Keaulanas Surf Break

Lat Long: 21.38° N 158.15° W

Keaulanas Surf Forecast and Surf Report

Issued: 1 am 03 Sep 2026 (local time)

Forecast update in  hr  min

Today's Keaulanas sea temperature is
27.2°C
0.2° 

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


Keaulanas surf forecast from 3 Sep 2026:

  • Best quality surf: Monday 7 Sep, 5PM (local time) - 23ft (7.0m), 15s period, SSW swell with cross-offshore winds.
  • Most powerful swell: Monday 7 Sep, 8PM (local time) - 26ft (8.0m), 14s period, SSW swell with 26,279 kJ wave energy.
  • Next surfable swell (1★+): Saturday 5 Sep, 5AM (local time) - 4.5ft (1.3m), 12s period with S swell.

Best Forecast Surf Conditions for Keaulanas this week:

The surf forecast for Keaulanas over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Sep 05) at 5AM. The primary swell is predicted to be 1.3m and 12s period. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Keaulanas in the next 16 days are 8.0m 14s and forecast to arrive on Monday (Sep 07) 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 1.6m 7s period and expected on Monday (Sep 07) at 11AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Sat 5th Sep)4.5ft (1.3m) 12s
Best Surf 5PM (Mon 7th Sep)23ft (7.0m) 15s
Most Powerful 8PM (Mon 7th Sep)26ft (8.0m) 14s

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


The Lowdown

Alright, Rusty here, let's talk about what's on offer for the coming weeks.

Right off the bat, we're looking at a bit of a slow start. The first few days are pretty marginal, with some small swell and a fresh breeze, but don't write it off just yet. The real action starts to build towards the end of the first week and into the second, and there are a couple of days that are going to be absolute crackers.

Let's start with Keaulanas. It's a consistent beach and reef set-up that's exposed to the swell. The water temperature is sitting at 81°, which is bang on average for this time of year, so no surprises there.

The first real glimmer of hope comes on the morning of Sunday the 6th. The swell is picking up to 5ft from the SSW with a solid 14-second period, giving a combined energy of (1385). It's a moderate energy, but the wind is light and it's clean. The afternoon sees it jump to 7ft, which is getting a bit more serious, but still manageable.

Now, Monday the 7th is where things get a bit wild. The morning has an 12ft SSW groundswell with a 15-second period, and the energy is absolutely pumping at (5007). That's a lot of water moving. The afternoon is a beast, but it's too big for this break. A 23ft swell with energy hitting (20549) is just insane. This is expert-only territory, and even then, it's probably more of a spectator sport than a paddle session. The wind is howling too, so it's not going to be clean.

Things settle down quickly after that, but the real standout, the one you want to circle on your calendar, is the window from the morning of Monday the 14th through to the morning of Thursday the 17th. This is the best run of the forecast.

The morning of Monday the 14th is flat out beautiful. Glassy conditions, a 1ft swell from the SW with a ridiculously long 25-second period. The energy is moderate (239), but that period means quality. The afternoon is even better, with a 2ft swell from the SW, a 23-second period, and glassy conditions – the energy jumps to (529). This is going to be clean, long lines. Tuesday the 15th is more of the same: glassy, 3ft to 4ft from the SW with 21 to 20-second periods. The energy is getting up there (927 to 975). This is the pick of the whole forecast. If you can get out there, you'll be in for a treat.

The rest of the second week sees a steady 3ft to 4ft SSW/SW swell, with good clean conditions and light winds. It's consistent and good, but that window from the 14th to the 17th is the one to chase.

So, bottom line: wait for the big stuff to pass on the 7th, then get ready for some absolutely pristine, glassy groundswell from the 14th onwards. That's where the magic is.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 28°C on Sat afternoon, min 25°C on Thu night). Mainly fresh winds.

Days 4-6 Weather Summary

Heavy rain (total 27mm), heaviest during Sun afternoon. Warm (max 28°C on Sun morning, min 24°C on Sun night). Winds decreasing (near gales from the SE on Mon night, calm by Tue night).

Thursday
3
Friday
4
Saturday
5
Sunday
6
Monday
7
Tuesday
8
Wednesday
9
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
0
2
1
2
2
2
2
3
3
2
4
!
0
0
1
3
3
2
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.8
S
14
0.7
S
14
0.5
S
13
1.3
S
12
1.2
S
12
1.3
S
12
1.4
S
12
1.5
S
12
1.7
SSW
12
1.4
SSW
14
2.1
SSW
13
2.5
SSW
14
3.5
SSW
15
7
SSW
15
4.5
SW
10
1.9
S
9
1
SSW
15
0.9
SSW
14
0.9
SSW
14
0.9
SSW
13
0.7
SSW
13
Wave Graph
Metric surfscale
Energy kJ
268
195
92
522
439
472
553
628
876
735
1511
2673
4986
20521
4250
619
456
356
273
257
176
Wind (km/h)
30
ENE
30
ENE
25
ENE
30
ENE
30
ENE
20
ENE
20
ENE
25
ENE
15
ENE
15
E
15
ESE
30
ENE
35
E
45
ESE
45
S
25
SSW
10
SSW
5
ESE
0
NE
15
ENE
20
ENE
Wind State
off
cross-off
off
off
off
cross-off
cross-off
off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-on
cross-on
cross-on
glassy
glassy
off
off
High Tide
9:21AM0.60m
10:46AM0.63m
11:57AM0.67m
11:47PM0.20m
12:52PM0.70m
1:00AM0.25m
1:38PM0.72m
1:50AM0.31m
2:17PM0.71m
2:34AM0.38m
2:53PM0.68m
3:15AM0.44m
Low Tide
1:42AM0.09m
3:07AM0.10m
8:21PM0.17m
8:34PM0.14m
6:04AM0.09m
8:53PM0.12m
7:07AM0.08m
9:14PM0.10m
8:03AM0.08m
9:35PM0.09m
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
rain showers
thunderstorm
mod rain
thunderstorm
thunderstorm
thunderstorm
thunderstorm
clear
clear
rain showers
rain showers
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:16
6:16
6:16
6:16
6:16
6:16
6:18
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:46
6:45
6:45
6:44
6:43
6:42
6:40
 mm
1
5
8
2
1
8
2
1
2
Temp °C
27
27
25
27
27
25
27
28
26
28
28
25
27
28
27
27
28
27
28
28
26
Feels °C
26
24
22
24
24
23
27
28
26
29
28
24
26
26
23
27
30
31
33
31
26
  • 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 Keaulanas Surf forecast

The above surf forecast table for Keaulanas provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Keaulanas can be found by selecting the local surf guide option on the grey menu. Our Keaulanas 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 (Keaulanas) 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 Keaulanas 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.

Keaulanas is 7 km (4 miles) from Makakilo City. If you plan a vacation in Oahu, look for hotels and other accommodation in Makakilo City. Makakilo City has rooms for a wide range of budgets as well as car hire and transport links.

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