
Surf Forecasts:
Kahului Harbor surf forecast from 21 Jul 2026:
- Most powerful swell: Monday 27 Jul, 2PM (local time) - 5.5ft (1.7m), 14s period, E swell with 1,163 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 1.7m 14s and forecast to arrive on Monday (Jul 27) at 2PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 19s period and expected on Thursday (Jul 23) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2PM (Mon 27th Jul) | 5.5ft (1.7m) 14s |
Table - best surf conditions forecast for Kahului Harbor over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s chew the fat on the next couple of weeks. We’re looking at one spot, Kahului Harbor, and honestly, it’s a bit of a mixed bag. We’ve got some solid energy pulsing in, but the wind is the main story for most of the run. The water temp is sittin’ around 80°, which is about average for the time of year, nothing weird going on there.
The first week is pretty much a write-off, I ain’t gonna lie. There’s a real stretch of poor surf conditions from Tuesday the 21st of July all the way through to the end of the month. The trade winds are howling from the ENE and NE, mostly cross to cross-onshore, and that’s putting a real chop on the surface. The wave comment keeps saying “poor surf conditions” day after day. Even though the swell is there – it’s pushing 5ft to 6ft at times – the wind is just making it a mess. For a couple of days there, around the 26th, we get a taste of some serious energy, with combined swell energy readings of 1240 and 1370 (moderate to strong wave energy), and a very long period groundswell from the E at 16 seconds. That’s a lot of juice, but it’s hitting right into a moderate cross-onshore wind, so it’s messy and choppy. That long period will make it better for a point or reef, but the wind is killing it here.
Then, we get a bit of a tease. The morning of Thursday the 30th of July looks like the only real standout in the whole forecast. The wind drops right off, going glassy, with just a slight air from the NE at 3 mph. That’s a major positive. The swell is a clean 5ft from the NE with a period of 10 seconds, and combined energy of 517 (moderate). The wave comment says “expect very good surf conditions.” This is the one. If you can get out that morning, do it. The cross-on wind pops back up in the afternoon, so make it a dawn patrol mission. Keep in mind, this is an advanced reef break that’s consistent, but it can get crowded sometimes, so don’t expect to have it to yourself.
After that little window, it goes back into the wind-affected blender for the rest of the run. The early part of August sees a few days where the wind lightens up a bit, with the swell holding around 5ft to 7ft, but it’s still cross-onshore. The wave comment moves from “poor” to “marginal,” so it’s not completely hopeless, but it ain’t gonna be clean. The 4th of August looks like it might have some grunt with a 7ft ENE swell at 13 seconds and combined energy of 1238, but the light cross-onshore wind will still be a factor. Overall, it’s a tough fortnight. The one morning on the 30th is your best bet.
Rusty.
Short Range ForecastSome drizzle, heaviest during Tue morning. Warm (max 26°C on Tue morning, min 24°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Fri morning. Warm (max 26°C on Fri morning, min 23°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | |||||||||||||||
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 7 | E 7 | ENE 7 | ENE 7 | ENE 12 | E 12 | ENE 7 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | NE 8 | NE 8 | E 16 | E 16 | E 16 | E 15 | E 14 | E 14 | E 13 |
Wave Graph | |||||||||||||||||||||
136 | 87 | 147 | 137 | 512 | 177 | 195 | 195 | 220 | 263 | 301 | 319 | 344 | 298 | 483 | 935 | 1087 | 1006 | 919 | 1016 | 902 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross-on | 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-on |
High Tide | 10:04AM0.50m | 5:44PM0.49m | 11:40AM0.58m | 12:27PM0.64m | 1:01PM0.69m | 1:30PM0.73m | 11:19PM0.34m | 1:58PM0.77m | 00:18AM0.37m | 2:25PM0.80m | 1:02AM0.40m | ||||||||||
Low Tide | 2:16PM0.46m | 2:25AM0.11m | 3:23AM0.09m | 4:25AM0.06m | 5:21AM0.03m | 8:39PM0.32m | 6:07AM-0.01m | 8:45PM0.30m | 6:47AM-0.04m | 9:01PM0.27m | |||||||||||
5:54 | — | — | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | 5:58 | — | — | |
— | 7:07 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — | — | 7:06 | — | |
mm | 1 | — | — | — | — | — | — | — | — | 1 | — | — | — | — | 2 | 1 | — | — | — | — | — |
Temp °C | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 24 | 26 | 24 | 26 | 26 | 24 |
Feels °C | 27 | 27 | 26 | 26 | 26 | 25 | 25 | 25 | 24 | 25 | 25 | 25 | 26 | 25 | 25 | 24 | 25 | 23 | 26 | 25 | 24 |
Swell 1 Height (m) Direction Period (s) | E 11 | NE 7 | E 12 | E 11 | SW 18 | E 12 | E 11 | NNW 10 | ENE 10 | NNW 9 | E 16 | E 15 | E 14 | E 13 | E 16 | E 16 | E 16 | E 15 | E 14 | E 14 | E 13 |
23 | 55 | 103 | 123 | 12 | 177 | 119 | 9 | 34 | 8 | 45 | 71 | 102 | 85 | 483 | 935 | 1087 | 1006 | 919 | 1016 | 902 | |
Swell 2 Height (m) Direction Period (s) | E 15 | E 11 | SW 16 | SW 16 | SW 23 | NNW 11 | WSW 20 | WSW 20 | SW 18 | WSW 18 | SW 17 | WSW 16 | E 18 | E 17 | SW 18 | SW 17 | SSW 16 | SW 16 | SW 16 | SW 15 | NNE 8 |
38 | 39 | 10 | 10 | 21 | 11 | 38 | 37 | 50 | 31 | 47 | 26 | 25 | 86 | 49 | 45 | 25 | 10 | 10 | 8 | 171 | |
Swell 3 Height (m) Direction Period (s) | SW 17 | E 14 | W 11 | SW 24 | N 12 | WSW 18 | NNW 10 | SW 16 | NNW 9 | E 16 | NNW 8 | N 8 | SW 19 | SW 18 | SE 12 | — | — | — | S 15 | — | SE 10 |
11 | 58 | 2 | 22 | 3 | 30 | 10 | 10 | 8 | 21 | 7 | 1 | 15 | 51 | 5 | — | — | — | 4 | — | 4 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | E 7 | ENE 7 | ENE 7 | ENE 12 | ENE 6 | ENE 7 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 7 | NE 7 | NE 8 | — |
136 | 87 | 147 | 137 | 512 | 64 | 195 | 195 | 220 | 263 | 301 | 319 | 344 | 298 | 321 | 305 | 283 | 199 | 176 | 164 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 4 | 12 | 12 | 12 | 18 | 12 | 12 | 12 | 12 | 18 | 18 | 12 | 12 | 18 | 12 | 18 | 18 | 4 | 4 | 18 | 4 |
Best forecast wave conditions in Maui | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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.










