Surf Forecasts:
Kailua Beach surf forecast from 13 Aug 2026:
- Most powerful swell: Sunday 16 Aug, 2AM (local time) - 13ft (4.0m), 9s period, E swell with 2,351 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 4.0m 9s 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 1.0m 10s period and expected on Sunday (Aug 16) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Sun 16th Aug) | 13ft (4.0m) 9s |
Table - best surf conditions forecast for Kailua Beach over the next 16 days.
The Lowdown
G’day, I’m Rusty. Right, let’s talk about Kailua Beach.
Straight up, this is a tough stretch for the next couple of weeks. There’s plenty of swell in the water, but the onshore and cross-onshore wind is relentless, making it a messy, blown-out affair. It’s one of those periods where you’d be better off waiting for a change. The combined swell energy jumps from moderate up to strong, but the quality just isn’t there.
From Thursday morning (13th August) the wind is roaring 19 mph straight onshore from the ENE, and the swell is 5 ft with a short period of 6 seconds. It’s a poor surf call, and by the afternoon it’s still onshore, 19 mph, with a 6 ft bump. Thursday clears out but the wind doesn't. Friday morning (14th) is worse – 22 mph onshore wind, 7 ft swell, and the energy is building. The whole weekend is a write-off. Saturday (15th) sees 10 ft swell and 28 mph onshore wind from the ENE – way too much power for most. Sunday (16th) has storm risk and 28 mph wind again, with 10 ft swell. The water temp is about average for this time of year, nothing weird.
Monday (17th) starts to ease a touch but remains cross-onshore and lumpy. The swell drops to 6 ft on Monday morning, then 5 ft in the afternoon, with a 6-7 second period. This pattern continues through the week. The second week doesn’t offer much hope. From Thursday 20th through to Sunday 24th, the wind stays cross-onshore or onshore from the ENE/E, with swell ranging from 3 ft to 5 ft. The energy is still moderate to strong. Late in the outlook, on Friday 28th August, the swell picks up to 6 ft with an ENE swell and fresh cross-onshore wind, keeping things ragged.
Look, there are no standout sessions here. The best wave shape might come when the swell is smaller and the wind eases, like on Wednesday afternoon (19th) when we see a cleaner 3 ft NNE swell and a gentle 9 mph onshore breeze – but that’s tiny and still not clean. Sunday (23rd) later in the run has 5 ft from the east with a 7-8 second period, but the cross-onshore makes it choppy. The direction is wrong too – Kailua Beach wants NE swell, but most of this run is ENE or E.
If you’re a kite surfer, this is your window. The strong, consistent onshore wind and decent swell make it a much better call for the kite than a paddle. For a surfer, I’d be patient. The forecast can turn, but right now the blank run looks pretty normal for this stretch.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Fri night. Warm (max 26°C on Thu morning, min 25°C on Thu night). Mainly strong winds. | Days 4-6 Weather SummaryModerate rain (total 11mm), heaviest on Sun afternoon. Warm (max 26°C on Sun afternoon, min 25°C on Sun morning). Winds decreasing (strong winds from the ENE on Sun morning, moderate winds from the ENE by Tue night). | ||||||||||||||||||||
Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | |||||||||||||||
AM | 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 6 | ENE 6 | E 7 | ENE 8 | ENE 8 | ENE 8 | E 9 | E 9 | E 9 | E 9 | E 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 8 | ENE 6 | ENE 8 | E 8 | NE 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 175 | 244 | 478 | 540 | 569 | 936 | 1446 | 1747 | 2351 | 1615 | 924 | 494 | 365 | 222 | 193 | 104 | 147 | 102 | 170 | 82 | 86 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | on | on | 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 |
High Tide | 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 | 7:01AM0.60m | 4:19PM0.57m | 8:55AM0.61m | |||||||||
Low Tide | 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 | 11:57AM0.50m | 00:07AM0.20m | 00:51AM0.22m | ||||||||
 | |  | | |  |  |  |  | | |  | | | | | | | | | | |
 | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — |
 | — | 7:01 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — | — | 6:59 | — | — | 6:58 | — |
mm | — | — | — | — | — | 2 | — | 1 | — | 1 | 3 | 7 | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 25 | 26 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 25 | 25 |
Feels °C | 24 | 24 | 23 | 21 | 24 | 24 | 23 | 23 | 23 | 22 | 24 | 24 | 24 | 23 | 23 | 24 | 25 | 24 | 25 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | S 16 | S 15 | S 15 | S 14 | S 14 | S 14 | S 13 | S 13 | S 14 | SSE 12 | S 10 | S 7 | S 14 | S 14 | S 13 | S 13 | S 13 | S 13 | S 12 | E 8 | E 8 |
| kJ | 183 | 161 | 159 | 107 | 102 | 62 | 55 | 54 | 62 | 125 | 212 | 39 | 103 | 65 | 55 | 30 | 30 | 29 | 11 | 82 | 46 |
Swell 2 Height (m) Direction Period (s) | NNW 8 | NNW 8 | NNW 7 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 9 | S 16 | S 16 | S 14 | SSE 6 | SSE 6 | E 9 | NE 8 | SSE 7 | SSE 9 | SSE 9 | S 12 | S 12 |
| kJ | 7 | 6 | 5 | 6 | 6 | 6 | 6 | 6 | 8 | 46 | 46 | 62 | 8 | 3 | 15 | 17 | 4 | 8 | 7 | 11 | 11 |
Swell 3 Height (m) Direction Period (s) | S 9 | — | — | — | S 18 | SSW 17 | N 9 | S 16 | S 18 | S 13 | N 8 | S 16 | N 8 | N 7 | S 5 | SW 17 | SW 18 | SW 18 | SW 16 | SSE 9 | SSE 9 |
| kJ | 2 | — | — | — | 6 | 29 | 2 | 5 | 25 | 13 | 5 | 20 | 4 | 1 | 1 | 11 | 12 | 12 | 10 | 8 | 8 |
Wind waves Height (m) Direction Period (s) | ENE 6 | ENE 6 | E 7 | ENE 8 | ENE 8 | ENE 8 | E 9 | E 9 | E 9 | E 9 | E 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 8 | ENE 6 | ENE 8 | NE 7 | NE 7 |
| kJ | 175 | 244 | 478 | 540 | 569 | 936 | 1446 | 1747 | 2351 | 1615 | 924 | 494 | 365 | 222 | 193 | 104 | 147 | 102 | 170 | 71 | 86 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 50 | 50 | 42 | 50 | 123 | 206 | 152 | 152 | 144 | 126 | 52 | 41 | 46 | 46 | 41 | 41 | 41 | 17 | 17 | 17 | 17 |
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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