2025 Boston Whaler 405 Conquest Boat in Quincy, MA 02169 US
Built in 2025
405 Conquest
4 Engines (4x MERCURY)
40 feet
Gas
Fiberglass/Reinforced
Cruising Boston Harbor just got an upgrade with the 2025 Boston Whaler 405 Conquest, finished in eye-catching Platinum and Black-Chrome Gray. Four powerful Mercury 400 JPO V10 AMS engines provide the muscle for quick trips out to the Boston Harbor Islands or leisurely passes along the Charles River. The Seakeeper SK6 gyroscopic stabilizer ensures smooth sailing, no matter the sea conditions, while the onboard diesel generator guarantees comfort and convenience on longer journeys.
Navigation is effortless and confidence-inspiring. The helm features triple Simrad NSO displays (16", 19", and 24"), a Vessel View Mobile Automatic ID system, Open Array Radar, and FLIR M332 Thermal Night Vision, making foggy mornings or busy marinas near Logan Airport a breeze. The cockpit rear view camera and satellite weather and radio keep you fully aware and connected as you pass by iconic landmarks like the Zakim Bridge or dock in the North End.
On deck, you'll find luxurious spaces designed for entertaining and relaxing. Enjoy a sheltered conversation thanks to full-height side glass with pop and slide openings, or break out the refreshments at the starboard helm deck wet bar while friends lounge on the foldout bench seat. Mesh windshield shades, a bow sunshade, and a teak aft cockpit table set the scene for summer gatherings, while LED and underwater lighting add drama and safety long after sunset.
Inside, comfort continues with a climate-controlled master stateroom, a modern VacuFlush head and shower, and amenities like a cockpit refrigerator and convenient cooktop. Whether outfitting for an overnight in Marblehead, a spirited afternoon chase past Castle Island, or an impromptu party with the premium audio system cranking your favorite playlist, this 405 Conquest turns everyday trips around Boston into unforgettable cruising adventures.
Price History
| Date | Event | Price |
|---|---|---|
| 7/10/26 | Price decreased | $1,399,708(-7.8%) |
| 7/1/26 | Initial price | $1,517,756 |
Videos from MarineMax Boston on this 2025 Boston Whaler 405 Conquest
2025 Boston Whaler 405 Conquest Video Tours
Boston Whaler 405 Conquest: BoatTEST Review
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.
Overview from around the web 2025 Boston Whaler 405 Conquest
The Boston Whaler 405 Conquest has garnered positive feedback from customers who appreciate its blend of performance, comfort, and versatility
Many users highlight the boat's spacious layout and well-designed cabin, making it ideal for both day trips and extended overnight stays. The cockpit's layout is often praised for its easy accessibility and functionality, perfect for entertaining or fishing. Customers also commend the boat’s impressive handling and stability in various sea conditions, enhancing confidence whether cruising or navigating rough waters. The powerful engine options provide ample speed and responsiveness, satisfying those looking for a thrilling experience. The luxurious amenities, including a well-appointed galley and comfortable sleeping quarters, are frequently mentioned as standout features, catering to family outings and social gatherings. Additionally, owners appreciate the quality craftsmanship that Boston Whaler is known for, reinforcing the brand's reputation for durability and longevity. In summary, the 405 Conquest is celebrated for its exceptional performance, spacious design, and high-quality construction, making it a favored choice among boating enthusiasts who seek adventure and luxury on the water.
The Biggest Pros and Cons
2025 Boston Whaler 405 Conquest: Pros and Cons
Pros
Versatile Design: The 405 Conquest is engineered for both serious offshore fishing and family cruising. Its adaptable layout allows for seamless transitions from tackling rough waters to enjoying leisurely days on the water.
Comfortable Accommodation: With spacious sleeping quarters, a well-appointed galley, and a stylish head, this vessel ensures comfort for both day trips and extended stays. It features a generous cabin with ample seating and storage options.
Exceptional Stability: The hull design provides excellent stability in various sea conditions, making it a reliable choice for offshore adventures. Its unsinkable construction is a hallmark of the Boston Whaler brand, ensuring safety and peace of mind.
Advanced Technology: The boat is equipped with the latest navigation and entertainment systems, offering state-of-the-art amenities. The user-friendly controls and premium sound system enhance the overall boating experience.
Ample Storage: The 405 Conquest boasts ample storage compartments and built-in fishing features, appealing to anglers and recreational boaters alike. This includes rod holders, tackle storage, and a livewell for fishing needs.
Powerful Performance: With robust twin or triple engine options, this vessel delivers impressive speed and maneuverability. Experienced captains will appreciate the boat's handling capabilities in challenging conditions.
Cons
Price Point: As a premium boat, the 405 Conquest comes with a higher price tag, which might be a deterrent for some buyers. The investment is significant, but it reflects the quality and features offered.
Fuel Efficiency: With powerful engines, fuel consumption can be higher, especially during long-distance travels. Buyers should consider their typical usage patterns when evaluating this aspect.
Size and Weight: While providing stability and comfort, the larger size and weight of the 405 Conquest can make it more challenging to maneuver in tight spaces or shallow waters compared to smaller vessels.
Maintenance Costs: Owning a high-performance boat like the 405 Conquest may come with increased maintenance and repair costs, especially if utilizing advanced features and technologies regularly.
Limited Trailerability: Due to its size, the 405 Conquest may not be easily trailerable for many owners, limiting its transport options and potentially increasing the need for a slip at a marina.
Customization Complexity: While the boat offers various customization options, navigating the choices and ensuring the right fit for personal preferences can be overwhelming for some buyers.
Made For
The 2025 Boston Whaler 405 Conquest is designed for avid boaters who appreciate both performance and luxury on the water. This versatile vessel is perfect for serious anglers seeking the freedom to explore vast fishing grounds, while also catering to families or groups looking for comfort and convenience during weekend getaways or day trips. With its spacious cockpit, advanced fishing features, and a well-appointed cabin, the 405 Conquest accommodates everyone from seasoned fishers to leisurely cruisers. Its robust construction and exceptional stability make it a reliable choice for adventurous souls ready to take on the open sea or navigate coastal waters with ease. Whether you're chasing the next big catch or simply enjoying a day of relaxation on the water, the Boston Whaler 405 Conquest is tailored for those who demand excellence in every aspect of their boating experience.
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 2025 Boston Whaler 405 Conquest | |||||
|---|---|---|---|---|---|
| $1,399,708 | $879,900 | $840,000 | $449,000 | $219,900 | $179,900 |
| Quincy | Hingham | Quincy | Marshfield | Quincy | Quincy |
| 40' | 40' | 40' | 34' | 31' | 25' |
| MERCURY | Mercury | Mercury | Mercury | MERCURY | MERCURY |
| 400 hp | 400 hp | 300 hp | 300 hp | 300 hp | 200 hp |
| 16 | 484 | 1 | 110 | 7 | 340 |
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