1-3 foot
1-3 foot
4-6 foot
2-4 foot

Surface high pressure far northeast of the islands will maintain locally breezy trade winds for the next several days. A Small Craft Advisory remains in effect through Sunday afternoon for the typically windier waters adjacent to the Big Island and the islands of Maui County. The latest forecast indicates these SCA conditions will likely persist across these same areas through early next week.

The latest observations from the Barbers Point buoy near the south shore of Oahu continue to show the significant wave height is near 4 feet with a wave period of about 17 seconds, which is due to a south swell. As a result, a High Surf Advisory (HSA) remains in effect for the south facing shores of all islands. Surf may briefly drop below the advisory criteria by late this afternoon, but a new reinforcing south swell is forecast to arrive early this evening. This reinforcing swell will likely cause surf to reach the HSA threshold again starting tonight. Therefore, the HSA is now in effect for south facing shores through early Sunday morning. The south swell will gradually subside early next week. The latest model guidance continues to show another long-period south swell spreading across the state next Thursday and Friday.

Near average, short-period trade wind waves will likely maintain rough surf along east facing shores into the middle of next week. The current small northwest swell will keep a slight bump across most north facing shores of the smaller islands today, before subsiding late tonight and Sunday. The forecast models show another small northwest swell from Tuesday into Wednesday, and the potential for a slightly larger northwest swell toward the end of next week.

Hawaii Wave Height Model

Tide Predictions

Low tide at Kahului was 0.02 foot at 2:00 PM early this afternoon, rising to a high of 1.82 foot at 2:00 PM early this afternoon, then dropping to a low of 0.90 foot at 2:00 PM early this afternoon, before once again rising to a high of 1.63 foot at 2:00 PM early this afternoon.

The sunrise was at 05:42 am this morning and will set at 07:07 pm this evening. The Moon is currently 25 days old, and is in a Waning Crescent phase. The next New Moon will occur at 7:45 PM on Wednesday, June 13th.

Hawaii Wind Report

Maui Weather

°/°
Wind: n/a at 0 mph
Sunrise:
Sunset:
current observations as of 1am June 22nd, 2018

Weather Outlook for Saturday, 9th June 2018

Summary

A high pressure ridge remains north of the state while a low level trough moves westward through Oahu and Kauai this morning. Wind directions in the lower levels will remain east to southeast through this afternoon elevating VOG (Volcanic Haze) levels from the Kilauea volcano across all islands today. East to northeast winds will return by tonight pushing the VOG away from most of the population centers. Weather-wise expect scattered showers favoring windward slopes with isolated showers possible elsewhere.

Detailed Discussion

Heavy showers developed overnight along the eastern slopes of the Big Island and along the Ko’olau mountain range on Oahu. Flood advisories were issued for both areas with elevated stream levels reported on Oahu stream gauges. The showers over the Big Island were likely driven by unstable clouds moving into the eastern slopes of Mauna Kea and Mauna Loa with additional lift from heating caused by lava flowing into the ocean near Kapoho. The enhanced showers on Oahu were likely caused by a convergence plume downstream of Moloka`i moving up over the Ko’olau mountains in an unstable boundary layer. There were no reports of flooding overnight.

The large scale weather pattern continues to show a surface high pressure center in the northeast Pacific with a ridge extending into the Central Pacific along 30 deg north latitude. A low level trough continues to drift across Oahu and Kauai this morning causing a southeasterly shift in the wind directions aloft through this afternoon. This trough will continue to drift westward today away from the islands. An upper level trough, also known as the TUTT, remains north of the state with a few upper level lows lingering over the Central Pacific through the forecast period.

The high pressure ridge will build in across the state later this afternoon and wind directions will then shift to a more east to northeast direction from this evening through Sunday morning. Drier air and more stable air aloft will filter in from the northeast keeping chances for showers to a minimum with isolated to scattered shower activity favoring the windward slopes of each island through the rest of the Kamehameha Holiday weekend. VOG will also be driven away from the smaller islands later tonight with VOG impacts limited to the southern and western portions of the Big Island.

For the Big Island volcanic particulates…Expect trace volcanic ash and Pele’s hair emissions to drift west and northwest through the afternoon with the east to southeast wind directions pushing particulate impacts as far north as the saddle region and south Hilo. As winds shift to more northeastly direction later tonight the volcanic emissions will drift towards the southwest with impacts mainly near the vicinity of the volcano and across the Kau District of the Big Island.

For the extended forecast, the high pressure ridge will remain in place far to the north of the islands through Wednesday with trade winds and passing showers favoring windward slopes of each island. Long range model guidance continues to show a series of frontal systems moving across the North Pacific weakening this ridge by next week Thursday and Friday. The weakening of the ridge will potentially decrease the trade wind flow for the second half of next week. More details later as the time period gets closer.

Central Valley (Kahului, Spreckelsville):

Mostly clear. Haze. Lows 68 to 73. Northeast winds 10 to 15 mph.

Leeward West (Lahaina, Ka`anapali):

HIGH SURF ADVISORY IN EFFECT UNTIL 6 AM HST SUNDAY. Sunny. Haze through the day. Isolated showers in the afternoon. Highs 78 to 86. East winds 10 to 15 mph. Chance of rain 20 percent.

Windward West (Wailuku, Waiehu):

Breezy. Mostly cloudy with scattered showers. Haze. Lows 59 to 74. East winds 15 to 25 mph shifting to the northeast 10 to 15 mph early in the morning. Chance of rain 50 percent.

Windard Haleakala (Hana, Haiku, Makawao):

HIGH SURF ADVISORY IN EFFECT UNTIL 6 AM HST SUNDAY. Mostly cloudy. Breezy. Occasional showers in the morning, then scattered showers in the afternoon. Haze through the day. Highs around 82 at the shore to around 73 at 5000 feet. East winds 10 to 25 mph. Gusts up to 40 mph early in the morning. Chance of rain 90 percent.

Leeward Haleakala (Kihei, Wailea, Makena):

HIGH SURF ADVISORY IN EFFECT UNTIL 6 AM HST SUNDAY. Sunny and haze. Highs around 90 at the shore to around 79 upcountry. Southwest winds up to 10 mph. Gusts up to 40 mph decreasing to 30 mph in the late morning and afternoon.

Haleakala Summit

Partly cloudy. Isolated showers in the evening, then scattered showers after midnight. Lows around 45 at the visitor center to around 43 at the summit. East winds 10 to 15 mph decreasing to up to 10 mph early in the morning. Chance of rain 50 percent.

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