Surf Forecasts:
Kailua Beach surf forecast from 18 Aug 2026:
- Best quality surf: Friday 21 Aug, 2AM (local time) - 2.5ft (0.8m), 7s period, E swell with glassy winds.
- Most powerful swell: Monday 24 Aug, 8PM (local time) - 7.5ft (2.3m), 7s period, ENE swell with 557 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 2AM (local time) - 2.5ft (0.8m), 7s period with E swell.
Best Forecast Surf Conditions for Kailua Beach this week:
The surf forecast for Kailua Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Aug 21) at 2AM. The primary swell is predicted to be 0.8m and 7s period with a secondary swell of 0.7m and 7s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Kailua Beach in the next 16 days are 2.3m 7s and forecast to arrive on Monday (Aug 24) at 8PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 14s period and expected on Monday (Aug 17) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Fri 21st Aug) | 2.5ft (0.8m) 7s |
| Best Surf | 2AM (Fri 21st Aug) | 2.5ft (0.8m) 7s |
| Most Powerful | 8PM (Mon 24th Aug) | 7.5ft (2.3m) 7s |
Table - best surf conditions forecast for Kailua Beach over the next 16 days.
The Lowdown
Alright, this is Rusty comin’ at you from the beach.
Honestly, I gotta level with you straight up. Lookin’ at the next sixteen days for Kailua Beach, there isn’t a single session I’d recommend paddlin’ out for. The finder is givin’ me zero good options, and when I dig into the numbers, it makes sense. Kailua’s a point break that’s exposed to the swell, and while the water temp is a balmy 81°, which is pretty average for this time of year, that’s about the only nice thing I can say.
The whole pattern is a long, drawn-out stretch of poor surf conditions. It starts off with a risk of thunderstorms on Monday the 17th, with a messy 6ft cross-onshore ENE swell at a short 8 seconds. That’s weak energy (347) and it just looks lumpy. That vibe pretty much sticks with us. Tuesday the 18th through Thursday the 20th, we’re stuck with small, 2ft to 5ft swell, mostly cross-on or onshore winds, and periods under 8 seconds. The wave energy is laughable, dropping from 182 all the way down to 96. It’s just not worth your time.
We get a little bump in size heading into the second week, but the wind stays a problem. From around Monday the 24th of August through to the end of the month, the swell pushes up, hitting 10ft and even 12ft by the 27th, with strong to very strong energy (hitting 1719). But the direction is all wrong—stiff ENE winds, onshore or cross-onshore, and the period is still short, mostly 7 to 9 seconds. That much swell with that wind just makes for a nasty, blown-out mess. For a point break like Kailua, that’s more of a kite-surfing scenario than a paddle-surfing one.
Even as we roll into September 1st, it’s the same story: 7ft swell, but with 25 mph onshore winds. The water temp anomaly is only +0.5°, so nothing weird there, just standard warm water.
There are no standouts. No hidden gems. It’s a blank run, and for Kailua, which can be fairly consistent, this stretch of poor conditions is a real bummer. Sometimes the forecasts change, but right now, I’d save the wax for another day.
Rusty
Short Range ForecastMostly dry. Warm (max 25°C on Mon afternoon, min 24°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Fri afternoon, min 24°C on Thu night). Winds increasing (calm on Thu night, fresh winds from the ENE by Sat night). | |||||||||||||||||||
Mon 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | ||||||||||||||
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 7 | ENE 7 | ENE 7 | ENE 6 | ENE 5 | E 8 | E 8 | E 8 | E 8 | E 7 | E 7 | E 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 6 | ENE 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 261 | 173 | 139 | 119 | 102 | 113 | 84 | 82 | 74 | 70 | 68 | 48 | 113 | 102 | 115 | 150 | 330 | 257 | 164 | 317 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | on | cross-on | cross-on | on | on | on | on | glassy | cross-on | cross-on | cross-on | cross-on | on | cross-on | on | on | on |
High Tide | 4:33PM0.62m | 7:01AM0.60m | 4:19PM0.57m | 8:55AM0.61m | 11:13AM0.64m | 12:09PM0.69m | 12:42PM0.74m | 9:57PM0.37m | 1:10PM0.78m | 11:42PM0.41m | ||||||||||
Low Tide | 11:37PM0.19m | 11:57AM0.50m | 00:07AM0.20m | 00:51AM0.22m | 2:10AM0.23m | 3:54AM0.21m | 9:32PM0.37m | 5:06AM0.18m | 8:28PM0.36m | |||||||||||
 |  |  | | | | | | | |  | | | | | | | | |  | |
 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — |
 | 6:59 | — | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:54 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 25 | 25 | 25 | 25 | 25 | 24 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 |
Feels °C | 25 | 25 | 24 | 24 | 24 | 24 | 26 | 27 | 27 | 27 | 27 | 28 | 28 | 29 | 27 | 26 | 25 | 24 | 23 | 23 |
Swell 1 Height (m) Direction Period (s) | S 14 | S 13 | S 13 | S 13 | S 13 | NE 6 | E 8 | E 8 | E 8 | E 7 | E 7 | E 7 | E 8 | E 8 | ESE 8 | SSW 16 | NW 13 | NW 12 | ESE 9 | NW 11 |
| kJ | 65 | 55 | 54 | 30 | 29 | 51 | 84 | 82 | 74 | 70 | 68 | 48 | 12 | 12 | 23 | 25 | 41 | 35 | 113 | 30 |
Swell 2 Height (m) Direction Period (s) | S 6 | E 9 | SW 17 | NE 8 | NNE 7 | S 12 | NE 6 | NE 6 | NE 6 | NNE 7 | NNE 7 | NNE 6 | SSW 16 | SSW 16 | SSE 15 | S 12 | SSE 14 | SSE 13 | NW 11 | SSE 13 |
| kJ | 5 | 7 | 11 | 10 | 5 | 11 | 40 | 40 | 39 | 38 | 40 | 36 | 27 | 50 | 42 | 12 | 41 | 35 | 31 | 34 |
Swell 3 Height (m) Direction Period (s) | N 7 | N 7 | N 7 | SW 18 | S 6 | SSE 9 | S 12 | S 12 | SSW 18 | SSW 18 | SSW 17 | SSW 17 | SSE 8 | S 13 | SSW 16 | SSE 15 | SSW 16 | ESE 11 | SSW 15 | SSW 14 |
| kJ | 1 | 1 | 1 | 12 | 1 | 8 | 11 | 11 | 31 | 30 | 27 | 29 | 7 | 14 | 26 | 21 | 24 | 23 | 22 | 21 |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 5 | E 8 | — | — | — | — | — | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 6 | ENE 7 |
| kJ | 261 | 173 | 139 | 119 | 102 | 113 | — | — | — | — | — | 36 | 113 | 102 | 115 | 150 | 330 | 257 | 164 | 317 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 18 | 18 | 41 | 41 | 17 | 17 | 17 | 17 | 16 | 17 | 0 | 16 | 17 | 17 | 17 | 41 | 41 | 41 | 122 | 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.
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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