Kailua Beach Surf Break

Lat Long: 21.41° N 157.74° W

Kailua Beach Surf Forecast and Surf Report

Issued: 1 pm 17 Aug 2026 (local time)

Forecast update in  hr  min

Today's Kailua Beach sea temperature is
27.0° C
0.3° 

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 18 Aug 2026:

  • Best quality surf: Friday 21 Aug, 2AM (local time) - 2.5ft (0.8m), 7s period, E swell with glassy winds.
  • Most powerful swell: Monday 24 Aug, 8PM (local time) - 7.5ft (2.3m), 7s period, ENE swell with 557 kJ wave energy.
  • Next surfable swell (1★+): Friday 21 Aug, 2AM (local time) - 2.5ft (0.8m), 7s period with E swell.

Best Forecast Surf Conditions for Kailua Beach this week:

The surf forecast for Kailua Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Aug 21) at 2AM. The primary swell is predicted to be 0.8m and 7s period with a secondary swell of 0.7m and 7s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Kailua Beach in the next 16 days are 2.3m 7s and forecast to arrive on Monday (Aug 24) at 8PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 14s period and expected on Monday (Aug 17) at 5PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Fri 21st Aug)2.5ft (0.8m) 7s
Best Surf 2AM (Fri 21st Aug)2.5ft (0.8m) 7s
Most Powerful 8PM (Mon 24th Aug)7.5ft (2.3m) 7s

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


The Lowdown

Alright, this is Rusty comin’ at you from the beach.

Honestly, I gotta level with you straight up. Lookin’ at the next sixteen days for Kailua Beach, there isn’t a single session I’d recommend paddlin’ out for. The finder is givin’ me zero good options, and when I dig into the numbers, it makes sense. Kailua’s a point break that’s exposed to the swell, and while the water temp is a balmy 81°, which is pretty average for this time of year, that’s about the only nice thing I can say.

The whole pattern is a long, drawn-out stretch of poor surf conditions. It starts off with a risk of thunderstorms on Monday the 17th, with a messy 6ft cross-onshore ENE swell at a short 8 seconds. That’s weak energy (347) and it just looks lumpy. That vibe pretty much sticks with us. Tuesday the 18th through Thursday the 20th, we’re stuck with small, 2ft to 5ft swell, mostly cross-on or onshore winds, and periods under 8 seconds. The wave energy is laughable, dropping from 182 all the way down to 96. It’s just not worth your time.

We get a little bump in size heading into the second week, but the wind stays a problem. From around Monday the 24th of August through to the end of the month, the swell pushes up, hitting 10ft and even 12ft by the 27th, with strong to very strong energy (hitting 1719). But the direction is all wrong—stiff ENE winds, onshore or cross-onshore, and the period is still short, mostly 7 to 9 seconds. That much swell with that wind just makes for a nasty, blown-out mess. For a point break like Kailua, that’s more of a kite-surfing scenario than a paddle-surfing one.

Even as we roll into September 1st, it’s the same story: 7ft swell, but with 25 mph onshore winds. The water temp anomaly is only +0.5°, so nothing weird there, just standard warm water.

There are no standouts. No hidden gems. It’s a blank run, and for Kailua, which can be fairly consistent, this stretch of poor conditions is a real bummer. Sometimes the forecasts change, but right now, I’d save the wax for another day.

Rusty

Short Range Forecast

Mostly dry. Warm (max 25°C on Mon afternoon, min 24°C on Tue night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Warm (max 26°C on Fri afternoon, min 24°C on Thu night). Winds increasing (calm on Thu night, fresh winds from the ENE by Sat night).

Mon
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
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
1
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)
1.6
ENE
7
1.4
ENE
7
1.2
ENE
7
1.2
ENE
6
1.4
ENE
5
0.9
E
8
0.8
E
8
0.8
E
8
0.8
E
8
0.8
E
7
0.8
E
7
0.7
E
7
1.1
ENE
7
1.1
ENE
7
1.2
ENE
6
1.4
ENE
6
2
ENE
7
1.7
ENE
7
1.5
ENE
6
1.9
ENE
7
Wave Graph
Metric surfscale
Energy kJ
261
173
139
119
102
113
84
82
74
70
68
48
113
102
115
150
330
257
164
317
Wind (km/h)
20
ENE
25
ENE
20
ENE
20
ENE
25
E
15
ENE
15
NE
15
ENE
10
NE
15
NE
5
NE
10
E
15
E
20
ENE
20
ENE
30
ENE
30
ENE
30
ENE
30
NE
30
NE
Wind State
cross-on
cross-on
cross-on
on
cross-on
cross-on
on
on
on
on
glassy
cross-on
cross-on
cross-on
cross-on
on
cross-on
on
on
on
High Tide
4:33PM0.62m
7:01AM0.60m
4:19PM0.57m
8:55AM0.61m
11:13AM0.64m
12:09PM0.69m
12:42PM0.74m
9:57PM0.37m
1:10PM0.78m
11:42PM0.41m
Low Tide
11:37PM0.19m
11:57AM0.50m
00:07AM0.20m
00:51AM0.22m
2:10AM0.23m
3:54AM0.21m
9:32PM0.37m
5:06AM0.18m
8:28PM0.36m
clear
part cloud
part cloud
clear
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
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
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:59
6:59
6:58
6:57
6:55
6:54
6:54
 mm
1
Temp °C
25
25
25
25
25
24
25
25
25
25
25
25
26
26
26
26
25
25
25
25
Feels °C
25
25
24
24
24
24
26
27
27
27
27
28
28
29
27
26
25
24
23
23
  • Map Icons:
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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 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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