Surf Forecasts:
Kahului Harbor surf forecast from 29 Jul 2026:
- Best quality surf: Wednesday 29 Jul, 5AM (local time) - 6.5ft (2.0m), 10s period, ENE swell with glassy winds.
- Most powerful swell: Tuesday 28 Jul, 8PM (local time) - 7.5ft (2.3m), 12s period, ENE swell with 1,372 kJ wave energy.
- Next surfable swell (1★+): Wednesday 29 Jul, 5AM (local time) - 6.5ft (2.0m), 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 (Jul 29) at 5AM. The primary swell is predicted to be 2.0m and 10s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Kahului Harbor in the next 16 days are 2.3m 12s and forecast to arrive on Tuesday (Jul 28) at 8PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Wednesday (Jul 29) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Wed 29th Jul) | 6.5ft (2.0m) 10s |
| Best Surf | 5AM (Wed 29th Jul) | 6.5ft (2.0m) 10s |
| Most Powerful | 8PM (Tue 28th Jul) | 7.5ft (2.3m) 12s |
Table - best surf conditions forecast for Kahului Harbor over the next 16 days.
The Lowdown
Alright, Rusty here. Let's get into it. Honestly, for the next couple of weeks, we’re looking at a bit of a rough stretch. The only spot that’s even on the table is Kahului Harbor, a heavy reef break that’s strictly for advanced surfers. The water's sitting at 79°, which is pretty much normal for this time of year, so no surprises there.
For the rest of today, Tuesday the 28th of July, it's a write-off. We’ve got a solid 8ft swell from the ENE with a decent 12-second period creating a lot of energy (1754), but the wind is a stiff 12 mph onshore from the NNE. The report says it’s marginal at best, so I wouldn't bother paddling out.
Now, Wednesday morning, July 29th, is our one true standout window. The swell drops to a manageable 4ft from the ENE, and the wind goes glassy—just 3 mph from the ENE. That’s the cleanest we’re going to see. The period is a modest 9 seconds, so it’s not a powerful groundswell, but for this exposed reef, the conditions will be clean. The energy is moderate at 477. Just be aware that crowds are possible here. After that, the onshore winds kick back in, and it’s downhill from there.
From Wednesday afternoon right through the end of the forecast, it’s grim. The wind stays onshore or cross-shore and picks up to 9-16 mph, turning everything into a choppy mess. By the time we hit Thursday, July 30th, we’re looking at poor surf conditions with cross-shore chop. The swell hangs around 4ft to 7ft, but with that wind, it’s just ugly. By the second week of August, the swell stays small and the period drops to 6-7 seconds, meaning weak, short-period windswell with energy readings barely cracking 100-300. It’s not good for a paddle surfer. Honestly, with that constant cross-shore wind on a fairly exposed break, this setup looks more interesting for kite surfing than paddle surfing through most of August.
So, to sum it up: If you’re an advanced guy, get out Wednesday morning for a clean session. After that, take a break. The forecast is quiet for a long stretch, but in these parts, it never stays flat forever.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Tue afternoon, min 24°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Fri afternoon, min 24°C on Fri night). Wind will be generally light. | |||||||||||||||||||
Tue 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | ||||||||||||||
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 12 | ENE 10 | ENE 9 | ENE 9 | E 8 | ENE 8 | ENE 7 | E 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 12 |
Wave Graph  | ||||||||||||||||||||
 kJ | 1564 | 983 | 266 | 202 | 412 | 202 | 292 | 266 | 355 | 416 | 497 | 592 | 678 | 636 | 641 | 512 | 475 | 328 | 331 | 725 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | glassy | cross | cross-off | cross | cross | cross | cross | cross-on | cross | cross | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 2:52PM0.82m | 1:41AM0.43m | 3:17PM0.83m | 2:19AM0.45m | 3:42PM0.83m | 2:58AM0.47m | 4:04PM0.80m | 3:39AM0.48m | 4:25PM0.76m | 4:25AM0.49m | 4:43PM0.71m | 5:20AM0.50m | 4:58PM0.65m | |||||||
Low Tide | 9:22PM0.25m | 7:57AM-0.07m | 9:46PM0.23m | 8:28AM-0.05m | 10:10PM0.21m | 8:59AM-0.02m | 10:34PM0.19m | 9:31AM0.05m | 11:00PM0.16m | 10:03AM0.14m | 11:27PM0.13m | 10:39AM0.24m | 11:58PM0.11m | |||||||
 |  |  | |  | | | | | | | | | | | | | | | | |
 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — | 6:00 | — | — |
 | 7:06 | — | — | 7:05 | — | — | 7:05 | — | — | 7:04 | — | — | 7:04 | — | — | 7:02 | — | — | 7:02 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 25 | 26 | 26 | 26 | 27 | 27 | 26 | 27 | 27 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 |
Feels °C | 29 | 27 | 29 | 29 | 29 | 27 | 27 | 26 | 27 | 26 | 24 | 25 | 25 | 25 | 26 | 25 | 25 | 27 | 27 | 25 |
Swell 1 Height (m) Direction Period (s) | ENE 12 | ENE 10 | ENE 9 | ENE 9 | E 8 | NNW 6 | E 18 | E 16 | E 15 | E 15 | E 14 | E 14 | E 14 | E 14 | E 14 | E 14 | E 14 | E 14 | ENE 13 | ENE 12 |
| kJ | 1564 | 983 | 266 | 202 | 228 | 13 | 96 | 183 | 228 | 222 | 202 | 191 | 257 | 257 | 200 | 203 | 181 | 232 | 286 | 725 |
Swell 2 Height (m) Direction Period (s) | NNE 9 | SW 15 | NNE 9 | NNE 8 | N 8 | E 19 | WSW 18 | N 9 | N 9 | N 8 | N 8 | WSW 15 | N 11 | N 10 | N 9 | N 9 | N 8 | N 6 | W 12 | W 12 |
| kJ | 190 | 9 | 211 | 149 | 72 | 28 | 30 | 15 | 14 | 12 | 5 | 21 | 9 | 18 | 15 | 14 | 12 | 11 | 3 | 10 |
Swell 3 Height (m) Direction Period (s) | — | — | SW 14 | S 13 | SW 19 | WSW 18 | N 10 | WSW 17 | WSW 16 | WSW 16 | WSW 15 | N 12 | SW 14 | SW 14 | SW 14 | SW 14 | W 13 | N 8 | SW 13 | SW 18 |
| kJ | — | — | 8 | 3 | 15 | 31 | 7 | 27 | 25 | 25 | 22 | 3 | 8 | 8 | 8 | 8 | 3 | 5 | 6 | 12 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | E 8 | ENE 8 | ENE 7 | E 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | — |
| kJ | — | — | — | — | 412 | 202 | 292 | 266 | 355 | 416 | 497 | 592 | 678 | 636 | 641 | 512 | 475 | 328 | 331 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 18 | 18 | 0 | 4 | 0 | 20 | 12 | 12 | 12 | 18 | 18 | 12 | 12 | 18 | 18 | 18 | 12 | 4 | 18 | 4 |
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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