By MAURIPRO Sailing Specialists · Updated July 2026
What Is the Lewmar Ultra Low Profile Hatch?
The Ultra Low Profile hatch builds on Lewmar’s proven Low Profile design, with flush, clean lines that minimise impact on the deck. The lid is grey acrylic—durable and lightweight—while the anodised aluminium lower frame provides excellent corrosion resistance even in harsh marine environments. At just 10 mm above deck, it keeps the deck uncluttered and reduces the chance of stubbed toes and snagged sheets.
Key Features & Benefits
- Sleek, modern aesthetic: flush 10 mm profile for a clean deck.
- Durable and lightweight: grey acrylic lid with anodised aluminium frame.
- Corrosion-resistant frame: built for harsh saltwater environments.
- Versatile hinge: a new hinge system holds the lid open at any position up to 90°.
- 360° vent position: for optimal airflow below deck.
Retrofit Compatibility
The Ultra Low Profile hatch is designed as a seamless retrofit: the cut-outs match Low Profile, Medium Profile and Ocean Hatch installations without modification, and it is compatible with existing Lewmar trims and flyscreens. That makes it a cost-effective upgrade—in most cases you can replace an aging hatch without re-cutting the deck.
How to Choose the Right Hatch Size
Lewmar sizes its hatches by a size number (for example Size 50, 54, 60, 70) that corresponds to a specific deck cut-out. To choose correctly, measure your existing cut-out (or check your current hatch size number) and match it. Also decide between the flush bi-square lid for a seamless look, or external opening handles (available on selected sizes) for added convenience.
Where to Buy Lewmar Ultra Low Profile Hatches
MAURIPRO carries the Lewmar Ultra Low Profile hatch range across sizes, plus compatible trims and flyscreens. If you are refreshing deck hardware more broadly, see our guide to sailboat parts and rigging.
Frequently Asked Questions
How high does the Lewmar Ultra Low Profile hatch sit above the deck?
The Ultra Low Profile hatch sits just 10 mm above the deck, giving a flush, unobtrusive profile that keeps the deck clean and reduces snag points for sheets and toes.
Can I retrofit the Ultra Low Profile hatch into my existing hatch cut-out?
Yes. Its cut-outs match Lewmar Low Profile, Medium Profile and Ocean Hatch installations without modification, and it is compatible with existing Lewmar trims and flyscreens—so in most cases you can replace an older hatch without re-cutting the deck.
What is the Lewmar Ultra Low Profile hatch lid made of?
The lid is grey acrylic, which is durable and lightweight, and the lower frame is anodised aluminium for excellent corrosion resistance in harsh marine environments.
How do I choose the right Lewmar hatch size?
Lewmar hatches are identified by a size number (such as 50, 54, 60 or 70) tied to a specific deck cut-out. Measure your existing cut-out or check your current hatch's size number and match it, then choose between a flush bi-square lid or external handles on selected sizes.
Does the Ultra Low Profile hatch have ventilation options?
Yes. A new hinge system holds the lid open at any position up to 90°, and a 360° vent position allows optimal airflow below deck.
Questions? We're Here to Help
Have questions? Chat with us! Our MAURIPRO rigging and sailing specialists are available to help you find the right solution for your boat and sailing style.
Explore our selection: Lewmar Ultra Low Profile Hatch Size 60 - Cut Out: 50.7 x 50.7 cm (19 15/16 x 19 15/16 in) - External Handle (34960020) and related sailing gear at MAURIPRO.
