Kahului Harbor Surf Break

Lat Long: 20.90° N 156.48° W

Kahului Harbor Surf Forecast and Surf Report

Issued: 1 am 04 Sep 2026 (local time)

Forecast update in  hr  min

Today's Kahului Harbor sea temperature is
26.8°C
0.0° 

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 4 Sep 2026:

  • Best quality surf: Monday 7 Sep, 5PM (local time) - 7ft (2.1m), 12s period, ENE swell with cross-offshore winds.
  • Most powerful swell: Monday 7 Sep, 8AM (local time) - 8ft (2.4m), 13s period, E swell with 1,932 kJ wave energy.
  • Next surfable swell (1★+): Monday 7 Sep, 5PM (local time) - 7ft (2.1m), 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 Monday (Sep 07) at 5PM. The primary swell is predicted to be 2.1m 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 13s and forecast to arrive on Monday (Sep 07) at 8AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 15s period and expected on Monday (Sep 07) at 5PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 5PM (Mon 7th Sep)7ft (2.1m) 12s
Best Surf 5PM (Mon 7th Sep)7ft (2.1m) 12s
Most Powerful 8AM (Mon 7th Sep)8ft (2.4m) 13s

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


The Lowdown

Alright folks, Rusty here. Let’s have a look at what’s coming up for Kahului Harbor.

Right off the bat, I gotta say, the next 16 days look like a bit of a mixed bag, and you’ll be waiting a few days for anything decent. The water temp is sitting at 80°, which is bang on average for this time of year, so no surprises there.

The first real chance to wet a line is not until Monday, the 7th. The morning is still a bit rough with a 8ft swell from the ENE, but the wind is a moderate cross-shore, so it’s pretty messy. However, Monday afternoon is where it starts to get interesting. The wind swings to a light cross-offshore from the ESE, cleaning things up nicely. You’ve got a 7ft swell from the ENE with a moderate 12-second period, and the combined energy is solid (1318). This is excellent surf for experienced surfers, but at over 8ft, it’s too big for beginners. The crowd factor is listed as “sometimes,” so you might have a few others out, but it’s worth the paddle.

Tuesday the 8th is the real standout. The morning is a special one with barely any wind (SE at 3 mph), swinging cross-offshore. The swell drops to a clean 6ft from the ENE, but the period is a solid 11 seconds, giving it some good shape. The energy is moderate (768), and the conditions are clean. The afternoon holds up too, with a light offshore breeze and a 5ft swell from the NE. This is the best on offer for the whole forecast – clean, shoulder-high waves and almost no wind. Get out there for it.

After Tuesday, things go downhill. From Wednesday the 9th onward, the onshore winds take over, and the swell mixes up with short periods. There’s a few days in the second week where the swell is over 7ft, but the wind is cross-onshore and the period is short (8-9 seconds), so it’s going to be lumpy and choppy. The energy is mostly moderate (500-1000 range), but the quality just isn’t there for a good paddle.

The very end of the run, from around the 17th to the 19th, the swell fades to under 5ft, and the wind stays onshore. It’s not looking like a finisher.

So, to sum it up: Monday afternoon the 7th is your best bet for bigger, powerful waves if you’ve got the skill, but Tuesday the 8th is the real gem – clean, smaller, and glassy. Don’t sleep on it.

Rusty.

Short Range Forecast

Light rain (total 5mm), mostly falling on Sun night. Warm (max 27°C on Fri morning, min 24°C on Fri night). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 2mm), mostly falling on Tue night. Warm (max 28°C on Mon morning, min 24°C on Wed night). Wind will be generally light.

Friday
4
Saturday
5
Sunday
6
Monday
7
Tuesday
8
Wednesday
9
Thursday
10
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
2
3
1
2
2
1
2
3
4
4
3
3
1
0
0
0
0
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.1
E
14
1.9
ENE
14
1.9
ENE
14
1.9
ENE
13
2.1
ENE
14
1.9
ENE
13
2.1
ENE
13
2
E
12
2.1
E
12
2.5
ENE
13
2.1
ENE
12
2
ENE
12
1.7
ENE
11
1.4
NE
10
0.8
E
14
0.8
E
13
0.8
E
13
1.5
ENE
7
1.4
ENE
7
1.4
ENE
8
1.6
ENE
12
Wave Graph
Metric surfscale
Energy kJ
439
1533
1428
1192
1519
1249
1323
1175
1290
1931
1310
1024
622
334
257
225
219
222
197
232
787
Wind (km/h)
25
ENE
20
NE
15
ENE
15
ENE
20
NE
15
ENE
15
ENE
20
ENE
20
ENE
20
E
15
ESE
15
S
5
SE
10
E
10
E
15
ENE
20
ENE
20
ENE
25
ENE
25
NE
20
ENE
Wind State
cross-on
cross-on
cross
cross
cross-on
cross
cross
cross-on
cross
cross
cross-off
off
cross-off
cross-off
cross
cross-on
cross-on
cross
cross
cross-on
cross
High Tide
10:22AM0.66m
11:33AM0.74m
12:17PM0.80m
11:18PM0.35m
12:51PM0.84m
00:17AM0.43m
1:22PM0.86m
1:02AM0.51m
1:49PM0.85m
1:44AM0.59m
2:14PM0.82m
2:23AM0.65m
Low Tide
2:20AM0.09m
4:07AM0.07m
7:43PM0.28m
5:19AM0.03m
7:44PM0.24m
6:13AM0.00m
7:57PM0.20m
6:59AM-0.01m
8:15PM0.16m
7:41AM0.02m
8:35PM0.11m
clear
clear
clear
clear
part cloud
part cloud
part cloud
thunderstorm
thunderstorm
part cloud
clear
clear
clear
part cloud
thunderstorm
clear
part cloud
rain showers
part cloud
clear
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:09
6:09
6:09
6:11
6:11
6:11
6:11
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:38
6:37
6:37
6:36
6:35
6:34
6:32
 mm
2
3
1
1
1
Temp °C
27
27
25
27
27
26
27
27
26
28
28
27
28
28
28
28
27
26
26
27
25
Feels °C
25
26
24
28
28
27
28
27
27
29
29
30
32
32
32
30
28
26
25
26
24
  • 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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