Surf: Triggs Beach needs the same conditions (strong SW swell, incoming tide, E winds) to get the gutless rights and lefts working near the observation tower. Environment: Triggs 1 and 2 refer to the defined right reefs at the end of Cliff Ave. Around the corner at the Onkaparinga rivermouth are some more scattered reef and beachbreaks that can draw in available swell and peel nicely, all the way up to the Hump at the Port Noarlunga reef.