Kailua Beach Surf Break

Lat Long: 21.41° N 157.74° W

Kailua Beach Surf Forecast and Surf Report

Issued: 1 am 20 Aug 2026 (local time)

Forecast update in  hr  min

Today's Kailua Beach sea temperature is
26.8° C
0.1° 

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


Kailua Beach surf forecast from 20 Aug 2026:

  • Most powerful swell: Tuesday 25 Aug, 2PM (local time) - 6ft (1.9m), 7s period, E swell with 355 kJ wave energy.

Best Forecast Surf Conditions for Kailua Beach this week:

The most powerful waves expected at Kailua Beach in the next 16 days are 1.9m 7s and forecast to arrive on Tuesday (Aug 25) 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 0.5m 17s period and expected on Thursday (Aug 27) at 8AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 2PM (Tue 25th Aug)6ft (1.9m) 7s

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


The Lowdown

Alright, this is a tough one to call. I’ve been staring at the charts for Kailua Beach (Oahu) and honestly, for the next week and a half, it’s looking pretty grim. The whole 16-day window is a real mixed bag, but mostly just a bag of not-so-great.

Right off the bat, Thursday the 20th is a total write-off. We’re looking at a tiny 3-foot NE swell with a short, weak 7-second period and the wind is onshore. The water’s sitting at a warm 80°, which is pretty much normal for this time of year, but that’s the only nice thing I can say. The combined energy is a weak 128, so there’s just nothing to work with.

Friday the 21st through to the end of August is a long stretch of "poor surf conditions." The wind is constantly cross-onshore or onshore, sometimes a fresh breeze at 19 mph, which is going to chop everything up. The swell hangs around 3 to 6 feet, but it’s all short-period, wind-driven junk.

Then, around the 28th of August, the swell period starts to climb, hitting 16 seconds on the 28th morning and staying in the 14-16 second range for a few days. That’s proper groundswell, with the combined energy jumping up to 678 and even hitting 799 on the 30th afternoon. But the wind is still a problem – onshore and cross-onshore – so it’s going to be lumpy and messy. The swell is from the east, which is not the optimum direction for this point break, so it’s just not going to line up well.

The 31st of August and the 1st of September bring some serious size, with the swell hitting 8 feet, and the combined energy spiking massively to 1625 and 1477. But with the wind still onshore and the swell direction still not ideal, this is going to be a big, blown-out mess. It’s too big for beginners, and even for the experts, the conditions will be challenging.

Finally, there’s a tiny glimmer on the 3rd of September. The Thursday afternoon shows a cross-offshore wind from the SSE, light at 9 mph, and the wave comment says "clean." The swell is a modest 4 feet from the ENE with an 8-second period, and the combined energy is 295. It’s not going to be epic, but it’s the only clean session in the whole run. The Friday the 4th morning then goes back to cross-on and poor conditions.

So, the standout window, if you’re desperate, is the afternoon of Thursday the 3rd of September. The wind will be clean, and you’ll find some small, rideable waves at Kailua Beach. The rest of the 16 days? Honestly, the setup looks more interesting for a kite session than paddle surfing, given the consistent onshore winds and the lumpy, choppy conditions. A long, blank run like this is pretty normal for the area when the wind doesn’t play ball.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 27°C on Fri afternoon, min 25°C on Thu morning). Winds increasing (light winds from the ENE on Thu night, fresh winds from the ENE by Sat night).

Days 4-6 Weather Summary

Light rain (total 2mm), mostly falling on Mon night. Warm (max 26°C on Mon morning, min 25°C on Sun morning). Mainly fresh winds.

Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
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
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
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
NE
7
1.2
ENE
7
0.8
ENE
7
1
ENE
7
1.2
ENE
7
1.2
ENE
7
1.4
ENE
7
1.7
E
6
1.9
E
7
1.9
ENE
7
1.9
ENE
6
1.8
ENE
6
1.7
ENE
6
1.6
ENE
6
1.8
E
6
1.8
E
7
1.8
E
7
1.6
ENE
7
1.4
ENE
6
1.4
ENE
6
1.4
ENE
6
Wave Graph
Metric surfscale
Energy kJ
73
138
71
99
136
135
175
239
335
342
280
252
223
186
255
329
329
225
135
122
150
Wind (km/h)
10
ENE
15
NE
5
E
10
E
15
E
20
E
30
ENE
35
ENE
35
ENE
40
ENE
35
ENE
35
ENE
35
ENE
30
ENE
30
E
30
ENE
30
ENE
25
ENE
25
ENE
20
ENE
20
ENE
Wind State
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
on
on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
on
High Tide
11:13AM0.64m
12:09PM0.69m
12:42PM0.74m
9:57PM0.37m
1:10PM0.78m
11:42PM0.41m
1:34PM0.81m
00:29AM0.45m
1:57PM0.83m
1:09AM0.50m
2:18PM0.84m
1:46AM0.54m
Low Tide
2:10AM0.23m
3:54AM0.21m
9:32PM0.37m
5:06AM0.18m
8:28PM0.36m
5:55AM0.14m
8:26PM0.35m
6:35AM0.11m
8:34PM0.32m
7:11AM0.10m
8:47PM0.29m
clear
clear
clear
clear
part cloud
clear
clear
clear
part cloud
part cloud
clear
part cloud
part cloud
part cloud
thunderstorm
thunderstorm
part cloud
part cloud
part cloud
cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:09
6:11
6:11
6:11
6:11
6:11
6:11
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:57
6:55
6:54
6:54
6:53
6:52
6:52
 mm
1
1
Temp °C
26
26
26
26
27
27
26
26
25
25
25
25
26
26
26
25
26
25
25
25
25
Feels °C
29
28
29
29
29
30
27
25
24
23
23
23
25
25
25
24
25
24
24
25
25
  • 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 Kailua Beach Surf forecast

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

Kailua Beach is 0 km (0 miles) from Kailua. If you plan a vacation in Oahu, look for hotels and other accommodation in Kailua. Kailua has rooms for a wide range of budgets as well as car hire and transport links.

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