Surf Forecasts:
Kahului Harbor surf forecast from 14 Jul 2026:
- Most powerful swell: Sunday 19 Jul, 2AM (local time) - 6ft (1.8m), 8s period, ENE swell with 404 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 1.8m 8s and forecast to arrive on Sunday (Jul 19) at 2AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 5s period and expected on Thursday (Jul 16) at 5AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Sun 19th Jul) | 6ft (1.8m) 8s |
Table - best surf conditions forecast for Kahului Harbor over the next 16 days.
The Lowdown
Alright everyone, Rusty here, let’s talk about what’s in the water for the next couple of weeks.
Honestly, we’re looking at a long, dry spell for the next week and a half. From now until Saturday, July 26th, the surf is just no good. The wind is constantly blowing from the wrong direction, cross-onshore or cross-shore, keeping everything choppy and full of bumps. There’s swell, but it’s all short-period, weak windswell that’s not worth paddling out for. You’re better off taking a break.
The first real sign of life comes on Sunday, July 26th. A massive, very long-period groundswell (16 seconds) finally shows up from the east. The combined energy is huge – hitting 975 (moderate to strong) in the morning and climbing to 1070 (strong) in the afternoon. Water temp is about 79°, which is normal for this time of year. The bad news is the wind is still cross-onshore, so the surface will be bumpy. But with that kind of period, the power is undeniable. The swell is 4ft, but with that period, it’ll have some serious punch. Kahului Harbor (Maui) is a reef, so it’ll handle that long period well. This is for the advanced crew only.
The best chance of the whole forecast comes on the morning of Monday, July 27th. The same powerful groundswell is still running, with a 15-second period and combined energy skyrocketing to 1129 (strong). The wind finally cooperates, going light and cross-shore, so the surface should be cleaner. Swell is still 4ft from the east. This is the window to get out. The afternoon will get messy again, so make it an early one.
By Tuesday, July 28th and Wednesday, July 29th, the swell gets bigger – 6ft to 7ft from the ENE with a 12-14 second period. The combined energy is insane: 1548 and 1694 on Tuesday, 1359 on Wednesday. That’s very, very strong. But the wind stays stubbornly cross-onshore, keeping it choppy. This is big, powerful, ugly surf. Only for experts who are ready for a battle.
So, my call is the morning of Monday, July 27th at Kahului Harbor. The long-period groundswell, the cleaner cross-shore wind, and the manageable 4ft size make it the standout. The long period means the sets will be more spaced out, making the paddle out easier, but the wave will be fast and powerful. It’s not perfect, but it’s the best we’ve got.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Wed afternoon. Warm (max 26°C on Thu morning, min 24°C on Tue morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Fri morning, min 23°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | |||||||||||||||
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) | NNE 7 | NE 8 | NE 7 | ENE 7 | ENE 5 | NE 7 | E 7 | ENE 6 | ENE 6 | E 6 | ENE 6 | E 7 | E 7 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 99 | 248 | 121 | 155 | 80 | 136 | 70 | 103 | 119 | 100 | 119 | 134 | 150 | 257 | 404 | 310 | 238 | 212 | 186 | 136 | 117 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross-on | cross | cross | cross | cross | cross | cross-on | cross | cross | cross | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross |
High Tide | 3:26PM0.94m | 2:24AM0.41m | 4:02PM0.91m | 3:17AM0.43m | 4:36PM0.86m | 4:10AM0.44m | 5:06PM0.79m | 5:09AM0.44m | 5:32PM0.71m | 6:19AM0.44m | 5:51PM0.62m | 7:53AM0.45m | 6:01PM0.55m | ||||||||
Low Tide | 10:12PM0.24m | 8:40AM-0.15m | 10:46PM0.22m | 9:23AM-0.08m | 11:19PM0.20m | 10:04AM0.02m | 11:52PM0.18m | 10:44AM0.13m | 00:26AM0.16m | 11:26AM0.26m | 1:00AM0.14m | 12:18PM0.37m | 1:38AM0.12m | ||||||||
 |  |  | |  |  | | | | | | | | | | | | | | | | |
 | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:54 | — | — | 5:54 | — | — | 5:54 | — | — | 5:54 | — | — |
 | — | 7:09 | — | — | 7:09 | — | — | 7:09 | — | — | 7:08 | — | — | 7:08 | — | — | 7:08 | — | — | 7:08 | — |
mm | — | — | — | — | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 25 | 24 | 25 | 25 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 25 | 26 | 24 |
Feels °C | 26 | 26 | 25 | 27 | 26 | 26 | 27 | 26 | 26 | 26 | 26 | 25 | 26 | 25 | 25 | 26 | 26 | 25 | 25 | 26 | 23 |
Swell 1 Height (m) Direction Period (s) | NNE 7 | WNW 16 | NE 7 | NE 7 | NNE 8 | W 15 | NNE 7 | NNE 7 | NNE 7 | NNE 7 | N 7 | NNE 7 | NNE 7 | N 8 | WNW 13 | NNE 8 | NNE 8 | W 12 | W 12 | NNE 7 | E 15 |
| kJ | 99 | 53 | 121 | 115 | 49 | 109 | 43 | 30 | 18 | 29 | 27 | 43 | 40 | 33 | 33 | 13 | 19 | 11 | 11 | 31 | 17 |
Swell 2 Height (m) Direction Period (s) | WNW 16 | W 14 | E 8 | W 15 | W 15 | WSW 16 | W 14 | W 14 | WNW 14 | WNW 14 | WNW 14 | WNW 13 | WNW 13 | WNW 13 | SW 14 | W 12 | W 12 | SW 19 | SW 18 | SW 18 | WSW 16 |
| kJ | 51 | 33 | 18 | 112 | 109 | 25 | 106 | 103 | 67 | 66 | 63 | 60 | 34 | 34 | 8 | 11 | 11 | 14 | 13 | 12 | 27 |
Swell 3 Height (m) Direction Period (s) | WSW 14 | SW 14 | WNW 15 | WSW 18 | WSW 18 | W 19 | WSW 16 | WSW 17 | WSW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | W 21 | W 20 | W 20 | S 13 | S 12 | W 12 | W 11 |
| kJ | 20 | 8 | 73 | 30 | 31 | 7 | 26 | 29 | 29 | 10 | 10 | 10 | 9 | 8 | 9 | 8 | 7 | 4 | 3 | 3 | 3 |
Wind waves Height (m) Direction Period (s) | E 8 | NE 8 | — | ENE 7 | ENE 5 | NE 7 | E 7 | ENE 6 | ENE 6 | E 6 | ENE 6 | E 7 | E 7 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 |
| kJ | 76 | 248 | — | 155 | 80 | 136 | 70 | 103 | 119 | 100 | 119 | 134 | 150 | 257 | 404 | 310 | 238 | 212 | 186 | 136 | 117 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 4 | 12 | 4 | 4 | 12 | 4 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 18 | 12 | 18 | 4 | 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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