Hilo

Tonight: Occasional showers. Lows 67 to 74 near the shore to around 61 at 4000 feet. East winds up to 15 mph. Chance of rain near 100 percent.

Friday: Occasional showers. Highs 80 to 86 near the shore to 66 to 71 at 4000 feet. Northeast winds up to 15 mph increasing to 10 to 15 mph in the afternoon. Chance of rain near 100 percent.

Friday Night: Occasional showers. Lows 66 to 74 near the shore to around 60 at 4000 feet. Northeast winds 10 to 15 mph. Chance of rain near 100 percent.

Kona

Tonight: Partly cloudy. Isolated showers in the evening. Lows around 76 near the shore to 53 to 58 near 5000 feet. Light winds. Chance of rain 20 percent.

Friday: Mostly sunny in the morning, then partly sunny with scattered showers in the afternoon. Highs 86 to 92 near the shore to around 72 near 5000 feet. Light winds. Chance of rain 50 percent.

Friday Night: Partly cloudy. Isolated showers in the evening. Lows 73 to 78 near the shore to 53 to 58 near 5000 feet. Light winds. Chance of rain 20 percent.

Waimea

Tonight: Mostly cloudy. Windy. Occasional showers in the evening, then numerous showers after midnight. Lows 67 to 74 near the shore to 58 to 66 near 3000 feet. East winds up to 30 mph with gusts to 50 mph. Chance of rain 90 percent.

Friday: Breezy. Mostly cloudy with numerous showers. Highs around 82 near the shore to 70 to 81 near 3000 feet. East winds 10 to 25 mph with gusts to 45 mph. Chance of rain 70 percent.

Friday Night: Mostly cloudy. Locally breezy. Numerous showers in the evening, then scattered showers after midnight. Lows 66 to 74 near the shore to 57 to 65 near 3000 feet. East winds 10 to 20 mph. Chance of rain 70 percent.

Kohala

Tonight: Mostly cloudy. Windy. Occasional showers in the evening, then numerous showers after midnight. Lows 67 to 74 near the shore to 58 to 66 near 3000 feet. East winds up to 30 mph with gusts to 50 mph. Chance of rain 90 percent.

Friday: Breezy. Mostly cloudy with numerous showers. Highs around 82 near the shore to 70 to 81 near 3000 feet. East winds 10 to 25 mph with gusts to 45 mph. Chance of rain 70 percent.

Friday Night: Mostly cloudy. Locally breezy. Numerous showers in the evening, then scattered showers after midnight. Lows 66 to 74 near the shore to 57 to 65 near 3000 feet. East winds 10 to 20 mph. Chance of rain 70 percent.

South Big Island

Tonight: Partly cloudy. Windy. Isolated showers in the evening. Lows around 77 near the shore to around 58 near 5000 feet. East winds up to 30 mph increasing to 10 to 30 mph after midnight. Chance of rain 20 percent.

Friday: Mostly sunny. Breezy. Scattered showers in the afternoon. Highs around 89 near the shore to around 70 near 5000 feet. East winds up to 25 mph increasing to 10 to 25 mph in the afternoon. Chance of rain 50 percent.

Friday Night: Partly cloudy. Isolated showers in the evening. Lows around 77 near the shore to around 58 near 5000 feet. East winds 10 to 15 mph. Chance of rain 20 percent.

Puna

Tonight: Occasional showers. Lows 67 to 74 near the shore to around 61 at 4000 feet. East winds up to 15 mph. Chance of rain near 100 percent.

Friday: Occasional showers. Highs 80 to 86 near the shore to 66 to 71 at 4000 feet. Northeast winds up to 15 mph increasing to 10 to 15 mph in the afternoon. Chance of rain near 100 percent.

Friday Night: Occasional showers. Lows 66 to 74 near the shore to around 60 at 4000 feet. Northeast winds 10 to 15 mph. Chance of rain near 100 percent.

Waikoloa

Tonight: Partly cloudy with scattered showers. Lows around 77 near the shore to 55 to 61 above 4000 feet. Northwest winds up to 15 mph shifting to the southeast after midnight. Gusts up to 40 mph. Chance of rain 50 percent.

