Kahului Harbor Surf Break

Lat Long: 20.90° N 156.48° W

Kahului Harbor Surf Forecast and Surf Report

Issued: 7 pm 31 Aug 2026 (local time)

Forecast update in  hr  min

Today's Kahului Harbor sea temperature is
26.8°C
0.1° 

Kahului Harbor surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Kahului Harbor surf forecast from 1 Sep 2026:

  • Most powerful swell: Sunday 6 Sep, 2AM (local time) - 7ft (2.1m), 13s period, ENE swell with 1,467 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 2.1m 13s and forecast to arrive on Sunday (Sep 06) at 2AM. 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 16s period and expected on Sunday (Sep 06) at 2PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 2AM (Sun 6th Sep)7ft (2.1m) 13s

Table - best surf conditions forecast for Kahului Harbor over the next 16 days.


The Lowdown

Alright, this is Rusty. Let's have a look at what's on the menu for the next couple of weeks.

To be straight with you, the surf outlook for the next 16 days is a bit of a tough one. We're looking at a long stretch of poor to marginal conditions, with a lot of cross-onshore and cross-shore winds messing things up. The first real hope doesn't pop up until the very end of the forecast. Water temperature is about average for this time of year, so nothing to worry about on that front.

Kicking things off, Tuesday the 1st is a write-off. Kahului Harbor is seeing a 6 ft swell from the ENE with a short period of 8 seconds, but the 12 mph cross-onshore wind is making it choppy and messy. The combined swell energy is weak (376), and it's just poor surf.

Wednesday the 2nd and Thursday the 3rd are not much better. The swell picks up a touch to 7 ft, but the wind stays strong out of the ENE at 16 mph, keeping it cross and choppy. The energy is moderate (579-489), but the quality just isn't there.

Friday the 4th is a weird one. The morning drops to a tiny 3 ft from the E, but the period jumps to 13 seconds, giving it a moderate energy (695). The wind is still messy though. Then the afternoon brings a 7 ft swell from the ENE, but the energy surges to a very strong (1365) and the cross-onshore wind ruins it.

The weekend of the 5th and 6th sees the swell staying around 7 ft from the ENE with a long 12-13 second period, meaning solid groundswell energy. The energy is strong (1061-1313). But again, the wind is cross-onshore, making it a choppy, lumpy mess. It's a marginal call at best. This setup, with strong wind and poor surf quality, looks more interesting for kite surfing than paddle surfing.

The start of the following week, Monday the 7th, is the best of a bad bunch. The swell is still 7-7 ft from the ENE with an 11-12 second period, and the wind drops to a light 6 mph breeze. The energy is still strong (1138-1224). It's still cross-onshore, but light enough that there might be a few clean ones if you're patient. It's marginally surfable, but nothing to write home about.

From Tuesday the 8th through to the 15th, it's a real struggle. The swell drops, the period is all over the place, and the wind is a constant problem. There are days with tiny 2 ft to 3 ft swells, and the energy is weak (162-179). It's a long, blank run of poor surf. For a spot like this, a quiet patch is pretty normal.

Now, for the one true standout. It's a long way off, but on Wednesday the 16th of September, something interesting happens. The morning brings a clean 3 ft swell from the NNW with a solid 12-second period, giving moderate energy (333). The wind is glassy, zero mph, from the NW. That's the good stuff. For Kahului Harbor, a reef break that handles this direction well, this could be a very clean, fun little session. The crowd factor is "sometimes," so you might have some company, but for a glassy morning at a working break, it's worth it. This is the one to circle on the calendar.

Keep an eye on the forecasts, as things can change.

Rusty.

Short Range Forecast

Some drizzle, heaviest during Tue night. Warm (max 27°C on Tue morning, min 25°C on Mon night). Wind will be generally light.

Days 5-7 Weather Summary

Some drizzle, heaviest during Sat afternoon. Warm (max 27°C on Fri morning, min 24°C on Fri night). Wind will be generally light.

Tuesday
1
Wednesday
2
Thursday
3
Friday
4
Saturday
5
Sunday
6
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
1
0
1
0
0
0
0
0
2
2
1
2
2
1
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.8
ENE
8
1.7
ENE
8
1.7
ENE
8
1.8
ENE
8
2
ENE
8
1.9
ENE
8
1.9
ENE
8
1.8
E
7
1.8
ENE
7
1.9
ENE
7
1
E
13
2
ENE
13
1.7
ENE
13
1.8
ENE
13
2
ENE
13
2.1
ENE
13
2
ENE
12
2
ENE
12
2
ENE
12
Wave Graph
Metric surfscale
Energy kJ
392
372
372
434
502
452
395
338
337
376
352
1359
1026
1041
1295
1467
1197
1127
1102
Wind (km/h)
20
ENE
20
NE
20
ENE
20
ENE
25
ENE
25
ENE
25
ENE
25
ENE
25
ENE
25
ENE
25
ENE
25
ENE
20
ENE
15
ENE
20
ENE
15
ENE
10
NE
15
NE
10
ENE
Wind State
cross-on
cross-on
cross-on
cross
cross
cross
cross
cross
cross
cross
cross
cross-on
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross
High Tide
5:09AM0.63m
4:00PM0.58m
6:16AM0.62m
3:55PM0.52m
8:03AM0.61m
10:22AM0.66m
11:33AM0.74m
12:17PM0.80m
11:18PM0.35m
Low Tide
10:28PM0.05m
10:40AM0.33m
10:59PM0.04m
11:36AM0.43m
11:38PM0.05m
00:37AM0.07m
2:20AM0.09m
4:07AM0.07m
7:43PM0.28m
part cloud
clear
clear
rain showers
clear
clear
clear
clear
clear
part cloud
part cloud
clear
clear
part cloud
rain showers
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:09
6:09
6:09
6:09
6:09
6:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:42
6:40
6:40
6:39
6:38
6:37
6:37
 mm
1
1
Temp °C
25
27
27
26
27
27
26
27
27
25
27
27
25
27
27
26
27
27
26
Feels °C
24
27
27
26
27
26
26
26
26
24
26
26
24
28
28
28
30
29
28
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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