Hilo

Tonight: Partly cloudy in the evening then becoming mostly cloudy. Scattered showers. Lows 64 to 73 near the shore to around 57 at 4000 feet. North winds up to 15 mph. Chance of rain 50 percent.

Monday: Mostly cloudy. Numerous showers in the morning, then scattered showers in the afternoon. Highs 78 to 85 near the shore to around 66 at 4000 feet. North winds up to 15 mph shifting to the northeast in the afternoon. Chance of rain 70 percent.

Monday Night: Mostly cloudy. Numerous showers in the evening, then frequent showers after midnight. Lows 64 to 72 near the shore to 54 to 59 at 4000 feet. North winds up to 15 mph. Chance of rain 80 percent.

Kona

Tonight: Mostly clear with isolated showers. Lows 67 to 75 near the shore to 51 to 56 near 5000 feet. Light winds. Chance of rain 20 percent.

Monday: Mostly sunny. Scattered showers in the afternoon. Highs 83 to 89 near the shore to around 68 near 5000 feet. Light winds. Chance of rain 40 percent.

Monday Night: Mostly clear with isolated showers. Lows 66 to 74 near the shore to 50 to 55 near 5000 feet. Light winds. Chance of rain 20 percent.

Waimea

Tonight: Breezy. Partly cloudy with isolated showers. Lows 64 to 72 near the shore to 58 to 65 near 3000 feet. East winds 10 to 20 mph. Chance of rain 20 percent.

Monday: Breezy. Partly sunny with scattered showers. Highs around 80 near the shore to 67 to 79 near 3000 feet. East winds 10 to 20 mph. Chance of rain 50 percent.

Monday Night: Breezy. Mostly cloudy with scattered showers. Lows 64 to 72 near the shore to 58 to 65 near 3000 feet. East winds 10 to 20 mph. Chance of rain 50 percent.

Kohala

Tonight: Breezy. Partly cloudy with isolated showers. Lows 64 to 72 near the shore to 58 to 65 near 3000 feet. East winds 10 to 20 mph. Chance of rain 20 percent.

Monday: Breezy. Partly sunny with scattered showers. Highs around 80 near the shore to 67 to 79 near 3000 feet. East winds 10 to 20 mph. Chance of rain 50 percent.

Monday Night: Breezy. Mostly cloudy with scattered showers. Lows 64 to 72 near the shore to 58 to 65 near 3000 feet. East winds 10 to 20 mph. Chance of rain 50 percent.

South Big Island

Tonight: Mostly clear. Breezy. Lows around 75 near the shore to around 57 near 5000 feet. Northeast winds up to 20 mph decreasing to up to 10 mph after midnight.

Monday: Sunny and breezy. Isolated showers in the afternoon. Highs around 87 near the shore to around 67 near 5000 feet. East winds up to 20 mph. Chance of rain 20 percent.

Monday Night: Mostly clear. Isolated showers in the evening. Lows around 75 near the shore to around 57 near 5000 feet. Northeast winds up to 15 mph increasing to 10 to 15 mph after midnight. Chance of rain 20 percent.

Puna

Tonight: Partly cloudy in the evening then becoming mostly cloudy. Scattered showers. Lows 64 to 73 near the shore to around 57 at 4000 feet. North winds up to 15 mph. Chance of rain 50 percent.

Monday: Mostly cloudy. Numerous showers in the morning, then scattered showers in the afternoon. Highs 78 to 85 near the shore to around 66 at 4000 feet. North winds up to 15 mph shifting to the northeast in the afternoon. Chance of rain 70 percent.

Monday Night: Mostly cloudy. Numerous showers in the evening, then frequent showers after midnight. Lows 64 to 72 near the shore to 54 to 59 at 4000 feet. North winds up to 15 mph. Chance of rain 80 percent.

Waikoloa

Tonight: Mostly clear. Breezy. Lows 68 to 75 near the shore to 52 to 58 above 4000 feet. East winds up to 20 mph.

