2-4 am | 5-10+ pm
1-3 am | 4-6+ pm
1-3 foot
1-4 foot

A new northwest swell rose rapidly at buoy 51001 220 miles northwest of Kauai starting around 2:00 PM Friday afternoon. Forerunners from the swell reached Kauai and Oahu overnight but swell heights remain small. The swell is expected to peak Saturday evening, producing advisory level surf along north and west facing shores, then gradually subside. As that swell fades, a northwest swell generated from former Tropical Cyclone Chaba will arrive Monday, peak on Tuesday, then decline on Wednesday. The later swell will be a bit smaller and surf from that swell may not quite reach the advisory threshold. A Small Craft Advisory is in effect through early Saturday morning for strong trade winds over the windy areas around the Big Island and Maui. This advisory will likely be extended through Sunday. Winds will likely subside ahead of the shower band moving over the area Monday. Winds speeds will rebound behind the shower band and will likely remain strong through the rest of next week.

Hawaii Wave Height Model

Hawaii Swell Period Model
Hawaii Swell Height Model

Tide Predictions

Single high tide at Kahului will be 1.9 foot at 8:36 AM this morning.

The sunrise was at 06:18 am this morning and will set at 06:07 pm this evening. The Moon is currently 7 days old, and is in a Quarter phase. The next Waxing Gibbous will occur at 4:25 AM on Sunday, October 16th.

Hawaii Wind Report

Maui Weather

Wind: n/a at 0 mph
current observations as of 7am October 20th, 2018

Weather Outlook for Saturday

A surface ridge will maintain moderate trade winds through the Columbus Day Weekend. A trough aloft will linger near the Big Island through Saturday before a ridge aloft builds over the area from the west early next week. A band of showers along an old front will move south over the islands Columbus Day through Tuesday night. A high building east behind the shower band will produce breezy trade winds through the end of next week.

The surface analysis shows an east to west surface ridge about 225 miles north of Kauai. This ridge will keep trade winds blowing over the islands. Water vapor imagery and upper air analyses show a northeast to southwest trough aloft near the Big Island of Hawaii. The trough will linger near the Big Island through tomorrow, so afternoon showers on the Big Island may remain active.

Satellite loops and surface analyses show a frontal cloud band 375 miles north of Kauai. The global models all show this band moving south over the main Hawaiian Islands and bringing an increase in clouds and showers. The ECMWF shows the band reaching Kauai Monday morning while the GFS shows it reaching Monday evening. We will need to wait to refine the timing on the band. Both models show the band pushing down to the Big Island Tuesday night and dissipating near the Big Island Wednesday.

A new surface high will build northwest of the islands behind the old frontal band and a ridge aloft will build over the islands from the northwest. The ridge will stabilize the atmosphere over the islands and the building surface high will produce breezy trade winds. Breezy trade winds will continue through the end of next week.

Central Valley (Kahului, Spreckelsville):

Sunny and breezy. Highs around 86. Northeast winds 10 to 20 mph.

Leeward West (Lahaina, Ka`anapali):

Sunny and breezy. Isolated showers until late afternoon. Highs around 84. Northeast winds 10 to 20 mph. Chance of rain 20 percent.

Windward West (Wailuku, Waiehu):

Mostly sunny. Breezy. Scattered showers until late afternoon, then isolated showers late in the afternoon. Highs 70 to 84. Northeast winds 10 to 20 mph. Chance of rain 50 percent.

Windard Haleakala (Hana, Haiku, Makawao):

Mostly sunny with scattered showers. Highs around 82 at the shore to around 68 at 5000 feet. East winds 10 to 15 mph. Gusts up to 30 mph in the afternoon. Chance of rain 50 percent.

Leeward Haleakala (Kihei, Wailea, Makena):

Sunny. Highs around 86 at the shore to 69 to 76 upcountry. Light winds becoming northwest up to 10 mph with gusts to 30 mph in the late morning and early afternoon, then shifting to the southeast around 10 mph with gusts to 25 mph late in the afternoon.

Haleakala Summit

Sunny. Scattered showers until mid morning. Isolated showers in the late morning and early afternoon, then scattered showers late in the afternoon. Highs around 62 at the visitor center to around 59 at the summit. East winds around 10 mph. Chance of rain 40 percent.

Photo of the Day

Surf Photo of the Day - October 8th, 2016