Surf Forecasts:
Kailua Beach surf forecast from 4 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 8PM (local time) - 4.5ft (1.3m), 9s period, ENE swell with cross-offshore winds.
- Most powerful swell: Monday 7 Sep, 5PM (local time) - 10ft (3.0m), 12s period, E swell with 2,300 kJ wave energy.
- Next surfable swell (1★+): Tuesday 8 Sep, 8PM (local time) - 4.5ft (1.3m), 9s 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 8PM. The primary swell is predicted to be 1.3m and 9s period with a secondary swell of 0.7m 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 3.0m 12s and forecast to arrive on Monday (Sep 07) at 5PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.1m 7s period and expected on Monday (Sep 07) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Tue 8th Sep) | 4.5ft (1.3m) 9s |
| Best Surf | 8PM (Tue 8th Sep) | 4.5ft (1.3m) 9s |
| Most Powerful | 5PM (Mon 7th Sep) | 10ft (3.0m) 12s |
Table - best surf conditions forecast for Kailua Beach over the next 16 days.
The Lowdown
Right, let’s have a look at what’s on offer for Kailua Beach. Gotta be straight with you – this is a tough stretch. We’re looking at a 16-day window starting from September 3rd, and honestly, the first week is pretty much a write-off. The onshore and cross-onshore winds are relentless, mostly from the ENE, blowing at 18 to 22 mph, just chopping everything up. The swell is there, but it’s ugly. We’ve got a 7 ft swell on Thursday morning with a short 7-second period, and the combined energy is moderate (561). It’s just not worth paddling out for. This pattern hangs on through the weekend and into the following week, with swell heights even pushing 10 ft by Monday the 7th, but with that same onshore wind, it’s a mess. The water temp is sitting at 80°, which is about average for this time of year, so nothing weird there.
Then, there’s a glimmer. Tuesday, September 8th, is the only real standout in the whole run. The morning shows a 5 ft ENE swell with an 11-second period, and the wind swings around to a light cross-offshore from the S at 12 mph. The combined energy is moderate (664), and the wave comment says “clean”. That’s the word we want to hear. By Tuesday afternoon, it drops a little to 4 ft, but the wind goes even lighter, a gentle SSE breeze at 9 mph, keeping it clean. This is the best window you’re going to get – a couple of sessions with proper shape and no wind chop. After that, it’s back to the grind. The wind picks up again, and we get a long stretch of poor conditions from Wednesday the 9th right through to the 18th. There are a few marginal windows in the second week, like the morning of Friday the 11th with a 6 ft ENE swell (13-second period) and a gentle cross-onshore breeze, but it’s still fairly choppy. The crowd factor at Kailua Beach is “sometimes”, so when it’s good, you might have a few others out, but it won’t be packed.
So, to sum it up: the first week is a no-go. Your only real chance is Tuesday, September 8th. Get out there for the morning or the afternoon session – that’s the pick of the 16 days. The rest is a long, frustrating gap with onshore winds and lumpy seas. Hang in there, the forecasts can change.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Thu afternoon. Warm (max 26°C on Thu night, min 25°C on Thu afternoon). Mainly fresh winds. | Days 5-7 Weather SummaryHeavy rain (total 37mm), heaviest during Sun night. Warm (max 28°C on Tue morning, min 23°C on Sun night). Winds decreasing (strong winds from the SSE on Mon night, light winds from the SE by Tue night). | |||||||||||||||||||
