Updated Daily by Local Dive Experts
Welcome to Sydney's most reliable and up-to-date dive conditions page. Every morning, our team checks the tides, visibility, water temperature, swell, and weather to recommend the best local dive sites for the day.
Whether you're planning a weekend dive, checking if today’s conditions are safe, or just dreaming about your next underwater adventure, this is your go-to source. Bookmark this page and check back daily for the latest updates.
Sydney Diving Conditions – 19 September 2025
Updated Daily by Local Experts
Sunny through the morning with a slight chance of a shower later this afternoon and evening. Winds will be light early, becoming N–NE 15–20 km/h around midday before tending N–NW in the early afternoon. Maximum air temperature will reach 24°C. A 0.7 m ENE swell at 5.8 seconds is creating only light surface chop with little surge below. Visibility is holding at 5–8 m, improving with the afternoon incoming tide. Bare Island is today’s best site for protection and consistent marine life.
Conditions at a Glance
Weather: Sunny morning. Slight chance of a shower late afternoon and evening. Winds light, tending N–NE 15–20 km/h midday then N–NW early afternoon.
Air Temperature: 24°C
Water Temperature: 19°C
Visibility: 5–8 m
Swell: 0.7 m ENE @ 5.8 s
Tides: Low 12:20 pm 0.49 m; High 6:42 pm 1.72 m
Recommended Site: Bare Island — Best this afternoon on the incoming tide for cleaner water and easier navigation.
Detailed Report
Conditions are favourable across Sydney today with a small ENE swell and light winds for most of the day. Surge will be minimal underwater, though some surface chop may be present as winds freshen from the NE midday. Visibility is sitting at 5–8 m, with clearer water expected on the afternoon incoming tide. Bare Island is the best option, offering shelter from the ENE swell, safe entry points, and reliable sightings of seadragons and blue gropers. Other south-side sites such as Oak Park and Kurnell are also diveable.
Tide Strategy: The afternoon high tide at 6:42 pm is the prime dive window, bringing in fresher ocean water and improved visibility. The midday low tide (12:20 pm) may leave some shallows murkier, so later dives are recommended.
Preparation: Water remains at 19°C. A 5–7 mm wetsuit with gloves is recommended for warmth and protection; a hood is optional at this temperature. Carry a torch to help with spotting marine life in turbid patches or under ledges.
Dive Tips for Today:
- Dive Bare Island this afternoon for the best combination of shelter and visibility.
- Plan dives around the 6:42 pm high tide for clearer conditions.
- Expect 5–8 m visibility — good for marine life encounters but not wide-angle photography.
- Other sites like Oak Park and Kurnell are diveable but less sheltered from ENE swell.
- Wear a 5–7 mm wetsuit at 19°C.
Additional Notes: There is good diving across Sydney today. Afternoon dives on the incoming tide will deliver the best visibility and the most enjoyable conditions.
Safe dives and happy bubbles!
Weekend Dive Forecast
We update this forecast daily based on the latest swell, wind, and visibility predictions. The closer we get to the weekend, the more reliable it becomes — by Wednesday, it’s generally accurate enough to plan your dives confidently.
Forecast for the weekend, September 20-21, 2025
See which dives are running this weekend and grab your spot before they fill.
Book a Dive – View this Weekends Calendar → 
Latest Dive Report – As Seen Underwater Within the Past 24 Hours
Note: As always, it’s important to check out the particular site before committing to it. While we strive to provide the most accurate information, diving conditions can change rapidly. Always check the latest updates before you head out.
When choosing your dive site to get the best conditions, we make the following recommendations:
How Conditions Affect Dive Sites
Lilli Pilli – Best on an incoming tide
Well-protected against all swell. Exposed to strong Westerly winds.
Ship Rock – Best 15 minutes before high tide
Not exposed to any swell. Best on a high slack tide.
Bass & Flinders – Best on an incoming tide
Good except for a NE swell greater than 1.4m.
Oak Park – Best on low tide
Should not be dived if SE to N swell is greater than 0.7m.
VooDoo – Best on high tide
Best with SW to NW swells. All other swells must be under 0.5m.
Cape Solander – Tide has no effect
Best with SW to NW swells. Other swells must be below 0.7m.
