Kailua Beach Surf Break

Lat Long: 21.41° N 157.74° W

Kailua Beach Surf Forecast and Surf Report

Issued: 7 am 21 Aug 2026 (local time)

Forecast update in  hr  min

Today's Kailua Beach sea temperature is
26.9° C
0.2° 

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 21 Aug 2026:

  • Most powerful swell: Sunday 23 Aug, 2AM (local time) - 6.5ft (2.0m), 7s period, E swell with 393 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 2.0m 7s and forecast to arrive on Sunday (Aug 23) 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 0.6m 17s period and expected on Thursday (Aug 27) at 11AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 2AM (Sun 23rd Aug)6.5ft (2.0m) 7s

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


The Lowdown

Alright, Rusty here. Let’s take a look at what’s cookin’ for Kailua Beach over the next couple weeks.

Honestly, the pattern from now through the first week of September is pretty grim. You can basically write off the entire stretch from Friday the 21st all the way through the first few days of September – nothing worth paddling out for. The wind is locked in from the east and east-northeast, blowing cross-onshore at 15 to 22 mph, sometimes stronger. That onshore breeze is just wrecking any chance of clean surf. The swell stays small to moderate, around 4 ft to 6 ft, but it’s short-period (6 to 7 seconds), so it’s weak and disorganised. The water temp at Kailua Beach is about 80°F with a tiny anomaly of about 0.4°F, so pretty much normal for this time of year.

Around Friday the 28th of August, the swell drops right off – only 3 ft – but the period jumps to a very long 14 seconds. That’s groundswell coming from the east, but the wind is still onshore and on, making it look useless. Energy readings are strong, but it’s all wasted.

Into the end of the month and early September, we start seeing a much bigger swell pulse, but it’s still accompanied by messy wind. By Monday the 31st of August, the swell hits 10 ft to 12 ft with 10 to 11 second periods – that’s very strong energy – but the wind is onshore and fresh, and the wave comments are still poor. At height over 8 ft and onshore, this is expert-only territory, and even then it’s not going to be clean. The wind stays strong (25-28 mph) into September 1st, occasionally shifting offshore a touch, but the surf quality is still noted as poor.

From September 2nd onward, the swell drops back to 6 ft to 7 ft, period shortens to 8-9 seconds, and there’s a risk of thunderstorms. Still cross-onshore or cross-shore wind, still poor conditions.

All in all, this region has been dealt a rough hand. There’s quite a run of 16 days here with no good surf on offer. Kailua Beach is exposed to swell from the NE, which is the optimum direction, but the wind never plays ball. The setup looks more interesting for kite surfers than paddle surfers given the strong onshore wind and lumpy conditions. If you’ve got to be in the water, just keep an eye on the forecasts—things can flip, but right now it’s a long, poor stretch.

Rusty.

Short Range Forecast

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

Days 4-6 Weather Summary

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

Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Thursday
27
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)
1.1
NE
7
1.2
ENE
7
1.5
ENE
7
1.5
E
7
1.7
E
7
2
E
7
1.9
ENE
7
1.7
ENE
6
1.7
E
6
1.5
ENE
6
1.6
ENE
6
1.7
E
6
1.8
E
7
1.7
E
7
1.7
ENE
6
1.6
ENE
6
1.4
ENE
6
1.4
ENE
6
1.1
ENE
7
1.2
ENE
5
0.5
E
16
Wave Graph
Metric surfscale
Energy kJ
109
127
181
212
278
393
352
245
225
135
198
239
311
270
253
218
153
135
114
72
127
Wind (km/h)
10
E
15
ENE
20
E
35
ENE
35
ENE
35
ENE
35
ENE
30
ENE
30
ENE
30
ENE
30
ENE
30
ENE
30
ENE
30
ENE
30
ENE
30
ENE
30
ENE
25
ENE
30
E
25
ENE
25
ENE
Wind State
cross-on
cross-on
cross-on
cross-on
on
cross-on
cross-on
on
on
cross-on
on
cross-on
cross-on
cross-on
cross-on
cross-on
on
cross-on
cross-on
on
cross-on
High Tide
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
2:39PM0.83m
2:24AM0.59m
Low Tide
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
7:45AM0.11m
9:03PM0.26m
clear
part cloud
clear
part cloud
part cloud
part cloud
part cloud
clear
part cloud
rain showers
part cloud
part cloud
part cloud
part cloud
part cloud
cloud
part cloud
rain showers
rain showers
rain showers
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:11
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>
6:55
6:54
6:54
6:53
6:52
6:52
6:51
 mm
1
1
1
1
Temp °C
26
27
26
26
26
25
25
26
25
26
26
26
26
26
25
25
25
25
25
25
25
Feels °C
30
30
28
26
26
23
23
25
24
25
26
26
25
25
24
22
24
23
25
24
24
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 
submit an eyeball surf report

Quick surf report for Kailua Beach:

join our community of surf reporters

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Kailua Beach surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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.

Nearest locationNearest