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Live forecasts update automatically; written guidance last reviewed 23 June 2026 by the Australia Data Weather Desk. Data from the Bureau of Meteorology (BOM) and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Port Macdonnell is experiencing the conditions shown in the live forecast above, with a mild and often breezy coastal climate typical of the Limestone Coast. Summer days are warm but rarely extreme, while winter brings cool, damp weather and increased swell.
What makes Port Macdonnell’s weather different from Mount Gambier?
Port Macdonnell sits right on the Southern Ocean, so it is noticeably cooler in summer and less prone to frost than nearby Mount Gambier. The sea breeze often keeps afternoon temperatures several degrees lower than inland spots, while winter minimums stay milder due to the ocean’s moderating effect. If you are checking weather across South Australia, the coast here also sees more persistent cloud and a higher chance of drizzle than locations further north.
How do tides and swell affect the forecast?
The local swell and tides play a big role in deciding how the day feels along the foreshore. A combination of strong onshore wind and a large port macdonnell swell can produce hazardous surf, while port macdonnell tides influence beach access and fishing conditions. When planning outdoor activities, it pays to check both the wind direction and the tide chart alongside the weather in port macdonnell 10 days outlook.
Is Port Macdonnell windier than Adelaide?
Yes, generally. The exposed coast receives persistent afternoon sea breezes and strong fronts in winter, making it noticeably windier than sheltered spots in Adelaide weather. Wind speeds often exceed 30 km/h on spring afternoons.
When is the best time to visit for calm conditions?
Late summer and early autumn (February to April) tend to deliver the lightest winds and most settled swell. Sea breezes still develop, but they are less aggressive than the blustery winter westerlies that bring the biggest port macdonnell swell.
Does Port Macdonnell ever get frost?
Frost is rare right on the coast because the ocean keeps overnight temperatures milder. Inland suburbs of Mount Gambier can see several frosts each winter, but Port Macdonnell typically stays above 3°C even on cold July mornings.