
Surf Forecasts:
Kahului Harbor surf forecast from 13 Jul 2026:
- Most powerful swell: Monday 13 Jul, 5AM (local time) - 6ft (1.8m), 8s period, ENE swell with 372 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 Monday (Jul 13) at 5AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 15s period and expected on Wednesday (Jul 15) at 8AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5AM (Mon 13th Jul) | 6ft (1.8m) 8s |
Table - best surf conditions forecast for Kahului Harbor over the next 16 days.
The Lowdown
Alright, Rusty here. We’ve got a bleak stretch ahead for Kahului Harbor. This place is a reef break, exposed to swell, and the optimum direction is from the NNE. The problem is, the swell we’re seeing is mostly out of the ENE and E, and the wind is a persistent cross-onshore or cross breeze that’s just keeping it messy.
Now, there’s no surf to speak of right now. The whole first week, from Monday the 13th through to Sunday the 19th, is a total write-off. The swell is there, around 4 ft to 5 ft, but the wave comment is consistently "poor surf conditions" and the scores are zero. The wind is either a moderate or gentle breeze that’s cross-onshore, so it’s choppy and ugly. The energy runs from a weak 135 up to 318, which is still on the low side, so you're getting a bumpy, weak sea state. It’s not worth paddling out.
The water temperature is a balmy 79°, and that’s 0.4° above average, so it’s perfectly normal for the time of year.
We then get a bit of a blank for the morning of Monday the 20th, with a "marginal" call, but again the wind is wrong. This pattern of poor conditions stretches all the way to the morning of Thursday the 23rd. The swell heights stay between 4 ft and 5 ft but the wind just won't cooperate.
The first hint of something different doesn't come until the afternoon of Friday the 24th. The swell drops to 2 ft, but it’s coming from the E with a very long period of 16 seconds. That's a groundswell. The combined energy jumps to 539, which is moderate. The issue here is that at a reef break, a very long period swell can set up nicely, but the direction is still off the optimum. It's still "marginal" with a cross-shore breeze.
The real stand-out, if you can call it that, is much further out. On Tuesday the 28th, we start seeing some real energy. The morning has a swell of 6 ft from the E, with a period of 13 seconds. The combined energy is a very strong 1164. That’s serious power. By the afternoon, it bumps up to 6 ft from the ENE, with energy at 1272. The wind is still cross-onshore though, and the comment is still "marginal". For a spot that's consistently poor for two weeks, this is the best we're going to get. The swell direction is off ideal, but the power is undeniable. Because the swell is over 5 ft, it’s not for beginners. For a reef break with that much energy, you better know what you're doing.
In short, we have a solid 13-day gap of nothing good, and the one day that has the most punch on the 28th is still going to be tricky with the wind. For the majority of this window, this setup honestly looks more interesting for a kite surfer than a regular paddle surfer, given the constant cross-onshore wind and choppy conditions.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Mon night. Warm (max 26°C on Mon morning, min 23°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Thu morning, min 24°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | |||||||||||||||
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 | ENE 8 | NE 8 | NE 8 | ENE 7 | NE 7 | ENE 7 | NNE 8 | E 6 | ENE 6 | ENE 7 | ENE 6 | E 6 | E 7 | E 7 | E 8 | E 8 | E 8 | E 8 | E 8 |
Wave Graph | |||||||||||||||||||||
285 | 277 | 213 | 204 | 223 | 207 | 147 | 118 | 67 | 94 | 104 | 131 | 143 | 135 | 176 | 206 | 245 | 258 | 295 | 251 | 177 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross | cross | cross | cross-on | cross-on | cross | cross | cross-on | cross-on | cross | cross-on | cross |
High Tide | 2:48PM0.93m | 1:30AM0.39m | 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 | ||||||||
Low Tide | 9:39PM0.26m | 7:55AM-0.18m | 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 | ||||||||
5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:54 | — | — | 5:54 | — | — | 5:54 | — | — | |
— | 7:09 | — | — | 7:09 | — | — | 7:09 | — | — | 7:09 | — | — | 7:08 | — | — | 7:08 | — | — | 7:08 | — | |
mm | — | — | 1 | — | 1 | — | — | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 24 | 25 | 25 | 24 | 25 | 26 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 26 | 26 | 24 |
Feels °C | 26 | 26 | 24 | 26 | 26 | 24 | 26 | 27 | 26 | 26 | 26 | 26 | 27 | 27 | 28 | 26 | 26 | 25 | 27 | 26 | 24 |
Swell 1 Height (m) Direction Period (s) | SW 16 | W 16 | W 14 | WNW 16 | WNW 16 | NE 7 | W 15 | NNE 8 | NNE 8 | NNE 8 | NNE 7 | NNE 8 | NNE 7 | N 7 | NNE 7 | NNE 7 | N 7 | NNE 8 | NNE 8 | NNE 8 | NNE 8 |
39 | 19 | 15 | 51 | 53 | 134 | 112 | 63 | 67 | 44 | 31 | 33 | 30 | 27 | 18 | 38 | 26 | 45 | 23 | 23 | 58 | |
Swell 2 Height (m) Direction Period (s) | W 12 | SW 15 | WSW 14 | SW 14 | W 14 | E 8 | WSW 18 | W 15 | W 15 | W 14 | W 14 | WNW 14 | WNW 14 | WNW 14 | WNW 13 | WNW 13 | WNW 13 | WNW 13 | W 12 | W 12 | W 12 |
11 | 35 | 21 | 8 | 33 | 18 | 30 | 109 | 109 | 106 | 103 | 67 | 66 | 63 | 60 | 34 | 34 | 33 | 11 | 11 | 11 | |
Swell 3 Height (m) Direction Period (s) | W 20 | NW 20 | WNW 18 | WSW 19 | SW 14 | WNW 15 | SW 13 | WSW 18 | WSW 16 | WSW 16 | WSW 17 | WSW 17 | SW 16 | SW 16 | SW 16 | SW 10 | SW 15 | SW 14 | W 20 | W 20 | SW 19 |
8 | 15 | 31 | 37 | 8 | 73 | 7 | 31 | 25 | 26 | 29 | 29 | 10 | 10 | 10 | 4 | 8 | 8 | 8 | 7 | 14 | |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | NE 8 | NE 8 | ENE 7 | NE 7 | ENE 7 | E 7 | E 6 | ENE 6 | ENE 7 | ENE 6 | E 6 | E 7 | E 7 | E 8 | E 8 | E 8 | E 8 | E 8 |
285 | 277 | 213 | 204 | 223 | 207 | 147 | 118 | 57 | 94 | 104 | 131 | 143 | 135 | 176 | 206 | 245 | 258 | 295 | 251 | 177 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 18 | 18 | 4 | 4 | 18 | 4 | 12 | 12 | 12 | 12 | 20 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 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.










