
Surf Forecasts:
Sandy Beach surf forecast from 11 Aug 2026:
- Most powerful swell: Sunday 16 Aug, 8PM (local time) - 8ft (2.5m), 11s period, ENE swell with 1,615 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 2.5m 11s and forecast to arrive on Sunday (Aug 16) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 12s period and expected on Thursday (Aug 13) at 5AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8PM (Sun 16th Aug) | 8ft (2.5m) 11s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
G’day, Rusty here. Look, I’m gonna be straight with you – this 16-day window for Sandy Beach is a tough one. We’ve got a whole lot of nothing for the first five days, with the wind just hammering it from the ENE and cross-shore, leaving the surf lumpy and messy. There’s no real stand-out session to get excited about, and the start of the run is a write-off.
From Tuesday the 11th through to Saturday the 15th, it’s all poor surf conditions. The wind is a fresh to strong breeze, mostly cross or cross-onshore, and the waves are a mess. You’d be wasting your time.
We finally get a bit of a glimmer on Sunday the 16th. The morning has a 8ft swell from the ENE, with a period of 11 seconds and the combined energy hitting 1677 (moderate to strong). The wind is a cross-offshore strong breeze, and the report says “clean.” This is the only session that looks even marginal. That 8ft is getting up there – only for the experienced crew. The afternoon though, the wind kicks up to a near gale, so forget it.
Monday the 17th is a write-off with onshore wind and risk of thunderstorms. The swell is still 8ft from the ENE, but the wind is onshore, so it’s a mess.
The following week is pretty grim. There’s a small window on Tuesday the 18th morning with a 6ft swell from the NE, a light breeze from the ESE, and the energy is 603 (moderate). It’s described as “marginal” with questionable tide conditions. That’s the best of a bad bunch, but it’s not much to write home about. The rest of the week is a repeat of the same old story: ENE cross-shore wind, lumpy, and poor.
Late in the run, on Sunday the 23rd, the morning has a 3ft swell from the SSW with a long 15-second period, and the energy is 1023 (strong). The wind is a fresh cross-shore, so it’s still lumpy, but the long period might give a few clean ones if you can find a bank. The water temp is about average for this time of year. Not a standout, but a last chance for a grovel.
So, honestly, there’s no real standout. If you’re desperate, Sunday the 16th morning is the only call, but only if you’re an expert and can handle the size and the strong breeze. For the rest of us, it’s a waiting game. The forecast can change, but right now, it’s a tough stretch.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Mon night, min 25°C on Tue night). Mainly fresh winds. | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Sun morning. Warm (max 26°C on Thu night, min 25°C on Thu night). Mainly strong winds. | ||||||||||||||||||
Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | ||||||||||||||
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 | SSW 14 | S 20 | S 18 | S 18 | S 16 | S 16 | S 15 | S 15 | S 14 | ENE 8 | ENE 8 | ENE 9 | ENE 9 | ENE 11 | ENE 11 | ENE 11 | ENE 11 |
Wave Graph | |||||||||||||||||||
186 | 203 | 269 | 276 | 509 | 498 | 520 | 501 | 662 | 537 | 416 | 395 | 589 | 603 | 764 | 1485 | 1429 | 1503 | 1576 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-off | cross-off | cross |
High Tide | 1:52AM0.27m | 2:36PM0.79m | 2:40AM0.31m | 3:14PM0.76m | 3:27AM0.36m | 3:49PM0.71m | 4:15AM0.41m | 4:22PM0.64m | 5:04AM0.45m | 4:53PM0.55m | 5:55AM0.48m | 5:21PM0.47m | |||||||
Low Tide | 9:21PM0.06m | 7:31AM-0.04m | 9:52PM0.05m | 8:22AM-0.02m | 10:21PM0.04m | 9:11AM0.01m | 10:50PM0.04m | 10:01AM0.07m | 11:17PM0.04m | 10:54AM0.13m | 11:44PM0.05m | 11:53AM0.20m | 00:11AM0.05m | ||||||
— | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | |
7:04 | — | 7:02 | — | — | 7:02 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 2 | 45 |
Temp °C | 26 | 26 | 26 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 26 | 26 | 26 |
Feels °C | 25 | 25 | 24 | 23 | 24 | 24 | 24 | 24 | 23 | 24 | 23 | 22 | 23 | 23 | 23 | 22 | 23 | 23 | 22 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | SSW 14 | SSW 14 | SSW 14 | S 18 | S 18 | S 16 | S 16 | S 15 | S 15 | S 14 | S 14 | S 14 | S 13 | S 13 | S 13 | S 13 | S 13 | S 14 |
186 | 165 | 269 | 243 | 509 | 498 | 520 | 501 | 662 | 537 | 416 | 333 | 306 | 222 | 168 | 222 | 116 | 160 | 188 | |
Swell 2 Height (m) Direction Period (s) | SSE 9 | SSW 11 | SSE 9 | S 20 | SSW 13 | SSW 13 | SSW 13 | SSW 12 | W 12 | W 11 | W 12 | W 12 | W 11 | W 11 | E 11 | S 18 | S 16 | S 16 | S 16 |
17 | 41 | 16 | 276 | 218 | 218 | 170 | 150 | 11 | 10 | 11 | 11 | 9 | 9 | 91 | 56 | 132 | 127 | 81 | |
Swell 3 Height (m) Direction Period (s) | SSW 11 | SSE 9 | S 21 | SSE 8 | W 13 | W 12 | W 12 | W 12 | SW 19 | SW 18 | SW 18 | SSW 18 | SSW 17 | NNW 9 | W 13 | W 13 | W 12 | W 12 | W 11 |
23 | 16 | 79 | 14 | 30 | 25 | 25 | 11 | 14 | 13 | 12 | 30 | 29 | 8 | 30 | 30 | 25 | 25 | 22 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | E 7 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 9 | ENE 9 | ENE 11 | ENE 11 | ENE 11 | ENE 11 |
186 | 203 | 156 | 191 | 182 | 172 | 270 | 225 | 268 | 326 | 403 | 395 | 589 | 603 | 764 | 1485 | 1429 | 1503 | 1576 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 16 | 47 | 48 | 47 | 47 | 49 | 47 | 50 | 59 | 48 | 55 | 110 | 48 | 111 | 216 | 47 | 216 | 216 | 131 |
Best forecast wave conditions in Oahu | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
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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.











