
Surf Forecasts:
Kahului Harbor surf forecast from 4 Aug 2026:
- Most powerful swell: Tuesday 4 Aug, 5PM (local time) - 5ft (1.5m), 11s period, ENE swell with 521 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 1.5m 11s and forecast to arrive on Tuesday (Aug 04) 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 0.2m 13s period and expected on Tuesday (Aug 04) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5PM (Tue 4th Aug) | 5ft (1.5m) 11s |
Table - best surf conditions forecast for Kahului Harbor over the next 16 days.
The Lowdown
Alright, this is Rusty. Let's talk about what's cookin' for the next couple weeks.
Right now, we're in a bit of a dry spell, and I mean that in the worst way for a surfer. The first week or so is looking pretty sad. The wind is mostly coming in from the ENE, light to moderate, but it's all cross-shore or cross-onshore, keeping things choppy and messy. The swell is small, mostly around 3 ft to 5 ft, and the period is short, around 5 to 9 seconds, so there's no real push or shape to it. The combined energy is weak to moderate at best, with readings like 106 to 523 (moderate wave energy). Conditions are just poor surf for days on end, with a few sessions marked as "marginal surf forecast or questionable tide conditions".
Honestly, the only break that's even on the menu is Kahului Harbor (Maui). It's a consistent, advanced-level reef break that can handle swell from the NNE, which is the optimum direction. But this swell is coming from the ENE, so it's not in the sweet spot. The water temp is about 80°F, which is pretty normal for the time of year, so at least a good wetsuit isn't an issue.
We've got a massive gap of nothing good for the first 11 days. It's a real bummer.
Then, things start to shift around the 15th of August. The swell starts to build. We're looking at a moderate cross-shore wind, cleaner than what we've been seeing, but still not perfect. The swell picks up to 6 ft to 7 ft from the ENE, with a period of 8 seconds. The combined energy starts to climb, hitting 645 (moderate wave energy) on the morning of the 16th. That's more like it. The forecast says "marginal surf forecast or questionable tide conditions" for the 15th and 16th mornings, which is better than "poor".
The standout, if you can call it that, is the morning of Sunday, August 16th. The swell is going to be a solid 7 ft from the ENE, with a period of 8 seconds. The wind is a clean cross-shore from the ENE at 25 km/h. This is the biggest wave we see in the whole window, and the energy is decent (645). It's getting into the size where it's more for the experienced crew, and this reef break can get a bit heavy. Crowds are possible here, as it's consistent and can get some attention. The morning of the 15th is also a runner-up, with 6 ft and similar conditions.
The sessions after that start to drop back down, with the wind turning more cross-onshore again, so that window is where you want to be. It's a long-range call, so keep your fingers crossed the forecast holds, but it's the only real glimmer of hope in the whole 16 days.
Rusty.
Short Range ForecastSome drizzle, heaviest during Thu afternoon. Warm (max 26°C on Tue morning, min 24°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Sun morning. Warm (max 27°C on Sat morning, min 25°C on Fri morning). Wind will be generally light. | ||||||||||||||||||||
Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 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) | ENE 11 | ENE 11 | ENE 10 | ENE 9 | ENE 9 | NE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 5 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 |
Wave Graph | |||||||||||||||||||||
436 | 521 | 325 | 207 | 211 | 158 | 183 | 131 | 86 | 96 | 61 | 101 | 168 | 215 | 254 | 283 | 364 | 355 | 280 | 283 | 268 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross | cross | cross | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross |
High Tide | 5:07PM0.58m | 8:17AM0.53m | 4:59PM0.52m | 10:35AM0.60m | 11:51AM0.70m | 12:37PM0.79m | 10:03PM0.34m | 1:16PM0.86m | 11:50PM0.37m | 1:52PM0.90m | 00:51AM0.42m | ||||||||||
Low Tide | 11:22AM0.35m | 00:37AM0.08m | 12:37PM0.46m | 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 | ||||||||||
6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:03 | — | — | |
— | 7:01 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — | — | 6:59 | — | |
mm | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | 1 | 2 | — | — | — | — |
Temp °C | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 26 | 27 | 27 | 25 | 26 | 26 | 26 | 27 | 27 | 26 |
Feels °C | 28 | 28 | 26 | 28 | 28 | 26 | 27 | 27 | 26 | 26 | 27 | 27 | 28 | 27 | 25 | 27 | 27 | 27 | 28 | 28 | 27 |
Swell 1 Height (m) Direction Period (s) | ENE 11 | W 13 | ENE 10 | NNE 9 | NNE 8 | NNE 8 | N 8 | NNW 8 | NNW 8 | NNW 7 | NNW 7 | NE 11 | NE 10 | NE 10 | NE 9 | NE 9 | W 12 | W 11 | W 11 | N 9 | N 8 |
436 | 13 | 325 | 8 | 7 | 6 | 5 | 7 | 11 | 10 | 5 | 18 | 24 | 14 | 22 | 14 | 11 | 9 | 9 | 6 | 5 | |
Swell 2 Height (m) Direction Period (s) | W 11 | N 10 | N 9 | W 12 | W 12 | W 12 | W 11 | NW 8 | NE 11 | W 10 | NE 12 | NNW 7 | N 7 | WSW 18 | WSW 18 | WSW 17 | N 7 | WSW 16 | N 9 | W 10 | W 10 |
2 | 2 | 7 | 11 | 11 | 11 | 10 | 2 | 5 | 9 | 23 | 5 | 3 | 31 | 30 | 27 | 4 | 25 | 6 | 8 | 8 | |
Swell 3 Height (m) Direction Period (s) | SW 17 | SW 17 | W 12 | SW 16 | SW 16 | SW 16 | NW 8 | W 12 | W 12 | SW 14 | SW 20 | WSW 19 | WSW 18 | N 6 | W 13 | W 12 | WSW 16 | N 10 | SW 16 | SW 16 | SW 15 |
11 | 11 | 12 | 10 | 10 | 9 | 3 | 11 | 11 | 8 | 15 | 37 | 33 | 3 | 13 | 11 | 26 | 8 | 10 | 10 | 9 | |
Wind waves Height (m) Direction Period (s) | — | ENE 11 | — | ENE 9 | ENE 9 | NE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 5 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 |
— | 521 | — | 207 | 211 | 158 | 183 | 131 | 86 | 96 | 61 | 101 | 168 | 215 | 254 | 283 | 364 | 355 | 280 | 283 | 268 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 4 | 12 | 4 | 4 | 18 | 12 | 12 | 18 | 12 | 12 | 12 | 12 | 12 | 18 | 12 | 12 | 12 | 12 | 12 | 12 | 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.











