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Live forecasts update automatically; written guidance last reviewed 23 June 2026 by the Coast Pulse Hub Weather Desk. Data from the Bureau of Meteorology (BOM) and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Grantville’s weather today, as shown in the live forecast above, is shaped by its position on Western Port Bay, with coastal conditions often differing from inland parts of the Bass Coast Shire.
What is the typical weather pattern for Grantville?
Grantville experiences a mild oceanic climate, with cool, damp winters and warm, often dry summers. Sea breezes from Western Port Bay can moderate afternoon temperatures, especially during summer, while winter brings persistent cloud and rain-bearing westerly winds.
- Summer (Dec–Feb): average maximums around 23–26°C, but hot northerly winds can push temperatures above 35°C before a southerly change arrives.
- Winter (Jun–Aug): daytime highs average 13–15°C, with overnight lows near 5–7°C. Rainfall peaks from May to October.
- Spring and autumn are transition seasons, often delivering the most stable weather for outdoor activities.
- Coastal fog is common in autumn and winter, particularly during mornings with light winds.
Does the bay influence Grantville weather?
Yes — Western Port Bay creates a local maritime effect that can keep Grantville cooler in summer and milder in winter compared to inland towns like Wonthaggi. The bay also drives the local grantville tides, which affect fishing and boating conditions.
- Afternoon sea breezes often arrive by early afternoon, dropping temperatures noticeably on hot days.
- Winter winds from the bay can increase chill factor, but the water body also prevents severe frosts.
- For coastal wind and tide updates, check the Australia weather hub or Melbourne Weather page for regional summaries.
How does Grantville relate to Melbourne weather?
Grantville’s weather closely follows patterns seen in melbourne weather but often arrives a few hours later. A cool change that hits Melbourne by mid‑afternoon typically reaches Grantville by late afternoon or early evening.
- Summer heatwaves in Melbourne often extend to Grantville, though coastal breezes can provide earlier relief.
- Winter cold fronts are usually less severe at the coast than in Melbourne’s inner suburbs.
- For real‑time tracking, the grantville weather radar (sourced from the Bureau’s Melbourne radar) shows incoming rain bands.
Is Grantville’s weather similar to Wonthaggi weather?
Not exactly — Wonthaggi is further south and more exposed to Bass Strait, making it consistently cooler and windier. Grantville, sheltered on Western Port Bay, tends to be slightly warmer and less breezy.
When is the best time to visit Grantville for fine weather?
Late summer (February to March) often brings the most settled conditions, with warm days, light winds, and lower humidity. Autumn is also reliable, though mornings can be foggy near the bay.
Can I get tide times for Grantville?
Yes — grantville tides are listed on local tide charts, with the closest official gauge at Stony Point. Check the Bureau of Meteorology or WillyWeather for daily high and low tide times.