Surf Forecasts:
Kahului Harbor surf forecast from 30 Jul 2026:
- Most powerful swell: Saturday 1 Aug, 5PM (local time) - 7ft (2.2m), 8s period, ENE swell with 660 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 2.2m 8s and forecast to arrive on Saturday (Aug 01) at 5PM. 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 18s period and expected on Thursday (Jul 30) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5PM (Sat 1st Aug) | 7ft (2.2m) 8s |
Table - best surf conditions forecast for Kahului Harbor over the next 16 days.
The Lowdown
Alright, Rusty here. Let's see what's cooking.
Gotta be honest, this is a tough one for Kahului Harbor. The whole 16-day stretch is a bit of a battle. There's swell on the way, but the wind is going to be a constant headache. Don't expect any magic until at least the morning of Monday, August 5th.
We're starting with a long dry spell. From Thursday, July 30th, right through to Sunday, August 4th, it's all poor or marginal surf. The wind is mostly cross or cross-onshore, keeping the surface choppy and messy. The swell is there, but it's short-period and weak. Water temp is about 80°, which is normal for the season.
The only real highlight, if you can call it that, is the morning of Wednesday, August 5th. We get a 5ft swell from the ENE with a period of 9 seconds. The combined energy is moderate (556), so there's a bit of push. The wind is a light cross-shore from the ENE, which should give us a cleaner face than the rest of the week. It's a marginal call, but it's the best option on the board.
After that, it's back into the same old story of poor conditions through to the end of the window. The afternoon of Tuesday, August 11th shows a 5ft swell from the ENE with a cross-shore wind, but it's a short 7-second period, so it's still a marginal prospect, not a solid session.
There's no classic day in this forecast. The conditions are too inconsistent for a reliable, clean wave. For this area, a blank run like this isn't unheard of. Let's hope the forecasts shift in our favor.
Rusty.
Short Range ForecastMostly dry. Warm (max 28°C on Thu morning, min 24°C on Fri night). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Sun morning, min 24°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | |||||||||||||||
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 8 | ENE 8 | E 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 12 | ENE 11 | ENE 11 | ENE 10 | ENE 9 | ENE 9 | E 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 202 | 232 | 266 | 337 | 364 | 484 | 614 | 660 | 567 | 537 | 488 | 422 | 339 | 290 | 599 | 460 | 531 | 325 | 326 | 197 | 137 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross-on | cross-on | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-on | cross |
High Tide | 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 | 6:31AM0.50m | 5:07PM0.58m | 8:17AM0.53m | 4:59PM0.52m | ||||||||
Low Tide | 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 | 11:22AM0.35m | 00:37AM0.08m | 12:37PM0.46m | 1:32AM0.06m | |||||||
 |  |  | | |  | | | | | | | | | | | |  |  |  |  | |
 | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — |
 | — | 7:05 | — | — | 7:04 | — | — | 7:04 | — | — | 7:02 | — | — | 7:02 | — | — | 7:01 | — | — | 7:01 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 1 |
Temp °C | 28 | 28 | 26 | 27 | 27 | 26 | 26 | 26 | 25 | 27 | 27 | 25 | 26 | 26 | 25 | 26 | 26 | 26 | 26 | 27 | 26 |
Feels °C | 29 | 29 | 26 | 27 | 26 | 25 | 24 | 25 | 24 | 27 | 27 | 24 | 27 | 26 | 25 | 28 | 28 | 28 | 28 | 29 | 28 |
Swell 1 Height (m) Direction Period (s) | ENE 8 | E 18 | E 16 | E 15 | E 15 | E 14 | E 14 | E 14 | E 14 | E 14 | E 13 | E 13 | E 12 | E 13 | ENE 12 | ENE 11 | W 13 | ENE 10 | ENE 9 | NNE 9 | N 8 |
| kJ | 202 | 96 | 183 | 228 | 219 | 202 | 194 | 196 | 183 | 142 | 130 | 87 | 108 | 156 | 599 | 460 | 13 | 325 | 222 | 7 | 5 |
Swell 2 Height (m) Direction Period (s) | E 19 | WSW 18 | N 9 | N 9 | N 8 | N 8 | N 8 | SW 14 | N 10 | N 9 | N 9 | N 8 | N 8 | N 8 | N 6 | N 7 | N 10 | NNE 10 | NNE 9 | W 12 | W 13 |
| kJ | 28 | 30 | 15 | 14 | 12 | 12 | 5 | 8 | 18 | 15 | 14 | 12 | 11 | 4 | 10 | 1 | 8 | 9 | 8 | 11 | 14 |
Swell 3 Height (m) Direction Period (s) | WSW 18 | N 10 | WSW 17 | WSW 16 | WSW 16 | WSW 15 | WSW 15 | N 11 | SW 14 | SW 14 | W 12 | W 12 | W 11 | W 12 | W 12 | SW 17 | SW 17 | W 12 | W 12 | SW 16 | SW 15 |
| kJ | 31 | 7 | 27 | 25 | 25 | 22 | 21 | 9 | 8 | 8 | 3 | 3 | 2 | 3 | 11 | 11 | 11 | 11 | 11 | 10 | 9 |
Wind waves Height (m) Direction Period (s) | — | ENE 8 | E 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | — | — | ENE 11 | ESE 8 | ENE 9 | ENE 9 | E 8 |
| kJ | — | 232 | 266 | 337 | 364 | 484 | 614 | 660 | 567 | 537 | 488 | 422 | 339 | 290 | — | — | 531 | 6 | 326 | 197 | 137 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 20 | 12 | 12 | 12 | 18 | 18 | 19 | 12 | 18 | 12 | 18 | 18 | 4 | 21 | 4 | 4 | 4 | 4 | 4 | 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.
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