
Surf Forecasts:
Kahului Harbor surf forecast from 5 Sep 2026:
- Best quality surf: Monday 7 Sep, 11PM (local time) - 6ft (1.9m), 12s period, ENE swell with cross-offshore winds.
- Most powerful swell: Monday 7 Sep, 2PM (local time) - 8ft (2.4m), 12s period, ENE swell with 1,617 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 11PM (local time) - 6ft (1.9m), 12s period with ENE swell.
Best Forecast Surf Conditions for Kahului Harbor this week:
The surf forecast for Kahului Harbor over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Sep 07) at 11PM. The primary swell is predicted to be 1.9m and 12s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Kahului Harbor in the next 16 days are 2.4m 12s and forecast to arrive on Monday (Sep 07) at 2PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 14s period and expected on Tuesday (Sep 08) at 5AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Mon 7th Sep) | 6ft (1.9m) 12s |
| Best Surf | 11PM (Mon 7th Sep) | 6ft (1.9m) 12s |
| Most Powerful | 2PM (Mon 7th Sep) | 8ft (2.4m) 12s |
Table - best surf conditions forecast for Kahului Harbor over the next 16 days.
The Lowdown
Alright, Rusty here. Let's get into it.
We're looking at a tough stretch ahead for Kahului Harbor. The next few days are a bit of a write-off, with a lot of cross-shore and cross-onshore breezes messing up what swell is around. The water temp is sitting at a pretty average 80°F for this time of year, so nothing unusual there.
The week starts pretty messy. Saturday the 5th and Sunday the 6th are dominated by a persistent ENE wind, creating a cross-chop that will make it hard to find a clean face. The swell is there, around 6 ft to 7 ft coming from the ENE, but the conditions are just too bumpy. The combined wave energy is moderate to strong, but it's all wasted on the wind.
Now, the standout is Tuesday the 8th. That morning, the wind swings around to the SSE at only 6 mph, going offshore. This is a big deal. The swell drops slightly to 6 ft from the ENE, but the ocean turns glassy. The afternoon gets even better, with the wind dropping to practically nothing at 3 mph from the south, still offshore, and the swell easing to 5 ft. For a reef break, the clean conditions will make it the best session of the whole outlook. This is the one to circle. It's a short window, but it will be good.
After that, it's a long, grim run. From Wednesday the 9th all the way through to Sunday the 20th, the conditions are consistently poor. The wind stays mostly cross-onshore or cross, and the swell is a mix of short-period (7 to 9 seconds) windswell. The combined energy drops to weak or low-moderate figures. The surf is either too small, too choppy, or just plain messy. There's a lot of days there with nothing to recommend.
The best bet is to keep your eyes on Tuesday the 8th for a clean, offshore session at Kahului Harbor. The rest of the run is a frustrating one, but that's how it goes sometimes. The forecasts can always change, so don't give up hope completely.
Rusty.
