0-3 foot
0-2 foot
2-4 foot
2-4 foot


Surf along south facing shores will hold through the overnight hours due to a south-southeast swell that filled in through the day Friday. The latest observations at buoys 51003/51002/51004 south of the islands continue to reflect this energy, however, have started to depict a downward trend over the past few hours within the 15 and 16 second bands. Surf along south facing shores will correspond and ease through the day Saturday. Looking ahead into next weekend, mainly small background reinforcing pulses out of the south will keep the surf from going flat each day.

Surf along east facing shores will remain small through the weekend due to weaker trades locally and upstream of the state. This trend will likely continue into next week. Although confidence remains low this far out, a small long-period east (90°) swell from distant Tropical Storm Kenneth, currently centered over the eastern Pacific, could fill in and impact exposed eastern shores through the middle to latter half of next week.

Winds and seas are expected to remain below Small Craft Advisory levels through the weekend as the pressure gradient weakens. An upper low that is expected to drift southwest over the region may lead to better shower coverage later in the weekend over portions of the marine area, and could even produce a few thunderstorms Sunday night into early next week. Wind speeds will increase again later next week.

Water levels are running around 7 to 8 inches above the predicted levels due to a sea surface height anomaly associated with an oceanic eddy moving through the islands from east to west. This combined with the normal King Tide will result in coastal flooding in the vulnerable low-lying coastal locations each day through the weekend. Flooding will be expected through the afternoon hours each day through the weekend around the peak daily high tide cycles. The peak of this event is expected Saturday afternoon, when total waters levels will likely top what was observed in Honolulu at the end of April earlier this year.

Hawaii Wave Height Model

Hawaii Swell Period Model
Hawaii Swell Height Model


Tide Predictions

High tide at Kahului was 1.4 foot at 12:09 AM just after midnight, dropping to a low of -0.3 foot at 6:27 AM early this morning, then rising to a high of 2.8 foot at 1:42 PM early this afternoon, before once again dropping to a low of 0.7 foot at 8:11 PM early this evening

The sunrise was at 06:05 am this morning and will set at 06:52 pm this evening. The Moon is currently 27 days old, and is in a Waning Crescent phase. The next New Moon will occur at 6:31 PM on Monday, August 21st.

Hawaii Wind Report

Maui Weather

90°/96°
Wind: NE at 24 mph
Sunrise: 6:06 AM
Sunset: 6:50 PM
current observations as of 1pm August 21st, 2017

Weather Outlook for Saturday

Lighter trade winds will prevail across the islands over the weekend into early next week as a high ridge far north weakens. The lighter winds will allow local sea breezes to be more prominent across leeward areas, with an increase in clouds and showers each afternoon and evening. Meanwhile, low clouds carried by the trades will still continue to affect windward and mauka areas at times. Moisture from an old tropical cyclone will increase shower coverage and bring muggy conditions to the state late Saturday through the first half of next week. Expect drier and windier conditions to return late next week as a stronger high pressure rebuilds far north.

Trade winds continue to decrease across the islands this evening as high pressure ridge far north weakens. Quite a bit of low clouds are present in the southern islands vicinity this evening, with the bulk of it affecting windward Big Island at this time. Do expect these clouds to reach Maui later this evening and possibly Molokai overnight. Elsewhere there are still some more low clouds, and will bring some showers to mainly windward areas.

Trade winds will ease slightly further over the rest of the weekend as pressure gradient further relaxes across the region. Looks like the trade winds will hang on across the area, though sea breezes over the lee areas will become more prominent under the lighter trade wind regime. Clouds and showers will develop over the lee areas during the afternoon and evening. Meanwhile, low clouds carried by the lighter trade winds will continue to affect windward areas at times.

An upper level trough just north-northeast of the islands will shift more west and deepens over the weekend into early next week. Thus airmass in the island vicinity will slowly become more unstable, allowing low clouds in the area to be slowly enhanced. In addition, tropical moisture is expected to reach the islands beginning Sunday then through early part of next week. Look for increased shower coverage across the islands, with an overall muggy feel to the air early next week. There is still concern upon the potential thunderstorm threat and locally heavy rain early next week. Shall await new model guidance before changing the forecast weather scenario for that period.

Forecast models still indicate possible weather improvement for the island towards later part of next week as the upper level feature as well as the tropical moisture moves west of the state. A surface high may also rebuild far north of the islands, with trade winds possibly increasing back into the moderate to locally breezy range.

Central Valley (Kahului, Spreckelsville):

Mostly sunny with isolated showers. Highs 86 to 91. East winds 10 to 15 mph. Gusts up to 35 mph in the morning then 35 mph late in the afternoon. Chance of rain 20 percent.

Leeward West (Lahaina, Ka`anapali):

Mostly sunny with isolated showers. Highs 82 to 89. Northeast winds 10 to 15 mph. Chance of rain 20 percent.

Windward West (Wailuku, Waiehu):

Partly sunny with scattered showers. Highs 68 to 86. Northeast winds 10 to 15 mph. Chance of rain 50 percent.

Windard Haleakala (Hana, Haiku, Makawao):

Mostly cloudy. Occasional showers in the morning, then scattered showers in the afternoon. Highs around 83 at the shore to around 70 at 5000 feet. East winds 10 to 15 mph. Chance of rain 80 percent.

Leeward Haleakala (Kihei, Wailea, Makena):

Sunny in the morning, then partly sunny with isolated showers in the afternoon. Highs around 90 at the shore to 71 to 77 upcountry. East winds 10 to 15 mph. Gusts up to 35 mph late in the afternoon. Chance of rain 20 percent.

Haleakala Summit

Mostly sunny. Scattered showers in the morning, then isolated showers in the afternoon. Highs around 61 at the visitor center to around 58 at the summit. East winds around 15 mph. Chance of rain 50 percent.

Photo of the Day

Surf Photo of the Day - August 19th, 2017

Read more