Surf Forecasts:
Duds Reef surf forecast from 1 Sep 2026:
- Best quality surf: Sunday 6 Sep, 5AM (local time) - 7.5ft (2.3m), 13s period, ENE swell with cross-offshore winds.
- Most powerful swell: Sunday 6 Sep, 5AM (local time) - 7.5ft (2.3m), 13s period, ENE swell with 1,739 kJ wave energy.
- Next surfable swell (1★+): Sunday 6 Sep, 5AM (local time) - 7.5ft (2.3m), 13s period with ENE 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 Sunday (Sep 06) at 5AM. The primary swell is predicted to be 2.3m and 13s period with a secondary swell of 1.9m and 13s. Another secondary swell of 1.5m and 11s 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 2.3m 13s and forecast to arrive on Sunday (Sep 06) 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 0.2m 11s period and expected on Saturday (Sep 05) at 8AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Sun 6th Sep) | 7.5ft (2.3m) 13s |
| Best Surf | 5AM (Sun 6th Sep) | 7.5ft (2.3m) 13s |
| Most Powerful | 5AM (Sun 6th Sep) | 7.5ft (2.3m) 13s |
Table - best surf conditions forecast for Duds Reef over the next 16 days.
The Lowdown
Alright, let’s run through it again in feet and Fahrenheit.
Water temp at Duds Reef is about 81°F, pretty much normal for this time of year.
The first week and a half is a rough patch. From Tuesday the 1st through the morning of Saturday the 12th, it’s mostly cross-shore winds, choppy water, and poor surf. The wind is blowing from the ENE at 15 to 25 mph, messing up the waves. The swell energy is moderate to strong (numbers like 739 to 3081), but it’s short-period junk. Not worth your time.
Then, Saturday the 12th afternoon – that’s the golden window. The wind goes glassy calm, and the swell is 4ft from the south with a 13-second period. That’s a nice groundswell. Combined energy is 776 (moderate). The break is exposed to SSE, so this is a good match. Crowds are “sometimes,” so you might have company, but not a big crowd. This is the best of the whole 16 days. Clean, glassy, and fun.
Sunday the 13th, the swell jumps to 10-12ft from the SSW and S, with 12-second periods. Energy is strong (3188 to 4170). That’s well over 8ft, so experts only. Wind is light, cross-on or cross-shore, so not perfect, but for the big-wave crew, it’s on.
Monday the 14th is still big, 15ft in the morning dropping to 12ft, but the period drops to 8 seconds – short-period, wind-affected. Cross-shore wind comes back at 15 mph. Energy is still strong (2601 and 1650), but the quality is poor. Maybe for the kite surfers.
After that, it fades. Tuesday the 15th and Wednesday the 16th are small and weak. Nothing to chase.
So, the standout is the afternoon of Saturday the 12th. Glassy, clean, 4ft south swell. That’s your session. The big stuff on the 13th and 14th is for the experts only.
Rusty.
Short Range ForecastMostly dry. Warm (max 28°C on Tue morning, min 25°C on Tue night). Mainly strong winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 28°C on Sat afternoon, min 25°C on Fri morning). Winds decreasing (strong winds from the ENE on Fri morning, light winds from the NE 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 | ENE 8 | S 17 | S 16 | S 16 | E 8 | E 8 | E 8 | E 8 | S 12 | S 11 | S 12 | E 13 | E 13 | E 13 | E 13 | ENE 12 | E 12 | E 13 | E 12 | ENE 12 |
Wave Graph  | |||||||||||||||||||||
 kJ | 329 | 330 | 465 | 520 | 401 | 482 | 645 | 482 | 510 | 628 | 573 | 690 | 1121 | 1087 | 1283 | 1210 | 1338 | 722 | 1104 | 1020 | 960 |
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-off | cross | cross | cross-off | cross-on | cross-on | cross-on |
High Tide | 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 | 1:37PM0.75m | 1:49AM0.35m | ||||||||||
Low Tide | 1:04PM0.29m | 00:15AM0.07m | 2:51PM0.32m | 00:53AM0.08m | 1:48AM0.10m | 3:13AM0.11m | 8:07PM0.19m | 8:24PM0.16m | 6:09AM0.09m | 8:46PM0.13m | |||||||||||
 | |  | | | | | | | | | | | | |  | | | | | | |
 | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — |
 | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — | — | 6:42 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 28 | 28 | 26 | 27 | 27 | 25 | 27 | 27 | 25 | 26 | 27 | 25 | 27 | 28 | 26 | 27 | 28 | 26 | 28 | 28 | 27 |
Feels °C | 26 | 26 | 25 | 25 | 24 | 22 | 23 | 23 | 22 | 21 | 23 | 22 | 25 | 26 | 25 | 27 | 27 | 27 | 29 | 28 | 29 |
Swell 1 Height (m) Direction Period (s) | SSW 18 | S 18 | S 17 | S 16 | S 16 | S 15 | SE 13 | SSE 12 | SSE 12 | S 12 | S 11 | S 12 | S 12 | SSW 12 | SSW 11 | SSW 11 | E 12 | E 12 | E 13 | E 12 | ENE 12 |
| kJ | 329 | 314 | 465 | 520 | 401 | 352 | 170 | 359 | 444 | 628 | 573 | 690 | 699 | 636 | 435 | 372 | 957 | 722 | 1104 | 1020 | 960 |
Swell 2 Height (m) Direction Period (s) | SW 14 | S 12 | SSE 10 | SSE 10 | S 11 | E 13 | S 14 | S 14 | E 14 | E 14 | E 14 | E 13 | SSW 18 | SSW 18 | SSW 16 | SSW 16 | SW 11 | SW 11 | SW 11 | SSW 17 | SSW 15 |
| kJ | 100 | 75 | 35 | 34 | 64 | 85 | 268 | 195 | 199 | 229 | 384 | 426 | 62 | 120 | 169 | 318 | 503 | 389 | 298 | 758 | 706 |
Swell 3 Height (m) Direction Period (s) | SSE 10 | SW 14 | SW 14 | SW 14 | E 14 | S 11 | S 10 | E 12 | S 14 | SW 12 | SSW 13 | SSW 20 | NNE 10 | SE 10 | SSE 10 | SSE 10 | SSW 19 | SSW 18 | SSW 17 | SW 11 | SW 12 |
| kJ | 30 | 51 | 50 | 48 | 66 | 37 | 18 | 107 | 93 | 6 | 17 | 38 | 20 | 25 | 38 | 38 | 283 | 437 | 596 | 263 | 414 |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | E 8 | ENE 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 7 | E 13 | E 13 | E 13 | E 13 | ENE 12 | — | — | — | — |
| kJ | 280 | 330 | 301 | 394 | 333 | 482 | 645 | 482 | 510 | 531 | 424 | 272 | 1121 | 1087 | 1283 | 1210 | 1338 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 12 | 144 | 12 | 27 | 27 | 144 | 145 | 147 | 31 | 31 | 28 | 14 | 12 | 21 | 12 | 12 | 12 | 0 | 12 | 12 | 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.
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