Photo Credit: Brendan Stephen

West Kaua’i

Today: Sunny. Highs around 91 near the shore to around 78 above 3000 feet. East winds up to 15 mph.

Tonight: Mostly clear. Slight chance of showers in the evening, then chance of showers after midnight. Lows around 74 near the shore to around 63 above 3000 feet. Northeast winds around 10 mph. Chance of rain 50 percent.

Saturday: Sunny. A 50 percent chance of showers in the morning. Highs around 91 near the shore to around 79 above 3000 feet. Northeast winds 10 to 15 mph.

South Kaua’i

Today: Mostly sunny. Breezy. A 20 percent chance of showers in the morning. Highs 83 to 92. East winds 10 to 20 mph.

Tonight: Mostly cloudy with a 50 percent chance of showers. Lows around 74. Northeast winds 10 to 15 mph.

Saturday: Mostly cloudy with showers likely in the morning, then sunny in the afternoon. Highs 82 to 90. Northeast winds around 15 mph. Chance of rain 70 percent.

Kaua’i Mountains

Today: Partly sunny with chance of showers in the morning, then mostly sunny with slight chance of showers in the afternoon. Highs 76 to 89 in the valleys to around 69 above 4000 feet. East winds up to 15 mph. Chance of rain 50 percent.

Tonight: Mostly cloudy. Chance of showers in the evening, then showers likely after midnight. Lows 66 to 73 in the valleys to around 60 above 4000 feet. East winds 10 to 15 mph. Chance of rain 60 percent.

Saturday: Mostly cloudy with showers likely in the morning, then mostly sunny with slight chance of showers in the afternoon. Highs 75 to 88 in the valleys to around 68 above 4000 feet. East winds 10 to 15 mph. Chance of rain 70 percent.

North Kaua’i

Today: Mostly sunny with a 20 percent chance of showers. Highs 79 to 91. East winds up to 15 mph.

Tonight: Partly cloudy in the evening then becoming mostly cloudy. A 50 percent chance of showers. Lows 67 to 75. East winds 10 to 15 mph.

Saturday: Partly sunny with chance of showers in the morning, then sunny with slight chance of showers in the afternoon. Highs 78 to 91. East winds 10 to 15 mph. Chance of rain 50 percent.

East Kaua’i

Today: Partly sunny in the morning then becoming mostly sunny. A 20 percent chance of showers. Highs 76 to 89. East winds 10 to 15 mph.

Tonight: Mostly cloudy with a 50 percent chance of showers. Lows 67 to 77. Northeast winds 10 to 15 mph.

Saturday: Mostly cloudy with showers likely in the morning, then mostly sunny with slight chance of showers in the afternoon. Highs 75 to 88. East winds 10 to 15 mph. Chance of rain 70 percent.

Detailed Forecast

Synopsis

Gradually strengthening trade winds will become locally breezy by the weekend, delivering just a few showers, mainly to windward areas.

Discussion

Persistent troughing far N of the islands will continue to gradually diminish, allowing a pair of surface high pressure centers to consolidate over the weekend. End result will be strengthening trade winds, becoming locally breezy later today into Saturday, then persisting into the middle of next week. Atmospheric stability will remain high, so any showers arriving on the trades will be brief, and favor windward areas during nights and mornings. Moisture associated with a weak tropical disturbance passing far S of the islands may bring increased showers Sunday night and Monday, mainly to the Big Island.

Aviation

Moderate to locally breezy trades expected through the weekend. Low cigs and SHRA should be confined to windward and mauka locations. Brief MVFR conds can be expected in SHRA. VFR conds should generally prevail.
No AIRMETs currently in effect.

Marine

Moderate to locally strong winds will fill in today then persist into the weekend as a broad high develops over much of the central and eastern half of the Pacific. A Small Craft Advisory (SCA) for the typically windy waters around Maui County and the Big Island has been issued through the weekend. The high pressure will meander just north-northeast of the state through the first half of next week that may keep SCA conditions in place through this time.
Tiny surf along north facing shores will linger through today as a short period north swell fades. Mostly flat conditions will return tonight then hold through the first half of next week. Surf along east facing shores will gradually become rough and choppy today. Near seasonal average surf will return for east facing shores over the weekend and persist through the first half of next week as trades build locally and upstream. A mix of background southwest and southeast swells will produce small surf for south facing shores over the next few days. No signs of any forerunners from a new small, long period south-southwest swell at the offshore buoys early this morning. Thus, have delayed the onset to later this afternoon and evening. This new swell should refresh some small surf along south facing shores over the weekend with a gradual downtrend early next week.

HFO Watches/Warnings/Advisories

None.

Data Courtesy of NOAA.gov