Surf Forecasts:
Kailua Beach surf forecast from 8 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 5PM (local time) - 5.5ft (1.7m), 11s period, ENE swell with offshore winds.
- Most powerful swell: Tuesday 8 Sep, 5AM (local time) - 6ft (1.9m), 12s period, ENE swell with 966 kJ wave energy.
- Next surfable swell (1★+): Tuesday 8 Sep, 5PM (local time) - 5.5ft (1.7m), 11s 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 Tuesday (Sep 08) at 5PM. The primary swell is predicted to be 1.7m and 11s period with a secondary swell of 0.5m and 14s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Kailua Beach in the next 16 days are 1.9m 12s and forecast to arrive on Tuesday (Sep 08) at 5AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.3m 8s period and expected on Tuesday (Sep 08) at 5AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5PM (Tue 8th Sep) | 5.5ft (1.7m) 11s |
| Best Surf | 5PM (Tue 8th Sep) | 5.5ft (1.7m) 11s |
| Most Powerful | 5AM (Tue 8th Sep) | 6ft (1.9m) 12s |
Table - best surf conditions forecast for Kailua Beach over the next 16 days.
The Lowdown
Alright, mate. Rusty here with a look at what’s on the menu for Kailua Beach over the next couple of weeks.
Honestly, it’s a bit of a slow burn for the first few days. The good news is that Tuesday afternoon is the clear standout and the only true window to get excited about. We’ve got a solid 6ft groundswell pumping in from the ENE with a period of 11 seconds, and the wind is swinging offshore from the SSW at just 12 mph. That’s a recipe for clean, lined-up waves at this point break. The energy is moderate (821) and with the wind holding offshore, it’s going to be glassy and fun. It’s not huge, but it’s quality. Keep in mind crowds are possible here at Kailua Beach, so get out early or snag the arvo session.
Tuesday morning is a fallback option with the same size swell (6ft, ENE, 11 seconds) but a stronger cross-off wind at 22 mph, which will make it a bit lumpier. The water temp is about average for this time of year, so no wetsuit worries.
After that, the outlook drops right off. From Wednesday morning all the way through to Thursday the 17th, it’s mostly poor surf conditions with tiny, choppy swell and onshore or cross-onshore winds. You’re looking at a lot of days with nothing worth paddling out for—mostly weak, short-period slop under 3ft. There’s a string of no-go days from the 10th right through to the 16th where the waves are just not cooperating.
We do see a glimmer of hope on Thursday the 17th and Friday the 18th, with the swell bumping up to 5ft from the E/ENE, period around 8 seconds, and light winds. The energy picks up (around 355-385), but the commentary still calls it marginal. It’s not the clean, offshore perfection of that Tuesday, but it might be worth a look if you’re desperate for a paddle.
Further out, from the 20th onward, it’s back to tiny, weak, and choppy. The whole second week looks pretty bleak.
So, to cut it short: the best surf on offer is Tuesday afternoon (September 8th) at Kailua Beach. Get it while it’s good because the next decent chance is over a week away and it’s uncertain.
Stay frosty,
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Wed night. Warm (max 29°C on Tue afternoon, min 25°C on Thu afternoon). Winds decreasing (fresh winds from the SSW on Tue morning, calm by Tue night). | Days 4-6 Weather SummarySome drizzle, heaviest during Sun night. Warm (max 26°C on Sun afternoon, min 25°C on Fri morning). Wind will be generally light. | ||||||||||||||||||||
Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | |||||||||||||||
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 11 | ENE 11 | ENE 10 | ENE 9 | E 13 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 11 | ENE 10 | E 10 | ENE 10 | NNE 9 | NE 8 | NE 8 | ENE 6 | NE 8 | NE 8 | ENE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 785 | 724 | 378 | 211 | 168 | 254 | 330 | 251 | 158 | 125 | 297 | 231 | 196 | 157 | 94 | 102 | 102 | 77 | 72 | 145 | 170 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | glassy | on | cross-on | cross-on | cross-on | on | on | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | on | on | on | on | cross-on |
High Tide | 1:27PM0.87m | 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 | — | — | 6:16 | — | — |
 | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — |
mm | 1 | — | — | — | — | 3 | 1 | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 1 | 3 |
Temp °C | 28 | 29 | 27 | 27 | 27 | 27 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 26 | 26 | 26 |
Feels °C | 28 | 29 | 30 | 30 | 30 | 29 | 26 | 26 | 25 | 25 | 25 | 25 | 26 | 26 | 25 | 26 | 27 | 26 | 28 | 27 | 27 |
Swell 1 Height (m) Direction Period (s) | ENE 11 | ENE 11 | ENE 10 | ENE 9 | ENE 8 | E 13 | E 12 | E 12 | E 11 | ENE 11 | NNE 8 | ENE 10 | NE 8 | NNE 9 | NNE 9 | NE 8 | NE 8 | NE 8 | NE 8 | E 8 | NE 8 |
| kJ | 785 | 724 | 378 | 211 | 140 | 158 | 104 | 72 | 94 | 97 | 50 | 231 | 69 | 94 | 94 | 102 | 102 | 72 | 72 | 29 | 104 |
Swell 2 Height (m) Direction Period (s) | SSW 15 | E 14 | E 14 | E 13 | E 13 | NW 10 | NW 9 | SSW 13 | SSW 12 | NNE 8 | SSW 15 | NNE 8 | SSW 16 | SW 16 | ENE 9 | ENE 9 | ESE 10 | E 9 | ESE 8 | SSW 22 | E 8 |
| kJ | 75 | 97 | 132 | 168 | 168 | 59 | 28 | 32 | 14 | 35 | 22 | 58 | 24 | 10 | 46 | 26 | 9 | 39 | 22 | 45 | 55 |
Swell 3 Height (m) Direction Period (s) | NNW 12 | SSW 15 | S 8 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | NNW 7 | SSW 16 | SSW 16 | S 12 | SSW 12 | S 11 | SW 13 | SSW 13 | SSW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 21 |
| kJ | 14 | 73 | 32 | 65 | 35 | 34 | 33 | 5 | 26 | 26 | 11 | 13 | 2 | 7 | 17 | 21 | 8 | 8 | 8 | 8 | 18 |
Wind waves Height (m) Direction Period (s) | S 10 | S 9 | — | — | — | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 11 | — | E 10 | ENE 10 | ENE 5 | ENE 6 | ENE 6 | ENE 6 | ENE 5 | NE 8 | ENE 8 |
| kJ | 417 | 150 | — | — | — | 254 | 330 | 251 | 158 | 125 | 297 | — | 196 | 157 | 44 | 54 | 74 | 77 | 41 | 145 | 170 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 105 | 0 | 0 | 16 | 17 | 16 | 41 | 18 | 17 | 17 | 17 | 17 | 41 | 17 | 41 | 41 | 16 | 16 | 17 | 18 | 18 |
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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