Hallberg-Rassy Monsun 31 Buyer's Guide
Shopping the brokerage market for a Monsun 31 means considering a 1973–1982 Enderlein design of which over 900 exist, a fact that keeps used examples in steady circulation across several national fleets. She is a 30-foot 9-inch full-keel cruiser whose compact size belies a genuine ocean-going record.
Layouts on the Used Market
The Monsun 31 presents a single classic aft-cockpit configuration with the protected windscreen and bikini top. Below, buyers will find the L-shaped port dinette converting to a twin, a starboard settee berth, a navigator’s bunk behind the chart table, and a forward cabin divided by the head. The interior is almost all solid mahogany, and the teak-covered cockpit with snug secure feel is consistent across boats. Some owners have reworked cushions from single long pads to separate sections and added lee cloths, but the fundamental plan does not vary by year.
Equipment and Common Upgrades
On the used market, autopilots, heating, chartplotters, teak decks, and solar are commonly fitted, while inverters and spinnakers are often seen. Less common but possible are electric winches and furling mains as owner upgrades. For a buyer, the consequential clusters are power and energy — solar and inverter support refrigeration and electronics offshore — and sail handling, where a spinnaker or autopilot reduces crew load on long passages. Navigation is usually modernized with a chartplotter. Comfort items like heating and teak decks speak to the boat’s protected-cockpit cruising character.
What to Inspect
Documented owner refits show original through-hulls using gate valves as seacocks instead of ball valves, which should be replaced. Water entry at the U-bolt-style lower shroud plates has been recorded and warrants close inspection of the deck joint and chainplate area. Sanitation gear on older boats can emit a noticeable stench from the head and holding tank. Otherwise, hull gelcoat and nonslip deck have proven durable even on 45-year-old boats.
Availability and Buyer's Takeaway
These yachts typically appear in the United Kingdom, Germany, Netherlands, United States, Denmark, and Greece. For a buyer, the checklist is brief: confirm seacocks are ball-type, check lower shroud plates for moisture, smell the head, and verify the engine — original Volvo or a later Yanmar — has logged hours. A Monsun 31 in sound condition is a small boat that has proven it can take you anywhere.
Price & volume trends
Monthly asking-price and listing-volume trends for the Hallberg-Rassy Monsun 31. The line shows the median ask each month; the bars show how many listings appeared.
Monthly breakdown · 10 rows
| Month | Listings | Median ask | Δ vs. last mo. |
|---|---|---|---|
| Sep 25 | 5 | $27,187 | — |
| Oct 25 | 1 | $61,186 | +125.1% |
| Nov 25 | 2 | $20,976 | -65.7% |
| Jan 26 | 2 | $31,562 | +50.5% |
| Feb 26 | 2 | $47,646 | +51.0% |
| Mar 26 | 2 | $26,162 | -45.1% |
| Apr 26 | 12 | $23,210 | -11.3% |
| May 26 | 3 | $88,380 | +280.8% |
| Jun 26 | 4 | $41,435 | -53.1% |
| Jul 26 | 3 | $41,500 | +0.2% |
Where they're listed
Hallberg-Rassy Monsun 31 listings appear across 12 countries. United Kingdom has the most listings with 10 (28.6%), followed by Germany and Netherlands.
Country view
35 listings · 12 countries| Country | Median ask | Listings · 12 mo | Active · 90 d | Share |
|---|---|---|---|---|
| United Kingdom | $27,187 | 10 | 0 | 28.6% |
| Germany | $26,162 | 8 | 1 | 22.9% |
| Netherlands | $22,141 | 4 | 0 | 11.4% |
| Denmark | $23,230 | 3 | 0 | 8.6% |
| United States | $41,500 | 3 | 3 | 8.6% |
| Belgium | $36,708 | 1 | 0 | 2.9% |
| Switzerland | $44,698 | 1 | 1 | 2.9% |
| Spain | $33,212 | 1 | 0 | 2.9% |
| Greece | $22,141 | 1 | 1 | 2.9% |
| Poland | $45,448 | 1 | 0 | 2.9% |
| Portugal | $62,080 | 1 | 0 | 2.9% |
| Sweden | $33,795 | 1 | 0 | 2.9% |
Comparable models
Similar length, displacement, and era. Open a row to compare that model's market page.
Similar boats to compare
3 similar designs| Model | LOA | Median ask | Listings · 12 mo | Active · 90 d |
|---|---|---|---|---|
| Hallberg-Rassy 31 | 31.56' | $ 92,640 | 43 | 13 |
| HR Monsun 31You are here | — | $ 32,919 | 36 | 7 |
| Rustler 31 | 31.42' | $ 17,672 | 14 | 0 |