Surf Forecasts:
Kailua Beach surf forecast from 19 Aug 2026:
- Most powerful swell: Monday 24 Aug, 11PM (local time) - 8ft (2.4m), 8s period, ENE swell with 627 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 2.4m 8s and forecast to arrive on Monday (Aug 24) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 12s period and expected on Sunday (Aug 23) at 5AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Mon 24th Aug) | 8ft (2.4m) 8s |
Table - best surf conditions forecast for Kailua Beach over the next 16 days.
The Lowdown
Alright, Rusty here. Let's have a look at what's coming down the line for Kailua Beach.
Honestly, for the foreseeable future, it's a pretty grim outlook. We've got a solid 16 days on the board, but the first week and a half are a write-off for any kind of decent paddle surfing on the point. The forecast shows a persistent, strong tradewind pattern blowing straight onshore from the ENE, and the wave state is going to be ugly. The combined swell energy is weak to moderate at best, maxing out around 345 (345) on the 24th, but that's all swept away by the messy wind. The water temp is sitting at a normal 80.4° for this time of year, but you won't want to be in it fighting that chop for no reward.
From the afternoon of Tuesday, September 2nd, something might finally start to change. The winds look set to swing around to the NNE and drop off, becoming a light to gentle breeze. The swell direction stays out of the E to ENE, but at a solid 5.2ft to 5.6ft with a period stretching out to 10 seconds. That's groundswell energy, which is a big step up. The combined energy gets a bump too, with values like 638 (638). It's still only a "marginal" read on the forecast, but the conditions are trending the right way. That Wednesday morning on the 2nd is the one to have your eye on if you're desperate, as it looks like the cleanest window we might get.
Standout: Honestly, with the constant onshore winds through the entire look-ahead, nothing is a standout. If you have to go, pin your hopes on Kailua Beach on *Wednesday, September 2nd, morning*. The light offshore breeze from the NNE could clean up the 5.6ft, 10-second E groundswell for a session. Just don't expect perfection.
Short Range ForecastMostly dry. Warm (max 27°C on Thu night, 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 25°C on Sat night). Winds increasing (light winds from the E on Fri afternoon, fresh winds from the ENE by Sun morning). | |||||||||||||||||||
Tue 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | ||||||||||||||
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 | E 8 | E 8 | E 8 | E 8 | ENE 7 | NE 7 | NE 7 | ENE 7 | ENE 6 | ENE 6 | E 7 | E 7 | ENE 6 | ENE 6 | E 6 | ENE 7 | ENE 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 160 | 172 | 121 | 84 | 82 | 57 | 54 | 69 | 93 | 106 | 149 | 176 | 245 | 293 | 293 | 253 | 235 | 345 | 448 | 592 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on | on | on | cross-on |
High Tide | 4:19PM0.57m | 8:55AM0.61m | 11:13AM0.64m | 12:09PM0.69m | 12:42PM0.74m | 9:57PM0.37m | 1:10PM0.78m | 11:42PM0.41m | 1:34PM0.81m | 00:29AM0.45m | ||||||||||
Low Tide | 00:07AM0.20m | 00:51AM0.22m | 2:10AM0.23m | 3:54AM0.21m | 9:32PM0.37m | 5:06AM0.18m | 8:28PM0.36m | 5:55AM0.14m | 8:26PM0.35m | |||||||||||
 |  |  | | | | | | | |  | | | | | | | | | | |
 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — |
 | 6:59 | — | — | 6:58 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:54 | — | — | 6:53 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 25 | 25 | 25 | 25 | 25 | 26 | 27 | 25 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
Feels °C | 24 | 24 | 26 | 26 | 26 | 27 | 29 | 30 | 27 | 29 | 29 | 26 | 25 | 24 | 24 | 23 | 24 | 23 | 24 | 24 |
Swell 1 Height (m) Direction Period (s) | S 13 | S 13 | S 12 | NE 6 | E 8 | NE 6 | NE 7 | ENE 7 | NE 7 | E 8 | SSW 16 | SSE 15 | SSW 16 | WNW 12 | SSE 13 | NW 11 | ESE 9 | NW 12 | NW 12 | NW 11 |
| kJ | 30 | 29 | 11 | 39 | 82 | 40 | 46 | 69 | 93 | 6 | 50 | 42 | 25 | 29 | 35 | 19 | 68 | 35 | 34 | 19 |
Swell 2 Height (m) Direction Period (s) | SW 18 | NNE 7 | SSE 9 | S 12 | NE 6 | E 8 | E 8 | NNE 7 | SSW 17 | SSW 16 | ESE 8 | SSW 16 | S 12 | SSE 14 | NW 11 | SSE 13 | NW 11 | SSE 13 | SSW 13 | SSW 13 |
| kJ | 12 | 5 | 8 | 11 | 46 | 57 | 54 | 46 | 29 | 25 | 14 | 26 | 12 | 41 | 33 | 18 | 31 | 33 | 18 | 16 |
Swell 3 Height (m) Direction Period (s) | W 13 | SW 18 | SW 16 | SW 16 | S 12 | SSW 18 | SSW 18 | SSW 17 | S 15 | SSE 9 | S 13 | NW 16 | WNW 14 | SSW 16 | SSW 16 | SSW 15 | SSE 13 | SSW 14 | SSE 12 | SSE 12 |
| kJ | 3 | 12 | 10 | 11 | 11 | 31 | 30 | 27 | 17 | 7 | 14 | 9 | 18 | 24 | 24 | 22 | 34 | 19 | 15 | 14 |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 7 | E 8 | — | — | — | — | — | NE 7 | ENE 7 | ENE 6 | ENE 6 | E 7 | E 7 | ENE 6 | ENE 6 | E 6 | ENE 7 | ENE 8 |
| kJ | 160 | 172 | 121 | 84 | — | — | — | — | — | 106 | 149 | 176 | 245 | 293 | 293 | 253 | 235 | 345 | 448 | 592 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 17 | 17 | 17 | 17 | 17 | 17 | 16 | 16 | 16 | 17 | 16 | 41 | 43 | 46 | 50 | 50 | 41 | 48 | 46 | 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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