Surf Forecasts:
Kahului Harbor surf forecast from 1 Aug 2026:
- Best quality surf: Wednesday 5 Aug, 5AM (local time) - 4ft (1.2m), 10s period, ENE swell with cross-offshore winds.
- Most powerful swell: Monday 3 Aug, 11PM (local time) - 5ft (1.6m), 12s period, ENE swell with 701 kJ wave energy.
- Next surfable swell (1★+): Wednesday 5 Aug, 5AM (local time) - 4ft (1.2m), 10s 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 Wednesday (Aug 05) at 5AM. The primary swell is predicted to be 1.2m and 10s period with a secondary swell of 0.2m and 9s. 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 1.6m 12s and forecast to arrive on Monday (Aug 03) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 12s period and expected on Tuesday (Aug 04) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Wed 5th Aug) | 4ft (1.2m) 10s |
| Best Surf | 5AM (Wed 5th Aug) | 4ft (1.2m) 10s |
| Most Powerful | 11PM (Mon 3rd Aug) | 5ft (1.6m) 12s |
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. Gotta be straight with you – this stretch is looking pretty grim for the next two weeks. The pattern is dominated by a persistent ENE wind that just won't let up, and the swell is mostly short-period, wind-driven stuff. There’s not a single standout session in the whole 16-day window, so I’m calling it a long, quiet period for quality surf.
The first real chance to even think about paddling out is on Wednesday, August 5th, in the morning. We’ve got a 4ft swell from the ENE, period of 9 seconds, with combined energy of 226 (weak). The wind is a gentle cross-shore, so it’s not completely blown out, but it’s still a marginal, choppy affair. That’s the best we get, and it’s barely a 1 out of 10. The rest of the week is a write-off – cross-onshore winds, short-period, messy waves with scores of zero.
We then slide into a massive gap with absolutely no recommendations. From Friday, August 1st, all the way through to Tuesday, August 12th, every session is marked as "poor surf conditions." The wind stays cross or cross-on, the swell is a mix of weak, short-period ENE junk, and the energy values hover between 148 and 759 (weak to moderate). You’ll be battling chop and wind ripples, not riding waves.
Even the later part of the window, right up to Saturday, August 15th, offers nothing. The swell drops to 3ft from the NE on the morning of the 15th, and then does a weird shift to a 2ft swell from the WNW with a 14-second period in the afternoon. That’s a long-period groundswell, but it’s tiny and the wind is still a moderate cross-shore. The energy there is 454 (moderate), but the conditions are still poor.
Honestly, for Kahului Harbor, this is a total blank run. It’s a reef break, but with this persistent ENE wind and short-period swell, it’s not going to offer anything worth your time. The water temp is sitting at 80°F, about average for this time of year, but that’s the only nice thing to say. If you’re desperate for a paddle, the morning of August 5th is your only slim chance, but don’t expect much. For now, the forecasts can change, but this looks like a solid two-week wait.
Rusty out.
Short Range ForecastSome drizzle, heaviest during Mon morning. Warm (max 27°C on Fri afternoon, min 24°C on Sun night). Mainly fresh winds. | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Mon night. Warm (max 27°C on Wed morning, min 25°C on Mon night). Wind will be generally light. | |||||||||||||||||||
Fri 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | ||||||||||||||
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 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 11 | ENE 11 | ENE 11 | ENE 10 | ENE 9 | ENE 9 | E 8 | ENE 8 | ENE 7 | ENE 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 395 | 533 | 560 | 660 | 581 | 537 | 537 | 390 | 294 | 284 | 653 | 444 | 496 | 301 | 218 | 264 | 137 | 143 | 136 | 161 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross | cross | cross-on | cross | cross-on | cross | cross |
High Tide | 4:04PM0.80m | 3:39AM0.48m | 4:25PM0.76m | 4:25AM0.49m | 4:43PM0.71m | 5:20AM0.50m | 4:58PM0.65m | 6:31AM0.50m | 5:07PM0.58m | 8:17AM0.53m | 4:59PM0.52m | 10:35AM0.60m | ||||||||
Low Tide | 10:34PM0.19m | 9:31AM0.05m | 11:00PM0.16m | 10:03AM0.14m | 11:27PM0.13m | 10:39AM0.24m | 11:58PM0.11m | 11:22AM0.35m | 00:37AM0.08m | 12:37PM0.46m | 1:32AM0.06m | 2:47AM0.04m | ||||||||
 |  | | | | | |  |  |  |  | | | | | | | | | | |
 | — | — | 5:58 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — |
 | 7:04 | — | — | 7:04 | — | — | 7:02 | — | — | 7:02 | — | — | 7:01 | — | — | 7:01 | — | — | 7:00 | — |
mm | — | — | — | — | — | — | — | — | 1 | — | 2 | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 26 | 27 | 27 | 25 | 27 | 26 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 27 | 27 | 26 | 26 | 27 | 26 |
Feels °C | 26 | 25 | 26 | 26 | 24 | 27 | 25 | 25 | 27 | 27 | 27 | 28 | 28 | 28 | 29 | 29 | 27 | 27 | 29 | 27 |
Swell 1 Height (m) Direction Period (s) | E 15 | E 14 | E 14 | E 14 | E 14 | E 14 | E 13 | E 13 | E 13 | E 12 | N 7 | ENE 11 | W 13 | ENE 10 | NNE 9 | NNE 8 | N 8 | N 8 | W 12 | NNW 7 |
| kJ | 222 | 202 | 194 | 196 | 183 | 142 | 130 | 125 | 119 | 104 | 4 | 444 | 13 | 301 | 8 | 7 | 5 | 5 | 11 | 5 |
Swell 2 Height (m) Direction Period (s) | N 8 | N 8 | N 8 | SW 14 | N 10 | N 9 | N 9 | N 8 | N 8 | N 7 | W 12 | SW 17 | N 10 | N 9 | W 12 | W 12 | W 13 | W 13 | NNW 8 | ENE 11 |
| kJ | 12 | 12 | 5 | 8 | 18 | 15 | 14 | 12 | 11 | 10 | 11 | 11 | 2 | 7 | 11 | 11 | 13 | 13 | 6 | 11 |
Swell 3 Height (m) Direction Period (s) | WSW 16 | WSW 15 | WSW 15 | N 8 | SW 14 | SW 14 | W 12 | W 12 | W 11 | W 12 | W 18 | W 14 | SW 17 | W 12 | SW 16 | SW 16 | SW 16 | SW 15 | N 8 | W 12 |
| kJ | 25 | 22 | 21 | 5 | 8 | 8 | 3 | 3 | 2 | 3 | 6 | 4 | 11 | 12 | 10 | 10 | 9 | 9 | 4 | 11 |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 11 | — | ENE 11 | ESE 7 | ENE 9 | ENE 9 | E 8 | ENE 8 | ENE 7 | ENE 7 |
| kJ | 395 | 533 | 560 | 660 | 581 | 537 | 537 | 390 | 294 | 284 | 653 | — | 496 | 5 | 218 | 264 | 137 | 143 | 136 | 161 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 18 | 18 | 18 | 18 | 18 | 12 | 198 | 18 | 18 | 18 | 4 | 4 | 11 | 4 | 4 | 12 | 4 | 12 | 18 | 18 |
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.
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