
Surf Forecasts:
Kewalos surf forecast from 6 Sep 2026:
- Best quality surf: Monday 7 Sep, 2AM (local time) - 7ft (2.2m), 12s period, ENE swell with cross-offshore winds.
- Most powerful swell: Tuesday 8 Sep, 2AM (local time) - 11ft (3.5m), 13s period, SW swell with 3,971 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 2AM (local time) - 7ft (2.2m), 12s period with ENE swell.
Best Forecast Surf Conditions for Kewalos this week:
The surf forecast for Kewalos over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Sep 07) at 2AM. The primary swell is predicted to be 2.2m and 12s period with a secondary swell of 1.7m and 14s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Kewalos in the next 16 days are 3.5m 13s and forecast to arrive on Tuesday (Sep 08) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 10s period and expected on Tuesday (Sep 08) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Mon 7th Sep) | 7ft (2.2m) 12s |
| Best Surf | 2AM (Mon 7th Sep) | 7ft (2.2m) 12s |
| Most Powerful | 2AM (Tue 8th Sep) | 11ft (3.5m) 13s |
Table - best surf conditions forecast for Kewalos over the next 16 days.
The Lowdown
Alright, let’s switch to feet for the same picture. This is Rusty again.
The next couple of weeks are a mixed bag. We get a solid pulse of swell right at the start, but the wind and conditions are going to make you work for it. There’s a long, dead stretch in the middle, and only a tiny hint of something better right at the end.
We start on Sunday, September 6th at Kewalos – a reef break for the advanced surfers only. The water temp is 81°, pretty normal for this time of year. Sunday morning brings a solid 7ft swell from the ENE with a 12-second period. That’s a proper groundswell with a lot of power, showing a combined energy of 1951. The wind is blowing at 19 mph from the ENE, a cross-off breeze that will keep the face clean. It’s going to be big and powerful, so only the experts should be out there.
In the afternoon, the swell drops to 6ft, but the wind turns more cross-shore, making for a choppier surface. The energy is even higher at 2467, but it’s less clean. Monday morning has 5ft swell with 15 mph cross winds, still a lot of energy (2003), but messy. The pick of this early period is definitely Sunday morning due to the clean, cross-off wind and the size.
Tuesday brings onshore winds and a rapid drop in quality. From Tuesday through to the 19th, we hit a long, flat spell. The swell falls well under 3ft, and the energy readings are mostly in the low hundreds (like 125, 166), meaning barely any wave at all. There are some days with clean, offshore winds, but the waves are just too small.
The only other light comes on Monday, September 21st. In the late afternoon, we get near glassy conditions with a light 3 mph SSE breeze. The swell is tiny at 3ft from the SSW, with a 14-second period, and the energy is 448 – still weak. However, the data says “expect good surf conditions.” The glassy wind and long period could make the reef at Kewalos produce some fun, shapey waves. It’s a long-range call, so don’t book your trip yet, but it’s the only hope in the whole outlook.
Your standout is Sunday morning, September 6th, for the big-wave crew. For everyone else, that glassy session on the 21st is your best, and maybe only, chance at a clean wave.
Rusty.
