Hilo

Rest Of Today: Mostly sunny in the morning then becoming partly sunny. Isolated showers. Highs 82 to 88 near the shore to around 73 at 4000 feet. Southeast winds up to 15 mph. Chance of rain 20 percent.

Tonight: Mostly cloudy. Showers in the evening, then showers likely after midnight. Lows 66 to 71 near the shore to around 55 at 4000 feet. Northwest winds up to 10 mph. Chance of rain 80 percent.

Saturday: Partly sunny with showers likely in the morning, then mostly sunny with scattered showers in the afternoon. Highs 82 to 88 near the shore to around 73 at 4000 feet. Northeast winds up to 15 mph. Chance of rain 70 percent.

Kona

Rest Of Today: Mostly sunny. Isolated showers in the afternoon. Highs around 85 near the shore to around 71 near 5000 feet. Northwest winds up to 10 mph. Chance of rain 20 percent.

Tonight: Partly cloudy. Isolated showers in the evening. Lows 69 to 76 near the shore to around 55 near 5000 feet. Light winds. Chance of rain 20 percent.

Saturday: Mostly sunny in the morning, then partly sunny with scattered showers in the afternoon. Highs 82 to 87 near the shore to around 70 near 5000 feet. Northwest winds up to 10 mph. Chance of rain 30 percent.

Waimea

Rest Of Today: Mostly sunny. Isolated showers in the afternoon. Highs around 84 near the shore to 75 to 82 near 3000 feet. Northeast winds up to 15 mph. Chance of rain 20 percent.

Tonight: Mostly cloudy with scattered showers. Lows around 68 near the shore to 55 to 62 near 3000 feet. East winds up to 15 mph. Chance of rain 50 percent.

Saturday: Breezy. Mostly sunny with scattered showers. Highs around 84 near the shore to 75 to 82 near 3000 feet. East winds 10 to 25 mph. Chance of rain 50 percent.

Kohala

Rest Of Today: Mostly sunny. Isolated showers in the afternoon. Highs around 84 near the shore to 75 to 82 near 3000 feet. Northeast winds up to 15 mph. Chance of rain 20 percent.

Tonight: Mostly cloudy with scattered showers. Lows around 68 near the shore to 55 to 62 near 3000 feet. East winds up to 15 mph. Chance of rain 50 percent.

Saturday: Breezy. Mostly sunny with scattered showers. Highs around 84 near the shore to 75 to 82 near 3000 feet. East winds 10 to 25 mph. Chance of rain 50 percent.

South Big Island

Rest Of Today: Mostly sunny. Breezy. Isolated showers in the afternoon. Highs around 84 near the shore to around 74 near 5000 feet. East winds 10 to 20 mph decreasing to up to 20 mph in the afternoon. Chance of rain 20 percent.

Tonight: Partly cloudy. Breezy. Scattered showers in the evening, then isolated showers after midnight. Lows around 70 near the shore to around 53 near 5000 feet. Northeast winds up to 20 mph. Chance of rain 50 percent.

Saturday: Breezy. Mostly sunny with isolated showers. Highs around 86 near the shore to around 73 near 5000 feet. East winds up to 25 mph. Chance of rain 20 percent.

Puna

Rest Of Today: Mostly sunny in the morning then becoming partly sunny. Isolated showers. Highs 82 to 88 near the shore to around 73 at 4000 feet. Southeast winds up to 15 mph. Chance of rain 20 percent.

Tonight: Mostly cloudy. Showers in the evening, then showers likely after midnight. Lows 66 to 71 near the shore to around 55 at 4000 feet. Northwest winds up to 10 mph. Chance of rain 80 percent.

Saturday: Partly sunny with showers likely in the morning, then mostly sunny with scattered showers in the afternoon. Highs 82 to 88 near the shore to around 73 at 4000 feet. Northeast winds up to 15 mph. Chance of rain 70 percent.

Waikoloa

Rest Of Today: Sunny. Highs around 85 near the shore to 68 to 75 above 4000 feet. North winds up to 15 mph.

Tonight: Partly cloudy with isolated showers. Lows 70 to 76 near the shore to 51 to 59 above 4000 feet. Southeast winds up to 15 mph. Chance of rain 20 percent.

Saturday: Mostly sunny. Breezy. Isolated showers in the afternoon. Highs around 86 near the shore to 70 to 76 above 4000 feet. Northeast winds up to 25 mph. Chance of rain 20 percent.

Detailed Forecast

Synopsis

Showery cloud band remnants will move across Kauai today. Trade winds will push over the eastern end of the state late this afternoon and will bring a band of moisture along with it. This moisture will spread westward as the trades fill in across the rest of the state tonight and Saturday. A typical trade wind weather pattern is expected for the weekend and into next week.

Discussion

A ragged showery cloud band lingers across Kauai this morning and will bring light to moderate showers to that island through today. Elsewhere, overnight land breezes cut off shower activity and cleared skies over land. Cloud cover will likely increase once again over mauka areas as daytime heating sets in. Expect trade winds to gradually return beginning this afternoon as high pressure strengthens northeast of the state. Models show increasing showers as the trades spread westward, starting with windward areas of the Big Island this afternoon. By Saturday afternoon, trade winds will spread statewide.
Models show a moderate to locally breezy trade wind pattern across the state for next week, with showers riding in with the trade winds each day. Ridging aloft will keep our airmass stable, limiting total rainfall amounts. However, an increase in cloud and shower coverage is possible towards the middle of next week.

Aviation

A dissipating stationary front near Kauai will bring enhanced shower activity to areas west of Oahu this morning. This may allow for brief periods of MVFR ceilings and visibility. Elsewhere across the island chain, expect mainly dry conditions with partly cloudy skies and isolated showers.
This evening into tonight, southeasterly winds will back to a more easterly direction and bring a return of windward showers, especially over eastern portions of the Big Island.
AIRMET SIERRA remains in effect for Oahu and Kauai above 2500 feet due to reduced visibility from low clouds and showers.

Marine

A weakening boundary is over the western part of the state, near Kauai this early morning, and is heading west. Winds with a southerly component across the area will back toward the east over the next day or two and strengthen as high pressure builds far north and northeast of the islands. Moderate to strong trade winds will then continue through the middle of next week.
The current north swell remains elevated, though it has peaked. It will gradually lower through tonight. The High Surf Advisory was cancelled with the declining swell, but surf heights will remain near the 15-foot advisory threshold through the morning hours. No other significant northwest or north swells are likely through the middle of next week. And the Small Craft Advisory was also cancelled as combined seas have fallen below 10 feet.
Small, long-period south swells will maintain current south shore surf through Saturday. With no significant trade winds over and upstream of the state, most eastern shore surf will be from north swell wrap. However, strengthening trade winds this weekend will create rising, choppy surf along east facing shores.

HFO Watches/Warnings/Advisories

None.

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Data Courtesy of NOAA.gov