Southerly 135 Mk II Buyer's Guide
Shopping the brokerage market for a Southerly 135 Mk II means chasing a scarce 44-foot Rob Humphreys swing-keeler: Northshore Yachts built just eight from 1988 onward, so every example on the used market is a considered purchase rather than a commodity buy. The variable-draft bluewater cruiser with raised-deck saloon rewards patient hunting, but the buyer's lens must stay on structure and systems rather than cosmetics.
Layouts on the Used Market
Owner three-cabin arrangements are the more common layout seen among used boats, though both configurations turn up, and ex-charter examples are a common sight. The raised-deck saloon and high center cockpit are constant across the design, with the foldable dodger and narrow teak-capped side decks part of the original deck plan.
Equipment and Common Upgrades
Used boats commonly carry a strong equipment baseline: heating, bow thruster, electric winches, freezer, bimini, dodger, radar, AIS, autopilot, chartplotter, and life raft are commonly fitted. Often-seen upgrades that matter for passage-making include a watermaker, solar, lithium batteries, inverter, and wind generator for independent power, plus a gennaker or asymmetric spinnaker and a short-handed sail-handling setup for easier crew management. A swim platform and cockpit shower appear on many as comfort additions.
What to Inspect
The keel architecture is the heart of any survey. The unique keel box is molded into the hull, and the 6,260-pound cast-iron grounding plate is held by twenty-eight 12-millimeter bolts — check perimeter bolt integrity and any signs of hull/deck joint stress at the ballast package fastening. The 3,610-pound swing keel hinges on a 2-inch stainless pin in bronze bushings; confirm bushing wear and pin corrosion. The electric/hydraulic lift system should be cycled, with the manual backup verified. Hull is hand-laid FRP with balsa core above the waterline and a five-year blister warranty. Inspect gelcoat and core boundaries. Deck plywood infills at compression points should be sound under winch and hardware loads.
Availability and Buyer's Takeaway
The typical market for these boats is the United Kingdom. For a buyer, the checklist is tight: verify keel-box and grounding-plate bolting, exercise the swing-keel hydraulics and manual backup, survey the balsa-cored topsides for blistering, confirm the turbo Yanmar service history if fitted, and assess the electric winches and short-handed rigging for wear. A Southerly 135 Mk II well surveyed is a genuinely capable variable-draft offshore cruiser.
Price & volume trends
Monthly asking-price and listing-volume trends for the Southerly 135 Mk II. The line shows the median ask each month; the bars show how many listings appeared.
Monthly breakdown · 5 rows
| Month | Listings | Median ask | Δ vs. last mo. |
|---|---|---|---|
| Jun 25 | 1 | $271,492 | — |
| Sep 25 | 1 | $291,927 | +7.5% |
| Apr 26 | 1 | $270,202 | -7.4% |
| May 26 | 1 | $291,927 | +8.0% |
| Jun 26 | 1 | $291,927 | 0.0% |
Where they're listed
Southerly 135 Mk II listings appear across 1 country. United Kingdom has the most listings with 4.
Country view
4 listings · 1 country| Country | Median ask | Listings · 12 mo | Active · 90 d | Share |
|---|---|---|---|---|
| United Kingdom | $291,927 | 4 | 1 | 100.0% |
Comparable models
Similar length, displacement, and era. Open a row to compare that model's market page.
Similar boats to compare
9 similar designs| Model | LOA | Median ask | Listings · 12 mo | Active · 90 d |
|---|---|---|---|---|
| Southerly 115 | 36.83' | $ 62,863 | 46 | 12 |
| Catalina 400 Mk II | 41.5' | $ 140,000 | 43 | 3 |
| Southerly 420 | 42.19' | $ 533,169 | 17 | 2 |
| Southerly 49 | 49.57' | $ 407,432 | 12 | 3 |
| Southerly 35 RS | 35.5' | $ 135,712 | 11 | 5 |
| Southerly 105 | 35.43' | $ 46,274 | 8 | 1 |
| Hinckley Sou'wester 42/43 | 42.75' | $ 250,000 | 6 | 2 |
| Southerly 135 Mk IIYou are here | — | $ 291,927 | 4 | 1 |
| Southerly 480 | 49.15' | $ 818,621 | 2 | 0 |