Alexandria Bay or Castaways Beach: Noosa Compared
Published 2026-08-28. Conditions described are typical and never guaranteed.
The verdict up front
These are the two Noosa beaches for people who want the coast without the coffee queue, and they solve the same craving in slightly different ways. If your ideal morning starts with a walk that earns the beach, a beach you reach on foot through the bush with not a single building in sight, go to Alexandria Bay. If you want that same wild openness but you would rather park the car, grab a towel and be on the sand in a couple of minutes, with a toilet and a shower on hand, choose Castaways Beach.
Both are open Pacific surf beaches. Both are unpatrolled, with real waves and current, which means neither is a casual family paddle and both reward confident swimmers who read the sea honestly. So the decision rarely comes down to which is prettier. It comes down to effort, facilities, whether you are bringing a dog, and how far from another human you want to sit. Get those four things straight and the answer picks itself.
Access is the whole argument
The single biggest difference between these two is how you arrive, and for most readers it decides everything.
Alexandria Bay sits inside Noosa National Park and has no road to the sand. The usual approach is the Tanglewood track from the park entrance, roughly forty five minutes each way on foot. You wear real shoes, you carry water, and you time your return for daylight. That walk is the filter. It is why the beach stays quiet, why the sand often carries only a few sets of footprints, and why it feels genuinely remote rather than remote in the brochure sense. It is also why you should not treat it as a spontaneous swim. This is a half day out with a hike bolted onto both ends.
Castaways asks almost nothing of you. It is about 7 kilometres south of Noosa Heads, reached through the residential streets that back the beach, with street parking and a short walk over the dunes to the sand. No gate, no fee, no trek. You can be barefoot on an empty stretch within minutes of stepping out of the car. For anyone travelling with kids, a dog, a cooler, or simply a limited appetite for walking, that convenience is worth a great deal.
Simple test: if the forty five minute walk sounds like part of the pleasure, Alexandria Bay is your beach. If it sounds like a tax, Castaways gives you the same empty coast with the car nearby.
Sand and setting
Both beaches deliver that long, uncommercial Noosa feel, but the character differs.
Alexandria Bay is a long open crescent of pale gold sand backed by low coastal bush, broad at low tide and beautifully bare. Because you can only walk in, and because the northern stretch is a long established clothing optional beach, the mood is quiet and easygoing in a way few beaches on this coast still manage. It is the more secluded of the two, hands down, and the light through the drier months is genuinely lovely.
Castaways is a wide, straight run of golden sand backed by bushland and national park, part of the quiet stretch between Sunrise and Peregian. It feels remote and uncommercial too, and it ranks among the least crowded beaches on a popular coast, but it does not feel as sealed off from the world as Alexandria Bay, because it is not. Houses sit behind the dunes and the access tracks bring in local walkers at dawn. That is a fair trade for most people: slightly less wilderness, considerably less effort.
The water, and the honest safety line
This is where the two beaches are more alike than different, and where I want to be plain.
Neither is patrolled. Neither has a lifeguard, flags, or help on hand. Both are open, east facing surf beaches that can carry waves and rip currents, and conditions change from day to day and are never guaranteed one way or the other. On a gentle day, a strong and confident swimmer can enjoy either. On any real swell, the sensible call at both is to walk instead of swim, stay within your depth, and keep children close. Read the sea before you commit, every time.
Alexandria Bay is described as an exposed break with rip currents and no lifeguard, lively for confident swimmers and surfers rather than a calm bathing bay. Castaways is likewise an open ocean surf beach with a break that local surfers favour and water that can carry current. In practice they sit in the same risk bracket, so do not choose between them on safety, because neither offers any.
If patrolled water is what you actually want, that is a different beach entirely. The calm, flagged, family friendly option is Noosa Main Beach, one of the rare north facing town beaches in Australia, patrolled every day of the year and lined with cafes. When you are travelling with young children or nervous swimmers, that is the honest recommendation over either of the two beaches on trial here.
Facilities: the deciding detail for a full day
Here the gap is wide, and it flips the answer for a lot of readers.
Alexandria Bay has no facilities at all. No cafe, no toilets, no bins, no built shade beyond the bush at the back of the sand. You carry in everything, including water, sun cover and food, and you carry all your rubbish back out. The nearest food and drink are a walk away in Noosa Heads. This is a virtue if you want true solitude and a burden if you want a comfortable day with kids.
Castaways, by contrast, has the basics where it counts. Near the access you will find toilets, a shower, benches and a bottle filling station. What it does not have is any esplanade, cafe or shop within walking distance, so you still bring your own food and water for the day. Think of it as self sufficient rather than serviced: enough to rinse off and refill, not enough to feed you.
- Alexandria Bay: nothing on the beach. Pack for total self reliance.
- Castaways: toilets, shower, benches, bottle filling station near the access. No cafe within walking distance.
Bringing a dog
If a dog is coming, the contest is over. Castaways is a dog friendly beach and a favourite with local dog walkers, and there is a dog wash near the beach access, which is a rare and welcome touch. Check the current Noosa Council signage for on leash and off leash times, and bring water for the dog since there is nothing to buy nearby. Alexandria Bay sits inside a national park reached by a long bush track, which makes it the wrong choice for a dog day out. For four legged company, Castaways wins clearly.
Crowds and mood
Both are quiet by Noosa standards, which is the point of coming. Alexandria Bay is the quieter and more private of the two, thanks to the walk in access and its long standing easygoing, clothing optional character. If your priority is to feel genuinely away from the crowds, it edges ahead. Castaways is close behind and still feels remote, especially at first light when the sun comes up over the water and there is almost no one else on the sand. That early walk with the national park behind you is the beach at its best.
When each one wins
Choose Alexandria Bay when the walk is part of the appeal, when you want maximum seclusion, when you are happy to be completely self sufficient for the day, and when the clothing optional, hike in atmosphere is exactly what you are after. It suits confident walkers and swimmers chasing a proper reset.
Choose Castaways when you want the same long, empty, uncommercial coast without the forty five minute trek, when you are bringing a dog, when you want a toilet and a shower on hand, and when a sunrise walk followed by an easy drive home is the plan. It is the more practical of the two by a distance.
And remember the beaches that beat both when your needs change: for patrolled family swimming and a walkable lunch, Noosa Main Beach; for a sheltered, calmer snorkel, Little Cove; and for another open surf beach that comes with a genuine village of cafes behind it, Peregian Beach. If seclusion above all is the brief, our guide to the region's quietest stretches of sand is the place to start, and couples deciding between the two may find the couples' shortlist helpful.
Prefer a day bed to a bush track
Neither of these beaches comes with a sunlounger, a bar tab or a booking. If your ideal Noosa day involves shade, service and a reserved spot rather than a rucksack and a walk, browse the destination's beach club options to enquire about a club day, then keep Castaways or Alexandria Bay for the morning you want the coast entirely to yourself.