
Surf Forecasts:
Kahului Harbor surf forecast from 4 Sep 2026:
- Best quality surf: Monday 7 Sep, 5PM (local time) - 7ft (2.1m), 12s period, ENE swell with cross-offshore winds.
- Most powerful swell: Monday 7 Sep, 8AM (local time) - 8ft (2.4m), 13s period, E swell with 1,932 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 5PM (local time) - 7ft (2.1m), 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 5PM. The primary swell is predicted to be 2.1m 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 13s and forecast to arrive on Monday (Sep 07) at 8AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 15s period and expected on Monday (Sep 07) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5PM (Mon 7th Sep) | 7ft (2.1m) 12s |
| Best Surf | 5PM (Mon 7th Sep) | 7ft (2.1m) 12s |
| Most Powerful | 8AM (Mon 7th Sep) | 8ft (2.4m) 13s |
Table - best surf conditions forecast for Kahului Harbor over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s coming up for Kahului Harbor.
Right off the bat, I gotta say, the next 16 days look like a bit of a mixed bag, and you’ll be waiting a few days for anything decent. The water temp is sitting at 80°, which is bang on average for this time of year, so no surprises there.
The first real chance to wet a line is not until Monday, the 7th. The morning is still a bit rough with a 8ft swell from the ENE, but the wind is a moderate cross-shore, so it’s pretty messy. However, Monday afternoon is where it starts to get interesting. The wind swings to a light cross-offshore from the ESE, cleaning things up nicely. You’ve got a 7ft swell from the ENE with a moderate 12-second period, and the combined energy is solid (1318). This is excellent surf for experienced surfers, but at over 8ft, it’s too big for beginners. The crowd factor is listed as “sometimes,” so you might have a few others out, but it’s worth the paddle.
Tuesday the 8th is the real standout. The morning is a special one with barely any wind (SE at 3 mph), swinging cross-offshore. The swell drops to a clean 6ft from the ENE, but the period is a solid 11 seconds, giving it some good shape. The energy is moderate (768), and the conditions are clean. The afternoon holds up too, with a light offshore breeze and a 5ft swell from the NE. This is the best on offer for the whole forecast – clean, shoulder-high waves and almost no wind. Get out there for it.
After Tuesday, things go downhill. From Wednesday the 9th onward, the onshore winds take over, and the swell mixes up with short periods. There’s a few days in the second week where the swell is over 7ft, but the wind is cross-onshore and the period is short (8-9 seconds), so it’s going to be lumpy and choppy. The energy is mostly moderate (500-1000 range), but the quality just isn’t there for a good paddle.
The very end of the run, from around the 17th to the 19th, the swell fades to under 5ft, and the wind stays onshore. It’s not looking like a finisher.
So, to sum it up: Monday afternoon the 7th is your best bet for bigger, powerful waves if you’ve got the skill, but Tuesday the 8th is the real gem – clean, smaller, and glassy. Don’t sleep on it.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Sun night. Warm (max 27°C on Fri morning, min 24°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Tue night. Warm (max 28°C on Mon morning, min 24°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | |||||||||||||||
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) | E 14 | ENE 14 | ENE 14 | ENE 13 | ENE 14 | ENE 13 | ENE 13 | E 12 | E 12 | ENE 13 | ENE 12 | ENE 12 | ENE 11 | NE 10 | E 14 | E 13 | E 13 | ENE 7 | ENE 7 | ENE 8 | ENE 12 |
Wave Graph | |||||||||||||||||||||
439 | 1533 | 1428 | 1192 | 1519 | 1249 | 1323 | 1175 | 1290 | 1931 | 1310 | 1024 | 622 | 334 | 257 | 225 | 219 | 222 | 197 | 232 | 787 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross-off | off | cross-off | cross-off | cross | cross-on | cross-on | cross | cross | cross-on | cross |
High Tide | 10:22AM0.66m | 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 | |||||||||
Low Tide | 2:20AM0.09m | 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 | ||||||||||
6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | |
— | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | |
mm | — | — | — | — | — | — | — | 2 | 3 | — | — | — | — | — | 1 | — | — | 1 | — | — | 1 |
Temp °C | 27 | 27 | 25 | 27 | 27 | 26 | 27 | 27 | 26 | 28 | 28 | 27 | 28 | 28 | 28 | 28 | 27 | 26 | 26 | 27 | 25 |
Feels °C | 25 | 26 | 24 | 28 | 28 | 27 | 28 | 27 | 27 | 29 | 29 | 30 | 32 | 32 | 32 | 30 | 28 | 26 | 25 | 26 | 24 |
Swell 1 Height (m) Direction Period (s) | E 14 | N 8 | NNE 11 | NNE 10 | NNE 10 | ENE 13 | SW 16 | SW 15 | SW 15 | ENE 13 | ENE 12 | ENE 12 | ENE 11 | NE 10 | NE 8 | E 13 | E 13 | E 13 | E 12 | ENE 13 | ENE 12 |
439 | 5 | 13 | 21 | 19 | 1249 | 122 | 113 | 229 | 1532 | 1310 | 1024 | 622 | 334 | 118 | 225 | 219 | 202 | 196 | 232 | 787 | |
Swell 2 Height (m) Direction Period (s) | SW 13 | SW 13 | SSW 13 | SSW 12 | SW 12 | SW 16 | N 8 | N 10 | N 9 | WSW 16 | WSW 15 | WSW 12 | W 11 | W 10 | E 14 | WNW 9 | NW 11 | NW 10 | NW 9 | NW 9 | NW 8 |
7 | 7 | 17 | 14 | 39 | 88 | 12 | 17 | 15 | 679 | 1063 | 400 | 274 | 116 | 257 | 56 | 72 | 61 | 55 | 51 | 25 | |
Swell 3 Height (m) Direction Period (s) | NW 9 | N 13 | W 19 | WSW 16 | — | N 9 | N 11 | — | N 16 | N 9 | NW 14 | NNW 13 | E 14 | E 14 | NW 10 | NW 11 | WSW 17 | WSW 16 | WSW 16 | WSW 18 | WSW 17 |
3 | 3 | 7 | 27 | — | 14 | 9 | — | 5 | 6 | 8 | 17 | 146 | 192 | 50 | 20 | 30 | 26 | 26 | 31 | 28 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 14 | ENE 14 | ENE 13 | ENE 14 | — | ENE 13 | E 12 | E 12 | ENE 13 | — | — | — | — | E 5 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 8 | — |
280 | 1533 | 1428 | 1192 | 1519 | — | 1323 | 1175 | 1290 | 1931 | — | — | — | — | 28 | 135 | 151 | 222 | 197 | 214 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 18 | 18 | 12 | 4 | 18 | 12 | 12 | 12 | 12 | 20 | 0 | 0 | 0 | 0 | 4 | 4 | 18 | 18 | 12 | 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.










