Michael McFadyen's Scuba Diving Web Site
Home Contact Me Sydney Reef Dive Sites Sydney Shipwrecks NSW Dive Sites Australian Dive Sites Overseas Dive Sites Dive Accidents and Incidents Our Yachting Adventures 4WD Trips Weather Search 22 November 2017 21:58
Navigation
Home

General
About Me
My Diving
FAQ
Downloads
Web Links - Dive Clubs
St George Scuba Club
Some of my Best Photos
Contact Me

Dive Sites
Sydney Reef Dive Sites
Sydney Shipwrecks
Kelly Talking on ABC Sydney about Shipwrecks
NSW Dive Sites
Sydney Shipwreck Summary
NSW Shipwreck GPS/Marks
Australian Dive Sites
Overseas Dive Sites
Aircraft I have Dived
Old Bottles

Dive Related Equipment
Shearwater Predator and Heinrichs Weikamp OSTC 2N
Uwatec Aladin Dive Computers
Apollo AV1 Underwater Scooter
Bauer Compressor
DIY Oxygen Stick - Nitrox
GoPro HD Hero Video Camera
My Camera Setup
Purchase of New Dive Boat
Our Dive Boat - Mak Cat
Our Old Dive Boat - Le Scat
My Dive Gear
GPS and Diving
Make Your Own Car Tank Rack

Marine Life
Rarer Sydney Marine Life
Bare Island Pygmy Pipe Horses
Bare Island Sea Horses
Bare Island Nudibranchs
Bare Island Marine Life
Encounter with Southern Right Whale and Calf

Other Dive Info
How Weather Affects Diving in Sydney
Visibility and Wave Averages in Sydney
Waves and Diving
Diving Weather and Sea Conditions
Tide Tables
Dive Accidents and Incidents
Dive Book Reviews
Site Map
Noel Hitchins 1951-2005
Lloyd Bridges - Mike Nelson in Sea Hunt
Our Yachting Adventures
Below is a list of links to the main pages about our yacht, Catlypso and our Our Yachting Adventures:
  • Purchase of Catlypso
  • Details about Catlypso
  • Cleaning/Repairing Catlypso
  • Our Yachting Adventures.
  • Login
    Username

    Password



    Forgotten your password?
    Request a new one here.
    Michael and Kelly's 4WD Trips
    Click here for a list of our Four Wheel Drive and Camping Trips.
    Current Kareela Weather
    A summary of the current weather conditions at our house at Kareela, Sydney, is below. Click here for more Detailed Diving Weather and Conditions. Weather from Michael McFadyen's Tempe Weather Station


    Conditions at
    23:49 on 23/1/17

     
    Temperature 25.6°C
    Humidity 65.0%
    Barometer 1003.4hPa
    Rate -0.3hPa/hr
    Wind Speed: 0 km/hr
    Wind Direction S
    Rainfall for Today 0.0mm
    Rainfall last hour 0.0 mm
    Rainfall last 24 hours 0.0 mm
    Rainfall at Start of Month 814.6 mm
    Rainfall this Year 827.0 mm
    Today's Extremes
    High Temperature 31.2°C at 15:48
    Low Temperature 20.9°C at 6:27
    Peak Wind Gust 0km/hr at 0:00
    Weather from Michael McFadyen's Kirrawee Weather Station
    Yesterday's Extremes
    High Temperature 27.5°C at 17:11
    Low Temperature 19.8°C at 6:29
    Rainfall at Start of Yesterday 827.0 mm
    Rainfall at End of Yesterday 827.0 mm
    Weather from Michael McFadyen's Tempe Weather Station
    Astronomical Data
    Sunrise 5:06
    Sunset 19:05
    Moonrise 1:09
    Moonset 15:04

    Home Brewing
    Click here for an article about Home Brewing.
    Sydney Dive Site Hints
    "The Balcony is a shallow dive with huge fishlife"
    Hole in the Wall - Heron Island
    On my trips to Heron Island in June 1989 and later in October 1989 for the Heron Island Dive Festival, I dived Hole in the Wall three times. Once was as a stand-alone dive but the other two were drift dives from Hole in the Wall to Coral Grotto. This article is just about the dive at Hole in the Wall.

    Like the majority of the dive sites at Heron Island, Hole in the Wall is located on the eastern side of the reef. It is east-north-east of the northern tip of the island.

    Click to enlarge
    A map of the dive sites of the northern side of Heron Island
    Click to enlarge

    Note this map was drawn in 1990 by Clarrie Lawler - used with his permission

    The actual Hole in the Wall that gives its name to the dive site is not at the mooring location (well, at least it was not in 1989) but a bit to the north-west. The mooring is located on one of a twin pair of coral bommies located about 20 metres off the main reef.

    Hole in the Wall
    A very rough map I drew of Hole in the Wall in 1989
    Note depths are in feet

    Once you descend, drop to the bottom of the twin bommies and circle around them. There can be some interesting life in the small canyon or crack that separates the two bommies. From here head south-west to the wall. You will see that there is a small bay to the south of you as you approach the wall. This can be explored towards the end of the dive. You may also notice a swim-through that goes from outside the main wall to the bay. Again, leave this for later.

    Turn right once you hit the wall and follow the fringing reef wall. This runs in a roughly south-east to north-west direction. The depth at the bottom of the wall is about 10 metres (I think my map does not show what it was). The wall is relatively straight till you come to an inlet. Just past here you will notice that the reef comes to an apparent dead end and there is a small bommie in the bay.

    The reef wall actually doubles back on itself in a U fashion. However, you do not need to backtrack as there is another way out. This is via the Hole in the Wall. In fact, there are two Holes in the Wall. As you start to do your U turn and follow the wall back in the same direction you have just come, you will see a swim-though on your left. You can easily swim through this and exit on the open ocean side of the reef.

    I would only go about 20 metres past here before turning around. Come back past the tunnel that you came through a few minutes ago and you will see another one just before the corner. Swim through the tunnel and you will be back in the dead end. Swim to your left and follow the wall back to the south-east to the starting point.

    Once back near the twin bommies and the corner of the bay where you first reached the wall, look for the swim-though I previously mentioned. This will take you into the bay. Spend the rest of your time in the bay and back at the twin bommies.

    This was one of the best dive sites I did at Heron Island. On one dive I saw 10 turtles, a white-tipped reef shark, a black whaler shark as well as Queensland groper and potato cod. In the swim-throughs I saw abalone and crayfish. Other things I saw included Moorish idol, yellowtail kingfish, sweetlips, flutemouth, fusilier, parrotfish and unicornfish.

    Note this article was written in 2008 so my memory may be a bit out with some aspects of the dive site and things may have changed in the almost 20 years since I last dived there.

    Copyright © Michael McFadyen 1990 to 2017
    Non-commercial use of an article or photograph is permitted with appropriate URL reference to this site.
    Dive shops, dive operators, publications and government departments cannot use anything without first seeking and receiving approval from Michael McFadyen.
    This web site has been wholly thought up, designed, constructed and funded by Michael McFadyen
    without any help from the Australian Dive Industry since 1996!