Vog and the potential for heavy rainfall will stick around today as a cold front northwest of the state draws moist, southerly wind across the islands, the National Weather Service said.

This morning, southeasterly wind might bring showers to the windward and southeastern slopes of Kauai and Oahu. Those showers could shift to leeward areas in the afternoon as the sun heats up the islands, said forecaster Norman Liu.

The southeasterly wind will continue bringing vog from Hawaii island to the smaller islands. But during the day, Liu said, the wind will shift to more easterly wind, which should help reduce vog.

The cold front that caused the current spell of wet, voggy weather was about 300 miles northwest of Kauai on Monday night and moving west, Liu said.

Tradewinds were expected to begin building tonight and strengthen across the state Wednesday. A high to the northeast will keep tradewinds blowing into the weekend.

Meanwhile, a swell that brought an out-of-season bump in surf to the north-facing shores of Oahu will ease through midweek.

Surf is expected to be 5 to 7 feet today along north-­facing shores and 3 to 5 feet along west-facing shores. South-facing shores are forecast to see surf of 2 to 4 feet.