Hilo

Tonight: Mostly cloudy with scattered showers. Lows 55 to 65 near the shore to 46 to 52 at 4000 feet. North winds up to 15 mph. Chance of rain 50 percent.

Wednesday: Mostly sunny. Breezy. Scattered showers in the morning, then isolated showers in the afternoon. Highs around 76 near the shore to 58 to 64 at 4000 feet. North winds up to 20 mph. Chance of rain 40 percent.

Wednesday Night: Partly cloudy in the evening then becoming mostly cloudy. Breezy. Scattered showers. Lows 56 to 66 near the shore to 47 to 53 at 4000 feet. Northwest winds up to 20 mph. Chance of rain 50 percent.

Kona

Tonight: Haze in the evening. Mostly cloudy with isolated showers in the evening, then mostly clear after midnight. Lows around 68 near the shore to 43 to 49 near 5000 feet. Light winds. Chance of rain 20 percent.

Wednesday: Sunny. Highs 78 to 84 near the shore to around 63 near 5000 feet. West winds up to 10 mph.

Wednesday Night: Mostly clear. Lows around 68 near the shore to 45 to 50 near 5000 feet. Light winds.

Waimea

Tonight: Breezy. Mostly cloudy with scattered showers in the evening, then partly cloudy with isolated showers after midnight. Lows 56 to 66 near the shore to 49 to 56 near 3000 feet. East winds 10 to 25 mph decreasing to up to 20 mph after midnight. Chance of rain 50 percent.

Wednesday: Mostly sunny. Breezy. Scattered showers in the morning, then isolated showers in the afternoon. Highs around 75 near the shore to 63 to 72 near 3000 feet. East winds up to 25 mph increasing to 10 to 25 mph in the afternoon. Chance of rain 30 percent.

Wednesday Night: Breezy. Partly cloudy with isolated showers. Lows 57 to 67 near the shore to 50 to 58 near 3000 feet. East winds 10 to 20 mph. Chance of rain 20 percent.

Kohala

Tonight: Breezy. Mostly cloudy with scattered showers in the evening, then partly cloudy with isolated showers after midnight. Lows 56 to 66 near the shore to 49 to 56 near 3000 feet. East winds 10 to 25 mph decreasing to up to 20 mph after midnight. Chance of rain 50 percent.

Wednesday: Mostly sunny. Breezy. Scattered showers in the morning, then isolated showers in the afternoon. Highs around 75 near the shore to 63 to 72 near 3000 feet. East winds up to 25 mph increasing to 10 to 25 mph in the afternoon. Chance of rain 30 percent.

Wednesday Night: Breezy. Partly cloudy with isolated showers. Lows 57 to 67 near the shore to 50 to 58 near 3000 feet. East winds 10 to 20 mph. Chance of rain 20 percent.

South Big Island

Tonight: Partly cloudy in the evening then becoming clear. Breezy. Haze in the evening. Lows around 70 near the shore to around 49 near 5000 feet. Northeast winds up to 20 mph.

Wednesday: Sunny and breezy. Highs around 81 near the shore to around 61 near 5000 feet. East winds up to 20 mph.

Wednesday Night: Mostly clear. Lows around 71 near the shore to around 51 near 5000 feet. North winds up to 15 mph.

Puna

Tonight: Mostly cloudy with scattered showers. Lows 55 to 65 near the shore to 46 to 52 at 4000 feet. North winds up to 15 mph. Chance of rain 50 percent.

Wednesday: Mostly sunny. Breezy. Scattered showers in the morning, then isolated showers in the afternoon. Highs around 76 near the shore to 58 to 64 at 4000 feet. North winds up to 20 mph. Chance of rain 40 percent.

Wednesday Night: Partly cloudy in the evening then becoming mostly cloudy. Breezy. Scattered showers. Lows 56 to 66 near the shore to 47 to 53 at 4000 feet. Northwest winds up to 20 mph. Chance of rain 50 percent.

Waikoloa

Tonight: Mostly clear. Breezy. Lows 65 to 70 near the shore to 44 to 50 above 4000 feet. East winds up to 25 mph.

Wednesday: Sunny and windy. Highs 78 to 84 near the shore to 62 to 67 above 4000 feet. Northeast winds up to 30 mph.

Wednesday Night: Mostly clear. Breezy. Lows around 68 near the shore to 47 to 52 above 4000 feet. East winds up to 25 mph.

Detailed Forecast

Synopsis

Moderate to locally breezy trades will taper off Wednesday and Thursday becoming light and variable by this weekend. Shower activity will be kept to a minimum with just a few windward and mauka clouds and showers through the end of the week.

Short term update

Issued at 815 PM HST Tue Mar 31 2026
The latest forecast remains on track, therefore requires no amendments this evening. Light showers persist across the Hawaiian Islands with many locations limited to a few hundredths of an inch, if any. Otherwise, some cloud build up across the state, namely along windward areas in association with trades activity. The highlight of the evening is that trades are expected to begin easing in strength as the surface high weakens. This should be well represented in this morning's forecast and discussion.

Prev discussion

A stationary upper low persists northeast of the state. At the surface, a 1028 mb surface high is centered far north of Hawaii driving fresh to locally strong trade winds across the area. Moisture levels are below average, with precipitable waters running around 0.9 inches, so while some instability from the upper low and orographic lifting will bring a few windward showers tonight, rainfall amounts will be limited by the moisture levels. Expect another cool night lows in the low to mid 60s and dew points in the upper 50s.
Looking ahead, trades will begin to ease Wednesday into Thursday as the surface high weakens and shifts eastward with a surface trough developing east of Hawaii. This feature will weaken the trade wind flow to moderate over the islands through the rest of the week. Rainfall will be limited to occasional small batches of moisture moving in from the east by the trades.
A front will approach from the west during the first half of next week. Winds will weaken, shift southeasterly, then south, while a pre-frontal convergence band drags tropical moisture up over the islands. Still significant model differences in the long-range GFS and ECMWF for the synoptic setup, but something to watch out for mid to late next week.

Aviation

Issued at 815 PM HST Tue Mar 31 2026
Moderate to locally breezy trade winds will continue into tonight. Winds will slightly weaken tomorrow. Isolated showers are possible tonight along windward and mauka areas which may lower ceilings and visibilities to MVFR at times. Otherwise, VFR conditions will prevail.
No AIRMET's are currently in effect.

Marine

A 1030 mb high pressure north of Hawaii will elongate and shift eastward through the week, causing trade winds to gradually diminish. The Small Craft Advisory for fresh to locally strong trade winds remains in effect across all Hawaiian waters through Wednesday morning. By that point, a weakening pressure gradient means that strong trade winds are expected to be limited to favored channels only. Winds become moderate to fresh northeasterly for the majority of the waters by this weekend.
Moderate north and east-facing shore surf continues to be generated by a short period north-northeast (020 degree) swell which will gradually diminish tonight and Wednesday as it veers northeast. Shores better exposed to this NNE swell will experience decent wind wave chop generated by solid moderate trades.
Surf along west-facing shores will remain dominated by wrap around from the north-northeasterly swell and will gradually diminish in kind through the week. The next small, medium-period northwest and west-northwest swells arrive this weekend to bring a small bump in surf for west-facing shores. Along south-facing shores, expect continued impulses to sustain small surf through the week.

HFO Watches/Warnings/Advisories

Small Craft Advisory until 6 AM HST Wednesday 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.

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Data Courtesy of NOAA.gov