Surf Forecasts:
Duds Reef surf forecast from 1 Aug 2026:
- Best quality surf: Tuesday 4 Aug, 5AM (local time) - 4ft (1.2m), 11s period, ENE swell with cross-offshore winds.
- Most powerful swell: Saturday 1 Aug, 11AM (local time) - 10ft (3.0m), 8s period, E swell with 1,039 kJ wave energy.
- Next surfable swell (1★+): Monday 3 Aug, 5AM (local time) - 5ft (1.5m), 8s 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 (Aug 03) at 5AM. The primary swell is predicted to be 1.5m and 8s period with a secondary swell of 0.5m and 13s. Another secondary swell of 0.4m 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 3.0m 8s and forecast to arrive on Saturday (Aug 01) at 11AM. 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 3rd Aug) | 5ft (1.5m) 8s |
| Best Surf | 5AM (Tue 4th Aug) | 4ft (1.2m) 11s |
| Most Powerful | 11AM (Sat 1st Aug) | 10ft (3.0m) 8s |
Table - best surf conditions forecast for Duds Reef over the next 16 days.
The Lowdown
G'day, I'm Rusty.
Alright, look, I'm gonna level with you. This 16-day stretch is a real challenge. The only spot the charts are even looking at is Duds Reef, and it's a tough one. The water temp is sitting right around average for this time of year, so no surprises there.
The whole period kicks off with a bang, but not the good kind. From Saturday, 1st August, we've got a strong easterly swell pushing in, but it's absolutely hammered by a strong cross-breeze. The combined energy is a solid 1293, so there's plenty of power, but the wind is just wrecking it. It's a messy, lumpy mess. That swell hangs around through Sunday, dropping a bit, but the wind stays on it. It's a tough start.
We finally get a bit of a breather Monday afternoon, the 3rd of August. The wind eases back and turns cross-offshore, cleaning up the 4ft swell from the east-northeast. The wave energy is still moderate at 380, but it's our first real chance to get a clean wave. It's still not going to be epic, but it's surfable.
Tuesday, 4th of August, is the best we're going to see. The afternoon session has a light 4ft east swell with a long 11-second period, and the wind goes near glassy, cross-offshore. The energy is moderate at 437, and the conditions are described as clean. This is your window. Duds Reef is a reef break, so it'll handle that longer period better than a beach break, handling the shape. Expect some crowds, as it's a spot that can get busy.
After that, it's a sad story. The swell drops right off from Wednesday, 5th August, into tiny, weak waves. The wind goes all over the shop, with some glassy pockets but only on tiny, 1ft swell. The energy is weak, under 260. The period does get long, up to 21 seconds on the 7th, but it's on a 1ft swell with a strong cross-wind. It's a kite-surfing setup more than anything.
From the 8th of August through to the 16th, it's a series of poor conditions. The wind is a consistent fresh easterly cross-breeze, and while the swell energy fluctuates between moderate and strong, reaching 777 on the 12th, it's all blown out and lumpy. There's no let-up.
Honestly, if you're desperate, point your board for Duds Reef on Tuesday afternoon, 4th of August. That's your one real shot. The rest of the time, it's a write-off.
Rusty.
Short Range ForecastMostly dry. Warm (max 28°C on Mon afternoon, min 24°C on Sun night). Winds decreasing (strong winds from the ENE on Sat morning, light winds from the NE by Sun night). | Days 5-7 Weather SummaryLight rain (total 5mm), mostly falling on Wed afternoon. Warm (max 27°C on Tue morning, min 25°C on Mon night). Wind will be generally light. | ||||||||||||||||||
Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | ||||||||||||||
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 8 | E 8 | E 8 | E 8 | E 8 | ENE 8 | E 8 | E 8 | ENE 8 | ENE 8 | E 11 | E 11 | ENE 11 | ENE 10 | ENE 9 | SW 15 | SSW 14 | SW 14 | SSW 14 |
Wave Graph  | |||||||||||||||||||
 kJ | 742 | 1039 | 659 | 659 | 472 | 482 | 358 | 239 | 212 | 151 | 345 | 281 | 240 | 125 | 88 | 107 | 81 | 102 | 138 |
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-off | cross-off | cross | cross-off | cross | on | glassy | cross | glassy | cross | cross |
High Tide | 5:33AM0.41m | 5:35PM0.65m | 6:22AM0.44m | 5:59PM0.58m | 7:18AM0.48m | 6:23PM0.51m | 8:25AM0.52m | 6:46PM0.44m | 9:44AM0.57m | 6:58PM0.36m | 11:04AM0.63m | ||||||||
Low Tide | 00:01AM0.12m | 10:55AM0.16m | 00:23AM0.11m | 11:42AM0.22m | 00:48AM0.10m | 12:42PM0.28m | 1:16AM0.09m | 2:09PM0.34m | 1:51AM0.09m | 4:49PM0.35m | 2:38AM0.08m | 3:41AM0.08m | |||||||
 |  |  |  | | | | | | | | | | |  |  | |  | | |
 | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — |
 | 7:10 | — | 7:10 | — | — | 7:09 | — | — | 7:09 | — | — | 7:08 | — | — | 7:07 | — | — | 7:07 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | — | 2 | — | — |
Temp °C | 25 | 26 | 27 | 25 | 27 | 27 | 25 | 27 | 28 | 25 | 27 | 27 | 26 | 27 | 27 | 26 | 26 | 27 | 26 |
Feels °C | 22 | 21 | 23 | 23 | 24 | 24 | 23 | 26 | 26 | 24 | 28 | 29 | 29 | 30 | 30 | 29 | 30 | 28 | 28 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 14 | E 14 | E 14 | E 14 | E 14 | E 13 | E 13 | E 12 | E 12 | E 11 | E 11 | ENE 11 | ENE 10 | ENE 9 | ENE 9 | ENE 8 | E 6 | E 6 |
| kJ | 220 | 194 | 194 | 144 | 138 | 142 | 87 | 84 | 77 | 101 | 345 | 281 | 240 | 125 | 84 | 77 | 53 | 27 | 26 |
Swell 2 Height (m) Direction Period (s) | E 15 | S 12 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SW 13 | SSW 12 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | SSW 11 | SSW 15 | SW 15 | SSW 14 | SW 14 | SSW 14 |
| kJ | 205 | 41 | 123 | 131 | 133 | 116 | 57 | 42 | 50 | 82 | 55 | 42 | 69 | 38 | 88 | 107 | 81 | 102 | 138 |
Swell 3 Height (m) Direction Period (s) | S 12 | S 16 | S 11 | S 11 | S 11 | W 12 | SW 13 | SSW 13 | SW 13 | SE 9 | SW 16 | SSW 16 | SSW 15 | SSW 16 | SSW 11 | SSE 12 | SSE 11 | ENE 8 | SSE 11 |
| kJ | 71 | 19 | 39 | 22 | 9 | 25 | 42 | 55 | 41 | 21 | 42 | 107 | 87 | 94 | 46 | 49 | 43 | 25 | 40 |
Wind waves Height (m) Direction Period (s) | E 8 | E 8 | E 8 | E 8 | E 8 | ENE 8 | E 8 | E 8 | ENE 8 | ENE 8 | — | SE 5 | — | — | — | — | — | — | — |
| kJ | 742 | 1039 | 659 | 659 | 472 | 482 | 358 | 239 | 212 | 151 | — | 7 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 148 | 145 | 144 | 24 | 29 | 173 | 12 | 15 | 16 | 0 | 12 | 0 | 6 | 10 | 0 | 6 | 0 | 10 | 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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