Boat traffic/Rottnest ferry/boat wakes.Winds – the wind can be an aid!Pick the right time of day and you can use the wind to your advantage!Look at weather forecast – typically in Summer, an Easterly wind will blow in the mornings, then a South Westerly in the afternoon.The current/tide at the Fremantle end, near the Stirling Bridge can often be quite strong. Be aware of this.Stay away from the ocean side of the Stirling Bridge.At the end of the Blackwall reach section, the Kent Street jetty (end of Kent street) there is a small reef. Stay closer to the moored boats or any moorings as a guide. Water visibility is high so you can see if water gets shallow and if reef is visible.