Tonight: Mostly clear. Isolated showers in the evening. Lows 66 to 73. East winds up to 15 mph increasing to 10 to 15 mph after midnight. Chance of rain 20 percent.

Saturday: Mostly sunny in the morning then becoming mostly cloudy. Highs around 82. East winds up to 15 mph.

Saturday Night: Mostly cloudy with isolated showers. Lows 67 to 74. East winds up to 15 mph. Chance of rain 20 percent.

Tonight: Mostly clear. Lows 65 to 74. North winds up to 15 mph.

Saturday: Mostly sunny in the morning then becoming mostly cloudy. Highs around 88. North winds up to 15 mph increasing to 10 to 15 mph in the afternoon.

Saturday Night: Mostly cloudy. Lows 66 to 75. North winds up to 15 mph.

Tonight: Partly cloudy with isolated showers. Lows around 70 near the shore to around 50 near 5000 feet. East winds up to 15 mph. Chance of rain 20 percent.

Saturday: Mostly sunny with isolated showers in the morning, then mostly cloudy with scattered showers in the afternoon. Highs 78 to 84 near the shore to around 66 near 5000 feet. East winds up to 15 mph. Chance of rain 50 percent.

Saturday Night: Mostly cloudy with scattered showers. Lows around 70 near the shore to around 50 near 5000 feet. East winds up to 15 mph. Chance of rain 50 percent.

Tonight: Mostly clear. Lows 65 to 70. Northeast winds up to 15 mph.

Saturday: Mostly sunny in the morning then becoming mostly cloudy. Highs 81 to 88. Northeast winds 10 to 15 mph.

Saturday Night: Mostly cloudy. Lows around 69. Northeast winds up to 15 mph.

Tonight: Partly cloudy. Scattered showers in the evening. Lows around 45 at the visitor center to around 48 at the summit. Light winds becoming east up to 10 mph after midnight. Chance of rain 40 percent.

Saturday: Partly sunny with isolated showers. Highs around 61 at the visitor center to around 69 at the summit. East winds up to 10 mph. Chance of rain 20 percent.

Saturday Night: Mostly cloudy with isolated showers. Lows 42 to 53. East winds up to 10 mph. Chance of rain 20 percent.

Tonight: Partly cloudy with isolated showers. Lows around 70 near the shore to around 50 near 5000 feet. East winds up to 15 mph. Chance of rain 20 percent.

Saturday: Mostly sunny with isolated showers in the morning, then mostly cloudy with scattered showers in the afternoon. Highs 78 to 84 near the shore to around 66 near 5000 feet. East winds up to 15 mph. Chance of rain 50 percent.

Saturday Night: Mostly cloudy with scattered showers. Lows around 70 near the shore to around 50 near 5000 feet. East winds up to 15 mph. Chance of rain 50 percent.

Tonight: Partly cloudy. Isolated showers in the evening. Lows 61 to 66. Northeast winds up to 15 mph increasing to 10 to 15 mph after midnight. Chance of rain 20 percent.

Saturday: Partly sunny. Isolated showers in the afternoon. Highs 71 to 80. Northeast winds 10 to 15 mph. Chance of rain 20 percent.

Saturday Night: Mostly cloudy. Isolated showers in the evening. Lows 62 to 67. Northeast winds up to 15 mph. Chance of rain 20 percent.

Tonight: Partly cloudy. Isolated showers in the evening. Lows 58 to 72. Northeast winds 10 to 15 mph. Chance of rain 20 percent.

Saturday: Mostly sunny in the morning then becoming mostly cloudy. Highs 71 to 89. Northeast winds 10 to 15 mph.

Saturday Night: Mostly cloudy. Isolated showers after midnight. Lows 58 to 72. Northeast winds 10 to 15 mph. Chance of rain 20 percent.

Trade winds will ease over the weekend as the high pressure system to the northeast weakens. With a weak upper low passing just north of the state, instability should contribute to the development of windward showers overnight and a few leeward and interior sea breeze showers in the afternoons, as well. More stable conditions with drier trends will return next week as high pressure builds in over the region and trade winds will strengthen to become moderate to locally breezy by midweek.

This afternoon's radar and satellite imagery show a few clouds and showers moving into windward and mauka areas on the moderate trades, and building over leeward and interior areas, thanks mostly to sea breeze activity. This hybrid trade wind/sea breeze pattern will persist through the weekend as an Aleutian low pressure system weakens the high to the far northeast of the state, and hence, keeps the trade wind speeds on the lighter side locally. Aloft, a weak upper level low can be seen passing just north of the state on water vapor imagery this afternoon. General upper level troughing will remain in the vicinity through the weekend, supporting brief windward and sea breeze shower development as batches of moisture pass through.
Heading into next week, we'll transition to a more stable, slightly drier trade wind pattern as ridging builds in aloft and drier air filters in at the lower levels. High pressure will gradually build at the surface and become more established northeast of the state through the week, gradually strengthening the trade wind speeds to locally breezy levels by mid to late week. Brief showers will favor windward and mauka areas, especially during the overnight and early morning periods, and sea breeze induced leeward and interior showers will become less common as the week progresses due to the strengthening trades.

High pressure to the northeast of the area will keep moderate trade winds in place through the weekend. Trade winds could weaken slightly over the weekend which could give way to localized land and sea breezes. A pocket of dry air moving through the region this afternoon and tonight should limit shower activity and keep them isolated over windward and mountain areas through the forecast period. Overall VFR conditions will prevail.
No AIRMETs are in effect and none are expected over the next 24 hours.

High pressure to the far northeast will slowly weaken, maintaining gentle to locally fresh trade winds through the weekend. By early next week, high pressure looks to rebuild north of the islands as a surface trough develops west of the waters, potentially veering trade winds to the east to east southeast by the middle of next week.
Surf along south facing shores have begun to build slowly today as long period energy from the south-southwest trickles in this afternoon. Due to the observations in Samoa from the same swell outperforming the model guidance, surf heights are expected to peak through the day on Saturday at High Surf Advisory levels and hold through the day Sunday before declining into early next week. A High Surf Advisory has been issued for all south facing shores starting Saturday morning through 6 AM HST Sunday.
East shore surf will remain moderate as the northeast swell slowly declines through the weekend. Surf along north facing shores will remain tiny to small through the forecast period, except for select areas that may be exposed to the northeast swell tonight into Saturday.

High Surf Advisory from 6 AM Saturday to 6 AM HST Sunday for Niihau, Kauai Leeward, Waianae Coast, Kahoolawe, Maui Leeward West, Kona, Kauai South, East Honolulu, Honolulu Metro, Ewa Plain, Molokai Leeward South, Lanai Leeward, Lanai South, Maui Central Valley South, South Maui/Upcountry, South Haleakala, Big Island South, Big Island Southeast.

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Data Courtesy of NOAA.gov