
Surf Forecasts:
Kahului Harbor surf forecast from 6 Aug 2026:
- Most powerful swell: Sunday 9 Aug, 5PM (local time) - 6ft (1.8m), 8s period, ENE swell with 384 kJ wave energy.
Best Forecast Surf Conditions for Kahului Harbor this week:
The most powerful waves expected at Kahului Harbor in the next 16 days are 1.8m 8s and forecast to arrive on Sunday (Aug 09) at 5PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 4s period and expected on Thursday (Aug 06) at 5AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5PM (Sun 9th Aug) | 6ft (1.8m) 8s |
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 the next couple of weeks are serving up for Kahului Harbor. I gotta be straight with you – this stretch is a cruel one for us paddle surfers.
The story is mostly a frustrating one of persistent cross-onshore wind, mainly out of the ENE, just chewing up the surface. We’ve got swell on the cards, no doubt, but the quality is shot for the vast majority of the time. There’s a long, drawn-out run of poor to marginal conditions right through until late in the month. From now up until the morning of the 19th, it’s a real grind, with everything getting chopped up by that breeze. Even when the swell bumps up to around 5ft to 6ft in the second week, the cross-off wind just kills it.
For the keen-eyed, the energy does creep up. By the morning of the 15th, the combined swell energy is a moderate reading of 387, and it climbs to a moderate-to-strong 706 by the morning of Monday the 17th, with waves hitting 7ft. But that's all arriving with a 12 to 15 mph cross-onshore wind. That’s a nope from me for a surfboard; if you’ve got a kite, that Sunday the 16th or Monday the 17th might start looking interesting.
There’s a tiny glimmer of hope right at the very tail end. Check out the morning of the 21st. We’ve got a shift in the wind to a glassy NNE, light as a feather. The swell will be a clean 4ft with a 9-second period from the NE, the exact direction this place loves. The combined energy is a moderate 270. That looks like the one and only real chance for a smooth session. It’s still a week and a half away, so don’t hold your breath, but that morning is *easily* the best bet on the whole calendar.
So, for the short term, it's a write-off. Come back and check the forecast again closer to that 21st. The odds are against us, but that’s the call.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Fri morning, min 24°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 5mm), mostly falling on Sat night. Warm (max 27°C on Sun afternoon, min 25°C on Sat night). Wind will be generally light. | ||||||||||||||||||
Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | ||||||||||||||
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 8 | ENE 8 | ENE 8 | ENE 7 | ENE 5 | ENE 5 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 8 | ENE 7 | E 7 | ENE 7 | ENE 7 |
Wave Graph | |||||||||||||||||||
108 | 51 | 131 | 86 | 48 | 60 | 135 | 161 | 225 | 233 | 345 | 384 | 280 | 199 | 234 | 193 | 130 | 160 | 147 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | cross | cross-on | cross | cross | cross | cross-on | cross | cross-on | cross-on | cross | cross | cross-on | cross-on | cross-on | cross | cross |
High Tide | 10:35AM0.60m | 11:51AM0.70m | 12:37PM0.79m | 10:03PM0.34m | 1:16PM0.86m | 11:50PM0.37m | 1:52PM0.90m | 00:51AM0.42m | 2:25PM0.92m | 1:42AM0.48m | |||||||||
Low Tide | 1:32AM0.06m | 2:47AM0.04m | 4:09AM0.00m | 8:44PM0.33m | 5:19AM-0.05m | 8:26PM0.30m | 6:16AM-0.09m | 8:41PM0.26m | 7:05AM-0.11m | 9:02PM0.23m | |||||||||
— | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:03 | — | — | 6:03 | — | — | |
7:01 | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — | — | 6:59 | — | — | 6:58 | — | |
mm | — | — | — | — | — | — | — | — | — | 1 | 2 | — | — | — | 2 | — | — | — | — |
Temp °C | 25 | 26 | 26 | 25 | 27 | 27 | 26 | 27 | 27 | 25 | 26 | 27 | 26 | 27 | 27 | 26 | 27 | 27 | 26 |
Feels °C | 26 | 27 | 27 | 26 | 28 | 29 | 27 | 27 | 26 | 25 | 27 | 28 | 27 | 29 | 29 | 27 | 28 | 28 | 27 |
Swell 1 Height (m) Direction Period (s) | ENE 8 | ENE 8 | NNW 8 | NNW 8 | NNW 7 | NE 7 | NE 11 | NE 10 | N 6 | NE 9 | NE 9 | NNW 11 | NNW 10 | NNW 9 | NNW 9 | NNW 8 | NE 6 | NNW 8 | NNW 7 |
108 | 43 | 6 | 11 | 10 | 24 | 18 | 24 | 3 | 14 | 13 | 24 | 33 | 28 | 16 | 13 | 32 | 6 | 5 | |
Swell 2 Height (m) Direction Period (s) | NNE 8 | N 8 | W 12 | NE 11 | W 11 | NNW 7 | NNW 7 | N 7 | WSW 18 | WSW 18 | WSW 17 | WSW 16 | NE 9 | NE 8 | W 10 | W 10 | NNW 8 | W 10 | W 10 |
6 | 5 | 11 | 5 | 9 | 5 | 5 | 3 | 31 | 30 | 27 | 26 | 12 | 11 | 8 | 8 | 12 | 8 | 8 | |
Swell 3 Height (m) Direction Period (s) | W 12 | W 11 | N 7 | W 12 | SW 14 | NE 12 | WSW 19 | WSW 18 | SW 13 | N 6 | W 12 | W 11 | W 11 | W 11 | SW 16 | SW 15 | W 10 | SW 15 | SW 19 |
11 | 10 | 4 | 11 | 8 | 23 | 37 | 33 | 7 | 3 | 11 | 10 | 9 | 9 | 10 | 9 | 8 | 8 | 15 | |
Wind waves Height (m) Direction Period (s) | — | ENE 5 | ENE 8 | ENE 7 | ENE 5 | ENE 5 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 8 | ENE 7 | E 7 | ENE 7 | ENE 7 |
— | 51 | 131 | 86 | 48 | 60 | 135 | 161 | 225 | 233 | 345 | 384 | 280 | 199 | 234 | 193 | 130 | 160 | 147 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 4 | 12 | 4 | 12 | 12 | 12 | 12 | 20 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 |
Best forecast wave conditions in Maui | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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.











