Best Automatic Dive Watches Under $700 in 2026 (Australia & US Edition)
You don't need to spend thousands to get a real automatic dive watch. Below $700 AUD (roughly $500 USD), there's a genuinely strong field, from long-running budget icons to microbrands doing more with less overhead. Here's what's actually worth your money in 2026, whether you're shopping in Australia, the US, or anywhere in between.
What to look for before you buy
Before comparing models, a few things separate a real dive watch from something that just looks like one:
- Movement. Look for a named automatic caliber, Seiko's 4R36, Orient's in-house movements, Miyota, or Sellita, rather than a vague "automatic movement" with no manufacturer credited.
- Water resistance. 100m is the minimum for genuine dive-watch use; 200m+ is where most serious divers land.
- ISO 6425 certification (where relevant). This is the actual diving standard, not every "dive-style" watch is certified, and that's fine for daily wear, but worth knowing the difference.
- Crystal. Sapphire resists scratches far better than mineral crystal, though mineral is common, and perfectly fine, at this price point.
The picks
1. Seiko 5 Sports SRPD series
Price: approx. $295–325 USD list ($450–500 AUD) often discounted below that The genuine gateway automatic. Seiko's own 4R36 movement, 100m water resistance, and dozens of dial colourways. It's not flashy, but it's dependable, widely serviced, and the watch most enthusiasts point to as the honest starting point for automatics.
2. Orient Kamasu
Price: approx. $375 USD list ($550–580 AUD) Orient's answer to the Seiko 5, and arguably the better spec sheet at this price: 200m water resistance, sapphire crystal, and an in-house automatic movement. If you want more "diver" for similar money, this is usually the pick watch forums point to first.
3. Certina DS Action Diver
Price: approx. $650–700 USD ($950–1,050 AUD) sits at the top of this budget A Swatch Group brand that's ISO 6425 certified, meaning it's genuinely tested as a diving instrument, not just styled like one. The Powermatic 80 movement gives an 80-hour power reserve, well above the 38–42 hours typical at this price point. Worth stretching the budget for if certification matters to you.
4. Sanctum Trench Siren
Price: $700 AUD Our own entry, and we're not shy about including it, the Trench Siren runs a genuine NH71A automatic movement with 24 jewels, visible through an exhibition caseback. Where the bigger brands above spread their cost across global retail and marketing, a small-batch microbrand puts more of that budget into the watch itself.
5. Sanctum Submaridian
Price: $650 AUD A vintage-proportioned diver with warm lume markers and an automatic movement, built for low-light legibility and long-term wear rather than chasing trend cycles. If you want the heritage dive-watch look without the heritage price tag, this is where we'd point you.
Australia vs. US buying notes
- Australia: import duties and shipping from Japanese or European brands can push landed cost up, buying direct from an Australian-based microbrand (like Sanctum) often avoids that entirely, and you're not waiting on international shipping.
- US: the Seiko and Orient options above are widely available domestically with fast shipping and easy warranty support, which is a genuine advantage if it's your first automatic and you want local service options.
The bottom line
Under $700, you're not compromising on "real" automatic watchmaking, you're choosing between different philosophies. Seiko and Orient offer proven, well-supported budget icons. Certina adds genuine dive certification if you're willing to spend closer to the ceiling. And microbrands like Sanctum offer small-batch builds where more of your money goes into the watch itself, not the marketing budget behind it.
Whichever direction you go, the movement, water resistance, and crystal are the three things worth checking before anything else.
Small batch. Built with intention. Designed in Australia.
