
Surf Forecasts:
Kailua Beach surf forecast from 20 Jul 2026:
- Most powerful swell: Sunday 26 Jul, 5AM (local time) - 5ft (1.5m), 17s period, E swell with 1,216 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 1.5m 17s and forecast to arrive on Sunday (Jul 26) at 5AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 16s period and expected on Monday (Jul 20) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5AM (Sun 26th Jul) | 5ft (1.5m) 17s |
Table - best surf conditions forecast for Kailua Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s take a look at what’s coming up.
Right off the bat, I gotta be straight with you: the next couple of weeks are looking pretty grim for quality surf. The system is showing a long stretch of poor conditions, with no real standout sessions until the very end of the period. The only time the forecast even hints at something rideable is around the 27th of July and into the 28th, and even then, it’s marginal.
Starting from Monday the 20th of July, Kailua Beach is a write-off. We’ve got a mix of rain showers and onshore winds from the NE and ENE, blowing 12 to 19 mph, with swell around 4 ft to 5 ft coming from the ENE. The period is short, around 7 to 8 seconds, so it’s weak and choppy. The combined wave energy is moderate (199 to 292), but the wind is just ruining any chance of a clean face. It’s poor, plain and simple.
This continues right through the week. Wednesday the 22nd and Thursday the 23rd see the wind pick up even more, hitting 19 mph from the ENE, and the swell bumps up to 6 ft to 6 ft. The energy climbs into the 300s (367 to 289), but with short-period, lumpy, onshore junk, you’re better off doing something else. The water temp is sitting at 80°, which is about average for the time of year.
By Friday the 24th and into the weekend, the swell gets a bit bigger, 7 ft from the ENE, and the energy jumps into the 400s to 700s, but it’s still onshore and messy. This is more of a kite-surfing setup than a paddle-surfing one, especially with that fresh breeze.
Now, Sunday the 26th of July is interesting, but not in a good way. We get a big pulse of long-period groundswell from the E, hitting 5 ft with a period of 16 seconds. The energy is massive (1567), but remember, a long period like that at a beach break like Kailua can make it break too straight and hard to manage. Plus, the wind is still onshore at 16 mph from the ENE. Still, the forecast says poor conditions.
The first real glimmer of hope comes on Monday the 27th of July. The swell drops to 5 ft from the E, period is still long at 14 seconds, and the wind lightens up, blowing 12 mph from the NE, staying onshore but more manageable. The energy is still very strong (1348). The forecast finally calls it “marginal” instead of “poor.” It’s not great, but it’s the best we’ve seen. Crowds are possible at Kailua Beach, as it says they are “sometimes” busy.
Tuesday the 28th of July morning has the best chance of the whole outlook. The wind drops to 9 mph from the NE, onshore, but that’s getting close to glassy. The swell is 6 ft from the E with a 13-second period, and the energy is still strong (1081). The forecast calls it marginal again. This is the one to keep an eye on. If that wind goes a bit lighter, you might snag a couple.
After that, it fades again. The wind stays onshore, the swell drops, and by the 31st of July and into August, we’re back to poor conditions with fresh breezes and short-period junk. The 2nd and 3rd of August see a bit more size (7 ft to 7 ft) but it’s still onshore from the ENE, so it’s not going to be clean.
The only true standout, if you can call it that, is Tuesday morning the 28th of July. It’s the cleanest window we get, with the lightest wind and a decent, long-period groundswell from the east. But don’t expect perfection. It’s a long way out, so treat it as promising but uncertain.
Stay patient, and keep your eye on the sky.
Rusty.
