Surf Forecasts:
Kailua Beach surf forecast from 10 Aug 2026:
- Most powerful swell: Sunday 16 Aug, 5PM (local time) - 18ft (5.5m), 13s period, NE swell with 9,015 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 5.5m 13s and forecast to arrive on Sunday (Aug 16) at 5PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 13s period and expected on Sunday (Aug 16) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5PM (Sun 16th Aug) | 18ft (5.5m) 13s |
Table - best surf conditions forecast for Kailua Beach over the next 16 days.
The Lowdown
Alright, Rusty here. Let's talk about what's on the table for the upcoming stretch. It's been a bit quiet, so let's dive in.
First up, we're looking at a long dry spell. From now, right through the 16th of August, conditions are pretty grim. The swell is there, but the wind is relentless—stiff onshore breezes from the ENE just hammering the surface. The water's sitting at a nice 80°F, about what you'd expect for this time of year, but that's the only good news. For over a week, the wave energy is moderate at best (hitting up to 453 in the combined energy), but the chop and lump make it a write-off for a decent session.
Now, there is a glimmer. On Monday the 17th, things flip. The morning session at Kailua Beach looks like our one true standout. The wind goes completely glassy, with just a slight air, and we’ve got a 7ft groundswell rolling in from the ENE. That 9-second period means there's some energy behind it (combined energy of 616), and the shape should be clean. For a point break like Kailua, this is as good as it gets in this forecast window. The swell direction matches the spot's optimum, so expect some proper lines. Crowds are sometimes an issue here, so get in early.
After that morning window, it’s back to mediocrity. The afternoon of the 17th gets a bit of cross-offshore wind, but the swell drops off. From the 18th right through to the 24th, it's a recurring theme of onshore and cross-onshore winds, small to moderate swell, and poor surf conditions. The energy levels stay low (under 250 most of the time), and what waves there are will be messy.
If you’re a beginner, steer clear of the big pulse on the 15th and 16th—that stuff gets over 10ft, peaking at 18ft on the 16th afternoon. That’s expert territory, and even then, the cross-onshore wind is making it a choppy mess. Honestly, that setup looks more interesting for a kite surfer than a paddle surfer.
So, there you have it. One solid morning on Monday the 17th, then a whole lot of waiting.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Sun afternoon, min 25°C on Sun afternoon). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Thu morning, min 25°C on Wed afternoon). Mainly fresh winds. | |||||||||||||||||||
Sun 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | ||||||||||||||
PM | 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) | ENE 8 | ENE 7 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 10 | ENE 12 | ENE 13 | ENE 13 |
Wave Graph  | ||||||||||||||||||||
 kJ | 273 | 293 | 202 | 253 | 214 | 208 | 186 | 143 | 165 | 143 | 155 | 167 | 226 | 326 | 387 | 279 | 979 | 2160 | 3397 | 4536 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | on | on | cross-on | cross-on | on | cross-on | cross-on | on | on | on | on | on | on | on | on | on | on | on |
High Tide | 11:49PM0.42m | 1:59PM0.94m | 00:53AM0.47m | 2:32PM0.94m | 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 | |||||||
Low Tide | 8:36PM0.37m | 6:16AM0.03m | 8:52PM0.34m | 7:06AM0.01m | 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 | |||||||
 |  | | |  | | | |  | | | | | | | | | | |  | |
 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — |
 | 7:05 | — | — | 7:04 | — | — | 7:04 | — | — | 7:02 | — | — | 7:01 | — | — | 7:01 | — | — | 7:00 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 26 | 25 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 26 | 26 | 25 | 25 | 26 | 26 | 26 | 25 | 25 |
Feels °C | 26 | 25 | 27 | 26 | 26 | 26 | 26 | 24 | 25 | 23 | 23 | 24 | 24 | 23 | 22 | 24 | 24 | 24 | 23 | 24 |
Swell 1 Height (m) Direction Period (s) | NNW 11 | NNW 10 | NNW 9 | NNW 8 | NNW 8 | SSW 15 | SSW 14 | SSW 14 | S 18 | S 18 | S 16 | S 16 | S 15 | S 15 | S 14 | ESE 9 | S 14 | S 13 | S 13 | S 14 |
| kJ | 23 | 33 | 27 | 24 | 13 | 42 | 40 | 62 | 155 | 152 | 257 | 183 | 161 | 159 | 106 | 132 | 96 | 85 | 54 | 62 |
Swell 2 Height (m) Direction Period (s) | S 18 | NE 9 | SSW 16 | SSW 15 | SSW 15 | NNW 8 | NNW 7 | S 20 | SSW 13 | SSW 13 | NNW 7 | NNW 8 | NNW 8 | NNW 7 | NNW 7 | S 14 | NNW 9 | NNW 8 | NNW 8 | S 18 |
| kJ | 24 | 12 | 49 | 45 | 44 | 11 | 5 | 119 | 55 | 55 | 5 | 7 | 6 | 5 | 5 | 106 | 8 | 6 | 11 | 25 |
Swell 3 Height (m) Direction Period (s) | SSW 12 | S 16 | NE 8 | SSE 10 | SSE 9 | S 11 | SSE 9 | NNW 7 | NNW 7 | NNW 7 | SE 9 | S 9 | S 9 | — | S 11 | ESE 15 | S 17 | S 20 | S 16 | W 13 |
| kJ | 15 | 20 | 11 | 9 | 8 | 10 | 8 | 5 | 5 | 5 | 3 | 2 | 2 | — | 3 | 42 | 6 | 7 | 21 | 30 |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 7 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 10 | ENE 12 | ENE 13 | ENE 13 |
| kJ | 273 | 293 | 202 | 253 | 214 | 208 | 186 | 143 | 165 | 143 | 155 | 167 | 226 | 326 | 387 | 279 | 979 | 2160 | 3397 | 4536 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 41 | 41 | 41 | 41 | 17 | 41 | 41 | 17 | 41 | 122 | 41 | 41 | 122 | 41 | 43 | 50 | 41 | 41 | 81 | 16 |
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.
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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