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, grab your board, but maybe leave the wetsuit at home. We’ve got a tricky stretch ahead for Sandy Beach. The water’s sittin’ at a warm 81° with nothing weird going on temperature-wise—about average for this time of year. But the waves? Man, they’re gonna be a battle.
To be straight with you, the next week and a half is mostly a right-off. We’ve got a lot of wind and chop messing up what little swell is pushing in. The energy in the water is moderate, around 469 units Monday morning, but it’s a lumpy, cross-shore mess. We’ll see a few pulses of south swell midweek, but the trade winds are just gonna keep it ragged. By Thursday the 14th, winds pick up to 25 mph out of the NE, and it’s just messy cross-chop. Not worth your time.
There is a tiny window on Saturday the 15th in the afternoon. The winds go a bit cross-off, and the ocean cleans up a touch. Swell jumps to 7ft from the ENE, and the energy gets strong at 1105. It’s still a bit on the bigger side, so if you’re not solid on your board, maybe give it a miss. But for the crew that knows the break, it could be the pick of a poor bunch.
Then things get real. By Sunday the 16th, a bigger pulse of swell hits 8ft, but it’s onshore, near gale-force winds, and blown to bits. That’s a hard no. Monday the 17th has a brief moment with light SE winds and clean conditions, but the energy is maxing out at 1825, and it’s about 8ft from the ENE. That’s too much juice for most, and that size is strictly for the experts. It’s all beach and reef, so it could get heavy fast.
The second week just fades out. Swell drops, winds stay cross and messy. We see small pulses, but nothing that will have you calling in sick for. A bit of long-period SSW energy shows up on the 20th, but it’s small and won’t do much. The last few days are just full of onshore slop. Honestly, this whole stretch looks better for kite surfing than paddle surfing.
So, there you have it. If you’re desperate, keep an eye on the 15th and the 17th, but don’t hold your breath. The good news? This spot is fairly consistent, so it shouldn’t stay this quiet for too long. Forecasts can change. Hang tight.
Rusty
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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