Surf Forecasts:
Kahului Harbor surf forecast from 6 Jul 2026:
- Most powerful swell: Sunday 12 Jul, 11PM (local time) - 6.5ft (2.0m), 8s period, ENE swell with 452 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 2.0m 8s and forecast to arrive on Sunday (Jul 12) at 11PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 16s period and expected on Sunday (Jul 12) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Sun 12th Jul) | 6.5ft (2.0m) 8s |
Table - best surf conditions forecast for Kahului Harbor over the next 16 days.
Updates in hr min s Forecast update imminent
Alright, Rusty here. Let's take a look at what's on the cards for Kahului Harbor.
Right off the bat, I gotta be straight with you: this stretch ain't looking pretty for the next little while. We’ve got a solid run of waves coming in, but the conditions are just off. For nearly three weeks now, the prevailing ENE winds are blowing cross-shore or cross-onshore, putting a nasty chop and lump on everything. The water temp is about average for this time of year, so nothing unusual there for a July.
We’re looking at a long, frustrating gap here. From the start of the period on July 6th right through to July 21st, every single session is marked as "poor surf conditions" with a score of 0. That's over two weeks of no-go surf. The swell is hanging around mostly in the 4 ft to 6 ft range, coming from the ENE or NE, but the period is a short, weak 7 to 8 seconds. That's windswell, not groundswell, and with the cross-shore chop, it’s just gonna be a messy, bumpy wall. The combined swell energy (301 to 466) suggests moderate wave energy, but it's all wasted on rough conditions.
There is no standout window here. The entire 16-day forecast is a bust for Kahului Harbor. It's a reef break that needs clean conditions to shine, and it's just not getting them.
If the wind stays onshore like this, with that much chop and a beach-and-reef setup, honestly, this might look more interesting for the kite crew than us paddle surfers. It's a tough run, but that's how it goes sometimes. Forecasts can change, but right now, I’d leave the board in the car.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Mon morning, min 24°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 6mm), mostly falling on Fri afternoon. Warm (max 27°C on Fri afternoon, min 24°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Monday 6 | Tuesday 7 | Wednesday 8 | Thursday 9 | Friday 10 | Saturday 11 | Sun 12 | |||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | ENE 7 | ENE 7 | NE 8 | ENE 8 | ENE 8 | ENE 8 | E 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 7 | ENE 7 | NE 8 | NE 8 | NE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 257 | 297 | 416 | 337 | 382 | 347 | 212 | 287 | 294 | 273 | 256 | 222 | 249 | 294 | 310 | 408 | 302 | 264 | 306 | 346 | 408 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-on | cross | cross | cross | cross | cross | cross-on | cross | cross | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 6:53AM0.38m | 6:21PM0.61m | 8:47AM0.43m | 6:42PM0.55m | 10:41AM0.53m | 7:00PM0.48m | 11:52AM0.64m | 12:42PM0.75m | 9:34PM0.37m | 1:26PM0.84m | 11:19PM0.36m | 2:08PM0.90m | |||||||||
Low Tide | 1:13AM0.16m | 11:32AM0.26m | 1:53AM0.12m | 12:43PM0.37m | 2:40AM0.06m | 3:32PM0.46m | 3:32AM0.01m | 4:29AM-0.05m | 8:19PM0.37m | 5:24AM-0.11m | 8:39PM0.33m | 6:18AM-0.15m | |||||||||
 |  | | | | | | | | | |  |  | |  |  | | | | | | |
 | — | 5:50 | — | — | 5:50 | — | — | 5:50 | — | — | 5:50 | — | — | 5:50 | — | — | 5:50 | — | — | 5:52 | — |
 | 7:10 | — | 7:10 | — | — | 7:10 | — | — | 7:10 | — | — | 7:10 | — | — | 7:10 | — | — | 7:09 | — | — | 7:09 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 2 | 2 | 2 | — | — |
Temp °C | 25 | 26 | 26 | 24 | 26 | 26 | 24 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 27 | 25 | 26 | 26 | 25 | 26 | 26 |
Feels °C | 24 | 24 | 24 | 22 | 24 | 24 | 23 | 25 | 24 | 24 | 26 | 26 | 26 | 27 | 28 | 26 | 26 | 26 | 25 | 26 | 26 |
Swell 1 Height (m) Direction Period (s) | NW 11 | SSW 16 | SW 16 | ESE 10 | SW 15 | SW 15 | NE 7 | SW 14 | SW 14 | S 14 | W 15 | W 14 | W 13 | W 13 | W 14 | W 13 | W 14 | WSW 18 | WSW 17 | WSW 16 | WSW 16 |
| kJ | 18 | 25 | 10 | 10 | 9 | 9 | 112 | 8 | 8 | 4 | 4 | 4 | 14 | 13 | 16 | 30 | 35 | 61 | 59 | 53 | 50 |
Swell 2 Height (m) Direction Period (s) | SW 16 | NW 10 | NW 10 | SW 15 | SE 10 | NW 9 | E 9 | — | — | W 16 | S 13 | S 13 | SW 14 | W 21 | SW 21 | WSW 19 | WSW 18 | W 14 | W 13 | W 13 | W 12 |
| kJ | 41 | 4 | 4 | 9 | 4 | 3 | 6 | — | — | 5 | 3 | 3 | 8 | 9 | 17 | 37 | 34 | 34 | 30 | 13 | 12 |
Swell 3 Height (m) Direction Period (s) | SE 10 | SE 10 | SE 10 | NW 10 | NW 9 | E 9 | SW 15 | — | — | — | — | W 18 | — | W 18 | — | — | — | W 18 | W 18 | W 13 | W 12 |
| kJ | 4 | 4 | 4 | 4 | 3 | 2 | 8 | — | — | — | — | 6 | — | 6 | — | — | — | 25 | 24 | 13 | 12 |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | NE 8 | ENE 8 | ENE 8 | ENE 8 | E 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 7 | ENE 7 | NE 8 | NE 8 | NE 8 |
| kJ | 257 | 297 | 416 | 337 | 382 | 347 | 212 | 287 | 294 | 273 | 256 | 222 | 249 | 294 | 310 | 408 | 302 | 264 | 306 | 346 | 408 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 18 | 19 | 18 | 18 | 18 | 18 | 12 | 12 | 18 | 12 | 12 | 12 | 18 | 12 | 18 | 12 | 18 | 18 | 18 | 12 | 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.
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