Surf Forecasts:
Kailua Beach surf forecast from 1 Sep 2026:
- Most powerful swell: Saturday 5 Sep, 11PM (local time) - 8ft (2.4m), 14s period, ENE swell with 2,221 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 14s and forecast to arrive on Saturday (Sep 05) 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 0.8m 12s period and expected on Friday (Sep 04) at 8AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Sat 5th Sep) | 8ft (2.4m) 14s |
Table - best surf conditions forecast for Kailua Beach over the next 16 days.
The Lowdown
Alright, grab a coffee and listen up. This is a tough one.
Looking at the whole 16-day window for Kailua Beach, it's a pretty grim picture for surfers. The wind is our main enemy here, blowing hard from the east-northeast, and it's almost always onshore or cross-onshore, just trashing the surface. The wave energy is moderate to very strong, hitting 412 to 1901, but with that wind, it's all just a bumpy, choppy mess. The water's a warm 81°, which is normal for the time of year, but you wouldn't know it from the lack of waves.
The first real chance of anything comes on Monday, the 7th of September. The wind drops back to a gentle breeze, and it's still cross-onshore, but the swell is a solid 7ft to 7ft from the east with a long period of 13 seconds. That's a lot of energy (1295 to 1538), but the comment says "marginal surf forecast or questionable tide conditions." A long period swell like that, 13 seconds, can be powerful but tends to straighten out on a beach break, so you'd be hunting for a rip to get out. It's not great, but it's the best we've got.
Tuesday the 8th of September is similar. Same gentle breeze, same cross-onshore wind, swell from the east-northeast around 6ft to 7ft with a 10 to 12 second period. Energy is still strong (829 to 1202), but still just marginal. The crowds are listed as "sometimes," so you might actually have some company for this so-so session.
Honestly, after that, it falls apart again. The wind picks back up and the swell drops. There's a nasty gap from the 9th of September all the way through the 16th of September with nothing but "poor surf conditions" and onshore winds. The combined energy stays low, mostly under 500, and the period is short and weak. Not worth paddling out for.
The standout, if you can call it that, is Monday the 7th of September morning. The swell is 7ft from the east at 13 seconds, with a gentle breeze. It's the cleanest the wind will be all period, and the wave energy is high. It's the only time I'd even consider it. But be warned, at 7ft, it's getting into the "too big for beginners" territory, and the long period will make it fat and tricky on the bank.
Don't hold your breath for this one. The forecast can change, but right now, it's a lean run.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Tue night. Warm (max 26°C on Tue morning, min 25°C on Tue night). Mainly strong winds. | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Sat night. Warm (max 26°C on Sat morning, min 25°C on Fri morning). Winds decreasing (strong winds from the ENE on Fri morning, light winds from the ENE by Sun night). | ||||||||||||||||||||
Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 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) | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 7 | E 14 | ENE 13 | ENE 13 | ENE 13 | ENE 13 | ENE 12 | ENE 12 | E 13 | E 13 | ENE 12 |
Wave Graph  | |||||||||||||||||||||
 kJ | 412 | 483 | 527 | 604 | 489 | 561 | 639 | 558 | 621 | 574 | 468 | 515 | 1452 | 1605 | 1960 | 1901 | 1485 | 1047 | 1538 | 1295 | 1347 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | on | cross-on | on | on | cross-on | on | on | cross-on | cross-on | cross-on | cross-on |
High Tide | 4:02PM0.61m | 6:31AM0.67m | 3:59PM0.56m | 8:17AM0.68m | 10:21AM0.72m | 11:33AM0.78m | 12:19PM0.83m | 11:14PM0.40m | 12:55PM0.86m | 00:19AM0.47m | |||||||||||
Low Tide | 10:57AM0.42m | 11:01PM0.13m | 12:04PM0.50m | 11:40PM0.13m | 00:39AM0.15m | 2:15AM0.17m | 4:01AM0.16m | 7:47PM0.35m | 5:17AM0.13m | 7:50PM0.31m | |||||||||||
 | |  |  | |  |  | |  | | | | | | | | | | | |  | |
 | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — |
 | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — |
mm | — | — | 2 | 2 | 1 | — | — | — | — | — | — | — | — | — | 3 | 1 | — | — | — | — | 1 |
Temp °C | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 26 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 |
Feels °C | 24 | 25 | 25 | 25 | 24 | 24 | 22 | 23 | 21 | 21 | 21 | 22 | 26 | 25 | 26 | 26 | 26 | 27 | 27 | 27 | 29 |
Swell 1 Height (m) Direction Period (s) | SSW 18 | SSW 18 | S 17 | S 16 | S 16 | E 13 | S 14 | E 12 | E 14 | E 14 | E 14 | E 14 | S 11 | S 12 | SSW 11 | SSW 11 | SW 11 | ENE 12 | E 13 | E 13 | ENE 12 |
| kJ | 107 | 107 | 93 | 130 | 79 | 123 | 65 | 107 | 260 | 289 | 390 | 515 | 116 | 99 | 69 | 48 | 31 | 1047 | 1538 | 1295 | 1347 |
Swell 2 Height (m) Direction Period (s) | S 9 | S 12 | S 10 | E 14 | E 14 | S 15 | SE 13 | SSE 12 | SSE 12 | S 12 | S 11 | S 12 | NNE 10 | NNE 10 | N 8 | SSE 12 | SSW 19 | E 15 | SSW 16 | SSW 17 | S 15 |
| kJ | 7 | 11 | 8 | 33 | 66 | 69 | 44 | 85 | 150 | 171 | 85 | 169 | 20 | 31 | 12 | 27 | 71 | 159 | 91 | 95 | 115 |
Swell 3 Height (m) Direction Period (s) | SW 14 | E 15 | E 14 | SSE 10 | S 12 | S 11 | S 10 | SSW 14 | NW 9 | N 9 | S 13 | NNE 11 | SSW 18 | SSE 10 | SSE 10 | SSW 16 | SSE 10 | SSW 18 | SW 11 | S 10 | S 9 |
| kJ | 8 | 4 | 14 | 9 | 23 | 9 | 8 | 38 | 3 | 2 | 78 | 12 | 30 | 10 | 9 | 25 | 9 | 109 | 19 | 18 | 25 |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 7 | ENE 7 | ENE 13 | ENE 13 | ENE 13 | ENE 13 | ENE 12 | — | — | — | — |
| kJ | 412 | 483 | 527 | 604 | 489 | 561 | 639 | 558 | 621 | 574 | 468 | 346 | 1452 | 1605 | 1960 | 1901 | 1485 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 41 | 122 | 41 | 50 | 50 | 122 | 123 | 125 | 52 | 52 | 51 | 41 | 41 | 46 | 17 | 17 | 17 | 17 | 41 | 17 | 11 |
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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