Hilo

Tonight: Mostly cloudy. Scattered showers in the evening, then numerous showers after midnight. Lows 66 to 72 near the shore to 54 to 59 at 4000 feet. North winds up to 10 mph in the evening becoming light. Chance of rain 70 percent.

Wednesday: Partly sunny with scattered showers in the morning, then mostly sunny with isolated showers in the afternoon. Highs 80 to 86 near the shore to around 68 at 4000 feet. East winds up to 10 mph. Chance of rain 50 percent.

Wednesday Night: Mostly cloudy. Scattered showers in the evening, then numerous showers after midnight. Lows 67 to 73 near the shore to 54 to 59 at 4000 feet. Southeast winds up to 10 mph in the evening becoming light. Chance of rain 70 percent.

Kona

Tonight: Mostly cloudy with scattered showers in the evening, then mostly clear after midnight. Lows 71 to 76 near the shore to 50 to 55 near 5000 feet. Light winds. Chance of rain 40 percent.

Wednesday: Sunny in the morning, then partly sunny with scattered showers in the afternoon. Highs 83 to 88 near the shore to around 67 near 5000 feet. West winds up to 10 mph. Chance of rain 50 percent.

Wednesday Night: Partly cloudy. Isolated showers in the evening. Lows 72 to 77 near the shore to 50 to 55 near 5000 feet. Light winds. Chance of rain 20 percent.

Waimea

Tonight: Mostly cloudy in the evening then becoming partly cloudy. Scattered showers. Lows 65 to 73 near the shore to 59 to 66 near 3000 feet. East winds up to 10 mph. Chance of rain 50 percent.

Wednesday: Mostly sunny. Isolated showers in the morning, then scattered showers in the afternoon. Highs around 82 near the shore to 70 to 79 near 3000 feet. East winds up to 15 mph. Chance of rain 40 percent.

Wednesday Night: Mostly cloudy in the evening then becoming partly cloudy. Scattered showers. Lows 66 to 74 near the shore to 60 to 66 near 3000 feet. East winds up to 15 mph. Chance of rain 50 percent.

Kohala

Tonight: Mostly cloudy in the evening then becoming partly cloudy. Scattered showers. Lows 65 to 73 near the shore to 59 to 66 near 3000 feet. East winds up to 10 mph. Chance of rain 50 percent.

Wednesday: Mostly sunny. Isolated showers in the morning, then scattered showers in the afternoon. Highs around 82 near the shore to 70 to 79 near 3000 feet. East winds up to 15 mph. Chance of rain 40 percent.

Wednesday Night: Mostly cloudy in the evening then becoming partly cloudy. Scattered showers. Lows 66 to 74 near the shore to 60 to 66 near 3000 feet. East winds up to 15 mph. Chance of rain 50 percent.

South Big Island

Tonight: Partly cloudy. Isolated showers in the evening. Lows around 75 near the shore to around 56 near 5000 feet. East winds up to 15 mph. Chance of rain 20 percent.

Wednesday: Sunny and breezy. Isolated showers in the afternoon. Highs around 86 near the shore to around 66 near 5000 feet. East winds up to 20 mph. Chance of rain 20 percent.

Wednesday Night: Mostly clear. Isolated showers in the evening. Lows around 76 near the shore to around 57 near 5000 feet. East winds 10 to 15 mph. Chance of rain 20 percent.

Puna

Tonight: Mostly cloudy. Scattered showers in the evening, then numerous showers after midnight. Lows 66 to 72 near the shore to 54 to 59 at 4000 feet. North winds up to 10 mph in the evening becoming light. Chance of rain 70 percent.

Wednesday: Partly sunny with scattered showers in the morning, then mostly sunny with isolated showers in the afternoon. Highs 80 to 86 near the shore to around 68 at 4000 feet. East winds up to 10 mph. Chance of rain 50 percent.

Wednesday Night: Mostly cloudy. Scattered showers in the evening, then numerous showers after midnight. Lows 67 to 73 near the shore to 54 to 59 at 4000 feet. Southeast winds up to 10 mph in the evening becoming light. Chance of rain 70 percent.

