Surf Forecasts:
Kailua Beach surf forecast from 9 Sep 2026:
- Best quality surf: Wednesday 9 Sep, 2AM (local time) - 4.5ft (1.4m), 10s period, ENE swell with cross-offshore winds.
- Most powerful swell: Wednesday 9 Sep, 2AM (local time) - 4.5ft (1.4m), 10s period, ENE swell with 378 kJ wave energy.
- Next surfable swell (1★+): Wednesday 9 Sep, 2AM (local time) - 4.5ft (1.4m), 10s period with ENE 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 Wednesday (Sep 09) at 2AM. The primary swell is predicted to be 1.4m and 10s period with a secondary swell of 0.6m and 14s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Kailua Beach in the next 16 days are 1.4m 10s and forecast to arrive on Wednesday (Sep 09) at 2AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 19s period and expected on Tuesday (Sep 15) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Wed 9th Sep) | 4.5ft (1.4m) 10s |
| Best Surf | 2AM (Wed 9th Sep) | 4.5ft (1.4m) 10s |
| Most Powerful | 2AM (Wed 9th Sep) | 4.5ft (1.4m) 10s |
Table - best surf conditions forecast for Kailua Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here with the outlook for Kailua Beach.
Honestly, it's a grim picture for the next 16 days. We’ve got a long stretch of poor surf conditions and no real window to get excited about. The nearest thing to a surf recommendation is at the very start, but even that comes with a lot of caveats, so don't get your hopes up.
Right out of the gate on Wednesday morning the 9th, there’s some small swell pushing in at 4ft from the ENE with a 9-second period. The combined wave energy is a moderate 489, so there's a pulse, but the model’s already telling us it’s marginal. The wind is light from the NE, which is a good sign for clean lines, but with that short period and questionable tide, it’s a real gamble. By the afternoon, it drops off to a knee-high 2ft, and the quality goes with it.
From Thursday the 10th all the way through to the 24th of September, the story is all the same: poor surf conditions, and the score is a flat zero for every single session. The swell sticks around at waist to chest-high, from 2ft to 7ft, but the wind is the killer. We get stuck in a relentless ENE tradewind pattern, mostly cross-onshore or straight onshore, creating choppy, lumpy, and generally blown-out conditions. By the 17th, the wind is cranking at 22 mph, and the wave energy climbs to strong levels [714 on the 18th], but with that onshore gale, it’s more of a kite-surfing setup than a paddle session. The period stays short, mostly 7 to 8 seconds, which is just messy windswell. There’s no standout day, no hidden gem. The water temp is about average for this time of year.
So there you have it. A blank run of 16 days with nothing worth paddling out for. Not much to do but wait for the pattern to shift.
Rusty.
Short Range ForecastLight rain (total 7mm), mostly falling on Thu morning. Warm (max 27°C on Tue night, min 25°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Mon afternoon, min 24°C on Sat night). Wind will be generally light. | ||||||||||||||||||
Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | ||||||||||||||
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 10 | ENE 9 | E 13 | E 7 | ENE 7 | ENE 7 | ENE 7 | ENE 11 | E 11 | E 10 | ENE 10 | NNE 9 | NNE 9 | NE 9 | NE 9 | NE 9 | NE 8 | NE 8 | NE 8 |
Wave Graph  | |||||||||||||||||||
 kJ | 378 | 211 | 168 | 269 | 294 | 240 | 158 | 370 | 238 | 221 | 128 | 98 | 94 | 110 | 107 | 126 | 102 | 115 | 53 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | on | on | cross-on | cross-on | cross-on | on | on | on | cross-on | cross-on | on | on | cross-on | on | on | on | on | on |
High Tide | 1:08AM0.54m | 1:55PM0.86m | 1:52AM0.61m | 2:20PM0.82m | 2:33AM0.67m | 2:42PM0.77m | 3:12AM0.71m | 3:01PM0.71m | 3:52AM0.73m | 3:16PM0.65m | 4:32AM0.72m | 3:26PM0.60m | |||||||
Low Tide | 8:04PM0.27m | 7:02AM0.11m | 8:22PM0.23m | 7:46AM0.14m | 8:42PM0.19m | 8:26AM0.19m | 9:02PM0.16m | 9:06AM0.25m | 9:22PM0.14m | 9:44AM0.32m | 9:43PM0.13m | 10:23AM0.39m | 10:04PM0.13m | ||||||
 |  | |  |  | |  | | | | | | |  | | | | | | |
 | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — |
 | 6:39 | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — |
mm | — | — | — | 2 | 4 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 26 | 27 | 27 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 25 |
Feels °C | 30 | 30 | 30 | 31 | 26 | 27 | 25 | 25 | 25 | 26 | 26 | 25 | 25 | 26 | 25 | 26 | 26 | 27 | 26 |
Swell 1 Height (m) Direction Period (s) | ENE 10 | ENE 9 | ENE 8 | ENE 7 | E 12 | E 12 | E 11 | NNE 8 | NNE 8 | NE 7 | ENE 10 | NNE 9 | NNE 9 | NE 9 | NE 9 | NE 9 | NE 8 | NE 8 | NE 8 |
| kJ | 378 | 211 | 140 | 199 | 104 | 72 | 94 | 58 | 74 | 56 | 128 | 96 | 94 | 110 | 107 | 126 | 102 | 115 | 53 |
Swell 2 Height (m) Direction Period (s) | E 14 | NW 11 | NW 10 | E 13 | NW 9 | NW 9 | NW 8 | SSW 16 | SSW 15 | SSW 15 | NE 8 | ENE 10 | SSW 13 | ENE 9 | ENE 9 | SSW 14 | ESE 8 | ESE 8 | ESE 7 |
| kJ | 132 | 110 | 110 | 158 | 21 | 13 | 11 | 26 | 22 | 22 | 72 | 98 | 17 | 27 | 25 | 20 | 7 | 6 | 5 |
Swell 3 Height (m) Direction Period (s) | S 8 | E 13 | E 13 | NW 8 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | NW 8 | SSW 12 | SSW 16 | SW 16 | NW 15 | SSW 15 | SW 15 | ESE 9 | SW 14 | SW 22 | SW 21 |
| kJ | 32 | 168 | 168 | 57 | 33 | 32 | 14 | 14 | 3 | 13 | 24 | 10 | 8 | 21 | 8 | 8 | 8 | 18 | 18 |
Wind waves Height (m) Direction Period (s) | — | — | — | E 7 | ENE 7 | ENE 7 | ENE 7 | ENE 11 | E 11 | E 10 | — | — | E 9 | E 5 | E 5 | ENE 5 | ENE 5 | E 8 | NE 5 |
| kJ | — | — | — | 269 | 294 | 240 | 158 | 370 | 238 | 221 | — | — | 79 | 23 | 25 | 29 | 17 | 45 | 22 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 16 | 17 | 16 | 41 | 41 | 17 | 17 | 17 | 17 | 20 | 17 | 17 | 17 | 17 | 17 | 17 | 16 | 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.
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