Surf Forecasts:
Duds Reef surf forecast from 28 Aug 2026:
- Most powerful swell: Friday 4 Sep, 2AM (local time) - 5ft (1.6m), 11s period, E swell with 628 kJ wave energy.
Best Forecast Surf Conditions for Duds Reef this week:
The most powerful waves expected at Duds Reef in the next 16 days are 1.6m 11s and forecast to arrive on Friday (Sep 04) at 2AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 8s period and expected on Wednesday (Sep 02) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Fri 4th Sep) | 5ft (1.6m) 11s |
Table - best surf conditions forecast for Duds Reef over the next 16 days.
The Lowdown
Alright, let’s get into it.
Look, I’ve stared at this forecast for the next couple of weeks and, honestly, my heart’s not in it for most of it. We’ve got a run of fresh, cross-shore winds that are just gonna chop up whatever’s out there. The first few days are a write-off for getting any real quality. We’re looking at a gap at the start with nothing worth paddling out for. From the 28th through the 3rd, it’s all poor surf and lumpy cross-chop. Just not worth the hassle.
Then we start seeing some shoulder-high stuff around the 4th, but the wind is still mostly cross-off, which is better but not clean. By the 6th, we get some bigger energy, but it’s still a bit messy. The tide and conditions are questionable, so you’d be scratching for a wave, not surfing.
There’s a bit of a stand-out window starting the 8th of September. The swell direction swings around to the SSW, and we get a long period of 16 seconds, which is proper groundswell. The combined energy is strong (1069), and we’ve got moderate cross-off winds making things clean. That Tuesday morning is your best bet for a decent session. It’s not huge, around 4ft, but that long period and clean conditions should make Duds Reef (Big Island) work nicely.
After that, it gets messy again with a near gale on Wednesday the 9th. That’s just blown out. The following days, we get some size, but the wind stays cross or onshore, which kills it. The water temp is sitting at 82°, which is just about average for this time of year, so no worries there.
The real highlight, if you can wait, is the 8th. It’s a promise, not a guarantee, but that’s the one to circle.
Rusty
Short Range ForecastMostly dry. Warm (max 27°C on Fri morning, min 25°C on Fri morning). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 28°C on Tue afternoon, min 25°C on Mon night). Mainly fresh winds. | ||||||||||||||||||||
Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | |||||||||||||||
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) | S 14 | S 14 | S 13 | S 13 | E 7 | E 7 | SSW 16 | E 7 | ENE 7 | E 7 | ENE 7 | ENE 8 | SSW 18 | S 18 | S 17 | S 16 | S 16 | S 15 | E 9 | E 10 | E 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 329 | 399 | 289 | 126 | 130 | 236 | 226 | 302 | 273 | 262 | 210 | 218 | 329 | 314 | 465 | 520 | 406 | 309 | 299 | 414 | 628 |
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 | cross | cross-off |
High Tide | 4:05PM0.67m | 4:31AM0.50m | 4:31PM0.62m | 5:12AM0.55m | 4:56PM0.56m | 5:56AM0.58m | 5:20PM0.49m | 6:48AM0.60m | 5:42PM0.41m | 7:51AM0.61m | 5:57PM0.35m | 9:11AM0.63m | |||||||||
Low Tide | 9:32AM0.10m | 10:37PM0.10m | 10:15AM0.14m | 10:58PM0.09m | 11:02AM0.18m | 11:20PM0.08m | 11:55AM0.24m | 11:45PM0.07m | 1:04PM0.29m | 00:15AM0.07m | 2:51PM0.32m | 00:53AM0.08m | 1:48AM0.10m | ||||||||
 | |  |  | | | | | | | | | | | | | |  | | | | |
 | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — |
 | — | 6:51 | — | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 27 | 25 | 26 | 27 | 25 | 27 | 27 | 25 | 27 | 27 | 26 | 27 | 28 | 26 | 27 | 28 | 26 | 27 | 28 | 26 |
Feels °C | 25 | 25 | 23 | 23 | 24 | 23 | 24 | 24 | 22 | 24 | 24 | 24 | 25 | 26 | 25 | 25 | 27 | 26 | 25 | 26 | 25 |
Swell 1 Height (m) Direction Period (s) | S 14 | S 14 | S 13 | S 13 | S 12 | S 12 | SSW 16 | S 12 | E 7 | SSW 15 | SSW 14 | S 10 | SSW 18 | S 18 | S 17 | ENE 8 | S 16 | S 15 | S 14 | S 14 | S 13 |
| kJ | 329 | 399 | 289 | 121 | 76 | 138 | 226 | 100 | 159 | 191 | 183 | 51 | 329 | 314 | 465 | 181 | 406 | 279 | 268 | 250 | 225 |
Swell 2 Height (m) Direction Period (s) | SSW 11 | E 15 | E 14 | S 13 | S 13 | SSW 17 | SSW 12 | SSW 16 | SSW 15 | S 11 | S 11 | S 19 | SW 14 | S 12 | SSW 14 | S 16 | SSE 10 | S 11 | E 13 | E 12 | SSW 18 |
| kJ | 38 | 106 | 104 | 126 | 89 | 186 | 46 | 162 | 199 | 85 | 79 | 192 | 100 | 75 | 79 | 520 | 33 | 57 | 84 | 103 | 31 |
Swell 3 Height (m) Direction Period (s) | E 16 | SSW 19 | SW 19 | E 13 | E 13 | E 12 | ENE 11 | W 11 | S 11 | S 21 | ENE 9 | SW 14 | S 10 | SW 14 | W 11 | SSE 10 | E 12 | E 14 | SSE 10 | SSE 10 | W 9 |
| kJ | 45 | 35 | 90 | 89 | 81 | 75 | 43 | 9 | 84 | 76 | 29 | 74 | 47 | 51 | 9 | 19 | 26 | 57 | 33 | 32 | 6 |
Wind waves Height (m) Direction Period (s) | E 6 | E 6 | E 7 | E 6 | E 7 | E 7 | E 7 | E 7 | ENE 7 | E 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | E 8 | ENE 8 | ENE 8 | E 8 | E 9 | E 10 | E 11 |
| kJ | 101 | 91 | 144 | 119 | 130 | 236 | 192 | 302 | 273 | 262 | 210 | 218 | 238 | 286 | 309 | 356 | 238 | 309 | 299 | 414 | 628 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 12 | 144 | 12 | 21 | 21 | 21 | 13 | 27 | 12 | 14 | 21 | 12 | 12 | 21 | 12 | 12 | 15 | 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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