Monday: Sunny and breezy. Highs 84 to 90 near the shore to 65 to 72 above 4000 feet. Northeast winds up to 25 mph.

Monday Night: Mostly clear. Isolated showers in the evening. Lows 67 to 74 near the shore to 51 to 57 above 4000 feet. Northeast winds up to 15 mph. Chance of rain 20 percent.

Detailed Forecast

Synopsis

A ridge of high pressure will remain anchored in place north of the Hawaiian Islands for the foreseeable future. Easterly trade winds will continue to blow across the region through the end of this week. Shower activity will remain limited with brief increasing trends on Tuesday, and stronger trends from Thursday through Friday as a weak easterly wave moves from east to west across the state. Any showers that develop in this trade wind pattern will favor windward mountain slopes of each island during the overnight to early morning hours.

Short term update

High pressure centered far north of Hawaii will keep moderate to locally breezy trade winds for the upcoming week. Brief periods of rain showers will affect windward and mountain areas primarily during the overnight and early morning hours. Increased showers are possible Tuesday into Wednesday with a weak trough tracking east to west through the islands. A stronger trough may bring another increase in shower activity later this week.

Prev discussion

Issued at 321 PM HST Sun Jul 5 2026 The satellite imagery this morning shows a weak easterly wave near 150W longitude riding the easterly trade winds towards the Big Island. This weak trough will bring a brief period of increasing shower trends to the state on Tuesday. Another stronger trough currently near 130W longitude, loosely associated with the remnants of former tropical cyclone Douglas, will ride the trade winds into Hawaii from Thursday to Friday producing another round of showers spreading east to west across the state. Rainfall amounts with this first system will be limited due to the stable ridge aloft, the second trough will bring significant increases to humidity levels and the potential for higher rainfall amounts favoring island mountain slopes.
Otherwise, easterly trade winds will continue through the end of this week as the subtropical ridge remains locked in place north of Hawaii. Subtle day to day changes to the trade wind speeds should be expected. Mostly stable weather conditions are forecast for the next seven days with slight increases in shower activity on Tuesday, and stronger rainfall trends from Thursday through Friday as two easterly waves drift through the island chain. Rainfall amounts over the next seven days will remain limited due to large scale stability, with the highest amounts forecast during the Thursday to Friday time period.

Aviation

Moderate to locally breezy trades will continue through the period. Low clouds and scattered showers will continue to impact windward and mountain areas, with some spillover into leeward sites. VFR conditions are broadly expected, with localized MVFR mainly for windward/mauka sites.
AIRMET Tango remains in effect for moderate low level turbulence over and downwind of terrain for all islands. This AIRMET will likely continue through the next several days.

Marine

High pressure maintains fresh to locally strong trades through the week. A Small Craft Advisory is in effect for all local waters.
A moderate, long period, SSW swell will maintain through Monday and help boost surf along S shores to just shy of the Advisory levels. Energy associated with this swell is spread across the spectrum and not necessarily focused in the long period bins. This increases confidence that an Advisory will not be needed.
Surf along E facing shores will remain choppy through the week as fresh to locally strong trades hold. Surf along N shores remains flat to tiny.

HFO Watches/Warnings/Advisories

Small Craft Advisory until 6 PM HST Monday for Alenuihaha Channel, Big Island Leeward Waters, Big Island Southeast Waters, Big Island Windward Waters, Kaiwi Channel, Kauai Channel, Kauai Leeward Waters, Kauai Northwest Waters, Kauai Windward Waters, Maalaea Bay, Maui County Leeward Waters, Maui County Windward Waters, Oahu Leeward Waters, Oahu Windward Waters, Pailolo Channel.

Big Island Now Weather is brought to you by Blue Hawaiian Helicopters.

Check out their Big Island Helicopter Tours today!

Data Courtesy of NOAA.gov