Sunscreen and Umbrellas: A Mixed Saturday Forecast for Wollongong

A Changeable Start to the Weekend

Residents across the Illawarra should prepare for a day of shifting conditions this Saturday, 21 March 2026. The forecast indicates a blend of high humidity, significant sun exposure, and the likelihood of passing showers. While the mercury will remain relatively mild, the high chance of precipitation means outdoor plans may require a backup option. The Bureau of Meteorology has signaled a 70% chance of rain throughout the day, with potential totals reaching up to 9 mm.

Morning: Humid Conditions and Rising UV

The day is expected to begin with a temperature of approximately 22°C during the morning hours. Humidity will be high, hovering around 77% to 80%, which may make the air feel slightly heavier than the thermometer suggests. Despite the cloudy outlook, the sun’s intensity is a primary concern for early risers. Sun protection is officially recommended starting from 9:50 am, as the UV Index is predicted to reach 7, classified as 'High'. Local residents are advised to wear hats and apply sunscreen even if the sky appears overcast.

Afternoon: Peak Heat and Showers

As we move into the afternoon, Wollongong will reach a maximum temperature of 24°C. This period marks the highest probability of rainfall, with isolated showers expected to move across the coast. While the total volume of rain is forecast to be between 0 mm and 9 mm, the 70% probability suggests that most parts of the city will see at least a dampening of the pavement. A steady south-easterly breeze of approximately 17 km/h (4.8 m/s) will provide some relief from the afternoon humidity, though it may also bring more frequent cloud cover from the Tasman Sea.

Evening and Night: A Cool Coastal Breeze

Conditions are expected to stabilize slightly by the evening, with temperatures resting near 23°C before dropping to an overnight low of 19°C. The chance of rain decreases as the sun sets, though some light drizzle may persist into the late hours. The wind will remain south-easterly, maintaining a consistent coastal influence that will keep the night air mild but moist.

Saturday Weather Summary

• Temperature Range: A minimum of 19°C and a maximum of 24°C.
• Rainfall: 70% chance of showers, with estimated totals between 0 mm and 9 mm.
• UV Index: High (Level 7); protection required between 9:50 am and 4:10 pm.
• Wind: South-easterly winds averaging 17 km/h.
• Humidity: High levels expected, peaking near 80% during the morning.