Waikoloa

Tonight: Partly cloudy. Isolated showers in the evening. Lows around 76 near the shore to 53 to 58 above 4000 feet. Northeast winds up to 10 mph in the evening becoming light. Chance of rain 20 percent.

Wednesday: Sunny in the morning, then partly sunny with scattered showers in the afternoon. Highs 84 to 89 near the shore to 65 to 72 above 4000 feet. North winds up to 10 mph. Chance of rain 50 percent.

Wednesday Night: Partly cloudy. Isolated showers in the evening. Lows around 76 near the shore to 53 to 58 above 4000 feet. Northeast winds up to 10 mph in the evening becoming light. Chance of rain 20 percent.

Detailed Forecast

Synopsis

Moderate trades deliver showers windward and mauka through the weekend.

Short term update

Moderate trades delivering scattered to numerous showers windward and mauka this evening. Minor adjustment to the inherited forecast to tweak pops upward to more closely match recent radar trends. Otherwise no adjustments necessary.

Prev discussion

Issued at 357 PM HST Tue Jul 14 2026 Radar and satellite imagery show that shower coverage has gradually decreased this afternoon, with remaining activity continuing to favor the western half of the state. Upstream moisture suggests a slight uptick in shower coverage across windward and mauka areas statewide overnight.
High pressure far north of the area will be gradually nudged eastward through the weekend as a series of lows pass through the far northeast Pacific. Another high will then build in behind it from the northwest early next week. The progression of these features, along with two areas of potential tropical development to the south and southwest of the state, will bring subtle ebbs and flows in the local pressure gradient, consequently altering trade wind speeds through the period. Wind speeds will be moderate to locally breezy over the next couple of days, strengthen to become breezy through the weekend, and then potentially weaken slightly once again early next week. The two areas south and southwest of the state being watched for potential tropical cyclone development are not expected to have any direct impacts on Hawaii at this time.
Batches of moisture will filter in on the trades, bringing periodic upticks in windward and mauka showers through the period. While most shower activity will remain focused over windward and mauka areas during the overnight to early morning hours, short- term guidance suggests that the low-level flow will temporarily veer slightly south of east tomorrow. This will increase the potential for isolated sea breeze showers over leeward areas across the state, and may allow convergent boundaries downwind of Molokai to bring showers to leeward Oahu tomorrow afternoon.

Aviation

Moderate trades expected through the forecast period. Low cigs and SHRA should primarily impact windward and mauka locations. MVFR conds possible in SHRA, otherwise VFR prevails.
AIRMET Sierra is in effect for mtn obsc for Kauai, Oahu Maui and the Big Island. Conds should improve in the mid morning hours.

Marine

Issued at 357 PM HST Tue Jul 14 2026 No significant changes to the forecast with the afternoon package. The Coastal Flood statement remains posted for higher than normal tides since we are in the midsts of the afternoon peak tides. Anticipate cancelling that statement by 6 pm today as the high tides begins to subside.
High pressure far north of the islands will maintain a trade wind pattern, however as the high has weakened and lifted away from the islands, trade winds are not quite as strong. Winds across the coastal waters remain below Small Craft Advisory levels. Winds could rebound during the second half of the week as the high sinks southward, tightening the pressure gradient over the islands.
The current small, long-period southwest swell will continue to gradually decline through the middle of the week. A series of overlapping small south and southwest swells will maintain south shore surf, with a larger south swell expected early next week.
Surf along east-facing shores will steadily decline through Wednesday as the trade winds ease. Surf will then hold steady at slightly below seasonal averages along east facing shores through the weekend.
A series of small, long to medium period west to west-northwest swells generated by former Super Typhoon Bavi will be possible throughout the rest of the week. Otherwise, no significant north or northwest swells are expected.
Coastal flooding remains possible this afternoon with the peak monthly high tides, combined with water levels running slightly higher than predicted. The Coastal Flood Statement will be cancelled later this afternoon after the peak of the high tide.

HFO Watches/Warnings/Advisories

None.

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