Surf Forecasts:
Keaulanas surf forecast from 25 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 702 kJ wave energy.
- Next surfable swell (1★+): Tuesday 25 Aug, 2AM (local time) - 2.5ft (0.7m), 13s 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 Tuesday (Aug 25) at 2AM. The primary swell is predicted to be 0.7m and 13s 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 1.1m 17s and forecast to arrive on Thursday (Aug 27) at 11AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 8s period and expected on Monday (Aug 31) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Tue 25th Aug) | 2.5ft (0.7m) 13s |
| 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, I’m gonna be straight with ya, it’s been a bit flat and quiet out here. The next few days are looking pretty average, but there’s a window of cleaner conditions shaping up mid-week that’ll get the blood pumping. Let’s break it down.
We’re looking at Keaulanas, a beach and reef setup that picks up swell from the west. Right now, Monday afternoon the 24th, there’s a little 2 ft, 13-second swell from the SSW, but with a 12 mph cross-off wind, it’s just not happening — poor conditions, and the energy is weak (156). The water’s sitting at a warm 82°, which is about normal for this time of year.
Tuesday the 25th and into Wednesday morning the 26th, it’s more of the same: small, messy cross-off winds and barely any rideable bumps. You’re better off staying on the beach.
Now, here’s where it gets interesting. Wednesday afternoon the 26th, the wind swings offshore from the ENE, and we’ve got a clean 3 ft S swell pushing in with a long 18-second period. The combined energy jumps to 530 — that’s moderate energy, and the conditions are looking very good. This is the first real standout, right here. That long period groundswell will wrap nicely into Keaulanas, so expect some nice, lined-up waves, but it’s not going to be a circus. Crowds are possible though, so pick your peak.
Thursday morning the 27th builds on that. We’ve got 4 ft of S swell, still 17 seconds, with a clean offshore wind. Energy hits 815, still moderate but pushing into strong territory. The waves will have some punch, but it’s still manageable for an intermediate. This is the other standout — keep an eye on it.
Friday the 28th sees the swell ease a little, but the afternoon session with offshore wind and 3 ft S swell at 14 seconds should offer some fun ones. Energy’s around 446, still decent. After that, we drop back into smaller, less consistent surf through the weekend and into the start of September.
The first week of September, Monday the 31st through Wednesday the 3rd, has some clean but small swell, mostly in the 2 ft to 3 ft range, with periods around 14-16 seconds. The offshore winds keep things tidy, but it’s not going to blow your mind. By Thursday the 3rd, the wind freshens, and conditions get tougher — strong offshore makes paddling a chore.
From the 4th of September onward, it gets windy and messy. Strong breezes, some rain, and even a risk of thunderstorms. The swell sticks around in the 2 ft to 3 ft range, but with 25+ mph winds, it’ll be choppy and hard. The last few days, the 7th and 8th, the wind drops out, leaving light cross-shore breezes and clean but small waves — a nice way to finish the run, but nothing to get excited about.
So, to sum it up: the best windows are Wednesday afternoon the 26th and Thursday morning the 27th. That’s your best chance for clean, lined-up surf with some real push. After that, it’s a waiting game with smaller, cleaner days sprinkled in.
This is Rusty, signing off. See you in the water.
Short Range ForecastMostly dry. Warm (max 29°C on Mon afternoon, min 25°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 28°C on Thu afternoon, min 25°C on Thu night). Wind will be generally light. | |||||||||||||||||||
Mon 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | ||||||||||||||
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 13 | SSW 13 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | S 18 | S 19 | S 17 | S 16 | S 16 | S 14 | S 14 | S 14 | S 13 | S 13 | SSW 17 | SSW 16 | SSW 16 | SSW 15 |
Wave Graph | ||||||||||||||||||||
156 | 140 | 147 | 196 | 167 | 215 | 395 | 365 | 702 | 534 | 582 | 334 | 399 | 229 | 219 | 215 | 188 | 171 | 162 | 199 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | cross-off | cross-off | off | cross-off | off | off | off | off | cross-off | cross-off | off | off | cross-off | off | cross-off | cross-off | off | cross-off |
High Tide | 2:17PM0.67m | 2:05AM0.28m | 2:47PM0.68m | 2:41AM0.32m | 3:14PM0.68m | 3:17AM0.36m | 3:40PM0.66m | 3:54AM0.41m | 4:06PM0.63m | 4:33AM0.46m | 4:30PM0.57m | 5:15AM0.50m | 4:54PM0.51m | |||||||
Low Tide | 9:34PM0.15m | 7:24AM0.08m | 9:50PM0.14m | 8:06AM0.07m | 10:06PM0.13m | 8:47AM0.08m | 10:23PM0.11m | 9:29AM0.11m | 10:41PM0.10m | 10:14AM0.14m | 11:00PM0.09m | 11:03AM0.19m | 11:21PM0.08m | |||||||
— | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — | 6:15 | — | — | |
6:54 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 29 | 27 | 28 | 28 | 26 | 27 | 27 | 25 | 27 | 28 | 26 | 26 | 28 | 25 | 26 | 27 | 26 | 27 | 28 | 26 |
Feels °C | 29 | 28 | 26 | 26 | 26 | 25 | 25 | 24 | 26 | 27 | 26 | 25 | 26 | 24 | 24 | 25 | 25 | 26 | 26 | 26 |
Swell 1 Height (m) Direction Period (s) | NE 6 | SSW 13 | SSW 12 | SSW 16 | SSW 15 | SSW 14 | S 18 | S 19 | S 17 | S 16 | S 16 | S 14 | S 14 | S 14 | S 13 | S 13 | S 12 | S 12 | S 12 | SSW 15 |
53 | 140 | 119 | 196 | 167 | 215 | 395 | 365 | 702 | 534 | 582 | 334 | 399 | 229 | 219 | 215 | 102 | 136 | 98 | 199 | |
Swell 2 Height (m) Direction Period (s) | SSW 13 | SSE 8 | SSW 16 | SSW 12 | SSW 12 | S 18 | SSW 13 | SSW 13 | S 12 | S 12 | NE 5 | SSW 11 | NW 9 | SW 19 | SW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | S 11 |
156 | 22 | 147 | 81 | 81 | 165 | 135 | 137 | 100 | 72 | 21 | 38 | 12 | 91 | 80 | 115 | 188 | 171 | 162 | 85 | |
Swell 3 Height (m) Direction Period (s) | SSE 12 | SSW 17 | SSE 6 | SSE 6 | SSE 9 | SSE 12 | SSE 12 | S 17 | NW 9 | N 8 | NNE 7 | NW 9 | SSW 19 | SSW 10 | WNW 9 | E 13 | SSE 5 | W 10 | W 11 | S 20 |
47 | 94 | 17 | 17 | 46 | 55 | 55 | 147 | 13 | 11 | 10 | 12 | 35 | 19 | 8 | 14 | 2 | 8 | 9 | 30 | |
Wind waves Height (m) Direction Period (s) | — | NE 6 | ENE 6 | NE 6 | NE 5 | ENE 5 | NE 5 | NE 5 | NE 6 | NE 4 | E 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 7 | NE 7 | NE 7 |
— | 32 | 41 | 39 | 22 | 36 | 32 | 24 | 29 | 26 | 81 | 43 | 80 | 64 | 85 | 88 | 70 | 77 | 114 | 112 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 5 | 0 | 5 | 5 | 0 | 5 | 0 | 0 | 0 | 160 | 2 | 2 | 0 | 0 | 5 | 5 | 2 | 2 | 6 | 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.