Thu 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | ||||||||||||||
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 | E 14 | E 14 | ENE 14 | ENE 14 | ENE 13 | ENE 13 | ENE 12 | ENE 12 | ENE 12 | E 12 | E 12 | ENE 12 | ENE 11 | ENE 10 | E 14 | ENE 8 | ENE 8 | ENE 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 456 | 403 | 392 | 577 | 1868 | 1519 | 1496 | 1630 | 1382 | 1622 | 1754 | 1960 | 2300 | 1001 | 649 | 349 | 200 | 196 | 176 | 193 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | on | on | on | on | on | cross-on | cross-on | on | cross-on | cross | cross-off | cross-off | cross-off | cross-on | cross-on | cross-on | cross-on |
High Tide | 10:21AM0.72m | 11:33AM0.78m | 12:19PM0.83m | 11:14PM0.40m | 12:55PM0.86m | 00:19AM0.47m | 1:27PM0.87m | 1:08AM0.54m | 1:55PM0.86m | 1:52AM0.61m | ||||||||||
Low Tide | 00:39AM0.15m | 2:15AM0.17m | 4:01AM0.16m | 7:47PM0.35m | 5:17AM0.13m | 7:50PM0.31m | 6:14AM0.11m | 8:04PM0.27m | 7:02AM0.11m | 8:22PM0.23m | ||||||||||
 |  |  | |  | | |  |  |  |  | | |  | | | |  | | | |
 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — |
 | 6:45 | — | — | 6:44 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — | — | 6:39 | — | — | 6:38 | — |
mm | 1 | — | — | — | — | — | — | 2 | 1 | 9 | 16 | 2 | 2 | 5 | 2 | — | 1 | — | — | — |
Temp °C | 25 | 26 | 25 | 25 | 25 | 25 | 26 | 25 | 26 | 26 | 26 | 26 | 27 | 27 | 28 | 28 | 27 | 26 | 26 | 25 |
Feels °C | 22 | 22 | 21 | 22 | 23 | 23 | 25 | 24 | 26 | 27 | 26 | 25 | 27 | 25 | 29 | 29 | 30 | 27 | 26 | 24 |
Swell 1 Height (m) Direction Period (s) | E 12 | E 14 | E 14 | E 14 | S 12 | S 12 | S 12 | SSW 12 | SSW 12 | SSW 12 | SSW 14 | SW 15 | SW 15 | ENE 12 | ENE 11 | ENE 10 | ENE 8 | E 13 | E 13 | E 13 |
| kJ | 107 | 264 | 357 | 577 | 136 | 178 | 180 | 152 | 155 | 133 | 233 | 318 | 704 | 1001 | 649 | 349 | 188 | 176 | 176 | 171 |
Swell 2 Height (m) Direction Period (s) | SSE 12 | S 12 | S 12 | S 12 | NNE 11 | NNE 10 | NNE 10 | SSE 9 | NNE 8 | SSE 10 | SSW 18 | S 9 | S 17 | E 15 | E 14 | E 14 | E 14 | SSW 14 | SSW 14 | NW 10 |
| kJ | 85 | 104 | 199 | 193 | 24 | 20 | 19 | 9 | 12 | 10 | 64 | 40 | 142 | 104 | 144 | 184 | 200 | 66 | 36 | 45 |
Swell 3 Height (m) Direction Period (s) | S 14 | NW 9 | N 9 | N 12 | S 19 | SSW 17 | SSW 18 | N 11 | SSE 10 | N 10 | NW 16 | SSW 17 | NNW 13 | SSW 15 | SSW 15 | S 8 | NW 9 | NW 8 | NW 10 | SSW 13 |
| kJ | 64 | 3 | 1 | 3 | 7 | 30 | 30 | 10 | 10 | 8 | 10 | 99 | 17 | 74 | 76 | 68 | 47 | 15 | 26 | 34 |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 14 | ENE 14 | ENE 13 | ENE 13 | ENE 12 | ENE 12 | ENE 12 | E 12 | E 12 | S 11 | S 9 | — | — | ENE 8 | ENE 8 | ENE 7 |
| kJ | 456 | 403 | 392 | 369 | 1868 | 1519 | 1496 | 1630 | 1382 | 1622 | 1754 | 1960 | 2300 | 804 | 123 | — | — | 196 | 176 | 193 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 50 | 46 | 50 | 122 | 41 | 41 | 46 | 41 | 41 | 17 | 18 | 54 | 119 | 137 | 11 | 7 | 16 | 18 | 41 | 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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