Tombolo 28 exterior photo

Tombolo 28

A trailerable, no-fuss island cruiser for casual weekend adventures.

Project Details

The Tombolo 28 is a practical and unpretentious outboard cruiser designed to bridge the gap between shore and island. Built for a cruising couple with occasional guests, she is equally at home making a 15-25 mile run to a quiet weekend anchorage as she is hauled out on a trailer for off-season storage — or trucked to a distant port for a change of scenery.
Refreshingly no-frills, the Tombolo 28 is a boat built for living, where sandy feet and crab pots are welcome. Her modified-V, low-deadrise hull with a fine entry and long waterline is optimized for a single 150 hp outboard, delivering an economical cruising speed of just under 20 knots, with the ability to push 21-24 knots when desired.

Length: 28.5’ (8.7m)
Type: Trailerable Outboard Cruiser
Builder: Custom

Tombolo 28 stern view
Tombolo 28 exterior render
Toombolo 28 exterior render
Tombolo 28 profile render
Tombolo 28 CAD cut-away view
Tombolo 28 exterior render
Tombolo 28 interior plan view layout

"The Tombolo is handsome, with a unique, classically modern character that will always be distinctive."

WoodenBoat Magazine
May/June 2020 #274

For Builders

Construction plans for building the Tombolo 28 outboard cruiser are now available for home and professional builders! The design is intended for builders with moderate to advanced boatbuilding skills and uses readily available materials and hardware.

The specifications call for epoxy for lamination and bonding due to its superior mechanical properties for this application. The Tombolo uses a cedar strip wood composite for the hull and primarily plywood for the structural components, bulkheads, deck, house, and the remainder of the boat construction.

The plan package is very comprehensive, with plentiful details and specifications from dimensions to laminate callouts. It also includes digital files that allow the builder to have the molds, bulkheads, stringers, and other parts CNC-machined, thus saving time and improving accuracy.

For more information, study plans, and pricing, please contact me directly.



SPECIFCATIONS

LENGTH OVERALL 28'-6” (8.7M)
LENGTH WATERLINE 27'-7” (8.43M)
BEAM 9'-0” (2.74M)
DRAFT (1/2 LOAD) 1'-5” (.43M)
DISPLACEMENT (1/2 LOAD) 5,600 LBS (2,540 KG)
POWER 1 X 115-150 HP OUTBOARD
SPEED 16-18 KT (CRUISE) 21-24 KT (TOP)
FUEL CAPACITY 100 GAL (379 L)
FRESH WATER 25 GAL (95L)
BLACK WATER 25 GAL (95L)
MATERIAL  WOOD/FRP COMPOSITE
HEIGHT AWL (MAST UP/DWN) 7'-6” (2.3M)
DEADRISE 12°
HEADROOM (INTERIOR) 5'-10” (1.8M)
SKILL LEVEL INTERMEDIATE
BUILD TIME  2000 HOURS 

SIEWERT YACHT DESIGN

Located in Anacortes, WA.

© 2026 Siewert Design, LLC

  • Tombolo 28 exterior render
  • Toombolo 28 exterior render
  • Tombolo 28 profile render
  • Tombolo 28 CAD cut-away view
  • Tombolo 28 exterior render
  • Tombolo 28 interior plan view layout