest

Boat model
engine

4 Engines (4x MERCURY)

Engine type and count
length

40 feet

Overall boat length
fuel

Gas

Fuel type
material

Fiberglass/Reinforced

Hull material
Nominal Length
40ft
Length Overall
40ft
Beam
13.5ft
Drive Up Draft
2.5ft
Deadrise At Transom
19deg
Dry Weight
22400lb
Heads
1
Fresh Water Tanks
90gal
Fuel Tanks
620gal
Holding Tanks
30gal
Windlass
hydraulic-windlass
Hull Material
fiberglass
Hull Shape
other
Engine 1
Engine Make
MERCURY
Engine Model
WHT 400 JPO V10
Total Power
400hp
Engine Type
outboard
Fuel Type
gasoline
Drive Type
other
Engine 2
Engine Make
MERCURY
Engine Model
WHT 400 JPO V10
Total Power
400hp
Engine Type
outboard
Fuel Type
gasoline
Engine 3
Engine Make
MERCURY
Engine Model
WHT 400 JPO V10
Total Power
400hp
Engine Type
outboard
Fuel Type
gasoline
Engine 4
Engine Make
MERCURY
Engine Model
WHT 400 JPO V10
Total Power
400hp
Engine Type
outboard
Fuel Type
gasoline

Videos from MarineMax Naples on this 2026 Boston Whaler 405 Conquest

Contact MarineMax Naples

1146 6th Ave S, Naples, FL, 34102

Boston Whaler 405 Conquest: BoatTEST Review

Reviewed by Jeff Hammond

Overview

The Boston Whaler 405 Conquest represents the largest model in the Conquest lineup, designed with versatility in mind to accommodate families who enjoy both fishing and cruising. This model offers customizable features that cater to a dual-purpose lifestyle, blending comfort and functionality seamlessly.

Cockpit and Exterior Features

The cockpit of the 405 Conquest measures 11 feet 3 inches wide by 6 feet 6 inches fore and aft, offering a spacious and adaptable area. The standard layout includes a flip bench seat at the stern, while an optional summer kitchen replaces this with an electric grill, stainless steel rail, drawer-style refrigerator, sink, and multiple beverage holders. Storage is thoughtfully integrated, including dedicated spaces for a five-gallon bucket and cockpit tables, which Boston Whaler terms 'point-of-use storage.' For anglers, an optional aquarium live well can substitute the summer kitchen, with kitchen features relocated forward under the lounge. Additional fishing amenities include a 19-gallon live well in the aft port corner, rod holders, hawse pipes, racks for downrigger balls, and a first-in-class port side hull dive door with a heavy-duty stainless steel latch for hauling large fish or launching divers. The cockpit also features low-pressure glycol-filled cooling tubes for the 290-quart fish boxes, enhancing ice retention. Comfort and convenience are addressed with an optional 7-foot long sure shade, multiple rod holders on the hardtop, aft-facing lounge seats with beverage holders, a cooler with dual access, a pull-out shower, and wide passageways with secure rails leading to the foredeck. The foredeck itself boasts a 70-inch long by 58-inch wide sun pad with adjustable headrests, cup holders, grab rails, stereo speakers, and USB plugs.

Helm and Cockpit Galley

Access from the cockpit to the helm deck is facilitated by 9-inch tall steps with a 28-inch wide space between seats. The helm features a single-person seat that slides on a power base, with armrests and bolsters that fold up and a swivel function allowing the captain to engage socially when docked. The cockpit galley includes a Corian countertop, a single Kenyan burner, a sink with a fold-up faucet and removable cover, along with ample storage through drawers, cabinets, and a drawer-style refrigerator. The helm windshield is equipped with Boston Whaler's patented power vents and offers an optional full glass configuration. Additional features include overhead spreader lights, outrigger handles, speakers, courtesy lights, and a soft zipper pocket for storing the cockpit enclosure. An optional power skylight replaces standard hatches to enhance natural light.

Interior Living Spaces

The cabin provides six feet two inches of headroom and begins with a private bow stateroom, a highly requested feature in this size class. The sliding cabin hatch is uniquely designed with an articulating lower section to accommodate the hull's V-shape, a patented innovation by Boston Whaler. The bow berth, centered on the boat's axis, measures 80 inches long by 58 inches wide, with steps on either side. It includes adjustable head positioning for reclining to watch a 24-inch TV and stereo system located aft to port. Storage is abundant, with a cedar-lined hanging locker to starboard, a cedar-finished closet with shelves to port, and a large berth base that opens on gas struts for storing sizable items such as a life raft or luggage. A Dyson vacuum cleaner is standard and stored in the bow locker.

Heads and Additional Cabin Features

The private head compartment is accessible both from the master stateroom and the salon, featuring a separate shower area with a rainfall showerhead and a pull-up wand. The showerhead is designed to be recessed into the overhead in future models. The head also includes a vessel sink with Corian countertops, a skylight, and an opening port for ventilation. The salon area benefits from overhead skylights and hull-side windows that provide ample natural light. The dinette table folds to allow easy access and lowers to create additional sleeping space suitable for one adult or two children. Entertainment is supported by a stereo and a 32-inch TV, while controls for cooling, fish boxes, water maker, Sea Keeper, TV antenna gain, and air conditioning are discreetly housed behind overhead cabinet doors.

