Get out your jandals and sunglasses because a high pressure system is bringing warm spring weather to Northland, with the temperature set to soar to a summer-like 25C.

Today is the first day of spring and the high pressure means happy weather, according to one weather expert.

National Institute of Water and Atmospheric Research meteorologist Ben Noll said subtropical winds flowing south from near New Caledonia this week will at times make it feel more like November or December.

"The high brings happy weather," Mr Noll said. The strong, high pressure was forecast to pass over the north and then move northeast, drawing warmth southward.

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"This pattern may repeat several times during the first half of September. As a result, a couple of rounds of record-breaking maximum and minimum temperatures are possible," Mr Noll said.

"We are forecasting unseasonable warmth [today and tomorrow] across the east of both islands, where temperatures may rise to between 5 and 10C above the average maximum daily temperature. Some places may approach 25C."

While it might be good news for tomorrow, during the evening and into early Saturday morning there is likely to be rain in pockets across Northland.

But for those intending to hit the water and enjoy the ocean on Saturday afternoon, the sun will be out with westerly winds forecast.

Meanwhile, winter has left a trail of records in its wake and has certainly made its contribution to this year so far being the warmest on record.

The highest winter temperature was 25.1C, at Napier on June 10. This was also the highest winter temperature ever for Napier.