It is well known that Melbourne can have “4 seasons in one day” but these small changes in weather generally do not effect diving. If it’s forecast rain, it doesn’t matter you’re already planning to get wet! When it’s raining you will often find that the wind dies down and surface conditions improve.
To gain the best idea for the weather forecast we use a variety of resources which area available online. These include:
This gives a local inside the bay forecast from Port Phillip Heads up to the city. It’s a good gauge for wind speed inside the bay.
This is the Central Coastal Forecast for outside Port Phillip Heads. This ranges from Cape Otway across to Wilsons Prom, then Port Phillip Heads down to King Island.
Meteye is a fantastic new interactive map and can be used to zoom in on your location. You can select wind and swell on the left hand side and then zoom into Port Phillip Heads. You can also look 4-7 days in advance.
Seabreeze is a windsurfing website which gives the wind, swell and temperature for Melbourne. Its swell prediction is usually more than the actual and is only good to look a maximum 4 days ahead.
This site gives you a look at the current conditions of the heads. Select Point Nepean for swell or Point Lonsdale for wind.
Its always important to note the period of the swell and direction of the wind as a 40k/hr Northerly wind is great for diving outside the heads but maybe too lumpy for Portsea Hole.
To transit Port Phillip Heads the significant swell must be less than 2 metres and wind less than 20kts from the Southerly half. All these sites are usually updated around 5am and 5pm each day. If we think the weather will cancel your trip we will either call or email following the update the day before so it is essential that you have given us all your details.
A large, slow moving high pressure system centred south of the Bight will continue to direct a southwesterly airflow across Bass Strait for the remainder of the weekend. The high will weaken as it moves eastwards across Victoria late Monday. A low pressure system will develop over the Bight region during Tuesday, then will move across Victoria on Wednesday.
Southwesterly 15 to 20 knots.
Westerly 15 to 20 knots turning southwesterly during the morning.
West to southwesterly 10 to 15 knots becoming variable below 10 knots in the middle of the day then becoming southerly 10 to 15 knots in the afternoon.
Variable about 10 knots tending southerly during the afternoon then tending easterly during the evening.
East to southeasterly about 10 knots tending south to southeasterly 10 to 15 knots during the afternoon then tending southeasterly about 10 knots during the evening.
Last Updated: 21/10/2017 10:00pm