Surf Forecasts:
Kahului Harbor surf forecast from 15 Aug 2026:
- Best quality surf: Saturday 22 Aug, 5AM (local time) - 3ft (0.9m), 7s period, ENE swell with cross-offshore winds.
- Most powerful swell: Saturday 15 Aug, 8PM (local time) - 15ft (4.5m), 10s period, E swell with 4,214 kJ wave energy.
- Next surfable swell (1★+): Saturday 22 Aug, 5AM (local time) - 3ft (0.9m), 7s 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 Saturday (Aug 22) at 5AM. The primary swell is predicted to be 0.9m and 7s period with a secondary swell of 0.4m and 8s. 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 4.5m 10s and forecast to arrive on Saturday (Aug 15) at 8PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Saturday (Aug 22) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Sat 22nd Aug) | 3ft (0.9m) 7s |
| Best Surf | 5AM (Sat 22nd Aug) | 3ft (0.9m) 7s |
| Most Powerful | 8PM (Sat 15th Aug) | 15ft (4.5m) 10s |
Table - best surf conditions forecast for Kahului Harbor over the next 16 days.
The Lowdown
Alright folks, Rusty here, looking at the charts for the next couple of weeks. Honestly, it's a bit of a tough stretch for Kahului Harbor. The surf's going to be pretty messy for the next week or so, with a lot of choppy, cross-shore wind conditions. Don't get your hopes up for anything clean or fun just yet.
We've got a bit of a wait on our hands. The first real glimmer of hope doesn't show up until the tail end of the forecast. The whole first week is a write-off with poor conditions, so you're looking at a solid 10-day gap of frustration.
The standout period finally arrives around the 27th of August. On Thursday the 27th, the wind eases up a bit in the morning, becoming a gentle cross-shore breeze. The swell drops to a clean 5 ft from the east, with a much longer period of 17 seconds. That's a proper groundswell, and the energy is strong, reading 1369. It's still marginal, but it's the best we've seen. The same goes for Friday the 28th and Saturday the 29th, with similar conditions. The swell sticks around 5 ft to 5 ft from the east, with that same long period. The water temperature is sitting at 80°, which is pretty normal for this time of year.
The best window might actually be Sunday the 30th of August. We see a little bump in swell height to 7 ft from the ENE with a 13-second period, and the wind is still a gentle cross-shore in the morning. The energy is pumping at 1496. It's a solid size, but it's still a "marginal" call, so keep your expectations in check. That long-period east swell is best for the reefs here, as it can be a bit tricky and close out on the beach breaks.
For the whole stretch, the wind is mostly cross or cross-onshore, which keeps the surface choppy. There's no clean, glassy spell to get really excited about. If you're a beginner, the 7 ft swell on the 30th might be a bit much, and it's a bit of a mission for anyone. Honestly, with the consistent wind and chop, this setup might be more interesting for the kite surfers than us paddle guys for most of the period.
Bottom line: Prepare for a long wait. The end of the month (August 27th to 30th) has the most promise, but it's still a gamble. The forecasts are always a bit less certain this far out, so keep an eye on it, but don't book the day off work just yet.
Rusty.
Short Range ForecastHeavy rain (total 40mm), heaviest during Sat night. Warm (max 28°C on Sat afternoon, min 24°C on Sat night). Winds decreasing (strong winds from the ENE on Sat night, light winds from the ENE by Mon morning). | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Tue morning, min 24°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | |||||||||||||||
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 10 | E 10 | E 10 | E 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | E 8 | ENE 7 | E 9 | NE 7 | NE 7 | NE 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 2726 | 2710 | 1634 | 736 | 497 | 355 | 259 | 199 | 172 | 159 | 151 | 140 | 197 | 192 | 153 | 117 | 131 | 55 | 102 | 132 | 96 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross |
High Tide | 4:12PM0.73m | 4:46AM0.57m | 4:28PM0.65m | 5:39AM0.56m | 4:37PM0.58m | 6:48AM0.54m | 4:30PM0.52m | 8:48AM0.54m | 11:15AM0.58m | 12:08PM0.64m | |||||||||||
Low Tide | 9:48AM0.11m | 10:40PM0.12m | 10:26AM0.22m | 11:05PM0.11m | 11:04AM0.32m | 11:30PM0.11m | 11:51AM0.42m | 11:59PM0.12m | 00:42AM0.14m | 2:05AM0.15m | 4:00AM0.14m | ||||||||||
 |  |  | | |  |  | | | | | | | |  | | | | | | | |
 | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — |
 | — | 6:54 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — |
mm | 6 | 1 | 25 | 6 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — |
Temp °C | 27 | 28 | 26 | 27 | 27 | 26 | 26 | 27 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 26 |
Feels °C | 25 | 26 | 21 | 28 | 29 | 28 | 27 | 28 | 26 | 27 | 27 | 25 | 28 | 27 | 26 | 28 | 29 | 27 | 29 | 30 | 29 |
Swell 1 Height (m) Direction Period (s) | NNW 8 | NNW 8 | W 13 | W 12 | W 12 | W 11 | W 11 | W 11 | E 9 | WSW 17 | WSW 18 | W 12 | NNE 7 | NNE 6 | WSW 16 | E 8 | WSW 18 | NNE 7 | NE 7 | E 8 | NE 7 |
| kJ | 7 | 7 | 13 | 11 | 11 | 10 | 10 | 10 | 15 | 28 | 30 | 12 | 9 | 14 | 26 | 72 | 30 | 40 | 102 | 22 | 96 |
Swell 2 Height (m) Direction Period (s) | W 11 | W 11 | NNW 9 | NNW 9 | NNW 8 | N 8 | N 8 | N 8 | W 11 | W 11 | W 13 | SW 18 | W 12 | W 12 | W 11 | NE 6 | W 11 | E 9 | E 8 | WSW 16 | ESE 8 |
| kJ | 9 | 10 | 7 | 7 | 7 | 5 | 1 | 1 | 9 | 2 | 14 | 12 | 11 | 11 | 10 | 40 | 9 | 55 | 34 | 26 | 22 |
Swell 3 Height (m) Direction Period (s) | W 15 | — | SW 16 | SW 10 | SW 9 | SW 6 | W 18 | W 19 | N 7 | W 13 | NW 10 | NW 11 | WSW 16 | WSW 16 | NW 10 | WSW 18 | NW 9 | NE 7 | WSW 17 | W 10 | WSW 16 |
| kJ | 4 | — | 10 | 4 | 3 | 1 | 6 | 7 | 1 | 3 | 4 | 5 | 27 | 27 | 4 | 30 | 3 | 27 | 28 | 2 | 25 |
Wind waves Height (m) Direction Period (s) | E 10 | E 10 | E 10 | E 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | E 8 | ENE 7 | — | — | NE 7 | E 3 |
| kJ | 2726 | 2710 | 1634 | 736 | 497 | 355 | 259 | 199 | 172 | 159 | 151 | 140 | 197 | 192 | 153 | 117 | 131 | — | — | 132 | 6 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 19 | 144 | 131 | 95 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 4 | 4 | 4 | 4 | 18 | 4 | 4 | 4 | 4 |
Best forecast wave conditions in Maui | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Kahului Harbor surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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.
Nearest