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Check 'Weather or not' you should be on the water
Use our Waves Seas and Swell guide to see how wave height affects different vessel sizes. It’s a simple warning system to help you assess safety based on your boat and the swell forecast.
Get the Deckee app for the latest weather conditions, safety information and alerts for WA.
Recreational moorings now available for casual, short-term use in some of WA's best boating locations,
Find rules, safety advice and guides for boating in WA.
DTMI publishes nautical charts of the WA coastline for use by recreational and local commercial vessels.
Latest Marine news
Department’s work helps stage safer SailGP event
12 Jan 2026
In a first for an aquatic event approval in WA, the Department undertook detailed three-dimensional mapping of the seabed off Fremantle.
New Bunbury breakwater: on schedule and budget
18 Dec 2025
DTMI’s reputation for delivering high quality major coastal infrastructure projects is further enhanced with the recent completion of rock work on the new 460 metre northern breakwater at Casuarina Boat Harbour at Bunbury.
Early milestone in connecting harbour to Fremantle’s heart
16 Dec 2025
Facilities have been improved for those walking, wheeling and riding to Fremantle Fishing Boat Harbour with the introduction of bike racks, seating and shading in a new arrival zone.
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