Short Range ForecastLight rain (total 8mm), mostly falling on Sun night. Warm (max 28°C on Mon afternoon, min 25°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 29°C on Tue afternoon, min 24°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | ENE 13 | ENE 14 | ENE 13 | ENE 12 | ENE 12 | ENE 12 | ENE 13 | ENE 12 | ENE 11 | ENE 11 | ENE 10 | ENE 9 | E 13 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 12 | ENE 7 |
Wave Graph | |||||||||||||||||||||
1192 | 1379 | 1279 | 1100 | 1200 | 1261 | 1323 | 1468 | 917 | 745 | 457 | 238 | 163 | 214 | 172 | 203 | 197 | 214 | 181 | 633 | 249 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross | cross | cross | cross | cross | cross-off | off | off | cross | cross | cross | cross | cross-on | cross-on | cross | cross-on | cross-on | cross |
High Tide | 11:33AM0.74m | 12:17PM0.80m | 11:18PM0.35m | 12:51PM0.84m | 00:17AM0.43m | 1:22PM0.86m | 1:02AM0.51m | 1:49PM0.85m | 1:44AM0.59m | 2:14PM0.82m | 2:23AM0.65m | 2:37PM0.77m | 3:02AM0.68m | ||||||||
Low Tide | 4:07AM0.07m | 7:43PM0.28m | 5:19AM0.03m | 7:44PM0.24m | 6:13AM0.00m | 7:57PM0.20m | 6:59AM-0.01m | 8:15PM0.16m | 7:41AM0.02m | 8:35PM0.11m | 8:20AM0.07m | 8:55PM0.08m | |||||||||
6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | |
— | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | — | 6:31 | — | |
mm | — | — | — | — | 2 | 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 27 | 26 | 26 | 27 | 27 | 26 | 27 | 28 | 27 | 28 | 29 | 28 | 27 | 27 | 26 | 26 | 27 | 26 | 26 | 26 | 25 |
Feels °C | 29 | 28 | 28 | 29 | 28 | 27 | 28 | 29 | 28 | 31 | 32 | 32 | 29 | 28 | 27 | 25 | 27 | 26 | 26 | 27 | 26 |
Swell 1 Height (m) Direction Period (s) | NNE 10 | NNE 10 | ENE 13 | ENE 12 | WSW 16 | ENE 12 | WSW 16 | ENE 12 | ENE 11 | ENE 11 | ENE 10 | ENE 9 | E 13 | E 12 | E 12 | E 12 | E 12 | ENE 12 | ENE 12 | WNW 8 | WSW 17 |
21 | 33 | 1279 | 1100 | 24 | 1261 | 169 | 1121 | 917 | 745 | 457 | 238 | 163 | 153 | 106 | 103 | 103 | 152 | 147 | 6 | 28 | |
Swell 2 Height (m) Direction Period (s) | SSW 12 | SW 12 | NNE 9 | N 8 | N 10 | SW 15 | N 9 | WSW 15 | WSW 14 | WSW 12 | W 11 | E 13 | W 9 | WNW 11 | NW 10 | NW 9 | NW 9 | NW 8 | WSW 16 | WSW 17 | WNW 10 |
14 | 22 | 15 | 5 | 17 | 57 | 6 | 275 | 622 | 303 | 238 | 171 | 43 | 66 | 79 | 41 | 28 | 11 | 26 | 28 | 9 | |
Swell 3 Height (m) Direction Period (s) | WSW 16 | SW 12 | SW 16 | SSW 11 | SSW 11 | SW 12 | NW 15 | NW 14 | NW 13 | E 14 | E 14 | W 10 | NNW 11 | WSW 18 | WSW 16 | WSW 16 | WSW 18 | WSW 17 | NW 8 | SW 8 | W 12 |
27 | 6 | 40 | 12 | 12 | 21 | 8 | 8 | 27 | 138 | 192 | 94 | 12 | 30 | 26 | 26 | 31 | 28 | 10 | 3 | 3 | |
Wind waves Height (m) Direction Period (s) | ENE 13 | ENE 14 | — | — | ENE 12 | — | ENE 13 | ENE 12 | — | — | — | ESE 5 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 12 | ENE 7 |
1192 | 1379 | — | — | 1200 | — | 1323 | 1468 | — | — | — | 42 | 157 | 214 | 172 | 203 | 197 | 214 | 181 | 633 | 249 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 4 | 12 | 4 | 12 | 12 | 12 | 12 | 23 | 0 | 0 | 0 | 4 | 12 | 12 | 12 | 12 | 12 | 4 | 4 | 18 | 12 |
Best forecast wave conditions in Maui | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Kahului Harbor Surf forecast
The above surf forecast table for Kahului Harbor provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Kahului Harbor can be found by selecting the local surf guide option on the grey menu. Our Kahului Harbor surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Kahului Harbor) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Kahului Harbor may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Kahului Harbor is 3 km (2 miles) from Wailuku. If you plan a vacation in Maui, look for hotels and other accommodation in Wailuku. Wailuku has rooms for a wide range of budgets as well as car hire and transport links.










