Surf Forecasts:
Kailua Beach surf forecast from 16 Aug 2026:
- Most powerful swell: Sunday 16 Aug, 2AM (local time) - 15ft (4.5m), 10s period, E swell with 3,370 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 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 10s period and expected on Sunday (Aug 16) at 8AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Sun 16th Aug) | 15ft (4.5m) 10s |
Table - best surf conditions forecast for Kailua Beach over the next 16 days.
The Lowdown
Alright, listen up. It’s Rusty here. Gotta be straight with you—this outlook is a tough one to write. We’re looking at a 16-day window for Kailua Beach, and the models are showing a whole lot of nothing for a long, long time.
The first recommendation doesn't even pop up until the 30th of August, and even then, it's a marginal call. That means we're talking about a solid stretch of poor surf and bad vibes for the next couple of weeks. With the trade winds howling out of the east-northeast and whipping up the ocean into a messy, cross-onshore chop, it’s just going to be a washing machine out there.
The water temp is sitting at a normal 81°F, which is about average for the time of year, so at least it won’t be cold while you’re getting blown off your board.
So, let’s break down the long grind ahead. This whole first stretch is a write-off. The swell is small, the wind is ruining what little is there, and the energy readings are weak. We're seeing combined energy values in the low hundreds—like 112 to 293—which tells you there's just no power in the water. The periods are short, mostly in that 6 to 8 second range, so it's all windswell and no push. It's not even worth paddling out.
The only blip of interest comes at the very end. On the morning of Sunday, the 30th, there’s finally a pulse of energy, coming from the east with a period of 15 seconds. That’s proper groundswell. The combined energy jumps to 1537, which is moderate but over four times stronger than anything we’ve seen. The wind is light and offshore, which will make it glassy and clean—a huge positive. This is the standout session if you’re willing to wait. The swell is around 6ft, which is solid, and it’s a point break, so it should handle that long-period energy well and line up nicely. It could be a bit tricky with the long period, but it's the only show in town.
The conditions improve slightly in the first week of September, with surf dropping back down and more of those moderate onshore breezes, so it doesn’t look like we’ll get another day like the 30th. Don't sleep on that Sunday morning; it's the one to chase. For everything else, keep the boards in the car and the wax in the bag.
Rusty
Short Range ForecastHeavy rain (total 61mm), heaviest during Sun morning. Warm (max 26°C on Sat afternoon, 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 5-7 Weather SummaryMostly dry. Warm (max 26°C on Thu afternoon, min 24°C on Tue night). Wind will be generally light. | |||||||||||||||||||
Sat 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | ||||||||||||||
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 9 | E 10 | E 9 | E 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 5 | E 8 | ENE 8 | ENE 8 | E 8 | ENE 7 | E 7 | E 8 | NNE 6 | NE 7 |
Wave Graph | ||||||||||||||||||||
2746 | 3370 | 1417 | 887 | 438 | 292 | 245 | 168 | 178 | 112 | 102 | 140 | 183 | 155 | 72 | 118 | 53 | 33 | 26 | 59 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on | on | on | on | on | cross-on |
High Tide | 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 | 12:09PM0.69m | ||||||||||
Low Tide | 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 | 3:54AM0.21m | ||||||||||
— | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | |
7:00 | — | — | 7:00 | — | — | 6:59 | — | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — | — | 6:55 | — | |
mm | 2 | 10 | 36 | 9 | 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 25 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 26 | 26 |
Feels °C | 22 | 21 | 23 | 26 | 25 | 25 | 25 | 24 | 25 | 24 | 25 | 26 | 26 | 27 | 26 | 28 | 27 | 27 | 28 | 29 |
Swell 1 Height (m) Direction Period (s) | S 13 | S 14 | SSE 10 | SSE 8 | ENE 8 | S 14 | S 14 | S 13 | S 13 | S 13 | S 13 | NE 7 | S 12 | E 8 | NE 6 | E 7 | E 7 | NNE 6 | NNE 6 | NE 7 |
31 | 63 | 209 | 112 | 438 | 103 | 65 | 55 | 54 | 30 | 29 | 17 | 11 | 80 | 40 | 67 | 53 | 21 | 26 | 59 | |
Swell 2 Height (m) Direction Period (s) | NNW 9 | NNW 9 | S 16 | S 16 | S 7 | SSE 6 | S 6 | E 9 | SW 17 | NE 8 | N 8 | NNE 6 | SSE 9 | NE 6 | SSW 18 | NNE 6 | NNE 6 | ENE 7 | E 7 | ESE 8 |
7 | 8 | 83 | 46 | 25 | 7 | 6 | 15 | 11 | 9 | 1 | 8 | 8 | 40 | 31 | 35 | 34 | 26 | 24 | 24 | |
Swell 3 Height (m) Direction Period (s) | S 16 | S 18 | NNW 8 | S 13 | S 13 | N 8 | N 7 | S 5 | N 7 | SE 6 | SW 18 | S 12 | SW 16 | S 12 | S 11 | SSW 18 | SSW 17 | E 8 | E 8 | SSW 16 |
5 | 25 | 7 | 30 | 56 | 1 | 1 | 1 | 1 | 1 | 12 | 11 | 11 | 11 | 10 | 30 | 27 | 33 | 12 | 50 | |
Wind waves Height (m) Direction Period (s) | ENE 9 | E 10 | E 9 | E 8 | — | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 5 | E 8 | ENE 8 | ENE 8 | E 8 | ENE 7 | — | — | — | — |
2746 | 3370 | 1417 | 887 | — | 292 | 245 | 168 | 178 | 112 | 102 | 140 | 183 | 155 | 72 | 118 | — | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 206 | 153 | 54 | 16 | 17 | 41 | 41 | 17 | 41 | 17 | 17 | 41 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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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.











