Hallberg-Rassy 370

Name: Hallberg-Rassy 370
Brand: Hallberg-Rassy

In production

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Hallberg-Rassy 370 exterior — Hallberg-Rassy

Design

Designer: Germán Frers Naval Architecture & Engineering
Naval architect: Germán Frers Naval Architecture & Engineering

Summary

Sailing MonohullSailCE A

Length overall: 39.8 ft
Beam: 12.3 ft
Draft: 5.5–6.6 ft
Air draft: 59.4 ft
Displacement: 17,637 lb
Sail area (upwind): 882 ft²
Cabins: 2
Steering wheels: 2

* A standard reference image, not the actual boat — shown to help visualise this model's published dimensions.

Best Suited For

Bluewater Cruising
From the published figures: CE Category A · LOA 12.13 m · fresh water 474 L
Short-Handed
From the published figures: LOA 12.13 m · upwind 81.9 m²

Tags are derived from certified class, length, sail area, accommodation and tankage using the criteria described on the Sources page; an editor may add or remove one.

Sailing Ratios

Classic yacht-design ratios worked out from the builder's published figures, each shown against the bands designers read it by.

Sail area / displacement

How much sail the boat carries for its weight — its power in light air.

20.8· Performance

How it is worked out

sail area (ft²) ÷ (displacement as ft³ of seawater)^⅔

published upwind sail area

Displacement / length

How heavy the boat is for its waterline length. Lower is lighter and quicker; higher is steadier and roomier.

188· Moderate

How it is worked out

displacement (long tons) ÷ (0.01 × waterline length in ft)³

Ballast ratio

The share of the weight carried in the keel — a rough guide to stiffness, though how deep that weight sits matters as much.

34· Moderate

How it is worked out

ballast ÷ displacement × 100

Comfort ratio

Ted Brewer's measure of how gently a boat moves in a seaway. Higher means a slower, easier motion.

26.4· Coastal

How it is worked out

displacement (lb) ÷ (0.65 × (0.7 × LWL + 0.3 × LOA) × beam^1.333), lengths in ft

Capsize screening

A guide from the inquiry after the 1979 Fastnet race: below 2 was taken as suited to ocean passages. It ignores hull shape and where the ballast sits.

1.89· Below 2

How it is worked out

beam (ft) ÷ (displacement as ft³ of seawater)^⅓

Hull speed

Roughly the speed a displacement hull reaches before it has to climb its own bow wave.

7.9 kn

How it is worked out

1.34 × √(waterline length in ft), in knots

Most builders publish a light displacement. The ratios were defined on a loaded boat, so every boat here reads a little lighter than a surveyor's figure would — all alike, which keeps them comparable.

Tanks

What the builder publishes about how fast, how strong and how much the boat carries.

Fuel and water on one scale: a tank twice the height holds twice as much.

Fuel66 gal
Water125 gal

Design Category

Certified CE design category A (Ocean): the wind and waves the EU Recreational Craft Directive says this boat is designed to take.

D
Sheltered waters
Wind
up to Beaufort 4
Waves
up to 0.3 m
C
Inshore
Wind
up to Beaufort 6
Waves
up to 2 m
B
Offshore
Wind
up to Beaufort 8
Waves
up to 4 m
AThis boat
Ocean
Wind
above Beaufort 8
Waves
above 4 m

Design limits set by the EU Recreational Craft Directive (2013/53/EU), in significant wave height. A category covers the conditions of those below it. It is the limit the boat was designed to, not a promise that it is safe in any conditions within it — that judgement stays with the skipper.

Show the builders' own words

A figure marked with a quote mark was read from the builder's page. Open it for the exact line, the page and the date.

