Westerly Berwick 31 Buyer's Guide
The Westerly Berwick 31 on the used market is a 31-foot twin-keel coastal cruiser from Westerly Marine Construction Ltd, designed by Laurent Giles and Partners, with production starting in 1973. Its defining used-market trait is the bilge-keel hull that dries out upright in tidal harbors, shared with the Centaur 26's configuration philosophy but in a larger, three-cabin package than the fin-keel Longbow alternative.
Layouts on the Used Market
Every Berwick 31 carries the same core hull introduced in the early 1970s, with a raised coachroof, high freeboard, and wide 2.9 m beam giving standing headroom and a three-cabin plan for six. The forward V-berth, convertible saloon settees, and quarter berth behind the starboard nav station are consistent; the galley is always to port at the companionway foot. A large aft cockpit with tiller and wide side decks is standard. The original Volvo MD2B diesel sits in a roomy compartment reached from the cockpit hatch and saloon — a real plus when comparing against tighter engine bays in cross-shopped marques.
Equipment and Common Upgrades
Brokers' listings commonly show heating, AIS, autopilot, and chartplotter already fitted, reflecting the boat's use as a settled coastal cruiser. Inverters and life rafts are often seen as well. Less commonly, buyers will find a bimini or dodger as an owner upgrade. For a shopping shortlist, the meaningful clusters are power and energy — heating and inverter support livable shoulder-season use — and navigation and control, where AIS, chartplotter, and autopilot together reduce short-handed workload on tidal passages. Canvas such as a dodger remains a sporadic owner addition rather than a default.
What to Inspect
The twin cast-iron keels with internal lead ballast are bolted to the hull on stainless steel fastenings, so check the keel bolts and surrounding sealant for any sign of weeping where the boat has taken the ground bolted to the hull with stainless steel bolts. The skeg-hung rudder is foam-cored fiberglass on a stainless stock; inspect the rudder skin for hairline cracks that could let water saturate the core and corrode the stock. The deck is balsa-cored in areas for stiffness, so test around deck fittings and winches for softness that would signal water ingress. The solid below-waterline hull has no core, but the original MD2B is raw-water cooled on many survivors, and some owners have replaced it — confirm cooling type and running hours.
Availability and Buyer's Takeaway
Berwicks appear regularly in the United Kingdom, Ireland, Germany, Türkiye, and Jersey. For a buyer, the practical checklist is: confirm keel-bolt sealant integrity, probe the balsa deck for soft spots, examine the rudder for core saturation, verify engine cooling and access, and note tankage — 76 L fuel and 114 L water — as limiting for long passages. A bilge-keel Berwick rewards the tidal cruiser with drying capability and a stiff, roomy hull at modest ambitions.
Price & volume trends
Monthly asking-price and listing-volume trends for the Westerly Berwick 31. The line shows the median ask each month; the bars show how many listings appeared.
Monthly breakdown · 8 rows
| Month | Listings | Median ask | Δ vs. last mo. |
|---|---|---|---|
| Sep 25 | 3 | $27,948 | — |
| Oct 25 | 2 | $18,684 | -33.1% |
| Jan 26 | 1 | $12,909 | -30.9% |
| Apr 26 | 8 | $12,909 | 0.0% |
| May 26 | 3 | $6,987 | -45.9% |
| Jun 26 | 1 | $7,473 | +7.0% |
| Jul 26 | 2 | $14,573 | +95.0% |
| Aug 26 | 1 | $6,947 | -52.3% |
Where they're listed
Westerly Berwick 31 listings appear across 5 countries. United Kingdom has the most listings with 14 (70.0%), followed by Ireland and Germany.
Country view
20 listings · 5 countries| Country | Median ask | Listings · 12 mo | Active · 90 d | Share |
|---|---|---|---|---|
| United Kingdom | $12,909 | 14 | 3 | 70.0% |
| Ireland | $6,987 | 3 | 0 | 15.0% |
| Germany | $31,442 | 1 | 0 | 5.0% |
| Jersey | $20,382 | 1 | 0 | 5.0% |
| Turkey | $27,948 | 1 | 0 | 5.0% |
Comparable models
Similar length, displacement, and era. Open a row to compare that model's market page.
Similar boats to compare
2 similar designs| Model | LOA | Median ask | Listings · 12 mo | Active · 90 d |
|---|---|---|---|---|
| Westerly Berwick 31You are here | — | $ 12,909 | 21 | 4 |
| Rustler 31 | 31.42' | $ 17,664 | 14 | 0 |
