Surf Forecasts:
Keaulanas surf forecast from 9 Aug 2026:
- Best quality surf: Thursday 13 Aug, 2AM (local time) - 4.5ft (1.4m), 16s period, S swell with offshore winds.
- Most powerful swell: Thursday 13 Aug, 2AM (local time) - 4.5ft (1.4m), 16s period, S swell with 1,029 kJ wave energy.
- Next surfable swell (1★+): Saturday 8 Aug, 8PM (local time) - 1.5ft (0.5m), 18s period with SW 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 Saturday (Aug 08) at 8PM. The primary swell is predicted to be 0.5m and 18s period with a secondary swell of 0.6m and 13s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Keaulanas in the next 16 days are 1.4m 16s and forecast to arrive on Thursday (Aug 13) at 2AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.1m 8s period and expected on Saturday (Aug 15) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Sat 8th Aug) | 1.5ft (0.5m) 18s |
| Best Surf | 2AM (Thu 13th Aug) | 4.5ft (1.4m) 16s |
| Most Powerful | 2AM (Thu 13th Aug) | 4.5ft (1.4m) 16s |
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 menu for Keaulanas over the next couple of weeks.
We’ve got a bit of a slow start, but don't write it off. The first few days are small but clean, with a long-period groundswell that's got some real push for its size. The water temp is sitting at a normal 81°, so it's pretty average for this time of year. The standout window looks to be around Wednesday, August 12th through Friday, August 14th, where the swell ticks up a notch.
The best bet of the whole run looks like Wednesday morning, August 12th. You’ve got a solid 3ft swell from the S, with a moderate combined wave energy (798), and clean conditions with a cross-off breeze. It's not huge, but it's the most consistent and workable we’ll see all week. For a bit more size, Thursday morning, August 13th pushes 4ft from the S, but it comes with a fresh 19 mph offshore wind. That's clean, but makes paddling a bit of a fight. It’s still the biggest swell of the period, so if you’ve got the strength, it’s worth a crack.
From Saturday, August 15th onwards, things get a bit messy. The wind picks up hard, hitting 28-31 mph by Sunday, with a risk of thunderstorms and near gale cross-shore winds. That’s a write-off for surfing – honestly, that setup looks more interesting for kite surfing than paddle surfing. There’s a few days of small, ordinary surf after that, but nothing to get excited about.
We do get a little reprieve right at the end of the outlook. Thursday morning, August 20th and Friday morning, August 21st offer glassy or light cross-off conditions with 2-2ft of clean, long-period SSW swell. It’s small, but if you’ve got a longboard and the itch, it’ll be a pleasant paddle.
So, to sum it up: aim for Wednesday the 12th or Thursday the 13th for the best waves. The rest is either too small, too windy, or too ordinary to bother with.
Stay wet,
Rusty
Short Range ForecastMostly dry. Warm (max 29°C on Sun afternoon, min 25°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 28°C on Tue afternoon, min 25°C on Tue night). Mainly fresh winds. | |||||||||||||||||||
Sat 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | ||||||||||||||
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 18 | SSW 17 | SW 16 | S 18 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | S 20 | S 18 | S 18 | S 16 | S 16 | S 15 | S 15 | S 14 | S 14 | S 14 |
Wave Graph  | ||||||||||||||||||||
 kJ | 154 | 202 | 130 | 156 | 288 | 186 | 234 | 240 | 222 | 269 | 373 | 515 | 613 | 1029 | 868 | 773 | 636 | 496 | 411 | 306 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | off | off | cross-off | off | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | off | cross-off | off | off | off | off | off |
High Tide | 00:29AM0.20m | 2:02PM0.77m | 1:39AM0.23m | 2:45PM0.79m | 2:33AM0.27m | 3:24PM0.79m | 3:22AM0.32m | 4:00PM0.76m | 4:10AM0.37m | 4:33PM0.71m | 4:57AM0.42m | 5:03PM0.63m | ||||||||
Low Tide | 9:20PM0.17m | 6:00AM0.03m | 9:41PM0.14m | 7:02AM0.01m | 10:06PM0.12m | 7:57AM0.01m | 10:31PM0.10m | 8:49AM0.02m | 10:56PM0.10m | 9:38AM0.06m | 11:20PM0.09m | 10:27AM0.12m | 11:44PM0.09m | |||||||
 |  | |  | | | | | | | | | | | | | | | | | |
 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — |
 | 7:07 | — | — | 7:07 | — | — | 7:06 | — | — | 7:05 | — | — | 7:05 | — | — | 7:04 | — | — | 7:02 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 28 | 26 | 27 | 29 | 26 | 28 | 29 | 26 | 28 | 28 | 25 | 27 | 28 | 25 | 28 | 28 | 26 | 27 | 28 | 26 |
Feels °C | 26 | 26 | 28 | 28 | 26 | 29 | 29 | 26 | 28 | 27 | 24 | 26 | 26 | 24 | 26 | 25 | 26 | 25 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | SSW 13 | NE 6 | SSW 13 | SSW 12 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 13 | S 18 | S 18 | S 16 | S 16 | S 15 | S 15 | S 14 | S 14 | S 14 |
| kJ | 120 | 45 | 96 | 85 | 288 | 186 | 234 | 240 | 222 | 269 | 299 | 515 | 613 | 1029 | 868 | 773 | 636 | 496 | 411 | 306 |
Swell 2 Height (m) Direction Period (s) | SW 18 | SSW 13 | SW 16 | S 18 | SSW 12 | SSW 12 | SSW 12 | NE 7 | NE 6 | SSE 9 | S 20 | SSW 13 | SSW 13 | WNW 12 | SE 7 | W 12 | W 11 | W 12 | SSW 18 | SE 15 |
| kJ | 154 | 137 | 130 | 156 | 56 | 81 | 53 | 36 | 34 | 31 | 373 | 294 | 273 | 28 | 12 | 11 | 10 | 11 | 30 | 35 |
Swell 3 Height (m) Direction Period (s) | SSE 10 | SSW 17 | SSW 18 | SW 16 | NNW 10 | NNW 9 | SSE 9 | SE 9 | SSW 11 | S 21 | SE 9 | SE 8 | WNW 12 | SE 8 | WNW 9 | NNW 8 | NNW 8 | NNW 7 | W 12 | NNW 9 |
| kJ | 31 | 202 | 102 | 127 | 33 | 27 | 35 | 22 | 40 | 79 | 19 | 18 | 28 | 10 | 17 | 6 | 6 | 5 | 11 | 16 |
Wind waves Height (m) Direction Period (s) | NE 6 | — | NE 7 | NE 5 | NE 6 | NE 6 | NE 6 | E 7 | E 7 | NE 6 | NE 6 | ENE 6 | NE 6 | NE 6 | NE 6 | NE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 8 |
| kJ | 37 | — | 49 | 28 | 40 | 51 | 36 | 152 | 152 | 43 | 39 | 27 | 46 | 54 | 53 | 88 | 96 | 127 | 202 | 232 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 2 | 9 | 1 | 0 | 5 | 2 | 2 | 0 | 2 | 2 | 2 | 0 | 2 | 5 | 0 | 11 | 11 | 6 | 11 | 162 |
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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