Galley and Aft Cabin

Located to port of the cabin steps, the galley is equipped with a single burner stove and a sink set in a Corian countertop, complemented by overhead storage and glass and beverage holders. Below the sink, an Isotherm refrigerator and a wastebasket are integrated. Above the galley, a cedar-lined locker offers additional storage with various shelves and compartments. The aft cabin features an 82 by 55 inch mattress that raises on a power assembly to reveal substantial storage beneath. Optional overhead racks can accommodate up to six fishing rods, enhancing the boat's utility for anglers.

Conclusion

The Boston Whaler 405 Conquest combines versatile cockpit and helm deck arrangements with comfortable and well-appointed interior accommodations, making it well-suited for family adventures on the water. Its thoughtful design caters equally to fishing enthusiasts and cruising families, while performance capabilities with Quad 400 Mercury outboards are detailed in a separate review. Overall, the 405 Conquest exemplifies Boston Whaler's commitment to quality, innovation, and multifunctional use.

Rating: 4.3 out of 5

Overview from around the web 2026 Boston Whaler 405 Conquest

The 2026 Boston Whaler 405 Conquest is receiving high praise from customers for its impressive blend of performance, comfort, and versatility on the water

Many users highlight its spacious and well-designed cabin, which offers ample seating and sleeping arrangements, making it perfect for both day trips and extended voyages. Boaters appreciate the high-quality materials and craftsmanship that Boston Whaler is known for, contributing to a luxurious on-water experience. Performance-wise, the 405 Conquest is lauded for its powerful engines and smooth handling, providing confidence whether cruising along coastal waters or tackling rougher seas. The hull design ensures a stable ride, which is especially important for families and those looking to fish. Safety features are also a recurring theme in customer feedback, with many noting the boat's sturdy construction and reliable capabilities. The integrated technology and user-friendly navigation systems enhance the overall boating experience, making it easier for both seasoned mariners and newcomers alike to operate the vessel. Overall, the 2026 Boston Whaler 405 Conquest stands out for its commitment to quality, safety, and performance, earning it a solid reputation among boating enthusiasts.

The Biggest Pros and Cons

2026 Boston Whaler 405 Conquest: Pros and Cons

Pros

Exceptional Build Quality: The Boston Whaler brand is renowned for its robust construction and unsinkable hull design, ensuring safety and durability even in challenging conditions.

Stylish Design: The 405 Conquest features sleek lines and modern aesthetics, making it visually appealing while incorporating functionality.

Ample Space: With a spacious cockpit and well-appointed cabin, this model offers generous room for passengers and gear, making it perfect for both day trips and extended outings.

Versatile Layout: The layout includes comfortable seating, a well-equipped galley, and multiple sleeping areas, accommodating both relaxation and entertainment needs.

Powerful Performance: Equipped with twin or triple engine options, the 405 Conquest delivers impressive speed and maneuverability, ideal for adventurers seeking thrilling offshore experiences.

Advanced Technology: The boat is outfitted with cutting-edge navigation and electronics systems, enhancing safety and ease of use.

Fishing Features: This model is designed with anglers in mind, featuring live wells, rod storage, and plenty of deck space for fishing activities.

Comfort and Amenities: Climate control systems and luxury finishes make for a comfortable onboard experience, whether you're cruising or fishing.

Cons

Price Point: As a premium vessel, the 405 Conquest comes with a significant investment, which may be a consideration for budget-conscious buyers.

Maintenance Costs: While built to last, maintaining high-performance engines and advanced technologies can incur ongoing costs.

Fuel Efficiency: Given its size and power, fuel consumption may be higher than smaller boats, requiring attention when planning long trips.

Storage Limitations: Although spacious, some users may find storage to be limited in certain areas, depending on how much gear and equipment they plan on carrying.

Complex Features: While advanced technology is a plus, it may require a learning curve for some users to fully utilize all the features.

Draft Depth: The 405 Conquest may not be suitable for shallow waters or locations with less-than-ideal docking conditions, potentially limiting access in certain environments.

Made For

The 2026 Boston Whaler 405 Conquest is designed for the avid boater who values both comfort and performance. This exceptional vessel is ideal for families looking to enjoy leisurely days on the water, anglers seeking the perfect platform for fishing adventures, and those who appreciate the finer points of a luxurious cruising experience. Equipped with cutting-edge technology and superior craftsmanship, the 405 Conquest offers an inviting cabin with ample seating, a well-appointed galley, and spacious sleeping accommodations for overnight excursions. Its robust hull delivers impressive stability and maneuverability, making it suitable for various water conditions. Whether you're fishing in remote waters, cruising with family and friends, or entertaining guests, the 2026 Boston Whaler 405 Conquest caters to a diverse range of boating enthusiasts, ensuring memorable experiences on the water.

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The Image of Boston Whaler 405 Conquest 2026 - 02026 Boston Whaler 405 Conquest
PricePrice on requestPrice on requestPrice on requestPrice on requestPrice on requestPrice on request
LocationNaplesNaplesStuartMiamiMiamiNaples
Nominal Length40'40'40'40'40'36'
Engine MakeMERCURYMERCURYMERCURY--MERCURY
Total Engine Power400 hp400 hp425 hp--400 hp
Days on Market541251162827423
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1146 6th Ave S
Naples, FL 34102

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