WEBCAMS North to South
DIVE SITES AROUND SYDNEY
On this website you can see some shore dive sites maps and descriptions, complementary to what is the most comprehensive reference: Michael McFadyen’s website. If you are looking for coordinates for a boat dive you can convert Michael’s ones (in AUS66 format) into the more common WGS 84 with this converter and then save them in Google Maps or with a specific navigation free app such as Commander Compass Go or Pure GPS for your smartphone.
Also, no descriptions but a very convenient kmz file with hundreds of locations you can load into Google Earth from Wayne Heming website.
Other coordinates for the artificial reefs of Botany Bay.
SATELLITE PICTURES FOR CHECKING THE COASTLINE SEABED
Googlemaps - generally poor visibility of the seabed due to glare from the sun at the zenith but if you install the free Google Earth application you can browse old satellite imagery and find better images (yet not recent).
SIX Maps by NSW Government (excellent seafloor visibility if you don’t zoom in too much)
Whereis maps another set of maps worth checking, for satellite images select the layer bottom right in the page
Microsoft Bing worth checking as it usually has good pictures with little sun glare
SATELLITE PICTURES FOR CHECKING WATER QUALITY
From Sentinel, a satellite picture available every few days, in this link you can see the runoff after heavy rain in March 2021, change the date for checking current conditions
BY NSW Office of Environment and Heritage: KML file to be loaded into Google Earth representing the most extensive mapping of the seabed in NSW. Data is from 2013 and uses a number of technologies described here. Be mindful that empirical evidence suggests the maps are not reliable for diving nowadays. Compared to the maps I have put together by direct observation with GPS (Cabbage Tree Bay, Shark Point, Curl Curl, Queenscliff) there can be a difference of up to 100m in the position of the sand line. Whether is due to movement of the sand or intrinsic limit of the technology I don't know.
BY NAVIONICS: Underwater topography
Video recording of a very informative presentation by our member Jack Hannan on the factors affecting visibility in Sydney
iNaturalist - once you create a (free) account you can upload fish pictures and in a few seconds the iNaturalist will suggest the most similar fish identities
Fishes of Australia - comprehensive list of the fish of our waters, scroll the gallery to find what you are looking to identify
Nudibranch of NSW - by CSIRO
If you have any other good link worth sharing send me a message!