Portsea Hole
Located just 500m from Portsea Pier in Victoria, Australia, Portsea Hole offers a captivating underwater experience for divers of all levels. This dive site holds historical significance as it is a remnant of the old Yarra River. With its maximum depth of 20m, beginners can also explore this site with ease. The top of Portsea Hole rests at 14m, providing excellent visibility of up to 8m.
To the north of the hole, divers will discover a vertical wall spanning approximately 75m (250ft). This magnificent wall is adorned with small overhangs, creating a vibrant habitat for a diverse range of invertebrates and fish species. One highlight is the stunning Blue Devil fish, adding a touch of beauty to the underwater scenery.
On the upper part of Portsea Hole, several rock bommies create a haven for hundreds of fish, representing numerous species. This abundance of marine life makes Portsea Hole one of Victoria’s premier dive sites. Whether you are a beginner or an experienced diver, this location provides an excellent opportunity to further develop your skills or simply enjoy the wonders of the underwater world.
Discover the captivating dive site of Portsea Hole in Victoria, Australia. Dive into the remnants of the old Yarra River and explore the breathtaking vertical wall teeming with invertebrates and the beloved Blue Devil fish. With a maximum depth of 20 meters and visibility up to 8 meters, this site is perfect for beginners. Don't miss the opportunity to witness the vibrant marine life surrounding the rock bommies. Portsea Hole promises a memorable diving experience for all.
To the north of the hole, divers will discover a vertical wall spanning approximately 75m (250ft). This magnificent wall is adorned with small overhangs, creating a vibrant habitat for a diverse range of invertebrates and fish species. One highlight is the stunning Blue Devil fish, adding a touch of beauty to the underwater scenery.
On the upper part of Portsea Hole, several rock bommies create a haven for hundreds of fish, representing numerous species. This abundance of marine life makes Portsea Hole one of Victoria’s premier dive sites. Whether you are a beginner or an experienced diver, this location provides an excellent opportunity to further develop your skills or simply enjoy the wonders of the underwater world.
Discover the captivating dive site of Portsea Hole in Victoria, Australia. Dive into the remnants of the old Yarra River and explore the breathtaking vertical wall teeming with invertebrates and the beloved Blue Devil fish. With a maximum depth of 20 meters and visibility up to 8 meters, this site is perfect for beginners. Don't miss the opportunity to witness the vibrant marine life surrounding the rock bommies. Portsea Hole promises a memorable diving experience for all.
Diving Conditions Score for Portsea Hole
4.2
Below AverageChallenging conditions, for experienced divers only.
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Portsea Hole
Depth
20m
Visibility
8m
Experience Level
beginner
Weather Conditions for Portsea Hole
Wave Height
0.98m
Wind Speed
16.1 m/s
Water Temp
14.8°C
Visibility
400m
Cloud Cover
69%
Wave Period
10.75s
Air Temperature
9.4°C
Precipitation
0 mm
Detailed 7-Day Diving Forecast for Portsea Hole
Alpha
Dive Score Chart for Portsea Hole
Best time to dive: 9:00 with score 7.151011594202899/10. Water conditions: Waves 0.96m, Wind 5.1 m/s.Best night dive time: 5:00 with score 6.134522077922078/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Sunrise at Portsea Hole: 06:00
Sunset at Portsea Hole: 18:00
Optimal diving conditions at Portsea Hole are affected by daylight hours. Sunrise occurs at 06:00 and sunset at 18:00, which impacts visibility and water temperature for scuba diving and snorkeling.
Best Overall
9:00Score: 7.2/10
Waves: 0.96m (11.5s), Wind: 5.1 m/s
Best Night
5:00Score: 6.1/10
Waves: 1.02m, Wind: 3.6 m/s
Seasonal Analysis for Portsea HoleAlpha
Historical patterns and best seasons for diving at Portsea Hole
The dive score combines all factors to rate overall diving conditions throughout the year. Higher scores indicate better diving conditions.
Monthly Dive Score Analysis - Seasonal Diving Conditions
Higher values indicate better diving conditions
Seasonal DiveScore Chart
This chart displays monthly diveScore data throughout the year, showing seasonal patterns. The data is presented as a bar chart with an overlaid line graph.Dive scores range from 1 to 10, with 10 being optimal conditions.
Higher values indicate better diving conditions
Best Season for Portsea Hole
Summer
Avg. Score: 9.8/10
Summer offers the warmest water temperatures and generally favorable conditions for all levels of divers.
Best Months for Portsea Hole
July
Score: 9.9
June
Score: 9.8
August
Score: 9.7
Ideal Conditions for Portsea Hole
Water Temp
23.8°C / 74.8°F
June
Visibility
20.1m / 65.9ft
October
Wave Height
0.2m / 0.7ft
January
Wave Period
8.0s
January
Seasonal Insights for Portsea Hole
Portsea Hole follows southern hemisphere patterns with June being the warmest month (23.8°C) and December the coldest (19.8°C). The calmest conditions typically occur in January with average wave heights of 0.2m and wave periods of 8.0s. The most comfortable wave conditions are in January with a low wave steepness ratio, creating gentler swells. January offers the longest wave periods (8.0s), creating more comfortable and predictable conditions for boat entries and exits. Ocean currents are slowest in January (0.5m/s) and strongest in January (0.5m/s). January is usually the driest month with 0.0mm of precipitation. For beginners, the best time to visit would be during January to March, when ocean conditions are calmer with long-period waves and currents are typically weaker. Experienced divers might enjoy the challenges and potentially better visibility during the shoulder seasons, with moderate currents that can improve marine life encounters.
Last updated: 1 min. ago - Jun 22, 2026
Note: This dive site is not a verified dive site. Please dive with caution. This dive site might have incorrect information by the community.
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