Surf Forecasts:
Sandy Beach surf forecast from 23 Aug 2026:
- Most powerful swell: Thursday 27 Aug, 11AM (local time) - 3.5ft (1.0m), 17s period, S swell with 594 kJ wave energy.
Best Forecast Surf Conditions for Sandy Beach this week:
The most powerful waves expected at Sandy Beach in the next 16 days are 1.0m 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 0.7m 16s period and expected on Saturday (Aug 22) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11AM (Thu 27th Aug) | 3.5ft (1.0m) 17s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
G’day, Rusty here. I’ve had a good look at the charts for the next 16 days, and I won’t lie—it’s a grim stretch for riding waves. There’s a big dry spell at the start. From right now (August 22nd) straight through until the evening of September 3rd, every single session is rated poor surf conditions. That’s nearly two weeks with nothing worth paddling out for. The wind is hammering out of the ENE and NE, 19 to 25 mph, sitting cross or cross-onshore the whole time, just tearing the ocean up into a lumpy, cross-chop mess. Even on August 27th when a solid southeast groundswell rolls in with a 17-second period and combined swell energy of 795, that fresh cross-shore wind ruins it. Proper heartbreaking.
The first real chance doesn’t show up until Thursday, September 3rd, and it’s still only marginal. On the morning, we get a light offshore breeze out of the ESE at 6 mph, with a 7ft swell from the ENE at 8 seconds. The combined wave energy is strong at 834, but the surf quality is weak. That afternoon, the wind goes to a gentle cross-shore from the ENE, the swell bumps to 7ft, and the energy hits 902—still only a 2/10. For a determined surfer, Sandy Beach might offer a few lumpy, doable waves, but it won’t be pretty. At 7ft, that’s expert territory, so beginners should sit it out.
The only slim standout is that Thursday afternoon, September 3rd, at Sandy Beach. It’s a beach and reef setup, wide open to that ENE swell, which is exactly what it wants. With a gentle cross-shore, it’s the cleanest it’s gonna get. Expect crowds to be common—if there’s a sliver of a window, folks will be on it. Water temp is 80°F, right on average for the season. Apart from that one window, it’s a long, poor blank until then.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Sat afternoon, min 25°C on Sat night). Mainly strong winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Tue afternoon, min 25°C on Tue night). Mainly strong winds. | |||||||||||||||||||
Sat 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | ||||||||||||||
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) | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | E 7 | S 18 | S 19 | S 17 | S 16 | S 16 | S 14 | S 14 | ENE 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 302 | 346 | 276 | 350 | 277 | 277 | 254 | 261 | 310 | 310 | 247 | 233 | 307 | 351 | 594 | 427 | 482 | 260 | 324 | 212 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross | cross | cross | cross-on | cross | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross | cross | cross-on |
High Tide | 00:02AM0.21m | 12:51PM0.62m | 00:45AM0.24m | 1:26PM0.65m | 1:20AM0.27m | 1:56PM0.66m | 1:55AM0.30m | 2:25PM0.67m | 2:30AM0.34m | 2:53PM0.66m | 3:07AM0.39m | 3:21PM0.62m | 3:47AM0.44m | |||||||
Low Tide | 8:09PM0.14m | 5:23AM0.08m | 8:29PM0.12m | 6:13AM0.06m | 8:49PM0.11m | 6:56AM0.04m | 9:09PM0.10m | 7:36AM0.04m | 9:29PM0.09m | 8:15AM0.04m | 9:49PM0.07m | 8:57AM0.06m | 10:10PM0.06m | |||||||
 |  | |  | | | |  | | | | | | | | | | | | | |
 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — |
 | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 26 | 26 | 25 | 25 | 25 | 25 |
Feels °C | 24 | 24 | 23 | 23 | 23 | 25 | 25 | 25 | 24 | 23 | 22 | 21 | 22 | 22 | 24 | 24 | 22 | 22 | 21 | 22 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SSW 16 | SW 15 | SSW 15 | SW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 12 | SSW 16 | SSW 15 | SSW 14 | S 18 | S 19 | S 17 | S 16 | S 16 | S 14 | S 14 | S 13 |
| kJ | 255 | 212 | 116 | 191 | 100 | 168 | 156 | 127 | 85 | 142 | 121 | 215 | 307 | 351 | 594 | 427 | 482 | 260 | 324 | 173 |
Swell 2 Height (m) Direction Period (s) | W 10 | SSE 12 | S 13 | SSE 13 | SSE 13 | SSE 12 | SSE 12 | SSE 7 | SSW 16 | SSW 12 | SSW 12 | S 18 | SSW 13 | SSW 13 | S 12 | SSW 12 | NNE 8 | E 15 | E 14 | E 13 |
| kJ | 53 | 50 | 90 | 35 | 96 | 50 | 47 | 15 | 146 | 81 | 81 | 165 | 135 | 135 | 72 | 46 | 20 | 109 | 99 | 126 |
Swell 3 Height (m) Direction Period (s) | S 12 | WNW 10 | SSW 15 | S 11 | SSW 15 | SSW 18 | SSE 7 | SSE 12 | SSE 12 | SSE 6 | SSW 18 | SSE 12 | SSE 6 | SSW 16 | N 8 | W 9 | E 16 | SSW 11 | SSW 19 | SSW 10 |
| kJ | 47 | 34 | 76 | 22 | 71 | 62 | 21 | 46 | 28 | 8 | 109 | 27 | 8 | 50 | 6 | 7 | 46 | 22 | 36 | 18 |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | E 7 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 6 | ENE 6 | ENE 6 | ENE 7 |
| kJ | 302 | 346 | 276 | 350 | 277 | 277 | 254 | 261 | 310 | 310 | 247 | 233 | 165 | 139 | 143 | 162 | 145 | 182 | 177 | 212 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 48 | 57 | 55 | 55 | 57 | 55 | 55 | 49 | 49 | 55 | 55 | 47 | 49 | 57 | 47 | 47 | 48 | 16 | 48 | 61 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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Information about the Sandy Beach Surf forecast
The above surf forecast table for Sandy Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Sandy Beach can be found by selecting the local surf guide option on the grey menu. Our Sandy Beach 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 (Sandy Beach) 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 Sandy Beach 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.
Sandy's Beach is 15 km (9 miles) from the city of Kailua. If you plan a vacation in Oahu, look for hotels and other accommodation in Kailua. Kailua has rooms for a wide range of budgets as well as car hire and transport links.
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