Surf Forecasts:
Kailua Beach surf forecast from 1 Aug 2026:
- Most powerful swell: Saturday 1 Aug, 2PM (local time) - 8ft (2.5m), 8s period, ENE swell with 939 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 2.5m 8s and forecast to arrive on Saturday (Aug 01) at 2PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 12s period and expected on Thursday (Aug 06) at 5AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2PM (Sat 1st Aug) | 8ft (2.5m) 8s |
Table - best surf conditions forecast for Kailua Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on offer over the next couple of weeks.
Alright, so the bad news first: for the entire 16-day window, the conditions at Kailua Beach are just plain ugly. We’ve got a persistent ENE wind blowing straight onshore or cross-onshore for the whole run, and that’s going to keep the surf messy and blown out. There’s no real stand-out session here, I’m sorry to say. The forecast shows a long stretch of poor surf quality with no break in the pattern.
The swell energy is moderate to strong, but all that energy is paired with bad wind. On the 1st of August, Saturday morning, we’re looking at 8.2ft of swell from the E with a period of 8 seconds, and the combined energy is a hefty 1129 (strong wave energy). But with a cross-on 25 mph wind, it’s just a washing machine. That’s more of a kite-surfing setup than a paddle-surfing one. Water temp is 80.2°F with a 0.7°F anomaly – that’s about average for this time of year.
The pattern stays the same through the first week. Swell heights drop a bit, but the wind stays on it. The 4th of August, Tuesday morning, sees a drop in wind to 9 mph, but it’s still cross-on, and the swell is 5.2ft from the ENE with a longer period of 11 seconds. That longer period could give some shape, but the cross-on wind will still chop it up. The energy is moderate at 593.
From the 5th onward, we’ve got a mix of gentle to moderate breezes, but always cross-onshore. The swell drops to around 3.9ft to 4.9ft, with periods shortening to 6 or 7 seconds by the 10th. That’s short-period, weak energy (down to 109 on the 16th). The entire second week is just more of the same: poor conditions, chop, and lumpy surf.
There’s honestly no day I’d recommend paddling out at Kailua Beach in this window. The combination of persistent onshore wind and messy conditions means you’re better off waiting for a change in the forecast.
Short Range ForecastLight rain (total 2mm), mostly falling on Sat night. Warm (max 26°C on Sat morning, min 24°C on Mon night). Winds decreasing (strong winds from the ENE on Sat morning, light winds from the ENE by Mon night). | Days 4-6 Weather SummaryLight rain (total 6mm), mostly falling on Tue night. Warm (max 26°C on Wed morning, min 24°C on Tue morning). Wind will be generally light. | ||||||||||||||||||||
Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | |||||||||||||||
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) | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 11 | ENE 11 | ENE 11 | ENE 10 | ENE 9 | ENE 9 | ENE 8 | ENE 6 | E 6 | E 6 | ENE 6 | E 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 924 | 910 | 908 | 682 | 650 | 533 | 361 | 370 | 329 | 593 | 496 | 427 | 275 | 222 | 172 | 229 | 115 | 71 | 104 | 170 | 280 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | on | on | on | on | on | on | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 4:25PM0.79m | 4:37AM0.55m | 4:43PM0.75m | 5:34AM0.57m | 5:00PM0.69m | 6:49AM0.58m | 5:12PM0.63m | 8:35AM0.61m | 5:05PM0.58m | 10:38AM0.68m | 11:52AM0.77m | ||||||||||
Low Tide | 9:35AM0.18m | 11:03PM0.25m | 10:10AM0.26m | 11:29PM0.22m | 10:50AM0.35m | 00:00AM0.19m | 11:41AM0.45m | 00:39AM0.17m | 1:20PM0.54m | 1:33AM0.15m | 2:46AM0.13m | 4:07AM0.10m | |||||||||
 | |  | | |  |  | | | | |  |  | | | | | | |  | | |
 | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — |
 | — | 7:09 | — | — | 7:08 | — | — | 7:08 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — | — | 7:06 | — |
mm | — | — | 1 | — | — | — | — | — | 1 | — | — | 2 | 2 | 1 | 1 | — | — | — | 1 | — | — |
Temp °C | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 26 | 25 |
Feels °C | 23 | 22 | 22 | 22 | 22 | 22 | 25 | 25 | 24 | 26 | 26 | 27 | 28 | 28 | 27 | 27 | 27 | 27 | 24 | 26 | 24 |
Swell 1 Height (m) Direction Period (s) | E 15 | E 14 | E 14 | E 14 | E 14 | E 13 | E 13 | E 12 | E 12 | ENE 11 | ENE 11 | ENE 11 | ENE 10 | ENE 9 | NNE 8 | NNW 8 | NNW 8 | ENE 7 | NNW 7 | NNW 7 | N 7 |
| kJ | 205 | 196 | 194 | 188 | 134 | 87 | 84 | 76 | 101 | 593 | 496 | 427 | 275 | 222 | 6 | 13 | 11 | 31 | 10 | 10 | 8 |
Swell 2 Height (m) Direction Period (s) | SSW 14 | SSW 14 | N 10 | N 9 | N 9 | N 8 | N 8 | SSE 13 | SSW 12 | SSW 12 | SSW 11 | S 13 | NNE 9 | NNE 8 | S 12 | S 12 | S 11 | NNW 7 | NE 10 | ENE 12 | NE 11 |
| kJ | 19 | 18 | 17 | 26 | 14 | 6 | 10 | 17 | 14 | 14 | 13 | 14 | 8 | 7 | 11 | 11 | 10 | 10 | 14 | 14 | 20 |
Swell 3 Height (m) Direction Period (s) | S 11 | N 11 | SSW 14 | SSW 14 | SW 13 | SSW 13 | S 13 | SSW 12 | N 7 | SSE 12 | S 13 | NNE 9 | S 13 | S 12 | NNW 9 | N 8 | N 7 | ENE 10 | S 11 | S 11 | SW 14 |
| kJ | 10 | 9 | 19 | 19 | 7 | 17 | 13 | 15 | 4 | 15 | 13 | 8 | 13 | 12 | 8 | 5 | 4 | 10 | 9 | 9 | 8 |
Wind waves Height (m) Direction Period (s) | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | — | — | — | — | — | ENE 9 | ENE 8 | ENE 6 | E 6 | E 6 | ENE 6 | E 7 |
| kJ | 924 | 910 | 908 | 682 | 650 | 533 | 361 | 370 | 329 | — | — | — | — | — | 172 | 229 | 115 | 71 | 104 | 170 | 280 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 144 | 51 | 125 | 125 | 152 | 41 | 18 | 42 | 17 | 17 | 17 | 17 | 41 | 17 | 17 | 17 | 41 | 17 | 46 | 46 | 46 |
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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