Surf Forecasts:
Duds Reef surf forecast from 31 Aug 2026:
- Best quality surf: Monday 7 Sep, 5AM (local time) - 7ft (2.1m), 13s period, E swell with cross-offshore winds.
- Most powerful swell: Sunday 6 Sep, 8AM (local time) - 8ft (2.5m), 13s period, ENE swell with 2,022 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 5AM (local time) - 7ft (2.1m), 13s period with E swell.
Best Forecast Surf Conditions for Duds Reef this week:
The surf forecast for Duds Reef over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Sep 07) at 5AM. The primary swell is predicted to be 2.1m and 13s period with a secondary swell of 0.8m and 17s. Another secondary swell of 1.9m and 13s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Duds Reef in the next 16 days are 2.5m 13s and forecast to arrive on Sunday (Sep 06) at 8AM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Mon 7th Sep) | 7ft (2.1m) 13s |
| Best Surf | 5AM (Mon 7th Sep) | 7ft (2.1m) 13s |
| Most Powerful | 8AM (Sun 6th Sep) | 8ft (2.5m) 13s |
Table - best surf conditions forecast for Duds Reef over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s chew the fat on what’s cookin’.
Honestly, the first ten days are a total bust for Duds Reef. We’re looking at a solid block of cross-shore wind – mostly a fresh breeze – and lumpy, chopped-out conditions. The swell is all sorts of junk: short-period windswill or weak long-period stuff. The wave comment screams “poor surf conditions” for days. The combined energy is mostly in the moderate zone (580-1289), but it’s all useless. Not a single window of clean waves.
That ENE wind just hammers in at 18-25 mph. It’s brutal. Even when the swell kicks up to 6-8 ft on Thursday the 3rd and Friday the 4th, the wind guts it. It’s not surfable.
Saturday the 5th sees a shift. The swell drops a bit, but the period jumps to 13 seconds – real groundswell. The energy rockets to 2221. The wind eases to 18 mph. Still cross-shore, but the wave comment upgrades to “marginal”. You might see a few rideable ones, but it’s still a bumpy mess. This carries through to Monday the 7th.
Now, for the only true highlight. Monday the 7th. The wind finally drops to a moderate 15 mph breeze from the NE and goes cross-offshore. The ocean cleans right up. In the afternoon, the swell pumps to 11 ft from the ENE at a solid 13-second period, with a monstrous combined energy of 6859. That’s some serious juice. But at 11 ft, this is big. This is expert territory only – powerful and heavy. The clean cross-offshore wind will make for some gorgeous, lined-up waves on this reef. If you’ve got the skills and the nerve, that’s your window. Tuesday the 8th dumps right back into windy, messy weather with some thunderstorms.
At the very end of the forecast, around the 14th and 15th, there’s a whisper of clean conditions. Monday afternoon the 14th goes glassy with a 4 ft swell from the ENE, and Tuesday afternoon the 15th goes glassy with a tiny 2 ft swell but a very long 18-second period. That’s two weeks out, so it’s a maybe, not a guarantee.
Bottom line: the water is around 80°F, which is about average for this time of year. Don’t bother until that Monday. The 7th is the only game in town, and it’s a big one. Only for the experts.
Rusty.