The Leap – Best near high tide
Should not be dived if E to S swell is greater than 1m. Best on an incoming tide.
The Steps – Swell-sensitive
Protected, but exposed to E to ESE swells greater than 1m.
Sutherland Point – Best on an incoming tide
Well protected. Only exposed to ESE swell greater than 1.8m.
Bare Island – Best with N swell and incoming tide
Should not be dived if S swell is greater than 1.2m.
Shelly Beach – Sheltered and beginner-friendly
Should not be dived if swell is greater than 0.8m. Protected from all but westerly swell.
Understanding Water Visibility in Sydney
What affects water visibility in Sydney?
Water visibility is influenced by tides, swell direction, weather, and even seasonal algae blooms. After rain or storms, visibility tends to drop due to sediment stirred up in the water.
How do tides impact visibility?
Slack high tide often provides the best visibility, as water movement slows and particles settle. Many Sydney sites are clearest just before high tide.
What’s the typical visibility range?
Visibility usually ranges from 5m to 10m but can exceed 20m in winter or drop below 2m after several days of heavy rain. July to October offers the clearest conditions.
Where are the best spots for good vis?
Sites like Shelly Beach, Bare Island (east side), and Ship Rock are known for consistent visibility—especially during high tide with minimal swell.
Sydney Water Temperatures by Month
Diving in Sydney is great all year, with mild seasonal changes that affect both water temperature and visibility. Whether you prefer warmer dives or crystal-clear winter water, there's always a great dive site to suit the season, making it the best to dive Sydney.
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Water Temperature: Ranges from 15°C (winter) to 25°C (summer)
Visibility: Typically 5–10m, up to 20m from July to October
Best Clarity: Winter (July–October), when seas are calm and algae is low
Here’s how Sydney’s sea temperatures shift throughout the year:
| Month | Min °C | Max °C |
|---|---|---|
| January | 21.5 | 25.1 |
| February | 22.1 | 25.3 |
| March | 21.6 | 25.3 |
| April | 20.8 | 24.6 |
| May | 18.8 | 22.6 |
| June | 17.5 | 21.1 |
| July | 17.3 | 20.9 |
| August | 17.4 | 20.2 |
| September | 17.2 | 19.9 |
| October | 17.5 | 20.9 |
| November | 19.1 | 22.1 |
| December | 19.5 | 24.3 |
What to Expect: Sydney offers a diverse diving experience year-round. In summer (Dec–Mar), enjoy warmer waters and active marine life, ideal for newer divers. Autumn and spring bring steady conditions and great critter sightings. Winter (Jul–Oct) delivers the clearest visibility, making it perfect for photography, deep dives, and encounters with weedy sea dragons. With the right gear, every season is dive season in Sydney!
Diving in Sydney: Your Questions Answered
When is the best time to dive in Sydney?
Sydney is great for diving year-round. For the calmest seas and clearest visibility, July to October is ideal. Water is warmer from October to May, making it popular for beginners.
Is Sydney good for beginner divers?
Absolutely! Sites like Shelly Beach and Bare Island offer easy shore entries, shallow depths, and protected conditions — perfect for new divers.
How’s the visibility for diving in Sydney?
Visibility typically ranges from 5 to 10 metres, with the clearest conditions from July to October. After heavy rain, it can drop to 1–2 metres.
What’s the average water temperature for diving in Sydney?
Expect temperatures from around 15°C in winter to 25°C in summer.
Are there strong currents at Sydney’s dive sites?
Most popular sites around Sydney have mild currents, suitable for divers of all levels. Tidal flow can affect some locations, so timing matters.
What marine life can I see while diving in Sydney?
You may spot weedy sea dragons, wobbegong sharks, blue groupers, cuttlefish, octopus, and even seals or dolphins.
Should I wear a wetsuit when diving in Sydney?
Yes. Most divers use a 5–7mm wetsuit year-round. In summer, a 3–5mm suit or shorty is okay for shallow dives, but conditions can vary.
How can I check diving conditions before heading out?
Check this page daily for updated reports. You can also use apps like Seabreeze or WillyWeather for swell, tide, and wind forecasts. Or just call us!
Still have questions?
Contact Us or Ask Our Team
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