Fishing charters run out of the islands for groups of up to eight people.
Accommodation on Thevenard Island starts from $140/night for a double room.
Accommodation options include Club Thevenard, two, three and five-bed cabins and Direction Island.
The Onslow Beach Resort rooms feature full kitchen and washing facilities.
The resort includes a pool, WiFi, boat hire and barbecue area.
Onslow Tourist Centre opening times vary and are available on the Shire of Ashburton website.
For more information visit http://mackerelislands.com.au.