Short Range ForecastMostly dry. Warm (max 28°C on Tue afternoon, min 25°C on Mon night). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 28°C on Sat afternoon, min 25°C on Thu night). Winds decreasing (strong winds from the ENE on Thu morning, moderate winds from the ENE by Sat night). | ||||||||||||||||||||
Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | |||||||||||||||
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) | E 7 | ENE 7 | ENE 8 | SSW 18 | ENE 8 | S 17 | S 16 | S 16 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 13 | E 13 | E 13 | E 13 | E 13 | E 13 |
Wave Graph | |||||||||||||||||||||
231 | 259 | 251 | 329 | 318 | 465 | 520 | 401 | 463 | 558 | 501 | 703 | 765 | 520 | 342 | 1708 | 1228 | 1514 | 1339 | 1278 | 1468 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross |
High Tide | 5:20PM0.49m | 6:48AM0.60m | 5:42PM0.41m | 7:51AM0.61m | 5:57PM0.35m | 9:11AM0.63m | 10:39AM0.65m | 11:53AM0.69m | 11:42PM0.23m | 12:50PM0.73m | 00:58AM0.28m | ||||||||||
Low Tide | 11:55AM0.24m | 11:45PM0.07m | 1:04PM0.29m | 00:15AM0.07m | 2:51PM0.32m | 00:53AM0.08m | 1:48AM0.10m | 3:13AM0.11m | 8:07PM0.19m | 8:24PM0.16m | |||||||||||
6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | |
— | 6:49 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 27 | 26 | 27 | 28 | 26 | 27 | 28 | 26 | 27 | 27 | 25 | 26 | 27 | 26 | 27 | 28 | 26 | 27 | 28 | 26 |
Feels °C | 24 | 24 | 24 | 25 | 26 | 25 | 25 | 25 | 24 | 23 | 23 | 22 | 22 | 23 | 24 | 25 | 26 | 26 | 25 | 26 | 26 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | SSW 14 | S 19 | SSW 18 | S 18 | S 17 | S 16 | S 16 | S 15 | S 14 | S 14 | SSE 12 | SSE 11 | SSE 11 | S 11 | S 10 | E 13 | SSW 10 | E 13 | SW 10 | E 13 |
191 | 180 | 192 | 329 | 314 | 465 | 520 | 401 | 347 | 268 | 192 | 255 | 307 | 370 | 326 | 392 | 1228 | 263 | 1339 | 196 | 1468 | |
Swell 2 Height (m) Direction Period (s) | S 11 | S 11 | S 10 | SW 14 | S 12 | SSE 10 | SSE 10 | S 11 | E 13 | E 13 | E 12 | S 13 | E 13 | E 13 | E 13 | SSW 18 | SSW 12 | SSW 16 | SSW 11 | SSW 16 | SSW 18 |
82 | 79 | 50 | 100 | 75 | 35 | 33 | 64 | 85 | 121 | 74 | 176 | 127 | 222 | 342 | 121 | 418 | 147 | 275 | 295 | 459 | |
Swell 3 Height (m) Direction Period (s) | S 21 | SSW 19 | SW 14 | SSE 10 | SW 14 | SW 14 | SW 14 | E 14 | S 11 | S 10 | SE 12 | E 12 | S 13 | SSW 13 | S 13 | NNE 10 | SSE 10 | SSE 10 | SSW 16 | SSE 10 | SW 9 |
76 | 123 | 74 | 30 | 51 | 50 | 48 | 66 | 58 | 18 | 51 | 109 | 90 | 17 | 168 | 21 | 85 | 57 | 229 | 57 | 95 | |
Wind waves Height (m) Direction Period (s) | E 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 13 | ENE 8 | E 13 | ENE 13 | E 13 | ENE 13 |
231 | 259 | 251 | 264 | 318 | 264 | 273 | 253 | 463 | 558 | 501 | 703 | 765 | 520 | 341 | 1708 | 398 | 1514 | 980 | 1278 | 1044 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 22 | 22 | 12 | 12 | 144 | 12 | 12 | 27 | 22 | 145 | 146 | 146 | 144 | 31 | 22 | 13 | 13 | 12 | 15 | 21 | 12 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Duds Reef Surf forecast
The above surf forecast table for Duds Reef provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Duds Reef can be found by selecting the local surf guide option on the grey menu. Our Duds Reef 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 (Duds Reef) 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 Duds Reef 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.
Duds Reef is 0 km (0 miles) from 'Ewa Beach. If you plan a vacation in Oahu, look for hotels and other accommodation in 'Ewa Beach. 'Ewa Beach has rooms for a wide range of budgets as well as car hire and transport links.











