Surf Forecasts:
Duds Reef surf forecast from 7 Sep 2026:
- Best quality surf: Monday 7 Sep, 11PM (local time) - 18ft (5.5m), 15s period, SSW swell with onshore winds.
- Most powerful swell: Monday 7 Sep, 11PM (local time) - 18ft (5.5m), 15s period, SSW swell with 12,677 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 11PM (local time) - 18ft (5.5m), 15s period with SSW 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 11PM. The primary swell is predicted to be 5.5m and 15s period with a secondary swell of 1.7m and 12s. Another secondary swell of 3.0m and 8s is also forecast. The wind is predicted to be onshore as the swell arrives.
The most powerful waves expected at Duds Reef in the next 16 days are 5.5m 15s and forecast to arrive on Monday (Sep 07) at 11PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.1m 11s period and expected on Tuesday (Sep 08) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Mon 7th Sep) | 18ft (5.5m) 15s |
| Best Surf | 11PM (Mon 7th Sep) | 18ft (5.5m) 15s |
| Most Powerful | 11PM (Mon 7th Sep) | 18ft (5.5m) 15s |
Table - best surf conditions forecast for Duds Reef over the next 16 days.
The Lowdown
G’day, Rusty here. Let’s break down what’s coming for Duds Reef. Right off the bat, it’s a rough start. The first several days are a total mess, with poor conditions lasting through the opening weekend. The first real chance of something decent doesn’t show up until Monday afternoon, 14 September.
Monday morning, the 7th, is blown out. The wind is ripping out of the ESE at 30 km/h, cross-onshore, with a lumpy 7 ft east swell. The energy is strong (2472), but the quality is zero. That afternoon is even worse – a 8 ft SW swell, cross-onshore at 40 km/h, and the ocean is a total mess (5026 energy). Tuesday the 8th is more of the same: fresh cross-onshore winds, lumpy 8 ft swell in the morning, then a moderate 7 ft in the afternoon. No go.
Wednesday the 9th sees a drop in size – 3 ft from the SSW, with a light seabreeze in the morning. The wind is onshore though, giving a marginal look. The combined energy is weak (500). Nothing to chase. Thursday the 10th has a 5 ft ENE swell, but a moderate cross-shore wind chops it up (688 energy). Friday the 11th shows a tiny 4 ft ENE swell, also cross-shore, still marginal.
The standout in this whole outlook is Monday afternoon, 14 September. The wind drops to a glassy 5 km/h from the south. The swell is a tiny 2 ft from the SSW, but with a very long period of 22 seconds. That’s proper groundswell energy (385), and with glassy conditions, Duds Reef will be clean and lined up. The reef should handle that long-period swell nicely. It’s a small wave, but for a patient surfer, it’ll be a real winner.
After that, Tuesday the 15th has a 3 ft SW swell with a 20-second period, cross-onshore wind in the morning, but still holding some energy (741). It’s marginal. The rest of the second week is a grind. From Wednesday the 16th onward, the wind is up from the ENE, mostly moderate to fresh, cross-shore, with small 2 ft to 4 ft SSW swells. The energy stays low (mostly under 800), and the wind keeps it chopped. The ocean is too ugly for paddle surfing – it’s more a kite setup, especially with that strong cross-shore wind.
So, bottom line: one bright spot on Monday 14 September afternoon for a glassy, tiny long-period swell. The rest is a bust. The water temperature is about 81°F, which is normal for this time of year. If you’re keen for a wave, mark that Monday afternoon.
Rusty.
