BoatsSoutherly 115

Southerly 115

Masthead Sloop · Swing Keel · First built 1984

A versatile swing-keel cruiser evolving from Dick Carter's original design to the twin-rudder Humphreys MIII version

Designed by D. Carter, Rob Humphreys, Northshore Design Team & Dick Carter.

LOA
Beam
Draft (max)
Displacement
Ballast
Hull type
Swing Keel

See her sail

The Southerly 115, on the water

The fleet's own footage — the truest look at how she really moves.

Is it for you?

Character

Where this design lands on the numbers a shopper trusts — read straight from her own ratios.

Shoal draftDraws 0.69 m, board up where she has one — creeks, sandbars and thin anchorages most keels have to stay out of.
LivelySea-kindly

Her heavy displacement on a moderate beam gives 29 — a moderate, middle-of-the-road motion.

Comfort ratio 29
CoastalBluewater

1.93 — just under the 2.0 offshore line; her beam is modest for her weight.

Capsize screening 1.93
LightHeavy

327 — heavy for her waterline, built to carry stores and ride steadily.

Displacement / length 327
EasygoingPowered-up

10.1 — modest power for her weight; easygoing rather than lively, and happier with a breeze.

Sail area / displacement 10.1
TenderStiff

50% of her weight is ballast — stiff, standing up well to her sails.

Ballast 50%

A capable cruiser that sits just inside the offshore line — coastal work with real passages in her.

What the fleet has seen

The Southerly 115, as the fleet has seen it

Derived from the videos the fleet has analysed of this model. ▶ marks open the moment aboard.

The Southerly 115 is a Masthead Sloop with a swing keel, built by Northshore Yachts from 1984 to the present, with an LOA of 11.2 meters and a displacement of 6901 kg. Its lifting keel allows access to shallow anchorages while maintaining performance in choppy conditions, and its hull design prevents slamming.0:47 The MIII version, designed by Rob Humphreys, features a deeper swing keel and twin rudders. The interior includes a high cabin top with large windows, providing natural light and visibility from the forward-facing chart table, which incorporates autopilot control for steering below deck.1:10 The L-shaped galley has deep fiddles and a well-drained sink.1:46 The aft cabin offers ample storage and dual-access engine maintenance panels.1:58 The saloon table converts to a double berth and seats six, while the forward V-berth has two comfortable single bunks.2:51 A delivery crew aboard a Southerly 115 prepared for a mid-February passage from Chichester, United Kingdom, to St Helier, Jersey, inspecting the rig and systems, including recent yard work on the drop keel.0:08 They encountered 20 knots of apparent wind and lumpy seas after clearing St Catherine's Point, necessitating a reefed mainsail and headsail, and later navigated mist, drizzle, and wind-over-tide conditions near Jersey.5:42

The living fleet

Sailed by the fleet

Where the fleet has filmed this boat.

Seen 2 times across one channel of the fleet.

Basemap © Wikimedia Commons · CC BY-SA 4.0

On the water

The Southerly 115 on video

The record

Full specifications

The complete reference set — tap any figure to switch between metric and imperial.

Dimensions
Weights
Ballast / displacement
49.9%
Rig & sail area
Rig
Masthead Sloop
Ratios
SA / displacement
10.1
Displacement / length
326.6
Comfort ratio
28.6
Capsize screening
1.93
Hull speed
7.0 kn
Pounds / inch immersion
1171
Hull
Hull type
Swing Keel
Construction
Fiberglass
Production
Years built
First built 1984
Designer
D. Carter, Rob Humphreys, Northshore Design Team, Dick Carter
Builder
Northshore Yachts

Boats like this, on the water

More boats like her, on the water

Comparable boats the fleet has on camera: same type, within a quarter of her length. Open the boat, or watch the video — a timestamp means she only appears in passing.

Irwin Yachts 38-111.51 mSame hull family0.3 m longerA 1970 masthead sloop featuring a deep-draft keel-centerboard configuration and a spade rudder for shoal-water versatility
Southerly 329.97 mSame hull family1.3 m shorterA Stephen Jones-designed fractional sloop with a swing keel, built for versatile shoal-draft access since 2007
Southerly 11010.82 mSame hull family0.4 m shorterA Rob Humphreys-designed fractional sloop with a swing keel that allows for shallow-water exploration and drying out
Southerly 35RS10.82 mSame hull family0.4 m shorterA Rob Humphreys-designed swing keel cruiser built for shoal water access with a versatile fractional rig
Pearson Yachts 3510.67 mSame hull family0.6 m shorterBoasting the longest production run of any Pearson model, this keel/centerboard sloop remained largely unchanged for 14 years
Tartan Marine 34 C10.49 mSame hull family0.7 m shorterA Sparkman & Stephens masthead sloop featuring a keel-centerboard hull designed for shoal water and IOR competition

The family

Related models

The designs closest to hers — usually the rest of the builder's range, sometimes the same hull sold under another name.

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The fleet has more to say

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