Surf Forecasts:
Kahului Harbor surf forecast from 7 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 2AM (local time) - 6.5ft (2.0m), 12s period, ENE swell with cross-offshore winds.
- Most powerful swell: Monday 7 Sep, 8PM (local time) - 8ft (2.4m), 12s period, ENE swell with 1,513 kJ wave energy.
- Next surfable swell (1★+): Tuesday 8 Sep, 2AM (local time) - 6.5ft (2.0m), 12s period with ENE swell.
Best Forecast Surf Conditions for Kahului Harbor this week:
The surf forecast for Kahului Harbor over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Sep 08) at 2AM. The primary swell is predicted to be 2.0m and 12s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Kahului Harbor in the next 16 days are 2.4m 12s and forecast to arrive on Monday (Sep 07) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 15s period and expected on Tuesday (Sep 08) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Tue 8th Sep) | 6.5ft (2.0m) 12s |
| Best Surf | 2AM (Tue 8th Sep) | 6.5ft (2.0m) 12s |
| Most Powerful | 8PM (Mon 7th Sep) | 8ft (2.4m) 12s |
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 on offer for the next couple of weeks.
Right off the bat, we've got a pretty grim stretch ahead. The first few days are a write-off for me. We're looking at a long gap of poor quality surf that runs from the start of the period all the way through to the end of the first week. There's a little window of hope on Tuesday the 8th, but it's surrounded by days of choppy, onshore junk.
The only real standout in this whole 16-day window is Kahului Harbor. It's a reef setup, advanced level, and it only works when the wind and swell line up. It's a fickle spot, and it's not consistent, so when it's on, you've gotta be on it.
The one shot you've got is Tuesday the 8th. The morning is looking crisp with a moderate offshore breeze out of the south at 16 mph, and a 6ft groundswell wrapping in from the ENE with an 11-second period. The combined energy is moderate, sitting at 883. The water is sitting at about 80°, which is perfectly normal for this time of year. The afternoon is even cleaner, with the wind dropping to a glassy 3 mph offshore and the swell settling to 5ft. That afternoon session is the best of the bunch, no question. It's a short window though, so make it count.
After that, it's back to the grind. From Wednesday the 9th onwards, it's mostly cross-shore and cross-onshore winds, short period windswell, and poor conditions. The combined swell energy drops into the hundreds and even into the low 100s, which is weak. The surf gets a bit bigger towards the end of the second week, with chest to head-high swell around 6ft to 7ft, but the wind is always a problem, keeping it lumpy and chopped out. It's going to be a long wait for the next proper session.
This is Rusty, signing off. Keep your eyes on the horizon.
Short Range ForecastLight rain (total 8mm), mostly falling on Wed afternoon. Warm (max 29°C on Tue morning, min 25°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Thu afternoon, min 24°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | |||||||||||||||
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) | E 12 | ENE 12 | ENE 12 | ENE 11 | ENE 10 | NE 9 | E 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | NE 7 | ENE 11 | ENE 8 | ENE 10 | ENE 10 | ENE 10 | NNE 9 | NE 9 | NE 8 | NE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 672 | 1324 | 1029 | 745 | 504 | 247 | 302 | 181 | 208 | 223 | 168 | 116 | 431 | 209 | 320 | 209 | 205 | 94 | 164 | 153 | 118 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | off | off | glassy | cross | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-on | cross | cross-on | cross-on | cross-on |
High Tide | 12:51PM0.84m | 00:17AM0.43m | 1:22PM0.86m | 1:02AM0.51m | 1:49PM0.85m | 1:44AM0.59m | 2:14PM0.82m | 2:23AM0.65m | 2:37PM0.77m | 3:02AM0.68m | 2:57PM0.71m | 3:41AM0.70m | 3:14PM0.64m | 4:21AM0.69m | |||||||
Low Tide | 7:44PM0.24m | 6:13AM0.00m | 7:57PM0.20m | 6:59AM-0.01m | 8:15PM0.16m | 7:41AM0.02m | 8:35PM0.11m | 8:20AM0.07m | 8:55PM0.08m | 8:58AM0.13m | 9:16PM0.05m | 9:35AM0.21m | 9:36PM0.04m | ||||||||
 |  |  |  |  | | | |  | | | | | | | | | | | | | |
 | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — |
 | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — | — | 6:30 | — |
mm | — | 1 | — | 1 | — | — | 1 | 4 | 1 | — | — | — | — | — | — | — | — | — | — | — | 2 |
Temp °C | 27 | 28 | 28 | 29 | 29 | 28 | 27 | 27 | 27 | 26 | 27 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 |
Feels °C | 27 | 28 | 30 | 30 | 31 | 33 | 31 | 29 | 29 | 27 | 28 | 25 | 27 | 27 | 26 | 28 | 27 | 26 | 27 | 27 | 26 |
Swell 1 Height (m) Direction Period (s) | E 12 | WSW 17 | ENE 12 | ENE 11 | ENE 10 | NE 9 | ENE 8 | E 13 | E 12 | E 12 | E 11 | E 11 | ENE 8 | WSW 17 | NNE 7 | NNE 8 | NE 8 | NNE 9 | SW 16 | ENE 9 | NE 8 |
| kJ | 672 | 246 | 1029 | 745 | 504 | 247 | 211 | 156 | 144 | 103 | 93 | 89 | 183 | 27 | 28 | 62 | 74 | 94 | 9 | 15 | 118 |
Swell 2 Height (m) Direction Period (s) | SW 14 | NW 14 | WSW 15 | WSW 11 | W 10 | E 13 | E 13 | NW 8 | NW 7 | NW 9 | NW 8 | WSW 17 | NNE 8 | WNW 9 | WSW 17 | WSW 16 | WSW 16 | NW 15 | SE 8 | ESE 9 | ESE 8 |
| kJ | 70 | 8 | 924 | 281 | 234 | 176 | 168 | 23 | 14 | 31 | 9 | 28 | 13 | 8 | 28 | 25 | 25 | 9 | 2 | 8 | 22 |
Swell 3 Height (m) Direction Period (s) | SW 17 | — | NNW 13 | E 14 | E 14 | W 8 | WSW 6 | NW 11 | WSW 16 | WSW 16 | WSW 18 | NW 10 | WSW 16 | SW 10 | NW 10 | NW 9 | NW 9 | NW 9 | NW 9 | WNW 13 | ENE 8 |
| kJ | 12 | — | 17 | 138 | 189 | 45 | 14 | 19 | 26 | 26 | 31 | 4 | 26 | 4 | 4 | 3 | 3 | 3 | 3 | 17 | 7 |
Wind waves Height (m) Direction Period (s) | ENE 6 | ENE 12 | — | — | — | — | E 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | NE 7 | ENE 11 | ENE 8 | ENE 10 | ENE 10 | ENE 10 | ENE 9 | NE 9 | NE 8 | — |
| kJ | 212 | 1324 | — | — | — | — | 302 | 181 | 208 | 223 | 168 | 116 | 431 | 209 | 320 | 209 | 205 | 86 | 164 | 153 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 115 | 23 | 0 | 0 | 0 | 0 | 20 | 12 | 12 | 12 | 12 | 4 | 4 | 12 | 4 | 4 | 4 | 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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