Surf Forecasts:
Kailua Beach surf forecast from 12 Aug 2026:
- Most powerful swell: Sunday 16 Aug, 11AM (local time) - 20ft (6.0m), 11s period, E swell with 7,961 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 6.0m 11s and forecast to arrive on Sunday (Aug 16) at 11AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 16s period and expected on Thursday (Aug 13) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11AM (Sun 16th Aug) | 20ft (6.0m) 11s |
Table - best surf conditions forecast for Kailua Beach over the next 16 days.
The Lowdown
Alright crew, Rusty here with the lowdown on Kailua Beach. Gotta be honest, the next couple of weeks are looking pretty grim for the most part. The wind is going to be a problem, and we’re getting the swell from the wrong direction. But there are a couple of tiny windows that might be worth a paddle.
The big picture is a long stretch of stiff onshore ENE winds that are going to chop everything up. The swell is coming from the ENE and NE, but this point needs it from the SW. So for the first week and a half, it’s mostly blown-out and messy. The water's about average for this time of year.
The first bit of hope shows up on the morning of Monday, August 24th. The wind goes glassy, completely dead, and we’ll see a small, clean groundswell from the east at about 3ft. The combined energy is moderate (101), which is just enough for a few soft rights. The real standout, though, is the Monday afternoon, August 24th. The wind is flat calm, glassy as a lake. The swell is 3ft from the east at 9 seconds, with a combined energy of 143. If you’ve got a longboard, this is your session. The waves will be tiny and weak, but it’ll be pure, clean, and beautiful.
There’s another brief moment on Tuesday, August 25th, in the afternoon when the wind goes glassy again, with a 3ft east swell. The energy is 135. It’s another clean window, but it won’t be any better than Monday.
The rest of the forecast is a bust. The wind comes back, the swell stays small, and the quality goes to crap. With the onshore winds, this point break isn’t a kite spot, but it’s definitely not a surfer’s paradise.
If you want to get wet, mark your calendar for Monday, August 24th. That’s the best we’ve got.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Tue night, min 25°C on Tue night). Mainly fresh winds. | Days 5-7 Weather SummaryHeavy rain (total 49mm), heaviest during Sat night. Warm (max 27°C on Sun afternoon, min 25°C on Fri night). Winds decreasing (gales from the ENE on Sat night, light winds from the E by Sun night). | ||||||||||||||||||
Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | ||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||
Wave Height (m) Direction Period (s) | E 7 | ENE 7 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 8 | E 8 | ENE 11 | ENE 11 | ENE 9 | E 11 | E 10 | E 8 | ENE 8 | ENE 8 | ENE 7 |
Wave Graph  | |||||||||||||||||||
 kJ | 192 | 152 | 153 | 188 | 167 | 219 | 335 | 387 | 561 | 795 | 1910 | 2130 | 1713 | 7961 | 2175 | 845 | 533 | 385 | 276 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | cross-on | on | on | on | on | on | on | on | on | cross-on | cross | cross | cross-on | cross-on | cross-on | on |
High Tide | 1:46AM0.51m | 3:03PM0.92m | 2:34AM0.55m | 3:30PM0.88m | 3:21AM0.59m | 3:54PM0.82m | 4:08AM0.61m | 4:13PM0.75m | 4:57AM0.62m | 4:27PM0.68m | 5:52AM0.61m | 4:33PM0.62m | |||||||
Low Tide | 9:13PM0.30m | 7:51AM0.03m | 9:36PM0.27m | 8:33AM0.07m | 9:59PM0.24m | 9:13AM0.15m | 10:23PM0.21m | 9:51AM0.24m | 10:47PM0.20m | 10:29AM0.33m | 11:11PM0.19m | 11:08AM0.42m | 11:37PM0.19m | ||||||
 |  | | |  | | | | |  |  | |  | | | | |  | | |
 | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — |
 | 7:04 | — | 7:02 | — | — | 7:01 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — |
mm | — | — | — | — | — | — | — | — | — | — | 2 | 2 | 29 | 8 | 5 | 1 | 1 | 1 | — |
Temp °C | 26 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 26 | 26 | 26 | 26 | 27 | 26 | 26 | 26 | 25 |
Feels °C | 25 | 23 | 23 | 24 | 24 | 24 | 24 | 23 | 24 | 23 | 24 | 23 | 23 | 24 | 26 | 27 | 28 | 27 | 24 |
Swell 1 Height (m) Direction Period (s) | SSW 14 | S 18 | S 18 | S 16 | S 16 | S 15 | S 15 | E 10 | S 14 | S 14 | S 13 | S 13 | S 14 | S 16 | S 13 | S 13 | S 14 | S 14 | S 13 |
| kJ | 62 | 155 | 152 | 257 | 183 | 161 | 159 | 65 | 106 | 97 | 55 | 54 | 62 | 84 | 53 | 55 | 66 | 65 | 55 |
Swell 2 Height (m) Direction Period (s) | S 20 | SSW 13 | SSW 13 | NW 7 | NNW 8 | NNW 8 | NNW 7 | S 14 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 9 | NNW 8 | S 16 | S 16 | SSE 6 | SSE 6 | N 7 |
| kJ | 119 | 55 | 55 | 2 | 7 | 6 | 5 | 106 | 6 | 6 | 6 | 14 | 16 | 6 | 46 | 45 | 7 | 3 | 1 |
Swell 3 Height (m) Direction Period (s) | NNW 7 | NNW 7 | NNW 7 | SE 9 | S 9 | S 9 | S 18 | NNW 8 | S 18 | SSW 17 | S 20 | S 16 | S 18 | SSW 19 | NNW 8 | N 8 | S 10 | N 8 | W 11 |
| kJ | 5 | 5 | 5 | 3 | 2 | 2 | 6 | 6 | 6 | 29 | 7 | 5 | 25 | 37 | 7 | 5 | 17 | 1 | 2 |
Wind waves Height (m) Direction Period (s) | E 7 | ENE 7 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 8 | E 8 | ENE 11 | ENE 11 | ENE 9 | E 11 | E 10 | E 8 | ENE 8 | ENE 8 | ENE 7 |
| kJ | 192 | 152 | 153 | 188 | 167 | 219 | 335 | 387 | 561 | 795 | 1910 | 2130 | 1713 | 7961 | 2175 | 845 | 533 | 385 | 276 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 41 | 41 | 46 | 41 | 41 | 122 | 42 | 50 | 152 | 206 | 206 | 206 | 206 | 146 | 44 | 16 | 41 | 41 | 41 |
Best forecast wave conditions in Oahu | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
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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.
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