Surf Forecasts:
Kahului Harbor surf forecast from 27 Aug 2026:
- Most powerful swell: Tuesday 1 Sep, 8AM (local time) - 5.5ft (1.7m), 9s period, ENE swell with 444 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 1.7m 9s and forecast to arrive on Tuesday (Sep 01) 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 0.2m 17s period and expected on Saturday (Aug 29) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8AM (Tue 1st Sep) | 5.5ft (1.7m) 9s |
Table - best surf conditions forecast for Kahului Harbor over the next 16 days.
The Lowdown
Alright, let’s talk about what’s going on. For the next 16 days, the only spot that’s been in the mix is Kahului Harbor (Maui), and it’s been a rough ride. The water’s about 80°, which is pretty normal for this time of year, so no big deal there.
Right now, the swell is coming from the ENE at about 5ft, but the period is short – just 6 seconds – and the wind is a cross-on from the NE at 12 mph. The combined energy is weak at 163, and the surf is poor. It’s choppy, messy, and not worth paddling out for. This is a reef break, but with that short period and onshore wind, it’s just not holding any shape.
We’ve got a long stretch of nothing. From Wednesday afternoon all the way through to the morning of Thursday the 3rd of September, it’s the same story: small swell, cross or cross-on winds, and poor conditions. The scores are all zeros, and the wave comment says it all – “poor surf conditions.” The combined energy does bump up a bit around the 29th of August (309-319), but it’s still weak to moderate, and the wind is still messing things up.
Then, from the morning of Thursday the 3rd of September through to the end of the forecast, we get a slight improvement. The scores go from 0 to 1, and the comments change to “marginal surf forecast or questionable tide conditions.” The swell drops off a bit, with heights around 4ft to 5ft, and the period stretches to 8 seconds. The wind eases off to a light breeze, mostly cross-shore, which is a big step up. The combined energy stays moderate (261-338). But it’s still not clean. It’s a marginal window, and the wave quality is still a question mark.
The best of the bunch would be the morning of Friday the 4th of September. Swell is 5ft from the ENE, period 8 seconds, and the wind is light and cross-shore from the ENE at 6 mph. The combined energy is 318. It’s not great, but it’s the least bad option. The direction is close to the optimum NNE, but not quite. Still, for a reef break, that period and light wind might give you a few workable waves. Expect crowds to be possible, as it’s a known spot.
But honestly, if you’re looking for a proper surf, this isn’t it. The setup is more interesting for kite surfing than paddle surfing, given the cross-on wind and short period.
Hang tight, the forecasts can change.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Wed afternoon, min 24°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Sun night. Warm (max 27°C on Sat afternoon, min 24°C on Sat night). Wind will be generally light. | |||||||||||||||||||
Wed 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | ||||||||||||||
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 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | NE 8 | ENE 8 | ENE 8 | ENE 8 | NE 8 |
Wave Graph | ||||||||||||||||||||
149 | 135 | 135 | 135 | 114 | 115 | 127 | 140 | 181 | 210 | 191 | 204 | 175 | 198 | 348 | 418 | 374 | 392 | 383 | 418 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross | cross-on | cross | cross-on | cross-on | cross | cross-on | cross-on | cross |
High Tide | 2:15PM0.81m | 1:38AM0.52m | 2:37PM0.81m | 2:14AM0.56m | 2:57PM0.80m | 2:52AM0.60m | 3:16PM0.76m | 3:32AM0.62m | 3:34PM0.71m | 4:17AM0.64m | 3:49PM0.64m | 5:09AM0.63m | 4:00PM0.58m | |||||||
Low Tide | 8:36PM0.21m | 7:42AM-0.01m | 8:55PM0.17m | 8:15AM0.02m | 9:15PM0.13m | 8:48AM0.07m | 9:38PM0.10m | 9:22AM0.14m | 10:01PM0.07m | 9:59AM0.23m | 10:28PM0.05m | 10:40AM0.33m | 10:59PM0.04m | |||||||
— | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | |
6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | 3 |
Temp °C | 27 | 25 | 27 | 27 | 25 | 27 | 26 | 25 | 27 | 27 | 25 | 27 | 27 | 25 | 27 | 27 | 26 | 27 | 27 | 26 |
Feels °C | 26 | 24 | 27 | 27 | 25 | 27 | 26 | 25 | 27 | 26 | 25 | 28 | 27 | 25 | 28 | 28 | 27 | 29 | 28 | 27 |
Swell 1 Height (m) Direction Period (s) | NW 10 | NW 10 | NW 10 | N 8 | NNE 7 | E 15 | E 15 | E 13 | E 13 | E 12 | E 12 | E 11 | ENE 11 | ENE 10 | WSW 16 | WSW 15 | ENE 8 | WSW 18 | E 15 | E 13 |
14 | 15 | 15 | 11 | 9 | 72 | 109 | 130 | 125 | 106 | 72 | 62 | 39 | 33 | 24 | 22 | 374 | 30 | 17 | 32 | |
Swell 2 Height (m) Direction Period (s) | SW 18 | SW 16 | N 8 | NW 9 | E 16 | NNE 6 | NW 8 | NW 8 | SW 18 | SW 17 | WSW 17 | WSW 16 | WSW 16 | WSW 16 | W 11 | W 12 | SW 16 | E 15 | SW 18 | SW 16 |
12 | 11 | 6 | 13 | 44 | 8 | 3 | 3 | 12 | 12 | 27 | 26 | 24 | 24 | 2 | 3 | 9 | 4 | 12 | 11 | |
Swell 3 Height (m) Direction Period (s) | W 10 | N 9 | SW 16 | W 10 | WNW 9 | WNW 9 | W 10 | W 19 | NW 8 | NW 8 | NW 8 | W 12 | W 10 | W 11 | — | — | W 12 | W 11 | SW 14 | NW 12 |
2 | 2 | 10 | 2 | 8 | 8 | 2 | 7 | 3 | 3 | 3 | 3 | 2 | 2 | — | — | 3 | 2 | 8 | 6 | |
Wind waves Height (m) Direction Period (s) | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | NE 8 | — | ENE 8 | ENE 8 | NE 8 |
149 | 135 | 135 | 135 | 114 | 115 | 127 | 140 | 181 | 210 | 191 | 204 | 175 | 198 | 348 | 418 | — | 392 | 383 | 418 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 18 | 12 | 12 | 18 | 4 | 12 | 18 | 12 | 18 | 12 | 18 | 12 | 12 | 12 | 12 | 18 | 4 | 4 | 18 | 18 |
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.











