Surf Forecasts:
Kailua Beach surf forecast from 8 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 5PM (local time) - 5.5ft (1.7m), 11s period, ENE swell with offshore winds.
- Most powerful swell: Tuesday 8 Sep, 2PM (local time) - 6ft (1.8m), 11s period, ENE swell with 802 kJ wave energy.
- Next surfable swell (1★+): Tuesday 8 Sep, 5PM (local time) - 5.5ft (1.7m), 11s period with ENE swell.
Best Forecast Surf Conditions for Kailua Beach this week:
The surf forecast for Kailua Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Sep 08) at 5PM. The primary swell is predicted to be 1.7m and 11s period with a secondary swell of 0.5m and 14s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Kailua Beach in the next 16 days are 1.8m 11s and forecast to arrive on Tuesday (Sep 08) at 2PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 9s period and expected on Tuesday (Sep 08) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5PM (Tue 8th Sep) | 5.5ft (1.7m) 11s |
| Best Surf | 5PM (Tue 8th Sep) | 5.5ft (1.7m) 11s |
| Most Powerful | 2PM (Tue 8th Sep) | 6ft (1.8m) 11s |
Table - best surf conditions forecast for Kailua Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get straight into it for Kailua Beach. The outlook is a real mixed bag, and honestly, it’s a bit of a frustrating one for the paddle crew.
The action kicks off on Tuesday morning, September 8th. We’ve got a clean 6ft NE groundswell rolling in, with a solid 11-second period, which means some decent energy. The combined energy of all swells directed here is a moderate 799. The water temp is 81°, which is bang on average for this time of year, so no wetsuit worries. The wind is blowing SSW at 19 mph, which is a fresh offshore breeze, so the waves will be clean and lined up. This is the standout window of the whole 16-day stretch. Tuesday afternoon keeps it going with a 6ft swell from the ENE, still offshore at 16 mph, and the energy kicks up a notch to 821. This is as good as it gets for Kailua Beach.
But don’t get too excited. Wednesday the 9th sees the wind clocking onshore from the ENE, and the quality drops off a cliff. The swell is down to 4ft with a short 9-second period, and the energy is 440. By the afternoon it’s even worse. From Thursday the 10th all the way through to the end of the forecast on Wednesday, September 23rd, it’s a long, grim stretch. The wind is almost constantly cross-onshore or onshore from the ENE, ranging from 9 mph to a strong 25 mph. The swell is all over the place, mostly short-period junk between 6 and 10 seconds, with heights bouncing between 2ft and 7ft. The combined energy stays low, mostly in the 100-200 range, which is weak. The waves will be choppy, lumpy, and messy. With the wind and poor quality, this setup at a beach break would honestly be more interesting for kite surfing than paddle surfing.
The only real standout is the first two days—Tuesday, September 8th. If you’re a surfer, that’s your window. The rest of the 16 days is a write-off for quality waves at Kailua Beach. Kailua Beach is a point break that’s fairly consistent, and it’s exposed to the NE, which is the optimum direction. The offshore wind on Tuesday will make it a dream, but crowds are likely, so get there early.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Wed night. Warm (max 28°C on Tue morning, min 25°C on Thu afternoon). Winds decreasing (fresh winds from the SSW on Tue morning, calm by Wed morning). | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Sun night. Warm (max 26°C on Fri afternoon, min 25°C on Fri morning). Wind will be generally light. | ||||||||||||||||||||
Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | |||||||||||||||
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 11 | ENE 11 | ENE 10 | ENE 9 | E 13 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | E 7 | ENE 11 | E 10 | ENE 10 | ENE 10 | NNE 9 | NE 9 | NE 9 | NE 9 | NE 8 | NE 8 | NE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 785 | 724 | 378 | 211 | 168 | 237 | 273 | 258 | 158 | 97 | 297 | 265 | 160 | 125 | 94 | 107 | 107 | 88 | 84 | 69 | 53 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | on | on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | on | on | on | on | cross-on |
High Tide | 1:27PM0.87m | 1:08AM0.54m | 1:55PM0.86m | 1:52AM0.61m | 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 | ||||||||
Low Tide | 8:04PM0.27m | 7:02AM0.11m | 8:22PM0.23m | 7:46AM0.14m | 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 | ||||||||
 | |  |  | |  |  | |  | | | | | | | | |  | | | | |
 | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — |
 | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — |
mm | — | — | — | — | — | 5 | 1 | — | — | — | — | — | — | — | — | — | — | 4 | 1 | — | 3 |
Temp °C | 28 | 28 | 27 | 27 | 27 | 27 | 26 | 26 | 25 | 25 | 26 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 26 | 26 | 26 |
Feels °C | 27 | 27 | 30 | 30 | 29 | 30 | 26 | 26 | 25 | 25 | 26 | 25 | 25 | 26 | 25 | 25 | 27 | 25 | 27 | 27 | 27 |
Swell 1 Height (m) Direction Period (s) | ENE 11 | ENE 11 | ENE 10 | ENE 9 | ENE 8 | E 13 | E 12 | E 12 | E 11 | E 11 | NNE 8 | NNE 8 | ENE 10 | NNE 9 | NNE 9 | NE 9 | NE 9 | NE 9 | NE 8 | NE 8 | NE 8 |
| kJ | 785 | 724 | 378 | 211 | 140 | 117 | 104 | 72 | 94 | 89 | 50 | 50 | 160 | 96 | 94 | 107 | 107 | 88 | 84 | 69 | 53 |
Swell 2 Height (m) Direction Period (s) | SSW 15 | E 14 | E 14 | E 13 | E 13 | NW 10 | NW 9 | NW 9 | SSW 12 | NNE 8 | SSW 15 | SSW 12 | NE 8 | SW 16 | E 5 | ENE 9 | ENE 8 | ENE 8 | ESE 8 | SSW 22 | ESE 7 |
| kJ | 75 | 97 | 132 | 168 | 168 | 58 | 28 | 20 | 14 | 56 | 22 | 13 | 70 | 10 | 17 | 26 | 14 | 6 | 7 | 45 | 9 |
Swell 3 Height (m) Direction Period (s) | NNW 12 | SSW 15 | NW 9 | NW 9 | NW 8 | SSW 13 | SSW 13 | SSW 13 | NW 8 | SSW 16 | NW 9 | SSW 17 | SSW 16 | SW 13 | ENE 9 | SSW 15 | SW 15 | SSW 14 | SW 14 | SW 14 | SW 21 |
| kJ | 14 | 73 | 52 | 61 | 57 | 34 | 33 | 32 | 10 | 26 | 3 | 29 | 24 | 7 | 46 | 21 | 8 | 20 | 8 | 8 | 18 |
Wind waves Height (m) Direction Period (s) | S 10 | S 9 | — | — | — | ENE 7 | ENE 7 | ENE 7 | ENE 7 | E 7 | ENE 11 | E 10 | — | ENE 10 | — | E 6 | E 6 | E 5 | E 5 | E 5 | ENE 5 |
| kJ | 408 | 150 | — | — | — | 237 | 273 | 258 | 158 | 97 | 297 | 265 | — | 125 | — | 44 | 67 | 34 | 25 | 22 | 34 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 137 | 0 | 0 | 16 | 17 | 16 | 41 | 18 | 17 | 17 | 17 | 25 | 41 | 17 | 17 | 40 | 17 | 17 | 17 | 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.
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