Umbrella or board shorts? We take a look at the weather

WE CAN expect some more warm autumn weather this week, before a cooler change comes through on the weekend.

Lismore temperatures will hover in the mid to high 20s for the rest of the working week.

According to the Bureau of Meteorology, today will hit a top of 26C, with a top of 27C forecast for Friday.

But the warm days won't last forever.

Showers and a peak temperature of 23C is in store for Saturday and Sunday in Lismore, but it will be a degree or two warmer at Ballina.

Byron Bay can expect some windy, showery conditions on the weekend, with temperatures at about 23C and winds reaching up to 25km/h.

The weather bureau says this week's warmer temperatures are being caused by a high pressure system over the Tasman Sea, which is extending a ridge across southern New South Wales, while a trough lies off the central and northern coasts.

"Very little change in this pattern is expected until the next cold front reaches southern and western districts during Thursday, extending through to the north on Friday," BoM explains in its latest short-term forecast.

"Behind this, a strong high passing to the south is expected to push a ridge along the New South Wales coast during the weekend."

20-50mm of rain possible by the end of this week

20-50mm of rain possible by the end of this week

Some much-needed rain will "likely” fall across the Northern Rivers

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