Surf Forecasts:
Keaulanas surf forecast from 1 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 2AM (local time) - 4ft (1.2m), 15s period, SSW swell with cross-offshore winds.
- Most powerful swell: Monday 7 Sep, 2PM (local time) - 4ft (1.2m), 17s period, SSW swell with 767 kJ wave energy.
- Next surfable swell (1★+): Tuesday 1 Sep, 5AM (local time) - 2ft (0.6m), 19s 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 Tuesday (Sep 01) at 5AM. The primary swell is predicted to be 0.6m and 19s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Keaulanas in the next 16 days are 1.2m 17s and forecast to arrive on Monday (Sep 07) at 2PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 13s period and expected on Saturday (Sep 05) at 8AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Tue 1st Sep) | 2ft (0.6m) 19s |
| Best Surf | 2AM (Tue 8th Sep) | 4ft (1.2m) 15s |
| Most Powerful | 2PM (Mon 7th Sep) | 4ft (1.2m) 17s |
Table - best surf conditions forecast for Keaulanas over the next 16 days.
The Lowdown
Alright, Rusty here again, but this time in feet and knots. Let’s break down the 16 days ahead for Keaulanas.
The overall picture: the first few days are a bit of a dud, with weak, messy swell and onshore-ish winds. But the good stuff arrives on the weekend, and then it’s a slow fade into the second week.
The standout window is Sunday, September 6th. That morning, we’ve got a 5ft SSW groundswell, running on a very long 12-second period, with a light offshore breeze from the ENE. The combined energy is strong at 874, and the water temp is about average for the time of year. It’s glassy, clean, and the waves will have serious shape. The afternoon keeps it going, with a 5ft SSW swell, same long period, and gentle offshore winds. That’s a solid day for a beach-and-reef setup.
Monday the 7th is also a top pick. The morning brings a 3ft SSW swell with a very long 17-second period – that’s real groundswell energy. Combined energy is 794, and the wind is light and cross-off, so it’s clean. The afternoon gets a touch bigger, 4ft, with the same long period, and energy jumps to 992. That’s a powerful pulse. The long period will make the waves stand up nicely, but it might be a bit straight for the beach break – stick to the reef.
After that, the swell drops off. By the 13th and 14th of September, we’re looking at small, clean waves around 2ft, with light winds. It’s surfable, but not a thrill. Crowds are only “sometimes” an issue, so you’ll have the place mostly to yourself.
The best call is Sunday the 6th and Monday the 7th. Don’t sleep on it. The rest of the month is a slow, clean fade. Water temp is normal for this time of year, so no wetsuit worries.
Rusty.
Short Range ForecastMostly dry. Warm (max 28°C on Tue morning, min 25°C on Tue night). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 28°C on Sat morning, min 25°C on Fri morning). Winds decreasing (fresh winds from the ENE on Fri morning, light winds from the ENE by Sun night). | ||||||||||||||||||||
Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | |||||||||||||||
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) | SSW 18 | S 18 | S 17 | S 16 | S 16 | S 15 | S 14 | S 14 | S 14 | SW 12 | S 11 | S 12 | S 12 | S 12 | SSW 11 | SSW 11 | SW 11 | SW 11 | SSW 16 | SSW 17 | SSW 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 333 | 314 | 373 | 427 | 406 | 279 | 206 | 198 | 93 | 6 | 510 | 614 | 686 | 617 | 455 | 372 | 503 | 439 | 619 | 642 | 596 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | cross-off | cross-off | cross-off | cross-off | off | off | cross-off | off | cross-off | cross-off | cross-off | off | cross-off | off | cross-off | cross-off | cross-on | cross-off |
High Tide | 5:35PM0.37m | 8:00AM0.58m | 5:33PM0.31m | 9:21AM0.60m | 10:46AM0.63m | 11:57AM0.67m | 11:47PM0.20m | 12:52PM0.70m | 1:00AM0.25m | 1:38PM0.72m | 1:50AM0.31m | ||||||||||
Low Tide | 1:15PM0.28m | 00:13AM0.07m | 3:27PM0.30m | 00:49AM0.08m | 1:42AM0.09m | 3:07AM0.10m | 8:21PM0.17m | 8:34PM0.14m | 6:04AM0.09m | 8:53PM0.12m | |||||||||||
 |  |  | | |  | | | | | | | | | | | | | | | | |
 | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — |
 | — | 6:47 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 28 | 28 | 26 | 27 | 28 | 26 | 27 | 27 | 26 | 27 | 27 | 25 | 28 | 28 | 26 | 27 | 28 | 26 | 27 | 27 | 27 |
Feels °C | 27 | 27 | 26 | 26 | 27 | 25 | 25 | 23 | 24 | 24 | 24 | 23 | 28 | 27 | 26 | 28 | 29 | 27 | 30 | 29 | 30 |
Swell 1 Height (m) Direction Period (s) | SSW 18 | S 18 | S 17 | S 16 | S 16 | S 15 | S 14 | SSE 12 | SSE 12 | SSE 12 | S 11 | S 12 | S 12 | S 12 | SSW 11 | SSW 11 | SW 11 | SW 11 | SSW 16 | SW 11 | SW 12 |
| kJ | 333 | 314 | 373 | 427 | 406 | 279 | 206 | 187 | 387 | 503 | 510 | 614 | 686 | 617 | 455 | 372 | 503 | 439 | 619 | 304 | 414 |
Swell 2 Height (m) Direction Period (s) | SSW 14 | S 12 | SW 14 | SSE 10 | S 12 | S 11 | SE 13 | S 14 | S 14 | E 14 | E 14 | E 14 | E 13 | SSW 18 | SSW 16 | SSW 16 | SSW 19 | NE 12 | SW 11 | SSW 17 | SSW 15 |
| kJ | 113 | 77 | 50 | 33 | 66 | 37 | 138 | 198 | 93 | 33 | 35 | 32 | 55 | 120 | 162 | 318 | 205 | 232 | 263 | 642 | 596 |
Swell 3 Height (m) Direction Period (s) | S 10 | SW 14 | S 10 | SW 14 | SW 13 | SE 15 | S 10 | SSW 13 | E 14 | SW 12 | SW 13 | SSW 20 | SSW 18 | E 13 | E 13 | E 13 | S 12 | SSW 18 | NNE 6 | S 10 | ENE 12 |
| kJ | 28 | 53 | 33 | 30 | 27 | 36 | 18 | 17 | 16 | 6 | 26 | 37 | 63 | 53 | 88 | 87 | 70 | 263 | 37 | 71 | 213 |
Wind waves Height (m) Direction Period (s) | NE 7 | NE 7 | NE 7 | NE 7 | NE 8 | ENE 7 | ENE 7 | ENE 7 | NE 7 | NE 7 | NE 7 | NE 7 | NE 6 | NE 6 | NE 6 | NE 6 | NE 7 | — | — | — | — |
| kJ | 140 | 165 | 156 | 217 | 164 | 169 | 204 | 191 | 153 | 151 | 139 | 84 | 59 | 103 | 66 | 62 | 97 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 2 | 0 | 160 | 0 | 6 | 11 | 160 | 11 | 160 | 6 | 161 | 16 | 16 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Keaulanas surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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.
Nearest