4-6 foot
2-4 foot
4-7 foot
2-4 foot

The National Weather Service has issued a High Surf Advisory in effect through 6am Sunday morning for Hawai`i’s south facing shores due to a long period south swell peaking Saturday. Latest buoy observations indicate that this long period south swell is running slightly above wave watch guidance. This is expected to result in advisory level surf along south facing shores Saturday overnight into Sunday. This swell will then slowly subside through early next week. A relatively short-period north-northwest swell is expected to build Saturday as well. This swell will persist into the upcoming week as the direction gradually shifts from the north, due to a persistent but relatively weak surface low to the distant north-northeast. Peak surf heights along north facing shores are expected to remain below advisory levels. High pressure building well northwest of the islands is expected to push a front down the island chain, bringing increasing north-northeasterly winds in its wake. Winds may also strengthen enough to support the issuance of a small craft advisory in the typically windier waters around Maui and the Big Island on Sunday.

Hawaii Wave Height Model

Hawaii Swell Period Model
Hawaii Swell Height Model

Tide Predictions

High tide at Kahului was 1.6 foot at 2:13 AM late last night, dropping to a low of -0.6 foot at 8:32 AM this morning, then rising to a high of 2.6 foot at 3:37 PM early this afternoon, before once again dropping to a low of 0.5 foot at 9:58 PM late this evening

The sunrise was at 05:49 am this morning and will set at 06:54 pm this evening. The Moon is currently 1 days old, and is in a New Moon phase. The next Waxing Crescent will occur at 5:03 PM on Friday, May 13th.

Hawaii Wind Report

Maui Weather

Wind: n/a at 0 mph
current observations as of 6am October 20th, 2018

Weather Outlook for Saturday

A weakening front will push southward through the islands today and tonight, then stall out over the eastern end of the state Sunday through early next week. A short period of unsettled weather is expected as the front pushes through the smaller islands. The unsettled weather will likely be more persistent across windward sections of Maui and the Big Island as the front hangs up here through early next week before dissipating. A light to moderate trade wind pattern is then expected to return for the middle and latter part of next week.

Currently at the surface, a weakening cold front is pushing through Molokai, with increased northerly flow now in place across Kauai and Oahu in the wake of the front. Infrared satellite imagery shows mostly cloudy to cloudy skies in place across the western half of the state, with less cloud cover over Maui and the Big Island. Meanwhile, radar imagery shows scattered to numerous showers along and ahead of the front, with some more persistent rains across windward/mauka areas of Kauai and Oahu behind the front. Main short term concern for today revolves around rain chances.

Today, the southeastward progress of the front will slow considerably, resulting in an unsettled day across the Maui county islands. Over Kauai and Oahu, a drier airmass will settle in, but light showers are expected to continue to affect windward and mauka areas, especially this morning. Across the Big Island, light winds and increasing moisture in advance of the weakening front will likely lead to some enhanced sea breeze showers along the mountain slopes this afternoon.

Tonight through Tuesday night, the 00Z GFS and 00Z ECMWF have some small yet significant differences with respect to synoptic weather details. The GFS shows the front shifting southward into east Maui and the Big Island Saturday night, with the remnant moisture lingering in this same area through the first half of next week. The ECMWF on the other hand keeps the front and associated moisture over Maui county through the period. Although there is not much of a difference in overall positioning details, the resulting weather will be highly dependent on where the front and area of enhanced moisture hangs up.

Overall, we will follow a blended solution with a sizable amount of weight given to the previous forecast to help maintain some persistence. This results in unsettled weather conditions across primarily Maui and the Big Island through the period, with more typical trade wind showers over windward and mauka areas of the other smaller islands.

Wednesday through next Friday, model differences continue in the extended portion of the forecast, with the ECMWF showing high pressure building north of the islands resulting in a typical trade wind pattern. The GFS on the other hand shows surface troughing developing over the state, resulting in a sea and land breeze weather pattern. For now will stick with persistence, which is in line with typical climatology for this time of year. This results in a light to moderate trade wind pattern, with showers focused primarily across windward and mauka locales.

Central Valley (Kahului, Spreckelsville):

Mostly cloudy. Breezy. Scattered showers in the evening, then isolated showers after midnight. Lows around 68. Northeast winds 10 to 20 mph. Chance of rain 50 percent.

Leeward West (Lahaina, Ka`anapali):

HIGH SURF ADVISORY IN EFFECT UNTIL 6 AM HST SUNDAY. Breezy. Partly sunny with scattered showers. Highs 77 to 85. Light winds becoming northeast 10 to 20 mph in the late morning and afternoon. Chance of rain 50 percent.

Windward West (Wailuku, Waiehu):

Mostly cloudy. Breezy. Showers likely in the evening, then occasional showers after midnight. Lows 57 to 71. Northeast winds 10 to 20 mph. Chance of rain 90 percent.

Windard Haleakala (Hana, Haiku, Makawao):

HIGH SURF ADVISORY IN EFFECT UNTIL 6 AM HST SUNDAY. Mostly cloudy. Showers likely in the morning, then occasional showers in the afternoon. Haze through the day. Highs around 79 at the shore to around 66 at 5000 feet. Light winds becoming northeast 10 to 15 mph with gusts to 30 mph in the late morning and afternoon. Chance of rain 90 percent.

Leeward Haleakala (Kihei, Wailea, Makena):

HIGH SURF ADVISORY IN EFFECT UNTIL 6 AM HST SUNDAY. Partly sunny with isolated showers. Haze. Highs around 86 at the shore to around 71 upcountry. Light winds becoming north 10 to 15 mph with gusts to 30 mph in the late morning and afternoon. Chance of rain 20 percent.

Haleakala Summit

Mostly cloudy with scattered showers. Haze. Lows around 48 at the visitor center to around 42 at the summit. East winds up to 10 mph in the evening becoming light, then becoming southeast up to 10 mph early in the morning. Chance of rain 50 percent.

Photo of the Day

Surf Photo of the Day - May 7th, 2016