Whyalla's new foreshore jetty opened in September 2020, replacing an older town jetty. It is a pre-cast, fibre-reinforced concrete structure about 165 m long – 38 m longer than its predecessor – ending in a distinctive circular loop that adds another 150 m of walkway. It was designed as a community promenade and fishing platform, with LED lighting built into the handrails, six fishing stations with sliding sleeves for children and people with disabilities, and an access ramp.

A separate swimming enclosure lies inside the marina. No dive guides or dive-shop listings describe the jetty as a dive site, and it is included here only because the regional brief names a 'Whyalla jetty'. Concrete piles in upper Spencer Gulf would be expected to develop sponge, ascidian and algal growth over time, attracting tommy ruff, garfish, squid and blue swimmer crabs, but at only a few years old the growth is likely to be modest.

For divers visiting Whyalla, the meaningful sites are the cuttlefish aggregation at Stony Point (May-August), Point Lowly, the old 1901 ore jetty (see Whyalla Old Jetty), Marek's Reef and the Leeton tug. The foreshore jetty is better enjoyed as a walk and a place to watch dolphins and fishers. The foreshore precinct around the jetty has parking, toilets, a playground and the marina swimming enclosure, making it a convenient place for non-diving family members while others dive elsewhere.

Whyalla is about 390 km (4-4.5 hours) from Adelaide via Port Wakefield, Port Augusta and the Lincoln Highway, or a 45-minute flight. The jetty is on the Whyalla foreshore beside the marina and foreshore park in the town centre, with parking and facilities nearby. It is a fishing and promenade jetty with LED-lit handrails and a disability-access ramp.

There is no published diver entry point; confirm with Whyalla Dive Shop whether diving or snorkelling from it is permitted before entering.

Upper Spencer Gulf has no ocean swell; wind and tide control conditions. Strong southerly and south-westerly winds blow straight up the gulf and raise a short, steep chop, and northerlies stir the shallow water along the northern shores. Tides are large for South Australia (over 2 m on springs) and run hard around Point Lowly and in the shipping channels, so boat sites should be dived at slack water – visibility is often excellent (15-20 m+) at slack and murky when the tide runs.

Winter (May-August) brings the calmest mornings and cold water (11-13°C); summer water reaches the mid-20s but afternoon sea breezes are common.

If permitted, a short shallow circuit of the piles and loop; otherwise use the marina swimming enclosure for a snorkel.

No operator; not a listed dive site.