Surf Forecasts:
Duds Reef surf forecast from 16 Aug 2026:
- Best quality surf: Saturday 22 Aug, 8AM (local time) - 2.5ft (0.8m), 16s period, SSW swell with cross-offshore winds.
- Most powerful swell: Sunday 16 Aug, 2AM (local time) - 15ft (4.5m), 10s period, E swell with 4,185 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 5AM (local time) - 3ft (0.9m), 9s 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 Wednesday (Aug 19) at 5AM. The primary swell is predicted to be 0.9m and 9s period with a secondary swell of 0.6m and 12s. 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 4.5m 10s and forecast to arrive on Sunday (Aug 16) at 2AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 6s period and expected on Thursday (Aug 20) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Wed 19th Aug) | 3ft (0.9m) 9s |
| Best Surf | 8AM (Sat 22nd Aug) | 2.5ft (0.8m) 16s |
| Most Powerful | 2AM (Sun 16th Aug) | 15ft (4.5m) 10s |
Table - best surf conditions forecast for Duds Reef over the next 16 days.
The Lowdown
Hey folks, Rusty here. Let’s be straight with you: the next couple of weeks are looking pretty grim for any proper paddle surfing at Duds Reef. We’ve got a long stretch of onshore and cross-shore winds muscling up the water, and the swell just isn’t lining up right. Basically, it’s a waiting game, and the forecast is pretty clear that patience is the name of it.
The first real chance of anything even remotely worth getting wet for doesn’t show up until Thursday, August 20th. Even then, it’s just a marginal call—swell around 2ft from the SW with a long 17-18 second period, but the wind is still coming from the ESE, pushing a light cross-onshore chop. The wave energy is weak, with the combined energy reading just 397 in the morning. It’s not going to be pretty, but it’s the first sign of life. That marginal, small stuff lingers through Friday the 21st, but honestly, the conditions are so poor that you’d be better off finding something else to do.
After that, things really flatline. From Saturday the 22nd through to Monday the 24th, the swell drops right off, the wind stays up in the 15-30 km/h range from the E and ENE, and the waves are just messy, cross-shore slop. The energy readings are in the low hundreds—like 315 to 527—which tells you there’s nothing behind it. The period is all over the place too, which just adds to the confusion. It’s a dead zone, folks.
We get a bit of a tease right at the very end of the month, though. On Saturday the 29th, things get significantly bigger—we’re looking at a solid 10ft of east swell with a 9-second period in the morning, and the combined energy jumps all the way up to 1772. That is a serious amount of juice, no two ways about it. But here’s the catch: it’s still cross-shore ENE wind at 35 km/h, which is going to make it an absolute washing machine out there. You’d have to be a proper expert to even think about it, and even then, it’s more likely to be a session for the kite surfers than anyone on a paddleboard. The quality is still rated poor, and the energy is just wind-driven chop. It’s a big, powerful, and messy close-out.
So, the honest summary is this: there’s no standout swell in this whole 16-day window. The best of a bad bunch is that small, long-period SW groundswell on the 20th and 21st, but it’s tiny and the wind is just wrong. The bigger east swell at the end of the month is only for the brave, and by the looks of it, the kites will be having more fun. Keep the board in the car, but don’t hold your breath.
Rusty
Short Range ForecastHeavy rain (total 62mm), heaviest during Sun morning. Warm (max 27°C on Sun afternoon, min 24°C on Mon night). Winds decreasing (near gales from the ENE on Sat night, light winds from the ENE by Sun night). | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Wed afternoon, min 24°C on Tue night). Wind will be generally light. | ||||||||||||||||||
Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | ||||||||||||||
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 10 | E 9 | E 9 | S 14 | ENE 8 | S 14 | S 13 | S 13 | S 13 | E 9 | SW 16 | SW 16 | SSW 16 | SW 18 | SW 17 | SSW 16 | SW 17 | SSW 16 | SW 16 |
Wave Graph | |||||||||||||||||||
4185 | 950 | 506 | 315 | 334 | 329 | 222 | 215 | 166 | 122 | 129 | 125 | 175 | 316 | 305 | 347 | 295 | 326 | 367 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | cross | cross | cross | cross-off | cross | cross | cross | cross | cross | cross | cross-on | cross-on | cross-off | cross-on | cross-on | cross-off |
High Tide | 6:30AM0.53m | 5:53PM0.51m | 7:23AM0.54m | 6:10PM0.44m | 8:25AM0.55m | 6:13PM0.37m | 9:42AM0.56m | 11:04AM0.57m | 12:12PM0.60m | 11:03PM0.23m | |||||||||
Low Tide | 00:04AM0.09m | 12:13PM0.25m | 00:28AM0.10m | 1:18PM0.31m | 00:54AM0.11m | 2:59PM0.34m | 1:23AM0.13m | 2:04AM0.14m | 3:11AM0.15m | 9:15PM0.23m | |||||||||
— | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | |
7:01 | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — | |
mm | 18 | 35 | 8 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 27 | 26 | 26 | 26 | 25 | 26 | 27 | 25 | 26 | 27 | 26 | 26 | 27 | 26 | 27 | 27 | 26 |
Feels °C | 20 | 24 | 27 | 27 | 27 | 25 | 26 | 24 | 25 | 25 | 25 | 27 | 28 | 28 | 29 | 28 | 29 | 29 | 29 |
Swell 1 Height (m) Direction Period (s) | S 13 | SSE 9 | E 9 | E 8 | E 8 | E 7 | E 7 | S 13 | E 7 | S 13 | SW 16 | E 8 | E 8 | SW 18 | SW 17 | SSW 16 | SW 17 | SSW 16 | SW 16 |
176 | 523 | 506 | 228 | 172 | 134 | 106 | 215 | 88 | 114 | 129 | 86 | 64 | 316 | 305 | 347 | 295 | 326 | 367 | |
Swell 2 Height (m) Direction Period (s) | S 18 | S 13 | S 13 | S 7 | S 14 | S 14 | S 13 | SSW 17 | S 13 | SE 6 | S 12 | S 12 | SSW 16 | E 8 | E 7 | ENE 7 | E 9 | E 8 | ENE 7 |
99 | 121 | 215 | 113 | 334 | 329 | 222 | 115 | 166 | 11 | 69 | 71 | 175 | 42 | 40 | 43 | 38 | 22 | 30 | |
Swell 3 Height (m) Direction Period (s) | WNW 13 | S 16 | S 16 | S 14 | SSE 6 | S 6 | SW 6 | W 13 | SSW 18 | SW 18 | SE 10 | SW 16 | S 12 | S 11 | S 11 | S 11 | NE 8 | NE 7 | S 13 |
33 | 192 | 183 | 315 | 33 | 33 | 8 | 31 | 123 | 79 | 24 | 125 | 45 | 39 | 21 | 39 | 20 | 19 | 54 | |
Wind waves Height (m) Direction Period (s) | E 10 | E 9 | SSE 8 | — | ENE 8 | — | ENE 7 | E 7 | ENE 6 | E 9 | E 8 | NNE 6 | NE 6 | — | — | — | — | — | — |
4185 | 950 | 315 | — | 276 | — | 163 | 114 | 98 | 122 | 111 | 26 | 40 | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 201 | 174 | 33 | 6 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 0 | 10 | 10 | 0 | 12 | 12 | 0 |
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.











