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Live forecasts update automatically; written guidance last reviewed 23 June 2026 by the Australia Pulse Weather Desk. Data from the Bureau of Meteorology (BOM) and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
The live forecast above shows Trevallyn experiencing a mild autumn afternoon, with temperatures in the low 20s Celsius and light north-easterly winds – a typical pattern for northern Tasmania when a high-pressure system sits over the Bass Strait.
What is the typical weather pattern for Trevallyn?
Trevallyn sits in the Tamar Valley, about 5 kilometres north-west of Launceston. Its climate is temperate, with average summer maxima reaching 24°C and winter minima dipping to 4°C. The valley’s topography funnels sea breezes from Bass Strait, moderating summer heat but also causing afternoon wind shifts. Rainfall averages around 680 mm annually, with a winter maximum and occasional fog in the morning.
How does the Tamar River influence local conditions?
The Tamar River estuary flows past the suburb and can produce localised fog or showers, especially when cool air meets the relatively warm water. In winter, frost is common in low-lying parts near the river, while summer afternoons often see a cooling north-easterly breeze that arrives by early afternoon.
Does Trevallyn ever get snow?
Snowfall is very rare at this elevation. Sleet may occur once or twice a year, but significant snow only settles on the higher slopes of Mount Arthur, about 20 kilometres east. Frost, however, is common from May to September.
What is the best season to visit Trevallyn?
Late spring (November) to early autumn (March) offers the most reliable warm weather, with daytime temperatures between 18°C and 24°C. Summer days are long, and the Tamar Valley wine region is at its peak during harvest in February and March.
How windy does it get in Trevallyn?
Winds are generally light to moderate, averaging 15–25 km/h. Strong north-westerlies can precede cold fronts in winter, while summer afternoons often see a steady sea breeze from the north-east. Gusts above 50 km/h occur only a few times a year.
Sources
For broader conditions, visit the Australia weather hub or compare with Melbourne Weather.