
Surf Forecasts:
Keaulanas surf forecast from 14 Sep 2026:
- Best quality surf: Tuesday 15 Sep, 5AM (local time) - 2.5ft (0.7m), 21s period, SW swell with cross-offshore winds.
- Most powerful swell: Friday 18 Sep, 5AM (local time) - 3.5ft (1.1m), 18s period, SSW swell with 759 kJ wave energy.
- Next surfable swell (1★+): Sunday 13 Sep, 8PM (local time) - 1.5ft (0.4m), 14s 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 Sunday (Sep 13) at 8PM. The primary swell is predicted to be 0.4m and 14s 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 18s and forecast to arrive on Friday (Sep 18) at 5AM. 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 7s period and expected on Thursday (Sep 17) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Sun 13th Sep) | 1.5ft (0.4m) 14s |
| Best Surf | 5AM (Tue 15th Sep) | 2.5ft (0.7m) 21s |
| Most Powerful | 5AM (Fri 18th Sep) | 3.5ft (1.1m) 18s |
Table - best surf conditions forecast for Keaulanas over the next 16 days.
The Lowdown
G’day, Rusty here. We’ve got a solid 16-day window on the cards. The surf kicks in pretty much straight away and keeps rolling, so there’s no frustrating gap at the start. The energy builds nicely through the first week, then we see some stronger, longer-period stuff showing up in the second week. Let’s break it down.
The best of the bunch looks like Tuesday the 15th and Wednesday the 16th. On Tuesday morning, it’s clean with a slight offshore air, swell at 3 ft from the SSW and a long 20-second period. The combined energy hits a solid 531 (moderate), and you’re looking at very good conditions. Wednesday morning keeps that momentum – 3 ft from the SSW, 18-second period, with a proper offshore wind from the NE at 12 mph smoothing things right out. Energy is even stronger at 575. That’s the standout window for clean, lined-up waves.
Also worth a mention: the water temp is sitting at 81°, which is pretty much average for this time of year, so no surprises there.
Now, into the second week, there’s something interesting brewing. Friday the 25th morning sees a shift – a 2 ft swell from the WNW with a 22-second period and offshore winds. That’s proper groundswell energy at 623 – feels like a sneaky pulse. Then Saturday the 26th morning pushes even bigger: 3 ft from the WNW, 18-second period, and combined energy jumping to 1007 – that’s strong, with some serious push. Offshore winds again. That’s an expert-level window if it lines up. Just remember it’s a long-range call, so not locked in yet, but the potential’s there.
Through the rest of the period, there’s a lot of 3 ft to 3 ft SSW swell hanging around, but the wind tends to be cross-off or breezier, so it’ll be a bit more textured. Tuesday the 22nd and Monday the 28th afternoon both show clean conditions with 2 ft to 3 ft and solid energy – worth a paddle if you’re keen for something mellower.
Crowds at Keaulanas are *sometimes* an issue, so on the standout days, you might have company, but nothing like a full-on zoo. This spot’s exposed and consistent, so it’s got plenty to offer.
All in, jump on Tuesday morning and Wednesday morning in the first week for the cleanest, most user-friendly surf. Keep an eye on that Friday/Saturday window in week two for something more powerful.
Rusty
Short Range ForecastMostly dry. Warm (max 28°C on Mon afternoon, min 24°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 29°C on Wed afternoon, min 26°C on Wed night). Wind will be generally light. | |||||||||||||||||||
Sun 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | ||||||||||||||
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 15 | SSW 14 | SSW 14 | SW 22 | SW 21 | SSW 20 | SW 19 | SW 19 | SSW 18 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 15 | SSW 16 | S 16 |
Wave Graph | ||||||||||||||||||||
84 | 134 | 76 | 227 | 224 | 490 | 384 | 535 | 541 | 541 | 510 | 322 | 322 | 651 | 622 | 573 | 539 | 414 | 512 | 260 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | off | off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off |
High Tide | 4:45PM0.44m | 5:56AM0.59m | 5:04PM0.37m | 6:41AM0.58m | 5:14PM0.32m | 7:35AM0.57m | 8:46AM0.55m | 10:11AM0.54m | 11:24AM0.56m | 11:58PM0.21m | ||||||||||
Low Tide | 10:56PM0.08m | 12:24PM0.24m | 11:16PM0.09m | 1:38PM0.27m | 11:37PM0.10m | 00:02AM0.12m | 00:34AM0.14m | 1:44AM0.17m | 8:14PM0.18m | |||||||||||
— | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | |
6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 26 | 27 | 28 | 26 | 27 | 28 | 27 | 28 | 29 | 26 | 27 | 28 | 27 | 28 | 29 | 27 | 27 | 28 | 26 |
Feels °C | 29 | 27 | 28 | 29 | 28 | 30 | 31 | 29 | 29 | 29 | 27 | 27 | 28 | 28 | 27 | 27 | 27 | 26 | 27 | 26 |
Swell 1 Height (m) Direction Period (s) | NE 9 | NE 9 | NE 8 | SW 22 | NE 8 | SSW 20 | SW 19 | SW 19 | SSW 18 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 15 | SSW 16 | SSW 14 |
75 | 75 | 70 | 227 | 67 | 490 | 384 | 535 | 541 | 541 | 510 | 322 | 322 | 651 | 622 | 573 | 539 | 414 | 512 | 173 | |
Swell 2 Height (m) Direction Period (s) | SSW 15 | SSW 14 | SSW 14 | SW 14 | SW 21 | NE 8 | NE 8 | NE 8 | SW 12 | SW 11 | NE 8 | SSW 20 | SSW 19 | SSE 10 | NNE 7 | ENE 8 | NE 6 | S 18 | S 18 | S 16 |
84 | 134 | 76 | 48 | 224 | 64 | 60 | 57 | 34 | 31 | 31 | 216 | 210 | 9 | 56 | 21 | 40 | 163 | 162 | 260 | |
Swell 3 Height (m) Direction Period (s) | SW 12 | SW 24 | SSW 24 | SSW 11 | SSW 13 | SW 13 | SW 12 | SW 12 | NNE 9 | SSE 8 | SW 11 | SW 11 | E 10 | NW 12 | E 8 | SSE 8 | E 7 | SSE 6 | SSE 6 | SW 15 |
37 | 87 | 54 | 23 | 68 | 41 | 38 | 37 | 8 | 7 | 31 | 18 | 17 | 5 | 42 | 26 | 28 | 16 | 15 | 110 | |
Wind waves Height (m) Direction Period (s) | — | E 9 | E 4 | NE 8 | — | — | E 5 | ENE 5 | NE 7 | NE 8 | NE 6 | NE 7 | NE 7 | NE 7 | — | NE 7 | — | NE 7 | NE 7 | ENE 7 |
— | 38 | 10 | 69 | — | — | 21 | 28 | 43 | 84 | 36 | 132 | 147 | 115 | — | 44 | — | 67 | 65 | 70 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 160 | 0 | 0 | 0 | 2 | 5 | 5 | 2 | 2 | 2 | 0 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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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.










