Surf Forecasts:
Sandy Beach surf forecast from 11 Aug 2026:
- Best quality surf: Saturday 15 Aug, 2PM (local time) - 10ft (3.0m), 12s period, E swell with cross-offshore winds.
- Most powerful swell: Sunday 16 Aug, 11AM (local time) - 23ft (7.0m), 13s period, ENE swell with 18,206 kJ wave energy.
- Next surfable swell (1★+): Saturday 15 Aug, 2PM (local time) - 10ft (3.0m), 12s period with E swell.
Best Forecast Surf Conditions for Sandy Beach this week:
The surf forecast for Sandy Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Aug 15) at 2PM. The primary swell is predicted to be 3.0m and 12s period with a secondary swell of 0.7m and 13s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Sandy Beach in the next 16 days are 7.0m 13s and forecast to arrive on Sunday (Aug 16) at 11AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 6s period and expected on Monday (Aug 17) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2PM (Sat 15th Aug) | 10ft (3.0m) 12s |
| Best Surf | 2PM (Sat 15th Aug) | 10ft (3.0m) 12s |
| Most Powerful | 11AM (Sun 16th Aug) | 23ft (7.0m) 13s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright, Rusty here, checkin' in from the local stretch.
First off, let's be real. The next two weeks are lookin' pretty bleak for any proper sessions. We've got a long dry spell ahead. The water is sitting at about 80.6°, which is pretty much bang on average for this time of year, so at least the baths are nice.
The first spot we gotta look at is Sandy Beach. This is a beach and reef setup, and it's gonna be a long wait. For the next several days, from Monday the 10th to Friday the 14th, it's all cross-shore wind and lumpy chop. The swell energy is weak to moderate at best, with values mostly in the 400s and 800s. Not worth paddling out for. You'd be fighting a losing battle.
Then on Saturday the 15th of August, things get weird. The swell jumps up to 9.8ft from the ENE, with a period of 12 seconds. The energy is strong at 2499. But with that 25 mph cross-shore wind, it's gonna be a mess. It's not until Saturday afternoon that we see a brief window: the wind swings cross-off from the NNE, and the swell hits 11.5ft. The report says the wind and tide are favorable, but that size is already too big for this break. Unless you're a masochist on a big gun, give it a miss. Sunday the 16th is even more insane, with 23.0ft swell and a near gale. That's not surfing, that's a survival test or a kite session. The whole setup looks more interesting for kite surfing than paddle surfing those days.
After that, things drop back down, but the wind stays onshore or cross-shore for the rest of the run. From Monday the 17th to the 25th, we're looking at small, weak swells with even weaker energy values, some dipping below 100. The wind is relentless from the ENE and NE, keeping everything lumpy. There's no true standout here.
So, to be honest? There's nothing on offer that I can get excited about. The whole 16-day window is a bust for quality waves. Sometimes the ocean just says no. We're in a blank run, and for this area, that happens. Forecasts can always change, but as it stands, keep your board in the car and your expectations low.
Short Range ForecastMostly dry. Warm (max 26°C on Mon afternoon, min 25°C on Tue night). Mainly fresh winds. | Days 5-7 Weather SummaryHeavy rain (total 26mm), heaviest during Sat night. Warm (max 26°C on Thu afternoon, min 25°C on Thu night). Mainly near gales. | |||||||||||||||||||
Mon 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | ||||||||||||||
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 8 | SSW 15 | E 7 | SSW 14 | S 20 | S 18 | S 18 | S 16 | S 16 | S 15 | S 15 | S 14 | ENE 8 | ENE 8 | ENE 12 | ENE 13 | ENE 13 | ENE 13 | E 11 | ENE 10 |
Wave Graph  | ||||||||||||||||||||
 kJ | 176 | 186 | 176 | 269 | 276 | 509 | 498 | 520 | 501 | 662 | 537 | 426 | 474 | 686 | 2274 | 3771 | 6344 | 18206 | 7696 | 901 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-on | cross | cross-on | cross | cross | cross-on | cross | cross | cross | cross | cross | cross | cross | cross-off | off | cross-on | cross-on | on |
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 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 14 | 12 | 5 | 2 |
Temp °C | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 26 | 26 | 25 | 25 | 26 | 25 | 26 | 26 | 26 | 26 | 27 | 26 |
Feels °C | 24 | 26 | 25 | 25 | 23 | 24 | 22 | 22 | 23 | 23 | 23 | 22 | 23 | 22 | 24 | 23 | 22 | 21 | 27 | 25 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | 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 16 | ENE 11 | ENE 10 |
| kJ | 176 | 186 | 165 | 269 | 243 | 509 | 498 | 520 | 501 | 662 | 537 | 416 | 333 | 243 | 225 | 168 | 170 | 329 | 6658 | 901 |
Swell 2 Height (m) Direction Period (s) | SSW 11 | SSE 9 | SSW 11 | SSE 9 | S 20 | SSW 13 | SSW 13 | SSW 13 | SSW 12 | W 12 | W 11 | W 12 | W 12 | E 12 | W 11 | W 13 | S 18 | W 12 | S 13 | WSW 6 |
| kJ | 42 | 17 | 41 | 16 | 276 | 218 | 218 | 170 | 113 | 11 | 10 | 11 | 11 | 80 | 9 | 30 | 56 | 25 | 119 | 45 |
Swell 3 Height (m) Direction Period (s) | SSE 10 | SSW 11 | SSE 9 | S 21 | SSE 9 | W 13 | W 12 | W 12 | W 12 | SW 19 | SW 18 | SW 18 | SSW 18 | W 11 | SW 17 | S 16 | W 13 | SSW 19 | S 16 | S 16 |
| kJ | 36 | 23 | 16 | 79 | 15 | 30 | 25 | 25 | 11 | 14 | 13 | 12 | 30 | 21 | 12 | 42 | 30 | 37 | 127 | 81 |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 7 | E 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | E 7 | ENE 6 | ENE 7 | E 7 | ENE 7 | ENE 8 | ENE 8 | ENE 12 | ENE 13 | ENE 13 | ENE 13 | E 11 | S 6 |
| kJ | 169 | 164 | 176 | 156 | 186 | 155 | 161 | 262 | 233 | 278 | 411 | 426 | 474 | 686 | 2274 | 3771 | 6344 | 18206 | 7696 | 288 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 47 | 16 | 47 | 47 | 18 | 47 | 55 | 47 | 48 | 110 | 48 | 55 | 110 | 47 | 216 | 216 | 198 | 136 | 126 | 57 |
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.
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