Friday: Mostly sunny. Breezy. Isolated showers in the morning, then scattered showers in the afternoon. Highs 86 to 92 near the shore to 68 to 74 above 4000 feet. Northeast winds up to 25 mph with gusts to 45 mph. Chance of rain 50 percent.

Friday Night: Partly cloudy. Scattered showers in the evening. Lows around 77 near the shore to 55 to 60 above 4000 feet. Northeast winds up to 10 mph. Chance of rain 50 percent.

Detailed Forecast

Synopsis

Strong high pressure far north of the state will continue to produce breezy trades into the weekend. One batch of trade wind showers will spread across mainly Maui and the Big Island tonight with a quick downpour or two possible windward. Another increase in moisture will bring enhanced showers to mostly windward and mauka locations Saturday night into Sunday. Otherwise fairly typical trade wind weather is expected.

Short term update

There have been some decent 3 hr rainfall amounts over an inch over portions of windward Big Island. Overall the forecast is on track tonight so no updates are expected.

Prev discussion

Issued at 331 PM HST Thu Jul 9 2026 Very large surface high 1035 mb or so meanders over the far NE Pac the next 10 days, keeping trades breezy with slight slackening expected by the middle of next week. One batch of enhanced showers is rolling into Maui and the BI, associated with higher PW around 1.75″ moving in…enough for a couple of quick windward and mauka downpours. Oahu should be on N fringes of this moisture convergence later tonight and Fri AM. Still another shower area progged near the islands in the ensemble means Sat night into Sun AM. Ridging persists aloft, so nothing too unusual expected with either of these. Otherwise, typical windward and mauka showers expected with PW trending near normal thru midweek next week.
However…the latest ensemble runs and current MJO phase suggest we keep an close eye on the tropics to our S and SE the over the next couple of weeks. There is more agreement in the long range than I'd like to see, that the ITCZ to the S and SE of the islands will become even more active. The subtropical jet shifts N of the islands in a week or so, anticyclonic flow builds aloft SE of the islands, and deeper tropical moisture and much- below- normal surface pressure gradually get established to our S and shift northward. Just a little tap on the shoulder to remind us that while it is quiet over the islands for the time being, we are getting farther into Hurricane Season with what is expected to be a very strong El Nino continuing to build.

Aviation

Moderate to breezy trades will persist across the Hawaiian Islands, bringing in pockets of enhanced low-level showers across predominately windward and mauka areas, occasionally spilling over into leeward areas. Expect VFR conditions to prevail across most locations, with occasional localized MVFR/IFR conditions in association with shower activity.
AIRMET Sierra is in effect for mountain obscuration above 2500 feet for windward Kauai, Oahu, Maui, and the Big Island. This is expected to persist throughout the period as shower activity continues, even if showers prove to be intermittent at times.
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

Issued at 331 PM HST Thu Jul 9 2026 Strong high pressure centered north of the state will remain nearly stationary over the forecast period driving fresh to strong trade winds across the entire coastal waters. The Small Craft Advisory (SCA) is in effect through Friday afternoon for all Hawaiian waters. Trades will remain fresh to strong through the weekend so the SCA may need to be extended but a few leeward zones might drop off.
The current small medium-period south-southwest (190-200 degrees) swell will gradually decline through Friday. A small to moderate, long- period southwest swell (220 degrees) is expected to fill in Saturday into early next week, but due to its Tasman source, could be more inconsistent than the current swell.
Surf along east-facing shores will remain rough and choppy through the forecast period as fresh to strong trades hold. A series of small, moderate- to long-period west (270 to 280 degrees) swells are expected to arrive late Friday and hold into early next week, sourced from Typhoon Bavi in the far western Pacific. Surf along north-facing shores is expected to remain flat to tiny with no significant swells forecast from the north or northwest.
Looking ahead, higher than normal high tides will be possible beginning during the latter half of this weekend. Interests immediately along the coasts in low-lying or vulnerable areas should continue to monitor forecasts for possible coastal flooding due to the King Tides from Sunday through the first half of next week.

HFO Watches/Warnings/Advisories

Small Craft Advisory until 6 PM HST Friday 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