Dimensions

LOA: 39.8 ft (12.13 m)
Hull length: 37.1 ft (11.32 m)
LWL: 34.7 ft (10.59 m)
Beam: 12.3 ft (3.75 m)
Draft (min): 5.5 ft (1.69 m)
Draft (max): 6.6 ft (2 m)
Air draft: 59.4 ft (18.1 m)
Displacement: 17,637 lb (8,000 kg)
Ballast: 6,019 lb (2,730 kg)
Cabins: 2
Heads: —
Berths: —

Sail Plan

Main sail: —
Jib: —
Genoa: —
Sail area: 882 ft² (81.9 m²)
Downwind sail area: —
Rig type: —

Engine and Tanks

Engine: 51 hp (Volvo Penta)
Engine count: 1
Engine manufacturer: Volvo Penta
Propulsion type: —
Fuel capacity: 66 gal (248 L)
Fresh water capacity: 125 gal (474 L)
Black water capacity: —

Construction

Mast material: —
Hull material: GRP
Deck material: —
Keel type: Lead bulb on iron blade
Rudder type: —
Steering wheels: 2

Builder's Own Figures

Estimated NRT: 12.82 T
Transport height, without windshield, pulpit, pushpit, steering wheels, pedestals: 3.99 m
Transport height, including windshield: 4.33 m
Max torque: 128 Nm @ 2000 rpm
Estimated GRT: 14.24 T
Sail area with genoajib, standard boat: 79.6 m2

Figures read fromthe builder's page

Layouts & Drawings

1 drawing from the builder's page: general arrangement, sail plan, profile.

Hallberg rassy370 sail plan 241105 — Hallberg-Rassy

Brochure

Download the official Hallberg-Rassy 370 brochure (PDF)

Videos

External content

Films of this model from the builder's official YouTube channel (Hallberg-Rassy). They are the builder's own; the figures above are the reference.

Hallberg-Rassy 370 – The Movie
Hallberg-Rassy · 12/16/2025
Hallberg-Rassy 370 – Sailing Teaser | Full Movie Coming Soon
Hallberg-Rassy · 10/21/2025
Hallberg-Rassy 370 launch
Hallberg-Rassy · 10/5/2025

Shorts

How would you build your Hallberg-Rassy 370?
Carbon wheels on the all-new Hallberg-Rassy 370
486 Watts of Solar Power | Hallberg-Rassy 370
Hallberg-Rassy 370 Interior Sneak Peek
Hallberg-Rassy 370 in Production

Videos whose title names the Hallberg-Rassy 370, from the channel the builder's site links; last checked 9/30/2026. Playing one loads YouTube's player, which may set cookies.

About Hallberg-Rassy

Premium production

Swedish builder of bluewater cruising sailboats, based in Ellös and formed in 1972, when the Rassy yard took over that of Harry Hallberg (founded in 1943), and still 100% family-owned.

Hallberg-Rassy began as two yards. Harry Hallberg opened his own wooden-boat yard at Kungsviken on the island of Orust in 1943, built the Folkboat and the Kungskryssaren in series, and in 1963 was among the first to build sailing boats in GRP in series -- his P-28, most of its first hundred sold to the USA, was the yard's early export success. Christoph Rassy arrived from Bavaria in 1960, bought the old Hallberg yard at Kungsviken when Hallberg moved to Ellös in the mid-1960s, and in 1966 launched the Rasmus 35, a pioneering long-distance cruiser with a centre cockpit behind a windshield -- the arrangement the yard has kept ever since. When Harry Hallberg retired in 1972 the Rassy yard bought the Ellös premises and the two names merged into Hallberg-Rassy; the first new design under that name, the Monsun 31, became the bestseller with 904 built by 1982. Germán Frers has drawn every model since 1988. The yard is still in Ellös and still family-owned.

Visit brand page

The Hallberg-Rassy Range

Every model Hallberg-Rassy publishes, by length — where this one sits in the range.

Include 45 discontinued

By the Same Designers

Boats this boat's designers also drew, for other builders too. Credits are grouped only where the names clearly agree, however each builder spelled them; an unclear one is left out.