Kailua Beach Surf Break

Lat Long: 21.41° N 157.74° W

Kailua Beach Surf Forecast and Surf Report

Issued: 1 pm 15 Aug 2026 (local time)

Forecast update in  hr  min

Today's Kailua Beach sea temperature is
27.2° C
0.5° 

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 16 Aug 2026:

  • Most powerful swell: Sunday 16 Aug, 2AM (local time) - 15ft (4.5m), 10s period, E swell with 3,370 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 4.5m 10s and forecast to arrive on Sunday (Aug 16) 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 1.1m 10s period and expected on Sunday (Aug 16) at 8AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 2AM (Sun 16th Aug)15ft (4.5m) 10s

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


The Lowdown

Alright, listen up. It’s Rusty here. Gotta be straight with you—this outlook is a tough one to write. We’re looking at a 16-day window for Kailua Beach, and the models are showing a whole lot of nothing for a long, long time.

The first recommendation doesn't even pop up until the 30th of August, and even then, it's a marginal call. That means we're talking about a solid stretch of poor surf and bad vibes for the next couple of weeks. With the trade winds howling out of the east-northeast and whipping up the ocean into a messy, cross-onshore chop, it’s just going to be a washing machine out there.

The water temp is sitting at a normal 81°F, which is about average for the time of year, so at least it won’t be cold while you’re getting blown off your board.

So, let’s break down the long grind ahead. This whole first stretch is a write-off. The swell is small, the wind is ruining what little is there, and the energy readings are weak. We're seeing combined energy values in the low hundreds—like 112 to 293—which tells you there's just no power in the water. The periods are short, mostly in that 6 to 8 second range, so it's all windswell and no push. It's not even worth paddling out.

The only blip of interest comes at the very end. On the morning of Sunday, the 30th, there’s finally a pulse of energy, coming from the east with a period of 15 seconds. That’s proper groundswell. The combined energy jumps to 1537, which is moderate but over four times stronger than anything we’ve seen. The wind is light and offshore, which will make it glassy and clean—a huge positive. This is the standout session if you’re willing to wait. The swell is around 6ft, which is solid, and it’s a point break, so it should handle that long-period energy well and line up nicely. It could be a bit tricky with the long period, but it's the only show in town.

The conditions improve slightly in the first week of September, with surf dropping back down and more of those moderate onshore breezes, so it doesn’t look like we’ll get another day like the 30th. Don't sleep on that Sunday morning; it's the one to chase. For everything else, keep the boards in the car and the wax in the bag.

Rusty

Short Range Forecast

Heavy rain (total 61mm), heaviest during Sun morning. Warm (max 26°C on Sat afternoon, min 24°C on Sun morning). Winds decreasing (near gales from the ENE on Sat night, moderate winds from the E by Sun night).

Days 5-7 Weather Summary

Mostly dry. Warm (max 26°C on Thu afternoon, min 24°C on Tue night). Wind will be generally light.

Sat
15
Sunday
16
Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
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
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
4
ENE
9
4.5
E
10
3
E
9
2.5
E
8
1.9
ENE
8
1.6
ENE
7
1.6
ENE
7
1.4
ENE
7
1.4
ENE
7
1.2
ENE
6
1.3
ENE
5
1
E
8
1.2
ENE
8
1.2
ENE
8
0.8
E
8
1.1
ENE
7
0.7
E
7
0.5
E
8
0.6
NNE
6
0.8
NE
7
Wave Graph
Metric surfscale
Energy kJ
2746
3370
1417
887
438
292
245
168
178
112
102
140
183
155
72
118
53
33
26
59
Wind (km/h)
55
ENE
50
E
35
E
25
E
20
E
25
ENE
25
ENE
25
ENE
25
ENE
20
ENE
20
ENE
15
E
15
ENE
20
ENE
15
ENE
15
NE
15
ENE
15
ENE
15
ENE
10
ENE
Wind State
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
on
on
on
on
on
on
on
cross-on
High Tide
4:13PM0.75m
4:57AM0.62m
4:27PM0.68m
5:52AM0.61m
4:33PM0.62m
7:01AM0.60m
4:19PM0.57m
8:55AM0.61m
11:13AM0.64m
12:09PM0.69m
Low Tide
10:47PM0.20m
10:29AM0.33m
11:11PM0.19m
11:08AM0.42m
11:37PM0.19m
11:57AM0.50m
00:07AM0.20m
00:51AM0.22m
2:10AM0.23m
3:54AM0.21m
thunderstorm
thunderstorm
thunderstorm
mod rain
thunderstorm
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
cloud
part cloud
clear
part cloud
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:09
6:09
6:09
6:09
6:09
6:11
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:00
7:00
6:59
6:59
6:58
6:57
6:55
 mm
2
10
36
9
4
Temp °C
26
26
25
26
25
25
25
25
25
25
25
25
25
25
25
26
25
25
26
26
Feels °C
22
21
23
26
25
25
25
24
25
24
25
26
26
27
26
28
27
27
28
29
  • 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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