Surf Forecasts:
Keaulanas surf forecast from 22 Aug 2026:
- Best quality surf: Wednesday 26 Aug, 5PM (local time) - 2.5ft (0.8m), 18s period, S swell with offshore winds.
- Most powerful swell: Thursday 27 Aug, 11AM (local time) - 3.5ft (1.1m), 17s period, S swell with 710 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 8PM (local time) - 2.5ft (0.8m), 16s period with SSW swell.
Best Forecast Surf Conditions for Keaulanas this week:
The surf forecast for Keaulanas over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Aug 21) at 8PM. The primary swell is predicted to be 0.8m and 16s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Keaulanas in the next 16 days are 1.1m 17s and forecast to arrive on Thursday (Aug 27) at 11AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 6s period and expected on Thursday (Aug 27) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Fri 21st Aug) | 2.5ft (0.8m) 16s |
| Best Surf | 5PM (Wed 26th Aug) | 2.5ft (0.8m) 18s |
| Most Powerful | 11AM (Thu 27th Aug) | 3.5ft (1.1m) 17s |
Table - best surf conditions forecast for Keaulanas over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on the cards for the next couple weeks at your local break.
Right off the bat, we’ve got an odd one. Friday afternoon (the 21st) you might see a tiny bump of long-period groundswell – we’re talking 0.7 yards from the SW with a 16-second pulse. The wind goes glassy and the water’s sitting at a warm 81°, which is pretty standard for this time of year. The wave energy is weak (310), so it’s just a little something for a longboard. Honestly, it’s not much to write home about, but it’s clean.
Then we hit a real dry spell. From Saturday the 22nd all the way through to Monday the 31st of August, the wind is howling out of the ENE at 15 to 22 mph, making things choppy or at best cross-off. The swell stays small, mostly 0.5 to 0.9 yards, and the surf quality is poor or marginal. It’s a long stretch of nothing special – you’re better off doing something else for over a week.
Now, the standouts in this forecast window land in the first week of September. The real gem looks like Wednesday morning, the 2nd of September. The wind swings around to a light N breeze, and the swell holds at 0.9 yards from the SSW with a 16-second period. The wave energy is moderate (427) and it’s clean. That’s your best bet for a proper session. If you can wait, Thursday morning, the 3rd of September, could be a sneaky one too. It’s smaller at 0.6 yards from the S, but the wind is absolutely glassy – dead calm. Just pure, clean lines for a longboard or a fish.
The very end of the forecast (Saturday the 5th of September) starts to look a little familiar with the trade winds returning, but that Wednesday and Thursday are the ones to circle. For Keaulanas, the best wave direction is from the west, and these SSW and S swells are close enough to work. Just keep in mind it’s a beach and reef setup, and it can get a crowd. With the small, clean conditions, it’ll be worth the paddle.
Keep your eyes on the sky and I’ll see you out there. Rusty.
Short Range ForecastMostly dry. Warm (max 28°C on Sat morning, min 26°C on Fri night). Winds increasing (calm on Fri afternoon, fresh winds from the ENE by Sun afternoon). | Days 5-7 Weather SummaryMostly dry. Warm (max 28°C on Mon afternoon, min 24°C on Wed night). Wind will be generally light. | |||||||||||||||||||
Fri 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | ||||||||||||||
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) | SW 16 | SSW 16 | SSW 16 | SW 16 | SW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | S 18 | S 19 | S 17 | S 17 | S 16 |
Wave Graph  | ||||||||||||||||||||
 kJ | 261 | 322 | 326 | 251 | 245 | 201 | 191 | 186 | 166 | 156 | 125 | 147 | 196 | 121 | 215 | 395 | 365 | 710 | 540 | 582 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | off | off | cross-off | cross-off | cross-off |
High Tide | 11:07PM0.20m | 1:05PM0.61m | 00:41AM0.22m | 1:43PM0.64m | 1:27AM0.24m | 2:17PM0.67m | 2:05AM0.28m | 2:47PM0.68m | 2:41AM0.32m | 3:14PM0.68m | 3:17AM0.36m | 3:40PM0.66m | 3:54AM0.41m | |||||||
Low Tide | 9:33PM0.20m | 9:13PM0.18m | 5:44AM0.11m | 9:21PM0.17m | 6:39AM0.09m | 9:34PM0.15m | 7:24AM0.08m | 9:50PM0.14m | 8:06AM0.07m | 10:06PM0.13m | 8:47AM0.08m | 10:23PM0.11m | ||||||||
 |  |  | | | | |  | | | | | | | | | | | | | |
 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — |
 | 6:58 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 27 | 28 | 28 | 26 | 27 | 27 | 26 | 27 | 28 | 26 | 27 | 28 | 26 | 27 | 27 | 25 | 27 | 27 | 25 |
Feels °C | 31 | 30 | 28 | 27 | 26 | 25 | 25 | 25 | 26 | 27 | 26 | 26 | 27 | 26 | 25 | 25 | 24 | 27 | 26 | 24 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SSW 16 | SSW 16 | SW 16 | SW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 12 | SSW 16 | SSW 15 | SSW 14 | S 18 | SSW 13 | S 17 | S 17 | S 16 |
| kJ | 261 | 322 | 326 | 251 | 245 | 201 | 191 | 186 | 166 | 156 | 125 | 119 | 196 | 121 | 215 | 395 | 181 | 710 | 540 | 582 |
Swell 2 Height (m) Direction Period (s) | NNE 7 | NE 7 | NE 7 | W 11 | WNW 12 | SSE 13 | WNW 11 | WNW 12 | SSE 12 | SSE 12 | SSW 17 | SSE 9 | SSW 12 | SSW 12 | S 18 | SSW 13 | S 19 | S 12 | S 12 | NW 9 |
| kJ | 42 | 44 | 44 | 57 | 125 | 139 | 78 | 94 | 86 | 48 | 93 | 64 | 81 | 81 | 165 | 133 | 365 | 101 | 71 | 13 |
Swell 3 Height (m) Direction Period (s) | W 10 | W 10 | W 10 | SSE 12 | SSE 12 | WNW 11 | SSE 13 | ESE 8 | NW 11 | NW 10 | SSE 12 | SSW 16 | SSE 7 | SSE 9 | SSE 12 | NW 10 | NE 5 | NW 10 | NW 9 | N 8 |
| kJ | 49 | 50 | 51 | 50 | 50 | 78 | 68 | 23 | 58 | 27 | 47 | 147 | 20 | 35 | 55 | 28 | 23 | 24 | 23 | 10 |
Wind waves Height (m) Direction Period (s) | — | ENE 6 | — | ENE 7 | ENE 7 | NE 6 | NE 6 | NE 6 | NE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | NE 5 | NE 5 | E 6 | ENE 6 | ENE 6 | ENE 6 |
| kJ | — | 44 | — | 57 | 88 | 70 | 62 | 44 | 47 | 63 | 46 | 41 | 55 | 49 | 28 | 31 | 113 | 22 | 21 | 32 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 0 | 5 | 6 | 5 | 9 | 160 | 5 | 5 | 5 | 0 | 2 | 5 | 2 | 2 | 0 | 0 | 2 | 11 | 2 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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Information about the Keaulanas Surf forecast
The above surf forecast table for Keaulanas provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Keaulanas can be found by selecting the local surf guide option on the grey menu. Our Keaulanas 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 (Keaulanas) 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 Keaulanas 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.
Keaulanas is 7 km (4 miles) from Makakilo City. If you plan a vacation in Oahu, look for hotels and other accommodation in Makakilo City. Makakilo City has rooms for a wide range of budgets as well as car hire and transport links.
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