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insideSail…

Westerly Seahawk 34 · insideSail

Westerly · Production dates awaiting documentation

Westerly Seahawk 34

An aft double cabin and wheel steering. Fin and twin-keel versions differ in draft and ballast weight, so the variant matters when comparing boats.

CruiserEditorial classification

Overall length · LOA

10.26 m

Beam

3.74 m

Displacement

5,760 kg

Ballast

2,600 kg

Draught

1.5 m

Enclosed cabins

Engine power

—

Cockpit

—

Published values checked against their source; each individual boat's condition and configuration may differ.

What kind of boat is this?

An aft double cabin and wheel steering. Fin and twin-keel versions differ in draft and ballast weight, so the variant matters when comparing boats.

Editorial interpretation. Categories overlap and are not certifications.

Understand sailboat types

Dimensions

Overall length · LOA Overall length · LOA	10.26 m	View source Westerly Seahawk 34 — historical technical documentation Published specifications and accommodation description Evidence confidence: Medium Checked against the source: 2026-10-09 Published reference from the cited document; verify individual boats separately. Documentary verification; this is not a measurement of an individual boat.
Waterline length · LWL Waterline length · LWL	8.23 m	View source Westerly Seahawk 34 — historical technical documentation Published specifications and accommodation description Evidence confidence: Medium Checked against the source: 2026-10-09 Published reference from the cited document; verify individual boats separately. Documentary verification; this is not a measurement of an individual boat.

Beam Beam	3.74 m	View source Westerly Seahawk 34 — historical technical documentation Published specifications and accommodation description Evidence confidence: Medium Checked against the source: 2026-10-09 Published reference from the cited document; verify individual boats separately. Documentary verification; this is not a measurement of an individual boat.

Draught Draught	1.5 m	View source Westerly Seahawk 34 — historical technical documentation Published specifications and accommodation description Evidence confidence: Medium Checked against the source: 2026-10-09 Published reference from the cited document; verify individual boats separately. Documentary verification; this is not a measurement of an individual boat.

Displacement Displacement	5,760 kg	View source Westerly Seahawk 34 — historical technical documentation Published specifications and accommodation description Evidence confidence: Medium Checked against the source: 2026-10-09 Published reference from the cited document; verify individual boats separately. Documentary verification; this is not a measurement of an individual boat.

Ballast Ballast	2,600 kg	View source Westerly Seahawk 34 — historical technical documentation Published specifications and accommodation description Evidence confidence: Medium Checked against the source: 2026-10-09 Published reference from the cited document; verify individual boats separately. Documentary verification; this is not a measurement of an individual boat.

Hull material	—	Data awaiting verification

Sailing characteristics

Keel Keel	Fin keel	View source Westerly Seahawk 34 — historical technical documentation Published specifications and accommodation description Evidence confidence: Medium Checked against the source: 2026-10-09 Published reference from the cited document; verify individual boats separately. Documentary verification; this is not a measurement of an individual boat.
Rudder support Rudder support	—	Data awaiting verification
Rig Rig	—	Data awaiting verification
Steering Steering	Wheel	View source Westerly Seahawk 34 — historical technical documentation January 1985 standard specification, page 1 Evidence confidence: Medium Checked against the source: 2026-10-09 Published reference from the cited document; verify individual boats separately. Documentary verification; this is not a measurement of an individual boat.
Sail area Sail area	—	Data awaiting verification

Sail plan, sail condition and actual loading affect behaviour. A single number cannot predict performance.

Comfort and behaviour at sea

The indicators below help compare proportions. Interpret them alongside hull shape, mass distribution, loading, condition and sailing conditions.

Ballast / displacement Ballast / displacement	45.14 %	Calculation & limits 100 × ballast_kg / displacement_kg conventional-monohull-v1 A conventional indicator calculated from this configuration's published data. It is neither a safety certification nor a prediction of an individual boat's condition. Input sources are shown with the corresponding specifications.
SA/D SA/D	—	Insufficient compatible data
D/L D/L	287.97	Calculation & limits (displacement_lb / 2240) / (0.01 × LWL_ft)³ conventional-monohull-v1 A conventional indicator calculated from this configuration's published data. It is neither a safety certification nor a prediction of an individual boat's condition. Input sources are shown with the corresponding specifications.
Comfort Ratio Comfort Ratio	23.82	Calculation & limits displacement_lb / [0.65 × (0.7 × LWL_ft + 0.3 × LOA_ft) × beam_ft^1.333] conventional-monohull-v1 Compare boats of similar size and type. Underwater hull shape, mass distribution and actual wave response are not represented. Input sources are shown with the corresponding specifications.
Capsize Screening Formula Capsize Screening Formula	2.1	Calculation & limits beam_ft / (displacement_lb / 64)^(1/3) conventional-monohull-v1 A conventional indicator calculated from this configuration's published data. It is neither a safety certification nor a prediction of an individual boat's condition. Input sources are shown with the corresponding specifications.
Theoretical hull speed Theoretical hull speed	6.96 kn	Calculation & limits 1.34 × √LWL_ft conventional-monohull-v1 Conventional approximation for displacement hulls, not a rigid limit or a guaranteed cruising speed. Input sources are shown with the corresponding specifications.
Power per tonne Power per tonne	—	Insufficient compatible data

These calculations are not safety certificates. STIX and AVS require specific documentation; they are not estimated from these ratios.

Propulsion

Engine power Engine power	—	Data awaiting verification
Transmission Transmission	—	Data awaiting verification
Fuel Fuel	—	Data awaiting verification
Water	—	Data awaiting verification

The original engine may have been replaced. Power, propeller, transmission and conditions together determine real use; consumption and range are not inferred from power alone.

Interior & layout

Cockpit Cockpit	—	Data awaiting verification
Enclosed cabins Enclosed cabins	2	View source Westerly Seahawk 34 — historical technical documentation Published specifications and accommodation description Evidence confidence: Medium Checked against the source: 2026-10-09 Source-linked reference for this exact scope. Enclosed-cabin count excludes the saloon. Documentary verification; this is not a measurement of an individual boat.
Heads Heads	1	View source Westerly Seahawk 34 — historical technical documentation Published specifications and accommodation description Evidence confidence: Medium Checked against the source: 2026-10-09 Published reference from the cited document; verify individual boats separately. Documentary verification; this is not a measurement of an individual boat.
Aft cabin Aft cabin	Yes	View source Westerly Seahawk 34 — historical technical documentation Published specifications and accommodation description Evidence confidence: Medium Checked against the source: 2026-10-09 Published reference from the cited document; verify individual boats separately. Documentary verification; this is not a measurement of an individual boat.
Internal walkthrough Internal walkthrough	—	Data awaiting verification
Aft double berth Aft double berth	Yes	View source Westerly Seahawk 34 — historical technical documentation Published specifications and accommodation description Evidence confidence: Medium Checked against the source: 2026-10-09 Published reference from the cited document; verify individual boats separately. Documentary verification; this is not a measurement of an individual boat.
Galley shape	—	Data awaiting verification
Galley level	—	Data awaiting verification
Headroom Headroom	—	Data awaiting verification

Enclosed cabins and saloon berths are different information. An internal aft walkthrough needs confirmation in the individual boat’s layout.

Westerly Seahawk 34

What kind of boat is this?

Dimensions

Sailing characteristics

Comfort and behaviour at sea

Propulsion

Interior & layout

Known issues

Market

Owners in the community

Experiences & questions

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