Short Range ForecastModerate rain (total 15mm), heaviest on Tue night. Warm (max 26°C on Mon afternoon, min 24°C on Tue night). Mainly fresh winds. | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Thu morning. Warm (max 25°C on Thu morning, min 24°C on Thu night). Mainly fresh winds. | ||||||||||||||||||||
Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | |||||||||||||||
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 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 7 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | NE 8 | E 17 | E 16 | E 16 | E 15 |
Wave Graph | |||||||||||||||||||||
199 | 207 | 210 | 176 | 153 | 220 | 189 | 145 | 207 | 268 | 280 | 360 | 408 | 456 | 482 | 517 | 517 | 1111 | 1144 | 1101 | 1145 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | on | on | cross-on | cross-on | on | cross-on | cross-on | on | on | on | on | cross-on |
High Tide | 8:04AM0.54m | 5:54PM0.61m | 10:10AM0.59m | 5:15PM0.56m | 11:42AM0.65m | 12:30PM0.71m | 1:05PM0.75m | 1:36PM0.79m | 11:19PM0.41m | 2:05PM0.83m | 00:19AM0.43m | ||||||||||
Low Tide | 12:17PM0.48m | 1:41AM0.22m | 2:38PM0.55m | 2:27AM0.21m | 3:25AM0.19m | 4:27AM0.17m | 5:23AM0.14m | 9:11PM0.40m | 6:10AM0.11m | 9:11PM0.38m | |||||||||||
5:58 | — | — | 5:58 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | |
— | 7:15 | — | — | 7:14 | — | — | 7:14 | — | — | 7:14 | — | — | 7:13 | — | — | 7:13 | — | — | 7:12 | — | |
mm | 1 | — | 2 | 2 | 2 | 6 | — | — | 2 | 1 | — | — | — | — | — | 2 | — | — | — | — | — |
Temp °C | 25 | 26 | 25 | 25 | 25 | 25 | 24 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 24 | 25 | 25 |
Feels °C | 25 | 26 | 25 | 26 | 25 | 24 | 22 | 23 | 23 | 22 | 22 | 22 | 24 | 22 | 22 | 25 | 22 | 24 | 23 | 24 | 23 |
Swell 1 Height (m) Direction Period (s) | S 16 | S 16 | S 15 | S 14 | S 14 | E 13 | E 12 | E 11 | E 12 | E 12 | S 13 | SSW 18 | SSW 18 | SSW 17 | E 16 | E 15 | E 18 | E 17 | E 16 | E 16 | E 15 |
47 | 81 | 107 | 103 | 97 | 84 | 103 | 125 | 139 | 99 | 55 | 112 | 104 | 59 | 125 | 205 | 492 | 1111 | 1144 | 1101 | 1145 | |
Swell 2 Height (m) Direction Period (s) | S 13 | SW 18 | E 12 | E 12 | E 14 | S 14 | SSE 13 | SSE 13 | S 13 | S 12 | SSW 20 | S 13 | S 12 | E 18 | SSW 16 | SSW 19 | SSW 19 | SSW 18 | S 16 | S 16 | SSW 16 |
31 | 12 | 12 | 25 | 37 | 89 | 59 | 58 | 52 | 45 | 75 | 31 | 46 | 54 | 53 | 125 | 115 | 103 | 137 | 132 | 83 | |
Swell 3 Height (m) Direction Period (s) | SW 18 | E 13 | SW 16 | E 15 | E 11 | S 26 | S 11 | S 10 | SSW 22 | SSW 20 | NNW 10 | S 11 | NNW 9 | S 12 | S 12 | E 19 | S 11 | S 11 | S 11 | SE 12 | S 12 |
13 | 3 | 11 | 17 | 22 | 53 | 20 | 19 | 91 | 77 | 9 | 20 | 7 | 25 | 24 | 63 | 9 | 9 | 35 | 5 | 3 | |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 7 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | NE 8 | ENE 8 | NE 8 | NE 8 | NE 8 |
199 | 207 | 210 | 176 | 153 | 220 | 189 | 145 | 207 | 268 | 280 | 360 | 408 | 456 | 482 | 517 | 517 | 477 | 423 | 344 | 297 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 17 | 41 | 17 | 41 | 41 | 41 | 41 | 42 | 41 | 46 | 51 | 41 | 41 | 48 | 41 | 40 | 46 | 17 | 41 | 122 | 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.










