Surf Forecasts:
Kailua Beach surf forecast from 10 Sep 2026:
- Most powerful swell: Thursday 17 Sep, 8AM (local time) - 6ft (1.9m), 8s period, ENE swell with 498 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 1.9m 8s and forecast to arrive on Thursday (Sep 17) at 8AM. 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 19s period and expected on Wednesday (Sep 16) at 5AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8AM (Thu 17th Sep) | 6ft (1.9m) 8s |
Table - best surf conditions forecast for Kailua Beach over the next 16 days.
The Lowdown
Alright, let’s get into the surf at Kailua Beach. This is a point break that catches the NE swell. The water temp is about 80°, which is pretty standard for the season, nothing weird going on.
Right from the start, it’s a rough go. Thursday September 10th brings a 5ft swell from the ENE, but the period is only 7 seconds and the wind is blasting cross-onshore at 16 mph. That means choppy, blown-out slop. And honestly, that’s the story for days. We get some onshore wind here and there, but the swell drops to 3ft to 3ft with short, weak energy. The combined energy numbers stay low to moderate—stuck between 101 and 312—but it’s all “poor surf conditions.” No joy.
There’s a big dry spell. From September 10th all the way through the 23rd, it’s just one bad report after another. The wind stays strong, the swell stays short-period and messy, and there’s nothing worth paddling out for.
But then, on Thursday September 24th, we finally get a break. The morning goes glassy—dead calm—with a clean 4ft groundswell from the east, a period of 10 seconds. The afternoon is also glassy with a 4ft swell. Combined energy is a moderate 313 to 332, but the total absence of wind makes it the only real standout in the whole forecast. This is the only time that “expect good surf conditions” shows up. If you’re waiting for a wave, that Thursday morning and afternoon is your shot.
Just know that this spot can get crowded sometimes. The 4ft swell at 10 seconds is a nice groundswell—it’ll have some power and shape, but sets will be spaced out. For beginners, that size is fine.
So that’s the deal: a long, ugly stretch with one golden window on the 24th of September. Hope it holds, and get on it when it’s glassy.
Rusty.
Short Range ForecastSome drizzle, heaviest during Thu morning. Warm (max 26°C on Thu morning, min 24°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Tue night. Warm (max 26°C on Mon afternoon, min 24°C on Sun morning). Wind will be generally light. | ||||||||||||||||||||
Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | |||||||||||||||
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 7 | ENE 7 | ENE 7 | ENE 7 | E 11 | E 10 | ENE 10 | NE 9 | NNE 9 | NNE 9 | NE 9 | NE 9 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 7 | ENE 8 | ENE 8 | ENE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 261 | 225 | 181 | 128 | 238 | 216 | 128 | 125 | 135 | 135 | 115 | 123 | 118 | 95 | 131 | 96 | 111 | 121 | 306 | 356 | 414 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | on | cross-on | on | on | cross-on | on | on | on | on | on | on | cross-on | on | cross-on |
High Tide | 2:20PM0.82m | 2:33AM0.67m | 2:42PM0.77m | 3:12AM0.71m | 3:01PM0.71m | 3:52AM0.73m | 3:16PM0.65m | 4:32AM0.72m | 3:26PM0.60m | 5:15AM0.70m | 3:27PM0.55m | 6:09AM0.67m | 3:00PM0.53m | ||||||||
Low Tide | 8:42PM0.19m | 8:26AM0.19m | 9:02PM0.16m | 9:06AM0.25m | 9:22PM0.14m | 9:44AM0.32m | 9:43PM0.13m | 10:23AM0.39m | 10:04PM0.13m | 11:06AM0.45m | 10:26PM0.15m | 12:06PM0.50m | 10:52PM0.18m | ||||||||
 |  |  |  | |  | | | | | | | | | | | |  | | |  | |
 | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — |
 | — | 6:37 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — |
mm | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | 2 |
Temp °C | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 26 | 26 | 26 | 26 | 26 |
Feels °C | 26 | 27 | 25 | 24 | 25 | 26 | 26 | 25 | 26 | 25 | 25 | 25 | 25 | 27 | 26 | 26 | 27 | 28 | 28 | 27 | 27 |
Swell 1 Height (m) Direction Period (s) | E 12 | E 12 | E 11 | E 11 | E 11 | NE 8 | NNE 9 | NE 9 | NNE 9 | NNE 9 | NE 9 | NE 9 | NE 8 | NE 8 | NE 6 | NE 8 | ESE 7 | E 11 | SW 18 | SW 18 | E 10 |
| kJ | 104 | 72 | 94 | 89 | 238 | 57 | 96 | 115 | 135 | 135 | 115 | 123 | 118 | 95 | 46 | 96 | 18 | 58 | 80 | 79 | 65 |
Swell 2 Height (m) Direction Period (s) | NW 8 | NW 9 | SSW 12 | NNE 8 | NNE 8 | SSW 15 | SSW 16 | SW 16 | SSW 13 | ENE 9 | ENE 9 | SSW 14 | ESE 8 | ESE 8 | NE 8 | ESE 8 | E 12 | E 7 | NW 9 | S 12 | SW 17 |
| kJ | 20 | 13 | 14 | 44 | 74 | 22 | 24 | 10 | 17 | 26 | 25 | 20 | 6 | 6 | 58 | 22 | 44 | 25 | 3 | 3 | 76 |
Swell 3 Height (m) Direction Period (s) | SSW 13 | SSW 13 | SSW 16 | SSW 16 | SSW 15 | SSE 8 | SSE 8 | SW 13 | NW 15 | SSW 15 | SW 15 | ESE 8 | SW 14 | SSW 22 | ESE 7 | E 12 | SSW 20 | SW 19 | SW 12 | NW 9 | SE 11 |
| kJ | 33 | 32 | 26 | 26 | 22 | 7 | 6 | 7 | 8 | 21 | 8 | 7 | 8 | 45 | 5 | 26 | 37 | 95 | 5 | 3 | 5 |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 7 | ENE 7 | — | E 10 | ENE 10 | ENE 10 | ENE 9 | E 4 | E 4 | ENE 4 | E 8 | — | NE 8 | — | NE 8 | NE 7 | ENE 8 | ENE 8 | ENE 8 |
| kJ | 261 | 225 | 181 | 128 | — | 216 | 128 | 125 | 84 | 9 | 13 | 14 | 21 | — | 131 | — | 111 | 121 | 306 | 356 | 414 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 41 | 41 | 17 | 17 | 17 | 17 | 41 | 17 | 17 | 17 | 17 | 25 | 17 | 17 | 17 | 17 | 17 | 17 | 41 | 41 | 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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