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Weather Forecast

The Dive Victoria Group

Weather Forecast

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.

Forecast for Port Phillip and Western Port

Thursday, 17th August

A vigorous northwest to westerly airflow over Bass Strait will persist today. A cold front is then expected to approach southwestern Victorian coastal waters late Thursday and will sweep across Bass Strait on Friday. Winds will ease on Saturday as the next high pressure system approaches western Victoria late in the day. The high will move rapidly northeastwards during Sunday as the next front and associated low moves across the Bight towards western Victoria.

Forecast for Port Phillip

Thursday, 17th August

Strong Wind Warning for Thursday for Port Phillip

Northwesterly 15 to 25 knots tending west to northwesterly 20 to 30 knots in the middle of the day. Winds easing to 15 to 25 knots in the north during the evening. Stronger squalls with showers and thunderstorms.

Friday, 18th August

Strong Wind Warning for Friday for Port Phillip

Northwesterly 20 to 25 knots turning west to southwesterly 20 to 30 knots before dawn then tending south to southwesterly 15 to 25 knots in the evening.

Saturday, 19th August

South to southwesterly 15 to 20 knots tending west to southwesterly below 10 knots during the afternoon.

Sunday, 20th August

Variable about 10 knots becoming northerly 15 to 20 knots during the evening.

Last Updated: 17/08/2017 05:17am