Short Range ForecastHeavy rain (total 32mm), heaviest during Sun afternoon. Warm (max 27°C on Sun morning, min 24°C on Sun night). Winds decreasing (fresh winds from the SSE on Mon night, light winds from the SE by Tue night). | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Wed afternoon. Warm (max 28°C on Wed afternoon, min 25°C on Thu morning). Mainly fresh winds. | ||||||||||||||||||||
Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | |||||||||||||||
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) | ENE 12 | ENE 12 | ENE 12 | E 12 | SSW 13 | SW 13 | ENE 11 | ENE 11 | ENE 10 | SSW 14 | SSW 13 | ENE 8 | ENE 7 | ENE 7 | SW 16 | SW 16 | ENE 12 | ENE 11 | ENE 10 | ENE 10 | SW 16 |
Wave Graph | |||||||||||||||||||||
1240 | 1064 | 1338 | 784 | 1083 | 3971 | 854 | 627 | 356 | 269 | 257 | 176 | 225 | 186 | 211 | 206 | 343 | 597 | 380 | 339 | 68 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-off | cross | cross | cross-on | on | on | cross-on | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 1:00PM0.73m | 1:21AM0.26m | 1:47PM0.73m | 2:09AM0.32m | 2:28PM0.72m | 2:51AM0.39m | 3:05PM0.69m | 3:32AM0.45m | 3:39PM0.64m | 4:11AM0.50m | 4:12PM0.57m | 4:51AM0.54m | 4:42PM0.50m | ||||||||
Low Tide | 8:31PM0.10m | 6:25AM0.07m | 8:57PM0.08m | 7:26AM0.06m | 9:22PM0.06m | 8:21AM0.06m | 9:46PM0.05m | 9:12AM0.07m | 10:10PM0.04m | 10:02AM0.10m | 10:33PM0.04m | 10:52AM0.13m | 10:56PM0.05m | ||||||||
6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | |
— | 6:43 | — | — | 6:42 | — | — | 6:40 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | |
mm | — | 4 | 8 | 5 | 3 | 7 | 4 | — | 1 | — | 2 | 1 | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 27 | 25 | 26 | 27 | 27 | 27 | 27 | 27 | 27 | 28 | 26 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 |
Feels °C | 25 | 27 | 26 | 26 | 27 | 26 | 27 | 28 | 31 | 30 | 31 | 28 | 25 | 25 | 24 | 24 | 24 | 23 | 25 | 24 | 24 |
Swell 1 Height (m) Direction Period (s) | SSW 12 | ENE 12 | ENE 12 | E 12 | SSW 13 | SW 13 | ENE 11 | ENE 11 | ENE 10 | ENE 8 | ENE 8 | E 13 | SSW 13 | E 12 | E 12 | ENE 12 | ENE 12 | SW 15 | ENE 10 | SSW 16 | SSW 13 |
374 | 1064 | 1338 | 784 | 1083 | 3971 | 854 | 627 | 284 | 177 | 149 | 156 | 129 | 101 | 130 | 142 | 343 | 226 | 380 | 99 | 68 | |
Swell 2 Height (m) Direction Period (s) | SSW 16 | SSW 12 | SSW 14 | SW 12 | ENE 12 | ENE 12 | WSW 10 | SSW 8 | SSW 8 | SSW 14 | SSW 13 | SSW 13 | E 12 | SSW 13 | SW 16 | SW 16 | SW 15 | SW 8 | SW 15 | SW 13 | SW 16 |
318 | 517 | 1048 | 480 | 876 | 1211 | 596 | 361 | 128 | 269 | 257 | 176 | 141 | 125 | 211 | 206 | 229 | 18 | 242 | 88 | 64 | |
Swell 3 Height (m) Direction Period (s) | SSE 10 | S 19 | S 18 | SSW 17 | SSW 17 | SSW 15 | SSW 15 | W 9 | SSW 14 | SSW 7 | E 13 | S 7 | SW 16 | SW 18 | SW 10 | SW 9 | NNE 7 | SSW 11 | SW 8 | SW 8 | WSW 8 |
19 | 180 | 240 | 492 | 486 | 487 | 468 | 230 | 356 | 62 | 166 | 25 | 133 | 155 | 49 | 43 | 30 | 25 | 11 | 10 | 6 | |
Wind waves Height (m) Direction Period (s) | ENE 12 | ENE 12 | — | ENE 7 | ENE 7 | SSE 8 | SSW 10 | — | — | — | — | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | — | ENE 11 | ENE 10 | ENE 10 | NE 10 |
1240 | 706 | — | 247 | 198 | 373 | 698 | — | — | — | — | 151 | 225 | 186 | 168 | 140 | — | 597 | 267 | 339 | 376 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 29 | 28 | 0 | 131 | 61 | 82 | 82 | 21 | 18 | 1 | 1 | 1 | 28 | 1 | 1 | 28 | 28 | 1 | 28 | 28 | 1 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Kewalos Surf forecast
The above surf forecast table for Kewalos provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Kewalos can be found by selecting the local surf guide option on the grey menu. Our Kewalos 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 (Kewalos) 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 Kewalos 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.
Kewalos is 5 km (3 miles) from Honolulu. If you plan a vacation in Oahu, look for hotels and other accommodation in Honolulu. Honolulu has rooms for a wide range of budgets as well as car hire and transport links.










