Kailua Beach Surf Break

Lat Long: 21.41° N 157.74° W

Kailua Beach Surf Forecast and Surf Report

Issued: 1 pm 25 Aug 2026 (local time)

Forecast update in  hr  min

Today's Kailua Beach sea temperature is
27.3°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 26 Aug 2026:

  • Most powerful swell: Tuesday 1 Sep, 2AM (local time) - 6.5ft (2.0m), 8s period, ENE swell with 483 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 8s and forecast to arrive on Tuesday (Sep 01) at 2AM. Winds are predicted to be 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 (Tue 1st Sep)6.5ft (2.0m) 8s

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


The Lowdown

G’day, Rusty here. Look, I’ve got to be straight with you – this 16-day window is a tough one for Kailua Beach (Kailua-Beach). It’s a point break that likes a NE swell, and while we’ve got swell on the way, the wind is a bastard for most of it, keeping things messy. The water temp is sitting at a toasty 81°, which is pretty normal for this time of year, so no dramas there.

We kick things off Tuesday the 25th of August with a 6ft east swell, but it’s short period at 6 seconds and the wind is a fresh 19 mph cross-onshore. It’s lumpy, choppy, and just not worth paddling out for. The energy is weak, sitting at 235. That sets the tone for the whole first week, honestly. Wednesday through Sunday, it’s the same story: 5ft to 6ft east-northeast swell, period stuck between 6 and 7 seconds, and moderate to fresh onshore or cross-onshore winds. The combined energy climbs a bit, hitting 368 on the Saturday, but it’s still weak, and the surf is poor. This is a full week of no-go.

Moving into the second week, we hit Monday the 1st of September. The swell holds around 6ft to 6ft from the east-northeast, and the period finally stretches to 8 seconds on Tuesday morning. The energy is starting to build – it’s a moderate 419 on Tuesday morning – but the wind is still onshore, blowing 12 to 16 mph. The surf conditions are still flagged as poor. That keeps going through Thursday the 3rd, with the energy hitting a moderate 570 on the Thursday morning, but the 5ft east-northeast swell is still getting chopped up by a cross-onshore breeze.

Now, here’s where it gets interesting. On Friday the 4th of September, the swell drops right back to 3ft, but the period jumps to a very long 14 seconds from the east. The combined energy is a strong 526 – that’s groundswell quality. But the wind is still onshore at 16 mph, and the conditions are listed as poor. This is a classic case of a long-period groundswell, which can be great for a point break like Kailua Beach – it’ll give you better shaped waves and longer lulls between sets – but the onshore wind is going to spoil it. It stays that way into Saturday the 5th, with that long-period groundswell (13 seconds) and 5ft to 6ft swell, and the energy is very strong, hitting 868 on Saturday morning and peaking at 923 on Saturday afternoon. But again, the wind is onshore. Sunday the 6th is the same: 6ft at 13 seconds, very strong energy at 889, but onshore wind.

The last few days of the outlook, from Monday the 7th to Wednesday the 9th of September, see the swell drop back to 4ft to 5ft, the period shortening to 9-11 seconds, and the wind is cross-onshore or onshore, with the energy still moderate to strong. The conditions are poor to messy, with a risk of thunderstorms on the Monday and Tuesday.

Bottom line: there is no standout session in this entire 16-day period for Kailua Beach. The onshore wind is relentless, and even when the swell quality improves with a very long period groundswell, the wind kills it. If you had to pick the best of a bad lot, I’d keep an eye on Saturday the 5th of September. That 6ft, 13-second groundswell with very strong energy (923) has potential for that point, but it’s a gamble with the onshore breeze. For now, it’s a waiting game. The consistency is fairly consistent for the area, so it won’t stay poor forever, but this run is a blank one. Stay patient.

Rusty.

Short Range Forecast

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

Days 5-7 Weather Summary

Some drizzle, heaviest during Mon morning. Warm (max 25°C on Fri afternoon, min 25°C on Fri afternoon). Mainly fresh winds.

Tue
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
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)
1.6
E
7
1.5
E
7
1.5
E
6
1.4
ENE
6
1.5
E
6
1.4
ENE
6
1.4
ENE
6
1.3
ENE
6
1.3
ENE
6
1.4
ENE
6
1.6
ENE
6
1.7
ENE
6
1.7
ENE
7
1.8
ENE
7
1.7
ENE
7
1.9
ENE
7
1.9
ENE
7
1.8
ENE
7
1.6
ENE
7
2
ENE
8
Wave Graph
Metric surfscale
Energy kJ
264
217
178
160
176
131
155
130
134
142
225
226
240
295
270
320
320
290
257
483
Wind (km/h)
30
ENE
30
ENE
30
ENE
30
NE
30
ENE
30
ENE
25
ENE
30
ENE
30
ENE
30
ENE
30
ENE
35
ENE
30
ENE
25
ENE
30
ENE
30
ENE
25
ENE
35
ENE
30
ENE
25
ENE
Wind State
cross-on
cross-on
cross-on
on
cross-on
on
on
on
cross-on
on
cross-on
cross-on
on
cross-on
on
on
on
cross-on
on
on
High Tide
1:09AM0.50m
2:18PM0.84m
1:46AM0.54m
2:39PM0.83m
2:24AM0.59m
2:58PM0.81m
3:03AM0.63m
3:17PM0.77m
3:44AM0.66m
3:35PM0.72m
4:29AM0.68m
3:51PM0.67m
Low Tide
8:34PM0.32m
7:11AM0.10m
8:47PM0.29m
7:45AM0.11m
9:03PM0.26m
8:19AM0.14m
9:21PM0.22m
8:54AM0.19m
9:41PM0.18m
9:31AM0.26m
10:03PM0.15m
10:11AM0.34m
10:30PM0.13m
clear
clear
clear
clear
part cloud
rain showers
rain showers
part cloud
clear
clear
clear
clear
part cloud
part cloud
part cloud
clear
clear
rain showers
clear
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:11
6:11
6:13
6:13
6:13
6:13
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:52
6:52
6:51
6:50
6:50
6:49
6:47
 mm
1
1
1
1
Temp °C
26
26
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
Feels °C
24
25
22
22
23
24
24
24
24
23
23
22
22
22
22
24
23
23
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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