Surf Forecasts:
Duds Reef surf forecast from 22 Aug 2026:
- Best quality surf: Thursday 27 Aug, 5AM (local time) - 2.5ft (0.7m), 18s period, S swell with cross-offshore winds.
- Most powerful swell: Thursday 27 Aug, 11AM (local time) - 3.5ft (1.1m), 17s period, S swell with 710 kJ wave energy.
- Next surfable swell (1★+): Thursday 27 Aug, 5AM (local time) - 2.5ft (0.7m), 18s period with S 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 Thursday (Aug 27) at 5AM. The primary swell is predicted to be 0.7m and 18s period with a secondary swell of 1.0m and 7s. Another secondary swell of 1.2m and 6s 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 1.1m 17s and forecast to arrive on Thursday (Aug 27) at 11AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 10s period and expected on Saturday (Aug 22) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Thu 27th Aug) | 2.5ft (0.7m) 18s |
| Best Surf | 5AM (Thu 27th Aug) | 2.5ft (0.7m) 18s |
| Most Powerful | 11AM (Thu 27th Aug) | 3.5ft (1.1m) 17s |
Table - best surf conditions forecast for Duds Reef over the next 16 days.
The Lowdown
Alright, let’s talk Duds Reef. This is a reef break, open to a SSE swell, and it breaks fairly often. It’s for the intermediate crew, and you might see a few other folks out.
The next week is a grind. The wind is a constant cross-shore from the ENE, blowing 15 to 25 mph, and it’s making the ocean look like a washing machine. The water temp is normal for this time of year. We’ve got some long-period groundswell pushing through, with moderate to strong energy (550 to 981), but that wind is ruining the surface. It’s all lumpy cross-chop. If you’re looking to paddle, you’re better off waiting. This is more of a kite-surfing setup than a surfing one.
The first real chance comes on the 31st of August. The wind drops to 12 mph from the ENE, still cross-shore, but the swell is 5 ft on a better 11-second period from the ENE. The energy is strong (773 to 829), but it’s still a marginal deal.
Then September starts with a promise. On the 1st of September, the wind turns cross-offshore, and we get a 3 ft swell from the SSW with a very long 18 to 19-second period. That’s a proper groundswell. The energy is strong (710 to 872). The conditions are clean. On a reef, that long period can be a gift, wrapping around the point.
The 2nd of September has a light onshore wind with 3 ft to 3 ft of S swell. Not great.
The standout is the 3rd of September. Thursday morning is iffy, but Thursday afternoon, the wind goes glassy. The swell is 2 ft from the S with a 14-second period. The energy is moderate (444), and it’s glassy. That’s it. That’s the best of the 16 days. It’s small, but on a reef, a clean, glassy 2 ft groundswell can be a lot of fun.
After that, the 4th and 5th of September go back to cross-shore wind and lumpy 5 ft swell from the E. Not worth it.
So, the first week is a no-go. The only real standout is the afternoon of the 3rd of September with glassy conditions at Duds Reef. It’s a long way out, so keep your fingers crossed. The 31st of August is a distant second.
Rusty.
Short Range ForecastMostly dry. Warm (max 28°C on Mon afternoon, min 25°C on Sat night). Winds increasing (light winds from the ENE on Fri night, strong winds from the ENE by Sun morning). | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Tue morning, min 24°C on Wed night). Mainly fresh winds. | ||||||||||||||||||
Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | ||||||||||||||
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) | SW 16 | SSW 16 | SSW 16 | E 7 | E 7 | E 7 | ENE 7 | SSW 14 | SSW 13 | ENE 7 | E 8 | E 7 | ENE 7 | S 18 | S 18 | S 19 | S 17 | S 16 | S 16 |
Wave Graph  | |||||||||||||||||||
 kJ | 367 | 326 | 314 | 349 | 226 | 206 | 180 | 166 | 156 | 197 | 245 | 226 | 167 | 235 | 395 | 458 | 710 | 534 | 582 |
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 |
High Tide | 11:03PM0.23m | 1:02PM0.64m | 00:38AM0.25m | 1:42PM0.67m | 1:26AM0.28m | 2:15PM0.70m | 2:05AM0.31m | 2:45PM0.72m | 2:41AM0.35m | 3:13PM0.72m | 3:16AM0.40m | 3:40PM0.70m | 3:53AM0.45m | ||||||
Low Tide | 9:15PM0.23m | 9:01PM0.20m | 5:49AM0.13m | 9:11PM0.18m | 6:44AM0.10m | 9:26PM0.16m | 7:29AM0.08m | 9:43PM0.15m | 8:10AM0.07m | 10:00PM0.13m | 8:51AM0.08m | 10:18PM0.11m | |||||||
 |  | | | | | | | | |  | |  | | | | | | | |
 | — | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — |
 | 6:57 | — | 6:55 | — | — | 6:55 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 27 | 27 | 26 | 27 | 27 | 26 | 27 | 28 | 26 | 27 | 27 | 26 | 26 | 27 | 25 | 27 | 27 | 26 |
Feels °C | 28 | 25 | 25 | 25 | 23 | 24 | 24 | 25 | 27 | 25 | 26 | 25 | 26 | 23 | 24 | 24 | 25 | 25 | 27 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SSW 16 | SSW 16 | SW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | E 8 | SSW 12 | SSW 16 | SSW 15 | SSW 14 | S 18 | E 6 | S 17 | S 16 | S 16 |
| kJ | 367 | 326 | 314 | 245 | 201 | 191 | 134 | 166 | 156 | 149 | 117 | 196 | 167 | 215 | 395 | 81 | 710 | 534 | 582 |
Swell 2 Height (m) Direction Period (s) | ENE 7 | W 10 | W 10 | S 14 | SSE 13 | SSE 13 | S 13 | S 12 | SSE 8 | SSW 13 | SSE 13 | SSW 12 | SSW 12 | S 18 | SSW 13 | S 19 | E 6 | SSW 12 | E 18 |
| kJ | 58 | 74 | 55 | 106 | 139 | 98 | 86 | 77 | 22 | 140 | 127 | 81 | 81 | 235 | 135 | 458 | 80 | 79 | 58 |
Swell 3 Height (m) Direction Period (s) | W 10 | S 14 | S 12 | WNW 10 | WNW 11 | WNW 10 | E 9 | NW 11 | SSE 12 | SSE 7 | SSW 16 | SSE 7 | S 18 | SSE 12 | WNW 10 | SSW 13 | SSW 12 | NW 10 | WNW 9 |
| kJ | 50 | 107 | 47 | 62 | 66 | 39 | 39 | 32 | 48 | 29 | 146 | 20 | 167 | 14 | 10 | 135 | 79 | 14 | 8 |
Wind waves Height (m) Direction Period (s) | ENE 7 | E 7 | E 7 | E 7 | E 7 | E 7 | ENE 7 | E 7 | E 7 | ENE 7 | E 8 | E 7 | ENE 7 | E 7 | E 6 | ENE 6 | E 6 | E 6 | E 6 |
| kJ | 70 | 117 | 203 | 349 | 226 | 206 | 180 | 148 | 135 | 197 | 245 | 226 | 166 | 178 | 135 | 115 | 112 | 81 | 71 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 12 | 21 | 24 | 21 | 27 | 32 | 21 | 21 | 12 | 12 | 14 | 21 | 12 | 15 | 14 | 12 | 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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