Surf Forecasts:
Keaulanas surf forecast from 28 Aug 2026:
- Best quality surf: Friday 28 Aug, 5AM (local time) - 3.5ft (1.0m), 16s period, S swell with offshore winds.
- Most powerful swell: Friday 28 Aug, 2AM (local time) - 3.5ft (1.1m), 16s period, S swell with 582 kJ wave energy.
- Next surfable swell (1★+): Friday 28 Aug, 5AM (local time) - 3.5ft (1.0m), 16s period with S 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 28) at 5AM. The primary swell is predicted to be 1.0m and 16s period with a secondary swell of 0.4m and 11s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Keaulanas in the next 16 days are 1.1m 16s and forecast to arrive on Friday (Aug 28) at 2AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 7s period and expected on Monday (Aug 31) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Fri 28th Aug) | 3.5ft (1.0m) 16s |
| Best Surf | 5AM (Fri 28th Aug) | 3.5ft (1.0m) 16s |
| Most Powerful | 2AM (Fri 28th Aug) | 3.5ft (1.1m) 16s |
Table - best surf conditions forecast for Keaulanas over the next 16 days.
The Lowdown
Alright surfers, Rusty here with a look at the upcoming swell for a spot that’s had some mixed vibes lately. Let’s cut through the chatter and get straight to it.
Alright, so the overall pattern at Keaulanas is a bit of a slow burn. We’re looking at a stretch of small to chest-high surf for the next few days, but the wind is the real story. For the first half of the outlook, a lot of it is choppy with a cross-off breeze, which is putting a real damper on things. Don't get too excited for Friday the 28th through the end of the month. There’s a little pulse on Friday morning, a clean 3-foot swell from the south, but that ENE wind is too strong and not blowing straight offshore to make it truly glassy.
We’ve gotta wait for the real deal. Starting Thursday, September 3rd, things start to clean up. We see gentle offshore winds on the morning of the 3rd, with a 2.5-foot south swell, and that energy is nice and clean. The wind stays light and favorable through Friday the 4th too. But the true standout window fires up on Sunday, September 6th. We get a glassy, south-southwest groundswell with a period of 16 seconds and 2-foot on the morning, building to 3-foot by the afternoon. The energy jumps up, and with the wind going totally glassy, this will be the session to be out for. Expert surfers will love it.
If that’s not enough, the following day, Monday, September 7th, looks like the absolute best of the whole run. We’ve got a 3.5-foot swell from the SSW with a 16-second period, and the energy reading is strong. Glassy conditions in the morning and clean and light in the afternoon. This is a proper solid groundswell, nothing too wild for most, but it’ll be pushing the limits for beginners. The water temp is about average for the time of year, so no wetsuit worries.
Later in the second week, from the 8th onward, the swell hangs in at around 3 to 3.5 feet, with the wind staying clean and offshore or glassy on the mornings. The energy drops a bit, but the quality remains high for a good dawny. Still, that Sunday-Monday window is the one to circle on the calendar.
Short Range ForecastMostly dry. Warm (max 28°C on Fri afternoon, min 25°C on Thu night). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 29°C on Tue afternoon, min 25°C on Sun night). Wind will be generally light. | ||||||||||||||||||
Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | ||||||||||||||
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) | S 16 | S 14 | S 14 | S 14 | S 13 | S 13 | SSW 17 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | S 19 | SSW 18 | S 18 | S 17 | S 16 | S 16 | S 15 |
Wave Graph  | |||||||||||||||||||
 kJ | 582 | 334 | 399 | 229 | 219 | 165 | 186 | 226 | 162 | 199 | 191 | 183 | 273 | 333 | 311 | 465 | 427 | 406 | 279 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 3:54AM0.41m | 4:06PM0.63m | 4:33AM0.46m | 4:30PM0.57m | 5:15AM0.50m | 4:54PM0.51m | 6:01AM0.54m | 5:16PM0.44m | 6:54AM0.57m | 5:35PM0.37m | 8:00AM0.58m | 5:33PM0.31m | |||||||
Low Tide | 10:23PM0.11m | 9:29AM0.11m | 10:41PM0.10m | 10:14AM0.14m | 11:00PM0.09m | 11:03AM0.19m | 11:21PM0.08m | 12:00PM0.24m | 11:44PM0.07m | 1:15PM0.28m | 00:13AM0.07m | 3:27PM0.30m | 00:49AM0.08m | ||||||
 |  | | |  | |  | | | | | | | | | | | | | |
 | — | 6:13 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — |
 | 6:52 | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — | — | 6:47 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 27 | 28 | 25 | 27 | 28 | 26 | 27 | 27 | 26 | 27 | 28 | 26 | 28 | 29 | 26 | 28 | 29 | 26 |
Feels °C | 24 | 26 | 26 | 24 | 25 | 26 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 28 | 28 | 26 | 28 | 29 | 26 |
Swell 1 Height (m) Direction Period (s) | S 16 | S 14 | S 14 | S 14 | S 13 | S 13 | S 12 | SSW 16 | S 12 | NE 7 | SSW 15 | SSW 14 | S 19 | NE 8 | S 18 | NE 8 | NE 8 | S 16 | NE 8 |
| kJ | 582 | 334 | 399 | 229 | 219 | 165 | 103 | 226 | 100 | 89 | 191 | 183 | 273 | 110 | 311 | 135 | 111 | 406 | 108 |
Swell 2 Height (m) Direction Period (s) | ESE 7 | SSW 11 | SSW 19 | SW 19 | SW 18 | SSW 17 | SSW 17 | SSW 12 | SSW 16 | SSW 15 | S 11 | S 11 | S 10 | SSW 18 | S 12 | S 17 | S 16 | SSE 11 | S 15 |
| kJ | 9 | 39 | 35 | 91 | 80 | 115 | 186 | 46 | 162 | 199 | 85 | 82 | 53 | 333 | 77 | 465 | 427 | 37 | 279 |
Swell 3 Height (m) Direction Period (s) | NW 9 | WNW 8 | WNW 8 | SSW 10 | W 11 | E 13 | W 12 | SSE 12 | W 11 | S 11 | S 8 | SSW 19 | SW 13 | SSW 14 | SW 14 | SSW 14 | SSW 14 | SW 13 | S 11 |
| kJ | 12 | 7 | 7 | 18 | 9 | 13 | 11 | 48 | 9 | 84 | 12 | 123 | 88 | 111 | 53 | 111 | 74 | 27 | 58 |
Wind waves Height (m) Direction Period (s) | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 7 | NE 7 | NE 7 | ENE 7 | NE 7 | NE 8 | NE 7 | ENE 8 | NE 8 | ENE 8 | — | NE 8 | ENE 8 |
| kJ | 47 | 46 | 44 | 62 | 54 | 85 | 106 | 112 | 135 | 141 | 189 | 183 | 137 | 211 | 149 | 217 | — | 108 | 169 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 6 | 0 | 160 | 2 | 5 | 11 | 5 | 2 | 11 | 0 | 5 | 5 | 0 | 2 | 5 | 2 | 2 | 2 | 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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