STAR-ADVERTISER FILE Pedestrians and traffic deal with salt water on Ahua Street in Mapunapuna during king tides. A high surf warning remains in effect for south-facing shores across the Hawaiian Islands through 6 a.m. Tuesday, as a large south-southwest swell combines with king tides to produce dangerous surf, significant wave run-up and an increased risk of coastal flooding, according to the National Weather Service.

STAR-ADVERTISER FILE

Pedestrians and traffic deal with salt water on Ahua Street in Mapunapuna during king tides. A high surf warning remains in effect for south-facing shores across the Hawaiian Islands through 6 a.m. Tuesday, as a large south-southwest swell combines with king tides to produce dangerous surf, significant wave run-up and an increased risk of coastal flooding, according to the National Weather Service.

A high surf warning remains in effect for south-facing shores across the Hawaiian Islands through 6 a.m. Tuesday, as a large south-southwest swell combines with king tides to produce dangerous surf, significant wave run-up and an increased risk of coastal flooding, according to the National Weather Service.

Forecasters said surf of 10 to 15 feet is expected along south-facing shores, with the greatest impacts occurring during afternoon and evening high tides. The combination of the long-period swell and some of the highest tides of the month could lead to flooding on beaches, coastal roads, docks, boat ramps and other low-lying shoreline areas.

The warning covers south-facing shorelines on Kauai, Oahu, Molokai, Lanai, Maui and Hawaii island.

A coastal flood statement remains in effect through Tuesday afternoon for all islands. Forecasters said water levels are running higher than predicted in some locations, increasing the likelihood of saltwater inundation and minor coastal flooding, especially during late afternoon and early evening high tides.

The NWS warned that strong breaking waves and powerful currents could make channel entrances dangerous for boaters. Harbor surges and breaking waves are also expected at south- and west-facing harbors through tonight.

Residents are urged to avoid driving through flooded roadways, move vehicles and valuables to higher ground and monitor vessels to ensure mooring lines do not become overly tight as water levels rise. Beachgoers are advised to stay away from affected shorelines and be prepared for possible road closures.

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Meteorologists said the swell is expected to gradually decline Tuesday and Wednesday, although another pulse of south swell could arrive late Wednesday into Thursday and push surf back to advisory levels.

Weather conditions across the state are expected to remain generally dry and stable through Tuesday as moderate tradewinds continue. A drier air mass moving into the islands should limit shower activity to isolated windward and mauka areas.

For Oahu, Kauai, Maui County, today will be mostly sunny with isolated windward and mauka showers and highs between 82 and 87 degrees. Tonight will be mostly clear with a few windward showers and lows from 70 to 75 degrees. Tuesday will remain mostly clear with isolated windward showers and highs from 82 to 87 degrees.

On Hawaii island, today will be mostly sunny with isolated windward showers and scattered afternoon showers in leeward areas. Highs will range from 81 to 86 degrees. Tonight will be mostly clear with a few windward showers and lows from 69 to 74 degrees. Tuesday will be mostly clear with isolated showers and highs between 82 and 87 degrees.

Forecasters said winds will weaken during the second half of the week, allowing sea breezes to develop and increasing the chance for interior afternoon clouds and showers, particularly on Hawaii island and Maui.