Keaulanas Surf Break

Lat Long: 21.38° N 158.15° W

Keaulanas Surf Forecast and Surf Report

Issued: 1 am 02 Sep 2026 (local time)

Forecast update in  hr  min

Today's Keaulanas sea temperature is
27.2°C
0.3° 

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


Keaulanas surf forecast from 2 Sep 2026:

  • Best quality surf: Monday 7 Sep, 11AM (local time) - 5ft (1.6m), 12s period, SW swell with offshore winds.
  • Most powerful swell: Tuesday 8 Sep, 11AM (local time) - 11ft (3.5m), 14s period, SW swell with 5,413 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 2 Sep, 5AM (local time) - 3ft (0.9m), 16s 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 Wednesday (Sep 02) at 5AM. The primary swell is predicted to be 0.9m and 16s period with a secondary swell of 0.4m and 10s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Keaulanas in the next 16 days are 3.5m 14s and forecast to arrive on Tuesday (Sep 08) at 11AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 8s period and expected on Wednesday (Sep 02) at 2PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Wed 2nd Sep)3ft (0.9m) 16s
Best Surf11AM (Mon 7th Sep)5ft (1.6m) 12s
Most Powerful11AM (Tue 8th Sep)11ft (3.5m) 14s

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


The Lowdown

Alright, Rusty here, lookin’ at what we’ve got cookin’ for Keaulanas over the next couple of weeks.

Right now, we’re in a bit of a flat spell to start. Wednesday and Thursday morning both have some swell in the water, but the conditions are just plain poor or very marginal – you wouldn’t paddle out. The wind is clean on Thursday with a fresh offshore (19 mph), but the swell is tiny, barely 3 ft. Not worth the effort, honestly. Friday morning drops to zero swell, so that’s a write-off.

The first real signs of life show up on Saturday the 5th. We’ve got a clean 5 ft swell from the south with a 12-second period. The combined energy is moderate at 745, but the wind is a cross-off, so it won't be perfect. Still, it's the first thing that looks worth a peek, even if it’s just a "marginal" call. Sunday the 6th is similar – 5 to 5 ft of SSW swell, but with a risk of thunderstorms and cross-off winds. Not ideal.

Now, the first true standout is Monday the 7th of September. This is the one to circle. Early morning we’ve got light offshore winds (NE at 6 mph) and a solid 5 ft SW groundswell with a 12-second period. The combined energy is high (1309), which means there’s real power in the water. The report says "excellent surf conditions for experienced surfers," and I’m inclined to agree. The swell is getting a bit big for beginners (over 5 ft), but for the rest of you, this is clean, lined-up, and pumping. The water temp is 81°F, which is pretty much normal for this time of year, so no surprises there.

The next big one comes mid-week. Monday the 8th sees a very large SSW swell building, but conditions go downhill fast. We’re talking a big 12 ft SW groundswell with a 14-second period, but the wind switches to a strong cross-shore (SE 22 mph), making it lumpy and messy. The energy is huge (5907), but honestly, this setup looks better for a kite than a paddle. The period is long enough (over 11 seconds) that the reef and point aspects of Keaulanas could handle it, but the wind just kills it.

After that, the second week settles into smaller but cleaner surf. From Tuesday the 9th through to Thursday the 17th, we’re looking at waist- to chest-high swell (2 ft to 3 ft) with a mix of SSW and SW directions. The periods get really interesting – we see a 21-second swell on the 15th, which is very long-period groundswell. That will wrap perfectly into Keaulanas, delivering crisp, powerful lines, but you’ll have longer waits between sets. The winds are looking glassy or light offshore for a lot of these days, especially the mornings of the 12th, 13th, and 17th, with "glass" conditions. That’s the kind of clean you dream about.

Tuesday the 16th and Wednesday the 17th are another little standout in the second week. We’ve got 3 ft SSW groundswell with a 16 to 17-second period, and on the 17th, completely glassy winds. The energy is solid (654-682), and the reports say "very good surf conditions." It’s not huge, but it will be beautiful and clean. Keep an eye on that.

So, if you’re picking one day, Monday the 7th is your best bet for size and quality. For the glassy, long-period perfection later on, Wednesday the 17th is the sleeper hit.

Rusty.

Short Range Forecast

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

Days 4-6 Weather Summary

Light rain (total 7mm), mostly falling on Sun night. Warm (max 28°C on Sat afternoon, min 25°C on Sat morning). Wind will be generally light.

Wednesday
2
Thursday
3
Friday
4
Saturday
5
Sunday
6
Monday
7
Tuesday
8
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
0
1
1
0
0
1
3
2
2
2
2
2
3
4
3
3
3
2
4
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.9
S
16
0.9
S
16
0.8
S
15
0.8
S
14
0.7
S
14
0.5
S
14
1.2
SSE
12
1.1
S
11
1.4
S
12
1.5
S
12
1.5
S
12
1.6
SSW
12
1.5
SSW
12
1.6
SSW
12
1.6
SSW
11
1.6
SW
12
1.7
SW
13
2.3
SW
14
3.5
SW
14
3.5
SW
13
2.1
SSW
10
Wave Graph
Metric surfscale
Energy kJ
427
406
279
268
198
93
0
302
575
628
604
755
593
658
628
706
1011
2247
5413
3502
907
Wind (km/h)
25
ENE
25
ENE
30
ENE
30
ENE
30
ENE
25
ENE
30
ENE
30
ENE
25
ENE
20
ENE
25
ENE
15
ENE
15
ENE
20
E
15
E
10
NE
20
E
20
ESE
35
SE
30
SE
15
SE
Wind State
cross-off
cross-off
cross-off
off
off
off
off
off
off
cross-off
off
cross-off
cross-off
cross-off
cross-off
off
cross-off
cross-off
cross
cross
cross-off
High Tide
5:33PM0.31m
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
Low Tide
3:27PM0.30m
00:49AM0.08m
1:42AM0.09m
3:07AM0.10m
8:21PM0.17m
8:34PM0.14m
6:04AM0.09m
8:53PM0.12m
7:07AM0.08m
9:14PM0.10m
part cloud
clear
clear
part cloud
clear
part cloud
clear
clear
part cloud
clear
part cloud
part cloud
clear
thunderstorm
thunderstorm
light rain
part cloud
part cloud
part cloud
clear
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
6:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:47
6:46
6:45
6:45
6:44
6:43
6:42
 mm
1
3
3
Temp °C
27
28
25
27
27
25
26
27
25
27
28
26
27
28
26
25
28
27
28
28
27
Feels °C
26
27
23
25
24
23
24
25
23
26
27
26
28
28
26
28
29
28
27
27
28
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  • 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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