Kailua Beach Surf Break

Lat Long: 21.41° N 157.74° W

Kailua Beach Surf Forecast and Surf Report

Issued: 7 am 28 Aug 2026 (local time)

Forecast update in  hr  min

Today's Kailua Beach sea temperature is
27.2°C
0.4° 

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 28 Aug 2026:

  • Most powerful swell: Friday 4 Sep, 8AM (local time) - 7ft (2.1m), 12s period, E swell with 1,290 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 2.1m 12s and forecast to arrive on Friday (Sep 04) at 8AM. 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 15s period and expected on Friday (Aug 28) at 11AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 8AM (Fri 4th Sep)7ft (2.1m) 12s

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


The Lowdown

Alright, Rusty here. Let’s have a look at what’s cookin’.

To be straight with you, this 16-day stretch for Kailua Beach is a rough one. The whole run is pretty much a write-off for a decent paddle session. The wind is locked in from the ENE almost the entire time, often a fresh breeze, and most of that is either blowing straight onshore or cross-onshore. That means lumpy, choppy, blown-out conditions. The water temp is sitting at 81° with a +0.7° anomaly, so pretty average for this time of year, nothing wild.

Right from the start on Friday the 28th of August, we’ve got 5ft of short-period, 6-second windswell from the ENE with the wind howling onshore at 19 mph. It’s a mess. The combined swell energy is only 239, so weak stuff that’s all wind chop. Saturday and Sunday don’t get any better – still that same short-period bump, still onshore or cross-onshore wind, and the energy climbs into the 300s, but that’s just more messy, weak wave energy.

We roll into Monday the 31st, still 7ft but period only 7-8 seconds, and the energy is pushing into the 400s, which is still fairly weak for that size. The wind isn’t letting up. By the start of September, things get a bit bigger – 8ft on the Tuesday morning, but it’s still that short-period windswell, and it’s still onshore. The energy jumps to 654, which is moderate, but the quality is just not there.

There’s a bit of a tease around Friday the 4th of September where the period jumps to 11-12 seconds, pushing the energy into the 1000s – that’s strong for a groundswell – with faces around 7-7ft. But here’s the kicker: the wind is still cross-onshore or onshore, and it’s still a fresh breeze. That’s a groundswell getting wrecked. For a point break like Kailua Beach, that longer period might have given some clean lines, but not in this wind.

From the 7th of September, the swell really starts cranking. We’re seeing 10ft on Monday, then 12ft on Tuesday, with energy in the 1000-1600 range. That’s proper strong wave energy, but the wind is still a strong breeze onshore at 25 mph. That’s blown-out, messy, and at that size, it’s only for experts anyway – and even they aren’t going to enjoy it. By Thursday the 10th, things get dangerous: gale-force winds of 43 mph from the ESE and SE, completely blowing it out or making it a cross-shore nightmare. That’s kite-surfing territory if anything, not for a paddle surfer.

The last couple of days, the 11th and 12th of September, the swell starts to drop back to 5ft and then 3ft, with the wind easing but still cross-onshore or cross. Energy drops back into the 200-300 range. Still not worth paddling out.

Look, there is no standout session in this whole 16-day run. It’s a blank stretch. For this area, a long onshore wind event like this does happen, and sometimes the forecast just locks in poor conditions. Keep an eye on it, because a shift in wind direction could turn this into something, but as it stands right now, give the board a rest.

Rusty.

Short Range Forecast

Some drizzle, heaviest during Sat night. Warm (max 26°C on Sat afternoon, min 25°C on Fri morning). Mainly fresh winds.

Days 4-6 Weather Summary

Moderate rain (total 11mm), heaviest on Mon morning. Warm (max 26°C on Mon afternoon, min 25°C on Mon morning). Mainly fresh winds.

Friday
28
Saturday
29
Sunday
30
Monday
31
Tuesday
1
Wednesday
2
Thursday
3
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)
1.5
ENE
6
1.4
ENE
6
1.6
ENE
6
1.7
ENE
6
1.8
ENE
6
2
ENE
7
1.8
ENE
7
2
ENE
7
2
ENE
7
2
ENE
7
2
ENE
8
2.2
ENE
8
2.3
ENE
8
2
ENE
8
1.9
ENE
8
1.7
ENE
8
1.7
ENE
8
1.8
ENE
7
1.8
ENE
8
1.7
ENE
8
1.2
ENE
12
Wave Graph
Metric surfscale
Energy kJ
161
122
195
219
244
394
325
372
383
423
471
566
654
513
476
372
372
333
424
357
421
Wind (km/h)
30
ENE
30
ENE
30
ENE
30
ENE
35
ENE
35
ENE
35
ENE
35
ENE
35
ENE
35
ENE
35
ENE
30
ENE
30
ENE
30
ENE
30
ENE
25
ENE
30
ENE
30
ENE
25
ENE
30
ENE
25
ENE
Wind State
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
on
cross-on
cross-on
on
on
on
on
cross-on
cross-on
cross-on
cross-on
on
on
on
High Tide
2:58PM0.81m
3:03AM0.63m
3:17PM0.77m
3:44AM0.66m
3:35PM0.72m
4:29AM0.68m
3:51PM0.67m
5:22AM0.68m
4:02PM0.61m
6:31AM0.67m
3:59PM0.56m
8:17AM0.68m
Low Tide
8:19AM0.14m
9:21PM0.22m
8:54AM0.19m
9:41PM0.18m
9:31AM0.26m
10:03PM0.15m
10:11AM0.34m
10:30PM0.13m
10:57AM0.42m
11:01PM0.13m
12:04PM0.50m
11:40PM0.13m
00:39AM0.15m
clear
part cloud
part cloud
part cloud
part cloud
rain showers
part cloud
clear
clear
rain showers
clear
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:13
6:13
6:13
6:13
6:13
6:13
6:13
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:50
6:50
6:49
6:47
6:46
6:45
6:45
 mm
1
1
1
2
1
1
2
1
2
Temp °C
25
25
25
25
26
25
26
26
25
25
26
25
26
26
26
26
26
25
25
26
25
Feels °C
23
23
23
22
24
23
24
23
22
23
24
22
25
25
25
26
25
24
23
24
23
  • 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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