Surf Forecasts:
Kailua Beach surf forecast from 18 Aug 2026:
- Most powerful swell: Monday 24 Aug, 8PM (local time) - 7.5ft (2.3m), 8s period, ENE swell with 653 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 2.3m 8s and forecast to arrive on Monday (Aug 24) at 8PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 13s period and expected on Tuesday (Aug 18) at 5AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8PM (Mon 24th Aug) | 7.5ft (2.3m) 8s |
Table - best surf conditions forecast for Kailua Beach over the next 16 days.
The Lowdown
Right then, mates, I’ve gotta be straight with you – this 16-day stretch is a bit of a write-off for any decent surf around here. Looking at the whole run from now through to the 2nd of September, it’s pretty grim. There’s no standout, no day you’d circle on the calendar, just a long, flat, messy stretch. From the get-go, it’s all poor surf conditions with onshore or cross-onshore winds. The combined wave energy is weak to moderate across the whole period, staying between 93 and 651 – not the kind of oomph that gets you excited.
Kailua Beach is the only break on the list, and to be fair, it’s a fairly consistent point. But that doesn’t help when the wind is a nightmare. For the entire 16 days, it’s blowing from the ENE, sometimes NE, and it’s either cross-on or directly onshore. That’s a real shame because a point break like this needs clean conditions to shine, but we’re looking at lumpy, choppy, and messy water from the first day. The swell direction is also from the ENE and E for the most part, which isn’t the optimum for this spot, which likes it from the NE. The water temperature is about average for the time of year, nothing unusual there.
There’s a bit of a spike in swell height around the 24th and 25th of August, pushing up to 7 ft to 8 ft, but with the wind howling at 22 to 25 mph onshore and the period short at 7-8 seconds, it’s going to be a washing machine. That sort of mess is more interesting for kite surfers than anyone with a paddle. Even when the swell drops back, the wind keeps it chopped out. There’s a period on the 30th and 31st of August where the period stretches to 10 seconds, but the wind is still blowing 12-18 mph onshore, so any groundswell potential is completely ruined.
In short, there are no real windows. The wind and swell just aren’t aligning, and the few days with a bit of size are blown out. This area tends to have runs like this, where you just have to wait for the next change. The forecast can shift, but for now, it’s a long, frustrating gap.
Stay patient, Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Thu morning, min 24°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Fri afternoon, min 24°C on Thu night). Winds increasing (light winds from the NNE on Thu night, fresh winds from the ENE by Sun morning). | ||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | ||||||||||||||
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 6 | ENE 6 | E 8 | E 8 | E 8 | E 8 | E 8 | ENE 7 | NNE 6 | ENE 7 | ENE 7 | E 6 | ENE 6 | E 7 | ENE 7 | ENE 7 | E 7 |
Wave Graph  | |||||||||||||||||||
 kJ | 178 | 157 | 108 | 92 | 112 | 84 | 64 | 74 | 54 | 71 | 35 | 113 | 121 | 213 | 245 | 331 | 308 | 268 | 396 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | cross-on | on | on | on | cross-on | on | on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on |
High Tide | 7:01AM0.60m | 4:19PM0.57m | 8:55AM0.61m | 11:13AM0.64m | 12:09PM0.69m | 12:42PM0.74m | 9:57PM0.37m | 1:10PM0.78m | 11:42PM0.41m | ||||||||||
Low Tide | 11:37PM0.19m | 11:57AM0.50m | 00:07AM0.20m | 00:51AM0.22m | 2:10AM0.23m | 3:54AM0.21m | 9:32PM0.37m | 5:06AM0.18m | 8:28PM0.36m | ||||||||||
 |  | | |  | | | | |  | | | | | | | | | | |
 | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — |
 | 6:59 | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:54 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 25 | 25 | 24 | 24 | 25 | 25 | 26 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 |
Feels °C | 25 | 25 | 24 | 23 | 25 | 26 | 26 | 28 | 26 | 28 | 29 | 28 | 29 | 27 | 25 | 24 | 24 | 24 | 24 |
Swell 1 Height (m) Direction Period (s) | S 13 | S 13 | S 13 | S 13 | E 8 | E 8 | E 8 | E 8 | E 8 | ENE 7 | NNE 6 | SSW 16 | E 8 | SSE 15 | WNW 14 | NW 12 | NW 11 | NW 11 | NW 10 |
| kJ | 55 | 30 | 30 | 29 | 112 | 84 | 64 | 74 | 54 | 71 | 35 | 25 | 12 | 42 | 20 | 37 | 33 | 30 | 17 |
Swell 2 Height (m) Direction Period (s) | E 9 | SW 17 | NE 8 | NNE 7 | NE 7 | NE 6 | S 12 | NE 6 | NE 6 | NNE 6 | E 8 | SSE 8 | SSW 16 | SSW 16 | SSW 16 | SSE 14 | SSE 13 | SSE 13 | SSE 13 |
| kJ | 7 | 11 | 10 | 10 | 44 | 39 | 11 | 42 | 43 | 36 | 31 | 7 | 50 | 26 | 25 | 41 | 35 | 18 | 34 |
Swell 3 Height (m) Direction Period (s) | N 7 | N 7 | SW 18 | ENE 7 | S 12 | S 12 | SSW 16 | SSW 18 | SSW 18 | SSW 17 | ENE 7 | S 11 | S 13 | S 10 | S 12 | SSW 16 | SSW 16 | SSW 15 | SSW 15 |
| kJ | 1 | 1 | 12 | 5 | 11 | 11 | 26 | 31 | 30 | 27 | 27 | 9 | 14 | 2 | 12 | 24 | 24 | 22 | 21 |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 6 | ENE 6 | — | — | NE 6 | — | — | — | — | ENE 7 | ENE 7 | E 6 | ENE 6 | E 7 | ENE 7 | ENE 7 | E 7 |
| kJ | 178 | 157 | 108 | 92 | — | — | 46 | — | — | — | — | 113 | 121 | 213 | 245 | 331 | 308 | 268 | 396 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 41 | 41 | 17 | 17 | 17 | 17 | 17 | 17 | 16 | 15 | 11 | 16 | 17 | 41 | 43 | 46 | 48 | 122 | 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.
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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