Surf Forecasts:
Kailua Beach surf forecast from 14 Aug 2026:
- Most powerful swell: Sunday 16 Aug, 5AM (local time) - 15ft (4.5m), 10s period, E swell with 3,899 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 4.5m 10s and forecast to arrive on Sunday (Aug 16) at 5AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 8s period and expected on Sunday (Aug 16) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5AM (Sun 16th Aug) | 15ft (4.5m) 10s |
Table - best surf conditions forecast for Kailua Beach over the next 16 days.
The Lowdown
Alright, this is Rusty, and I got to be straight with you – this is a tough stretch for Kailua Beach (Oahu). The next 16 days are looking like a write-off for any decent waves.
Right from the start, we're in trouble. Friday the 14th through the weekend sees onshore winds screaming from the ENE, blowing 18 to 28 mph, just wrecking the surface. Saturday the 15th brings a 10ft swell from the east, but the wind is howling with rain and thunderstorms in the forecast. There's a ton of energy in the water, but with that strong cross-onshore wind, the sea state is just ugly.
We slide into the next week, and it's the same story. Monday through to Thursday (17th-21st) we get a bit of a drop in swell, down to 3ft to 5ft, but the wind is still cross-onshore or onshore, making for choppy, poor surf. The energy levels are low to moderate, and the whole setup is just messy. There are days of clear skies and that might look pretty, but the wind and wind-swell combo are giving us nothing rideable.
A few decent swells try to show up late in the period – the 27th and 28th of August have swell pushing 7ft to 8ft from the ENE, even hitting 10-second periods on the 28th. But you guessed it, the wind is still onshore or cross-onshore from the ENE, 18 mph or more, turning what could be a fun size into a lumpy, blown-out mess. There is no standout, no clean window. This is about as blank a run as we get. Conditions look better for a kite when it's this windy. Your board should just stay in the bag.
Rusty
Short Range ForecastHeavy rain (total 53mm), heaviest during Sun morning. Warm (max 26°C on Fri morning, min 24°C on Sun morning). Winds decreasing (near gales from the ENE on Sat night, moderate winds from the E by Sun night). | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Mon morning. Warm (max 25°C on Mon morning, min 25°C on Mon morning). Wind will be generally light. | ||||||||||||||||||||
Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | |||||||||||||||
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 8 | ENE 8 | ENE 8 | ENE 8 | E 9 | E 9 | E 9 | E 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | E 8 | E 8 | E 8 | E 7 | E 7 | E 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 494 | 569 | 984 | 1431 | 1583 | 3141 | 2697 | 1068 | 695 | 356 | 292 | 210 | 163 | 163 | 140 | 112 | 84 | 63 | 106 | 96 | 123 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on |
High Tide | 3:54PM0.82m | 4:08AM0.61m | 4:13PM0.75m | 4:57AM0.62m | 4:27PM0.68m | 5:52AM0.61m | 4:33PM0.62m | 7:01AM0.60m | 4:19PM0.57m | 8:55AM0.61m | 11:13AM0.64m | ||||||||||
Low Tide | 9:13AM0.15m | 10:23PM0.21m | 9:51AM0.24m | 10:47PM0.20m | 10:29AM0.33m | 11:11PM0.19m | 11:08AM0.42m | 11:37PM0.19m | 11:57AM0.50m | 00:07AM0.20m | 00:51AM0.22m | 2:10AM0.23m | |||||||||
 | |  |  | |  | | |  | |  |  | | |  | | | | | | | |
 | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — |
 | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — |
mm | — | — | 2 | 2 | 1 | 9 | 19 | 7 | 13 | 2 | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 26 | 26 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 25 |
Feels °C | 24 | 24 | 23 | 23 | 23 | 21 | 24 | 25 | 26 | 25 | 24 | 24 | 24 | 24 | 25 | 26 | 26 | 25 | 26 | 27 | 26 |
Swell 1 Height (m) Direction Period (s) | S 14 | S 14 | S 14 | S 13 | S 13 | S 14 | SSE 9 | SSE 8 | S 7 | S 14 | S 14 | S 13 | S 13 | S 13 | S 13 | NE 7 | E 8 | E 8 | NNE 7 | NE 7 | NE 7 |
| kJ | 106 | 102 | 62 | 55 | 55 | 35 | 42 | 48 | 24 | 66 | 65 | 55 | 53 | 30 | 28 | 50 | 84 | 63 | 38 | 47 | 37 |
Swell 2 Height (m) Direction Period (s) | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 9 | S 16 | S 16 | S 13 | SSE 6 | SSE 6 | S 5 | E 9 | SW 18 | N 8 | S 12 | NE 7 | NE 7 | SSW 18 | SSW 18 | SSW 17 |
| kJ | 6 | 6 | 6 | 7 | 6 | 8 | 84 | 46 | 56 | 12 | 6 | 2 | 15 | 12 | 5 | 11 | 47 | 47 | 31 | 30 | 27 |
Swell 3 Height (m) Direction Period (s) | — | S 18 | SSW 17 | S 20 | S 16 | S 18 | W 19 | S 13 | S 16 | S 10 | N 7 | N 7 | SW 17 | S 6 | SW 18 | SSE 9 | S 12 | S 12 | S 11 | SSE 9 | S 15 |
| kJ | — | 6 | 29 | 7 | 5 | 25 | 7 | 29 | 45 | 7 | 1 | 1 | 11 | 1 | 12 | 8 | 11 | 11 | 10 | 8 | 17 |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | ENE 8 | E 9 | E 9 | E 9 | E 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | E 8 | — | — | E 7 | E 7 | E 9 |
| kJ | 494 | 569 | 984 | 1431 | 1583 | 3141 | 2697 | 1068 | 695 | 356 | 292 | 210 | 163 | 163 | 140 | 112 | — | — | 106 | 96 | 123 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 46 | 52 | 126 | 153 | 206 | 153 | 125 | 44 | 17 | 41 | 41 | 41 | 41 | 41 | 17 | 17 | 17 | 17 | 41 | 17 | 17 |
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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