Short Range ForecastHeavy rain (total 23mm), heaviest during Mon night. Warm (max 28°C on Tue afternoon, min 26°C on Mon morning). Winds decreasing (strong winds from the ESE on Mon night, calm by Wed morning). | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Thu afternoon, min 24°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | |||||||||||||||
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 12 | SW 14 | SSW 13 | SSW 9 | SSW 8 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | ENE 7 | SSW 18 | SW 16 | SW 16 | ENE 11 | SW 15 | SW 16 | SW 16 | SSW 13 | SW 15 | SSW 15 | SSW 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1213 | 2834 | 9058 | 1143 | 537 | 431 | 331 | 253 | 176 | 203 | 211 | 268 | 258 | 313 | 226 | 245 | 124 | 116 | 107 | 84 | 134 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | cross-on | cross-on | on | on | cross-on | cross-off | cross | cross | cross | cross | cross | cross | cross-on | cross | cross | cross | cross | cross-off |
High Tide | 1:37PM0.75m | 1:49AM0.35m | 2:17PM0.75m | 2:33AM0.42m | 2:52PM0.72m | 3:14AM0.49m | 3:25PM0.68m | 3:53AM0.55m | 3:54PM0.62m | 4:32AM0.59m | 4:21PM0.55m | 5:11AM0.62m | 4:46PM0.48m | ||||||||
Low Tide | 8:46PM0.13m | 7:12AM0.08m | 9:09PM0.11m | 8:06AM0.08m | 9:31PM0.09m | 8:56AM0.09m | 9:53PM0.08m | 9:45AM0.12m | 10:14PM0.07m | 10:32AM0.16m | 10:36PM0.07m | 11:21AM0.20m | 10:57PM0.08m | ||||||||
 | |  | |  |  | |  | |  | | | | | | | | | | | | |
 | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — |
 | — | 6:42 | — | — | 6:40 | — | — | 6:39 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — |
mm | 5 | 3 | 10 | 2 | — | — | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 27 | 27 | 27 | 28 | 27 | 28 | 28 | 27 | 26 | 27 | 25 | 27 | 27 | 26 | 26 | 27 | 26 | 26 | 27 | 26 |
Feels °C | 26 | 25 | 24 | 27 | 29 | 31 | 31 | 31 | 30 | 26 | 27 | 26 | 27 | 26 | 27 | 26 | 28 | 27 | 26 | 26 | 27 |
Swell 1 Height (m) Direction Period (s) | SW 11 | SW 14 | ENE 12 | W 11 | SSW 8 | SSW 8 | SSW 14 | SSW 13 | ENE 7 | E 7 | E 7 | SW 16 | ENE 11 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | SW 15 | SSW 15 | SSW 14 |
| kJ | 637 | 2834 | 847 | 980 | 537 | 163 | 331 | 253 | 91 | 131 | 106 | 268 | 198 | 194 | 161 | 131 | 100 | 71 | 107 | 84 | 134 |
Swell 2 Height (m) Direction Period (s) | SSE 8 | SSE 9 | SSW 16 | ENE 11 | W 9 | SSW 14 | SSW 8 | ENE 8 | SSW 13 | SSW 13 | SSW 12 | SSW 10 | SW 16 | SW 15 | SW 15 | SW 16 | SW 16 | SSW 13 | E 5 | E 5 | NE 9 |
| kJ | 163 | 304 | 773 | 512 | 275 | 431 | 75 | 54 | 176 | 173 | 172 | 69 | 258 | 229 | 226 | 245 | 124 | 116 | 14 | 8 | 36 |
Swell 3 Height (m) Direction Period (s) | SSW 17 | SSW 16 | NW 12 | SSW 15 | ENE 11 | ENE 10 | ENE 9 | E 13 | E 13 | SSW 16 | SSW 18 | E 11 | SW 10 | SW 9 | SE 8 | SW 8 | SW 13 | SSW 16 | SSW 12 | SW 12 | ENE 4 |
| kJ | 459 | 694 | 6 | 596 | 373 | 194 | 94 | 123 | 115 | 181 | 211 | 64 | 44 | 29 | 18 | 11 | 87 | 98 | 57 | 37 | 6 |
Wind waves Height (m) Direction Period (s) | E 12 | E 12 | SSW 13 | SSW 9 | — | — | — | — | SE 4 | ENE 7 | — | ENE 7 | — | ENE 11 | — | — | — | — | — | E 5 | — |
| kJ | 1213 | 1194 | 9058 | 1143 | — | — | — | — | 7 | 203 | — | 82 | — | 313 | — | — | — | — | — | 12 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 201 | 142 | 144 | 160 | 27 | 27 | 15 | 12 | 0 | 12 | 12 | 12 | 12 | 6 | 6 | 12 | 10 | 6 | 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.
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